Which DIMM slots for 6GB RAM upgrade

I am not sure if it makes any difference in a Santa Rosa macbook pro whether you put the 4GB RAM chip in the top DIMM slot or the bottom DIMM slot when upgrading to 6GB of RAM. I had heard that bigger chips must be configured properly in a mac pro to get optimal use of the RAM. I have looked all over for an answer for this and cannot find any information about this anywhere. Any help would be appreciated.

I have this same question. I have a late-2008 unibody MBP 15, and 6GB of RAM. However, I have observed some instability with 6GB (kernel panics). I'm not sure what to point the finger at. I ran memtest86 overnight without any errors. The memory is Corsair. So, I'm not even sure it's the memory causing the issues.
Most often the kernel panics are from the mdworker or Parallels processes -- both of which are notorious for causing kernel panics.
Anyway, I was also curious whether anyone else has speculation on "Slot 0" vs "Slot 1". So far, I've only run it in "Slot 1". Currently, I've yanked the 4GB DIMM from the MBP and am running back at 4GB (2x2GB).

Similar Messages

Set up virtual memory for 6gb ram

hi ,
can any one please tell me how to set the virtual memory custom size for 6GB ram?

Frederic,
Those rules of thumb stem from the era when is was common to have 2 or 4 GB of memory, but with memory in the range of 12, 16 or 24 GB, I think we can forget about that rule of thumb. I would use a rule of thumb that the sum of installed memory and pagefile need not exceed 32 GB. With disk space being so cheap there is no reason to skimp on pagefile size, but with increasing amounts of installed memory, the pagefile will be used less and less. The general rule that Windows applies would result in a pagefile of 36 GB on a 24 GB system and that is overdone IMO. On a 48 GB system, Windows suggests a whopping 72 GB pagefile! That makes no sense. So, on a 48 GB system even a 4 GB pagefile would likely not be used at all, but Windows requires one to be present, otherwise it will create one for you on C, which is dynamically allocated and that is worse than a fixed, static pagefile as the first file on another disk.
Of course, if you make it a habit to switch between AE, PR, Maya and other applications a lot and work on files with large pixel dimensions, the sum total can easily be increased to 48 GB.
My suggestion is to use common sense.

Should I buy the imac with expandable memory slot for future os upgrade size?

Should I buy the imac with expandable 8gb memory slot for future os upgrade size?

I Always try to have a little more RAