Second RAM slot bad?

Troubling issue with my 24" iMac (late 2008, 3GHz, nVidia 8800).
With both RAM slots loaded, it crashes randomly in the first 15 minutes after boot. Sometimes this is a freeze, others the black "You must restart your computer" message. Regardless, after shutting down, it won't reboot successfully until the RAM has been re-seated (it'll stall at the plain gray screen, before the spinner or the Apple logo show up). Once re-seated, sometimes 2-3 times, it'll decide to boot again, only to suffer the same fate.
Brought it down to the minimum configuration - only the first slot filled. Works fine, rock-solid, runs for weeks without issue. Swap that same stick to the second slot, and we're back to crashing and needing to re-seat the RAM to get it rebooted. I've tried both 1GB sticks that came with the iMac, as well as a couple of 2GB sticks from Crucial - the behavior is the same regardless of the stick(s) being used. (All sticks are known to be good).
I've currently got one of the 2GB sticks in, been running for about a month without issue, but I'd really like to get the machine up to 4GB, so it's about time to get this fixed.
Aside from the testing I've done above, is there anything else I should do prior to setting up a time to drop it off at the local Apple Store for warranty service (still under the 1-year warranty, haven't bought Applecare yet, but planning on it)? Any other tests I should run or documentation I can provide to save both my and the tech's time?

So, it's been a month. Figured I should post an update on how things turned out.
Repaired permissions, backed up to an external drive, booted from it to be sure, and repaired permissions again.
Shut down, removed the backup drive, and decided to give it one more try before calling up the store. Performed the same procedure I've done so many times:
Unplugged the power cable. Let sit for 20 seconds (resets SMC).
Popped out the single 2GB stick from the left slot, seated it in the right slot. Seated the second 2GB stick in the left slot.
Plugged the power cable in.
Booted. Reset PRAM. Came up OK, did not log in. Shut down.
Booted again. Reset PRAM again. Came up OK again. Logged in this time.
From this point on, everything has worked flawlessly, across multiple reboots, for a few weeks now. I've run several memory tests, each of which has passed with flying colors.
I'm not sure exactly what the difference is this time around, but I'm certainly not complaining.

Similar Messages

Where do i find the second ram slot on a t43 thinkpad

i believe ram might be my issue causing my t43 to freeze moving the mouse pointer with the track pointer helps get things working i bought a new 1gb ram and installed it in the ram port since then i have been able to run sluggish applications more smoothly but after a while of using these applications up to an hour the t43 freezes using the track point put some life back in to the machine (enough to close the application) when i dont have anything running except the internet it runs fine i believe the t43 has some sort of second ram slot since in the system it now shows as 1.5gb of ram and not 1gb
should the t43 have a second ram slot how easy is it to get at i don't want to accidentally break something

Welcome to the forum!
The second RAM slot is under the keyboard. Check the HMM for removal instructions:
http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-58791
Hope this helps.
Cheers,
George
In daily use: R60F, R500F, T61, T410
Collecting dust: T60
Enjoying retirement: A31p, T42p,
Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W
Starting Thursday, 08/14/2014 I'll be away from the forums until further notice. Please do NOT send private messages since I won't be able to read them. Thank you.

Is second RAM slot available on my Satellite L30-10x (PSL33E)?

I'm not quite sure if there is or not a free slot for RAM on my omputer which I can add to the current 1GB is it 2 512 MB or is it straight 1GB in one slot and there is a free slot.
Can someone help?
Thanks.

Your Satellite notebook can handle with 2 GB RAM max and two slots are available. On the bottom side in the middle is placed memory slot.
Remove it and see how many RAM slots are there.

Second RAM slot?

I've managed to upgrade my Powerbook from 512mb to 1.25gb of RAM, by replacing the 256mb RAM chip in the underside compartment that's held down by 4 screws. Where is the other 256mb RAM chip, and would I be able to replace that?
Message was edited by: DancingRuRu

DancingRuRu:
Welcome to Apple Discussions.
Your PB has a maximum RAM capacity of 1.25 GB. There is one user installable slot in which you can put up to a 1 GB module. As Slicecom has previously noted you have 256 MB Logic Board RAM.
Good luck
cornelius

Ram Slot 2 is inoperable

I am trying to find out if it is at all possible to replace just he DIMM slot on my mid 2009 MBP? Opposed to replacing the logic board.
My second ram slot does not work, i have tried any and all possible remedies to no avail.

in My case the solution is GETTING NEW RAM WITH 1.35V / 1.38V ( This is DDR3 8 GiB Released 2012 onward). My OLD RAM is 1.50V ... I don't know what is technical explanation, but this worked like a charm. My Beats 15 P017AU now detected 16 GiB and 16 GiB USABLE.

MacBook Pro mid 2012 15" - one RAM slot gone bad

Hi,
Has anyone ever had the issue with not working RAM slot? My MacBook Pro mid 2012 (non-retina) suddenly froze and after restart was beeping three times every few seconds. I found out that the beeping signals bad RAM. Bought new chips, and the problem still exists. My mac can now run on one slot with 4GB RAM.
I did check the placement of the chips in the slots, i also checked one slot at a time, and one of them has gone broken.
Any ideas on how to make it run again? or if it is possible to replace the slots?
Brgds
Marek
MacBook Pro 2,7GHz Intel Core i7 / OSX 10.9.4

The Apple-accepted cure for a dead RAM slot is a new logic board. Unless you ahve AppleCare, that will be an expensive fix.
An Apple service option is the "depot repair." Instead of working on your computer in the Apple Store, they send it to a centralized refurbishment facility where they fix anything they find wrong (except for cosmetic damage and damage from abuse like dropping) for a flat fee of a little over US$300. That is between 30 and 40 percent of the parts and labor charges if Apple installs a new board in an Apple Store. Sometimes they will install an new battery at the depot without increasing the flat fee.
The downside is that it takes about a week; for that level of cost savings, I could do without my computer for a week.
So take it to Apple and ask about a depot repair.
A low-tech and low-cost option is to expand on what you are doing now--using one slot. Although the official RAM limit on your model is 8GB RAM (two 4GB models), your model can actually handle a total of 16GB (two 8GB modules. You can ignore the dead slot and put an 8GB module in the good slot. My 2012 MBP has 8GB RAM and is completely happy running Mavericks.
Be sure to ONLY get the RAM from an Mac-savvy vendor. For over a decade I've bought all our Mac RAM from one supplier. This is their page for an 8GB module for your MBP model:
http://eshop.macsales.com/item/OWC/1600DDR3S8GB/
I would also trust Crucial on this one. For a change they recognize that your model can use more RAM than stated in Apple's outdated specs:
http://www.crucial.com/usa/en/compatible-upgrade-for/Apple/macbook-pro-%2813-inc h-and-15-inch%2C-mid-2012%29

Early 2008 Macbook Pro - Bad RAM or Bad Slot(s)?

Firstly, allow me to apologize for any formatting errors on this post; I'm putting it together from my phone. I comprised a collection of photos and screen shots to aid in my plea, but I can't find a way to upload them from here. So I'll do my best to explain things colorfully. :)
Specs:
Early 2008 15" Macbook Pro
Model #: A1260
OS X Mountain Lion 10.8.Something.
Recently upgraded hard drive from stock 250GB to Seagate Momentus 500 GB.
Strange, multicolored split-second glitches have occurred three times the past two days.
This morning, my computer booted to the gray screen, as normal. Apple logo and spinning logo appeared.
Here's the issue: there is a vertical gray strip going straight through the middle of the monitor that cuts through part of the apple and half of the spinning wheel.
System stays on that screen for a few seconds, then reboots. Every time. Resetting PRAM/NVAM does nothing.
The RAM is stock. I've done the following:
RAM stick A in bottom slot - 3 beeps and no start-up.
RAM stick A in top slot - gray screen, apple & rotating logos, vertical gray line, restarts.
RAM stick B in bottom slot - 3 beeps and no start-up.
RAM stick B in top slot - gray screen, apple & rotating logos, vertical gray line, restarts.
Bad RAM or bad slots?
Thank you!
JS

IT LIVES!!!!!!
I reset the PRAM & SMC a few times. It froze on this screen when the progress bar got about halfway.
Then this... I left it on this screen for a while, then restarted. AND IT BOOTED LIKE NORMAL!
This is the problem report:
Interval Since Last Panic Report: 258499 sec
Panics Since Last Report:          1
Anonymous UUID:                    E99EE298-1EAD-9817-ABDF-BF6E43C51AFB
Fri Sep 6 16:56:10 2013
panic(cpu 1 caller 0xffffff80154b8655): Kernel trap at 0xffffff7f96a99154, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0x0000000000000010, CR3: 0x000000000e750000, CR4: 0x0000000000000660
RAX: 0x0000000000000001, RBX: 0xffffff807fe44000, RCX: 0xffffff8020932c28, RDX: 0xffffff80885c3a38
RSP: 0xffffff80885c3b60, RBP: 0xffffff80885c3b60, RSI: 0x0000000000000000, RDI: 0x0000000000000000
R8: 0x0000000000000000, R9: 0x00000000000003ff, R10: 0xffffffffffffffff, R11: 0x00000000ffffffff
R12: 0xffffff807fe44000, R13: 0x0000000000000000, R14: 0x0000000000000002, R15: 0x0000000000000000
RFL: 0x0000000000010246, RIP: 0xffffff7f96a99154, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x0000000000000010, Error code: 0x0000000000000000, Fault CPU: 0x1
Backtrace (CPU 1), Frame : Return Address
0xffffff80885c3800 : 0xffffff801541d626
0xffffff80885c3870 : 0xffffff80154b8655
0xffffff80885c3a40 : 0xffffff80154ce17d
0xffffff80885c3a60 : 0xffffff7f96a99154
0xffffff80885c3b60 : 0xffffff7f96a82844
0xffffff80885c3bb0 : 0xffffff7f96a8279a
0xffffff80885c3bd0 : 0xffffff7f96a5e28e
0xffffff80885c3c00 : 0xffffff7f95ab33a0
0xffffff80885c3c40 : 0xffffff7f95ab330f
0xffffff80885c3c60 : 0xffffff7f95ab875c
0xffffff80885c3cf0 : 0xffffff7f95ab0e50
0xffffff80885c3d20 : 0xffffff7f95b021cf
0xffffff80885c3d70 : 0xffffff8015833efb
0xffffff80885c3dc0 : 0xffffff8015865297
0xffffff80885c3e30 : 0xffffff801549874f
0xffffff80885c3e80 : 0xffffff8015420b3d
0xffffff80885c3eb0 : 0xffffff8015410448
0xffffff80885c3f00 : 0xffffff801541961b
0xffffff80885c3f70 : 0xffffff80154a6536
0xffffff80885c3fb0 : 0xffffff80154ce9e3
      Kernel Extensions in backtrace:
         com.apple.iokit.IOGraphicsFamily(2.3.7)[990D1A42-DF16-3AB9-ABC1-6A88AC142244]@0 xffffff7f95aa7000->0xffffff7f95adefff
            dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7f95a68000
         com.apple.NVDAResman(8.1.2)[96AE69DE-8A37-39D0-B2D3-D8446A6AA670]@0xffffff7f95a fe000->0xffffff7f95da3fff
            dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7f95a68000
            dependency: com.apple.iokit.IONDRVSupport(2.3.7)[6C8CFC18-75F0-3DEF-86C7-CEB2C1FD6BB1]@0xff ffff7f95aea000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.7)[990D1A42-DF16-3AB9-ABC1-6A88AC142244]@0 xffffff7f95aa7000
         com.apple.GeForce(8.1.2)[7EC545A4-4B57-32F1-8DC3-C31023AFBDCB]@0xffffff7f96a5a0 00->0xffffff7f96b27fff
            dependency: com.apple.NVDAResman(8.1.2)[96AE69DE-8A37-39D0-B2D3-D8446A6AA670]@0xffffff7f95a fe000
            dependency: com.apple.iokit.IONDRVSupport(2.3.7)[6C8CFC18-75F0-3DEF-86C7-CEB2C1FD6BB1]@0xff ffff7f95aea000
            dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7f95a68000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.7)[990D1A42-DF16-3AB9-ABC1-6A88AC142244]@0 xffffff7f95aa7000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
12E55
Kernel version:
Darwin Kernel Version 12.4.0: Wed May 1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64
Kernel UUID: 896CB1E3-AB79-3DF1-B595-549DFFDF3D36
Kernel slide:     0x0000000015200000
Kernel text base: 0xffffff8015400000
System model name: MacBookPro4,1 (Mac-F42C89C8)
System uptime in nanoseconds: 36733888944
last loaded kext at 27900573190: com.apple.driver.AudioAUUC 1.60 (addr 0xffffff7f96d0c000, size 32768)
loaded kexts:
com.apple.driver.AudioAUUC 1.60
com.apple.iokit.IOBluetoothSerialManager 4.1.4f2
com.apple.driver.AppleTyMCEDriver 1.0.2d2
com.apple.filesystems.autofs 3.0
com.apple.driver.AppleHDAHardwareConfigDriver 2.3.7fc4
com.apple.driver.AppleHDA 2.3.7fc4
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.ApplePolicyControl 3.4.5
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.AppleLPC 1.6.0
com.apple.GeForce 8.1.2
com.apple.driver.AppleUpstreamUserClient 3.5.10
com.apple.driver.AppleSMCPDRC 1.0.0
com.apple.driver.AppleSMCLMU 2.0.3d0
com.apple.iokit.IOBluetoothUSBDFU 4.1.4f2
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport 4.1.4f2
com.apple.driver.AppleMuxControl 3.4.5
com.apple.driver.AppleBacklight 170.2.5
com.apple.driver.AppleMCCSControl 1.1.11
com.apple.nvidia.NVDAStartup 8.1.2
com.apple.driver.SMCMotionSensor 3.0.3d1
com.apple.driver.AppleUSBTCButtons 237.1
com.apple.driver.AppleUSBTCKeyEventDriver 237.1
com.apple.driver.AppleUSBTCKeyboard 237.1
com.apple.driver.AppleIRController 320.15
com.apple.iokit.SCSITaskUserClient 3.5.5
com.apple.driver.XsanFilter 404
com.apple.driver.AppleFileSystemDriver 3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 34
com.apple.iokit.IOAHCIBlockStorage 2.3.1
com.apple.driver.AppleAHCIPort 2.5.2
com.apple.driver.AppleIntelPIIXATA 2.5.1
com.apple.driver.AppleUSBHub 5.5.5
com.apple.driver.AirPortBrcm43224 600.36.17
com.apple.driver.AppleFWOHCI 4.9.6
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.iokit.AppleYukon2 3.2.3b1
com.apple.driver.AppleUSBEHCI 5.5.0
com.apple.driver.AppleUSBUHCI 5.2.5
com.apple.driver.AppleEFINVRAM 1.7
com.apple.driver.AppleRTC 1.5
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleACPIButtons 1.7
com.apple.driver.AppleSMBIOS 1.9
com.apple.driver.AppleACPIEC 1.7
com.apple.driver.AppleAPIC 1.6
com.apple.driver.AppleIntelCPUPowerManagementClient 196.0.0
com.apple.nke.applicationfirewall 4.0.39
com.apple.security.quarantine 2.1
com.apple.driver.AppleIntelCPUPowerManagement 196.0.0
com.apple.iokit.IOSerialFamily 10.0.6
com.apple.kext.triggers 1.0
com.apple.driver.DspFuncLib 2.3.7fc4
com.apple.iokit.IOAudioFamily 1.8.9fc11
com.apple.kext.OSvKernDSPLib 1.6
com.apple.iokit.IOSurface 86.0.4
com.apple.iokit.IOBluetoothFamily 4.1.4f2
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.AppleSMBusPCI 1.0.11d0
com.apple.nvidia.nv50hal 8.1.2
com.apple.NVDAResman 8.1.2
com.apple.driver.IOPlatformPluginFamily 5.3.0d51
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport 4.1.4f2
com.apple.iokit.IOFireWireIP 2.2.5
com.apple.driver.AppleHDAController 2.3.7fc4
com.apple.iokit.IOHDAFamily 2.3.7fc4
com.apple.driver.AppleGraphicsControl 3.4.5
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.driver.AppleSMBusController 1.0.11d0
com.apple.iokit.IONDRVSupport 2.3.7
com.apple.iokit.IOGraphicsFamily 2.3.7
com.apple.driver.AppleSMC 3.1.4d2
com.apple.driver.AppleUSBMultitouch 237.3
com.apple.iokit.IOUSBHIDDriver 5.2.5
com.apple.driver.AppleUSBMergeNub 5.5.5
com.apple.driver.AppleUSBComposite 5.2.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.5.5
com.apple.iokit.IOBDStorageFamily 1.7
com.apple.iokit.IODVDStorageFamily 1.7.1
com.apple.iokit.IOCDStorageFamily 1.7.1
com.apple.iokit.IOATAPIProtocolTransport 3.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.5
com.apple.iokit.IOAHCIFamily 2.3.1
com.apple.iokit.IOATAFamily 2.5.1
com.apple.iokit.IOUSBUserClient 5.5.5
com.apple.iokit.IO80211Family 530.4
com.apple.iokit.IOFireWireFamily 4.5.5
com.apple.iokit.IONetworkingFamily 3.0
com.apple.iokit.IOUSBFamily 5.6.0
com.apple.driver.AppleEFIRuntime 1.7
com.apple.iokit.IOHIDFamily 1.8.1
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 220.3
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.DiskImages 345
com.apple.iokit.IOStorageFamily 1.8
com.apple.driver.AppleKeyStore 28.21
com.apple.driver.AppleACPIPlatform 1.7
com.apple.iokit.IOPCIFamily 2.7.3
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.corecrypto 1.0
Model: MacBookPro4,1, BootROM MBP41.00C1.B03, 2 processors, Intel Core 2 Duo, 2.5 GHz, 4 GB, SMC 1.27f3
Graphics: NVIDIA GeForce 8600M GT, GeForce 8600M GT, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR2 SDRAM, 667 MHz, 0x7F7FBAFFFFFFFFFF, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
Memory Module: BANK 1/DIMM1, 2 GB, DDR2 SDRAM, 667 MHz, 0x7F7FBAFFFFFFFFFF, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C), Broadcom BCM43xx 1.0 (5.10.131.36.16)
Bluetooth: Version 4.1.4f2 12041, 2 service, 18 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST500LT012-9WS142, 500.11 GB
Parallel ATA Device: HL-DT-ST DVDRW GSA-S10N
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x1a100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x820f, 0x1a110000 / 4
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd400000 / 2
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0230, 0x5d200000 / 3
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x5d100000 / 2
Not sure how to interpret it, but I'm glad it's working now. Hopefully it will be fine!

Do I have bad ram or a bad ram slot?

I just tried to install 1gig of ram into my new 17" iSight. I can feel the ram "snap" into place so it is fully seated. However, the Mac still shows only 512mb of memory. Hardware Profiler shows the ram slot as Empty. I tried unseating and reseating the ram about 5 times with the same result.
I ran Apple Hardware Test and got the following error
post/0/2048
Without the ram installed AHT passes all tests.
I googled this error and saw many hits where people had a bad ram slot (not bad ram). So my question is, what happens when the ram is bad. Does it show the slot as empty. And if so, how can I tell the difference between bad ram and a bad slot on the motherboard? Is the AHT error for bad memory different?
Thanks all.

I went through the same thing. The slot was bad and they had to replace the motherboard. The Apple Care tech came to my home with the new mb on Friday. Two and one half hours from start to finish. This is a very complicated machine now. You have to go through the front of the machine to get to the mb. But after the new board all the memory is seen. And what a difference in performance!
BTW, the error message the AHT said was: Memory error on startup, 0/0/2048. Whatever that means.
Good luck.
Dan Reilly

PPC Dual 2.0 Ram/Ram slot problem

Hey there folks. I'm hoping someone has seen this before and can help me out. I've been having problems with RAM. It's a mix of bad ram and what I believe are bad ram slots. I've isolated the bad ram and removed it from the machine. With the good ram I have found that every other slot has a problem. If I put a pair of good ram in the Zero slots, it works fine. If I put them in the next slot they show has having a problem in the hardware test AND if I just let the machine boot, the ram will appear in the hardware profiler, BUT it will only post half its value. The machine will run fine for a bit, but then applications will vaporize, there will be eternal SWODs..etc etc .. making the machine unusable.
I've got a work-around for now. I just use the first and third slots and leave the second and fourth slots empty.
Any ideas on what the problem is? ... How to fix it?
Thanks very much for your input.
Cheers,
Jeff

yeah.. I don't think the Crucial memory will work in those slots either... I haven't tried, but all the ram that seems good and works as a stand-alone pair in the first and third slots, doesn'twork in the second and fourth... I'm much more suspicious of the motherboard/memory slots...

MacBook Ram slots - Which bank is which?

I installed two new RAM chips in my MacBook and one of the chips is faulty. I discovered that it was a RAM problem by switching the chips. In the first instance the good RAM showed up in Bank 0 and the second installation showed the good RAM was in Bank 1.
I have consulted the user manual but it does not say which RAM slot corresponds to what bank!
I don't want to take the chance of putting 1 chip in and ending up with no RAM. So, I need to know what slot is Bank 0 and what slot is Bank 1.
Hope someone can help!
MacBook Mac OS X (10.4.8) 13" (older model)

Thanks folks for your help! Here is the result of my findings:
1. When I chose the bad chip and 256MB chip, the MacBook would startup but the screen was black. So I knew I must have the bad chip installed.
2. When I chose the good chip and the 256MB chip, it booted and when I looked in the "About this Mac" it showed 1.25GB.
3. When looking in the battery compartment with the chip levers at the top, I put the 1GB chip in the slot on the LEFT. The System Profiler indicated that that was Bank1/Dimm1.
Briefly then - Bank 1 - left and Bank 0 -right when the levers are viewed at the top.

Fried RAM slot? Really need some help quick.

Hi guys. I have a major problem on my hands, that I hope you may be able to help me solve...
I have been working on a deadline for the production of a DVD that will be used as part of a mental health outreach program, and all had seemingly been going well, albeit slow with my OEM 512MB of RAM. I therefore decided to upgrade my RAM, first buying two 512MB DIMMS from macsolutuons, but these DIMMS produced crashes almost religiously after 5 or so minutes of uptime. After receiving a new shipment, ensuring they were from the same batch, all seemed to be well. The computer stayed up for days without crash - but when I put a load on it, namely video encoding to DV stream and to MPEG-2, poof - hard crashes.
I decided the RAM from macsolutions looked generic and suspected if I bought some real RAM I'd be safe. I purchased Viking RAM form macmall, three 512MB DIMMS, overnighted so I can make this deadline.
Here's the catch...
If I use all three DIMMS, the computer crashes in less than 5 minutes of uptime religiously. If I use two of them, the computer seems to stay up without problems, but when it sees a load like video conversion places on the system, it locks up. When I remove all RAM, so only one 512MB DIMM is present, I can encode video, and I don't seem to get crashes.
When I bought the machine from Apple some two years ago, it came with one 512MB DIMM. I'm only hypothesizing here, but is there a chance that I received a machine that has a RAM slot 1 that's fine, but there's something wrong with slot 2 (or even 2, 3, 4)? In theory, when just surfing or using standard apps, the first slot meets the RAM need, but when more RAM allocation is needed under hard processes, and the system feeds off of slots beyond #1, then I crash. MenuMeters is installed so I can monitor RAM use, and sure enough, I mainly get crashes as my used RAM approaches 480-500MB.
It's really urgent that I get to the bottom of this issue sooner than later, so I can finish this project to meet my deadline. Assuming slot 2 and so forth are bad, could I use a single 1GB DIMM module?
Any advice is greatly appreciated. If i can repay the favor in any way, I'd be glad to.

I suspected the RAM as well, however when I use only one DIMM I get zero crashes. I have used each of the three DIMMS for one day each now, and no crashes, but the second I add another ino the configuration crashes occur. While I agree that cheap RAM is often the culprit, to me all signs point to a faulty slot 2.
I think I'll try getting a 1G RAM DIMM and only use slot 1 and see how that goes. Too bad, because I could really use more than 1G.

Help with ram slots on MSI P7N SLI PLATINUM

rig config:
MSI P7N SLI PLATINUM (MS-7380)
bios version: 1.3v
Q6600 quard core 2.66GHz
Zotac modded 9800GTX+ amped version
2x2 Gb DDR2 800MHz Kingston
500 watt (absolute) power supply (taken form an old HP workstation)
windows 7 X64
Everything's on stock setting
Its been almost 1 & 1/2 years since i bought this rig, and from first month itself i have been having problem with the ram. The problem is not with the sticks, its with the ram slots. There are different things that happen. Sometimes when i boot my system:
1) either, it wont start, i.e. no boot screen.
2) It will load upto windows startup screen, crash and restart in an infinite loop.
3) It will load windows, then crash after sometime.
4) If i run any memory diagnostic, it will give errors.
At these times, i take out my 2 ram sticks, tinker with them, place them in different combination of ram slots, try push them in, in a certain way, keep trying until it yields and it boots up again ( generally a process of 1/2 an hr to an hr). After this my system will work fine ( no errors on any memory diagnostic) and boot properly for a week or 2, maybe even a month, but then again the same problem happens. I know for sure that there is no problem with my dimms (have checked them in other system and they work fine), its something to do with ram slots, or memory bus-controller structure.
Recently the problem happened again, though my tinkering didn't help. My system only boots up if i place any of the ram sticks in the 3rd slot (the 1st orange one). It wont work for any other slot and neither will it work if i place both of the sticks together. I have tried resetting my bios as well cmos settings, but it has not helped. My mb is still in warranty, but if i give it for repair, it will be gone for a good month or so, which doesn't go well with me. If someone has any suggestions, or a way out, it will be highly appreciated. Please help!

Quote from: nellinil on 10-July-10, 10:27:51
yes the psu has a single +12v rail with 21A rating, but somehow i don't feel the problem is because of it. When my system successfully boots, it works properly. I can play or work on high performance softwares for any number of hours without fail, which ought not to happen if the psu is bad.
Hmm, you are ignoring the possibility that your PSU is "flaky" (that's a technical term)!!!! You've never had any gizmo where "sometimes it works and sometimes it doesn't work"?
If you don't want to buy a new PSU then at least beg-borrow-steal another one and see if your symptoms change.

15-F018ca upgrade/ram slots

I want to upgrade the ram. I've tried to replace the only user accessible ram module under the laptop by a same spec 8gb module (but from Crucial) and it refuse to boot. Tried with a few other DDR3 and DDR3L (4gb and 2gb) but the only one that work and boot the laptop is the original one (samsung 4gb-pc3-12800).
Two questions: In the user manual and on vendor website they all list as two user accessible ram slot. In the bios/boot/utility tool it mentionned that slot/2 is empty. So where is it ? (have to disassemble the laptop to access it?)
And what memory is known to be a good compatibility for this serie of laptop ? (if a second slot is available 4gb+4gb configuration will suffice but if not what 8gb module is compatible?)
This question was solved.
View Solution.

Hi,
The manula clearly says on page #1:
Two SODIMM non-customer-accessible/upgradable memory module slots (Core i3 processors)
DDR3L-1600-MHz dual channel support (DDR3L-1600 dual channel support)
One SODIMM non-customer-accessible/upgradable memory module slot (Pentium, Celeron processors)
DDR3L-1333-MHz dual channel support (DDR3L-1600 downgraded to DDR3L-1333)
DDR3L-1066-MHz dual channel support (DDR3L-1600 downgraded to DDR3L-1066)
Supports up to 4 GB max system memory (DDR3L-1600MHz module)
Supports the following system RAM configurations:
● 4096 MB (4096 MB×1 or 2048 MB×2)
● 2048 MB (2048 MB×1)
Your machine uses "2.16GHz Intel Celeron N2840 Processor with Turbo Boost Technology up to 2.58GHz" that means only one slot and already max 4Gb that whay it says non-customer-accessible/upgradable memory
Specs: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c04475860&cc=be&dlc=en&lc=ru
Manual #1 of the following link:
http://h10025.www1.hp.com/ewfrf/wc/manualCategory?cc=us&lc=en&product=7499117
Regards.
BH
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Lenovo G580 2nd Ram slot broken

My laptop was preinstalled with 4gb and recently I brought a new 4gb ram to add to the computer but as I inserted it in the 2nd slot it still detects it as 4gb. I tried numerous times and also tried swapping them to find out and I know it isn't the new ram because Windows detects it on 1st slot but it's only when I put a ram in the 2nd slot that it has errors. My Windows is 64 bit so it should be able to use more memory. I don't know whether it could be the snap-in or something is wrong with the memory in the hardware. Could I get this fixed from a store or some remedy to get it to read?
http://i58.tinypic.com/2u43t3m.jpg
http://i60.tinypic.com/ao86zb.jpg
Solved!
Go to Solution.

Nevermind everyone. I feel so stupid right now. Turns out after hours of messing around with the ram slot I forgot that I needed to actually push down the ram into the slot rather than just inserting into place. I solved the problem myself so it turns out it wasn't a bad slot after all.

Powerbook G4 15in 1.5GHz Dead Lower Ram Slot

My Powerbook G4 has a bad lower Ram slot, but the problem is intermittant. If I put both 512mb ram in and start up, sometimes I get the 3 beebs and sometimes it will boot and show a full 1gb ram but locks up moments later.
I've been running on 512mb and it is not fun!
I can not afford a new logic board or a new mac. I am a web designer and need my PB for work.
How can Apple not Recall these machines and fix them?

Did the 2 RAM modules come with your Mac? Have you tried swapping the RAM modules to opposite slots and do you get the same failure in that slot? Make sure the modules are securely connected in the slot.
To eliminate RAM modules being the problem, Look at this link: Testing RAM @ http://guides.macrumors.com/Testing_RAM Then download & use Memtest & Ramber.
Do you have an Apple Hardware Test disc (the AHT is on the Install/Restore DVD that came with your Mac)? Running the Apple Hardware Test in Loop Mode is an excellent troubleshooting step for finding intermittent hardware problems. It is especially useful when troubleshooting intermittent kernel panics. If Loop Mode is supported by the version of the Apple Hardware Test you are using, you run the Extended Test in Loop Mode by pressing Control-L before starting the test. Looping On should appear in the right window. Then click the Extended Test button.The test will run continuously until a problem is found. If a problem is found, the test will cease to loop, indicating the problem it found. If the test fails, be sure to write down the exact message associated with the failure.In some cases, RAM problems did not show up until nearly 40 loops, so give it a good run.
 Cheers, Tom

Second RAM slot bad?

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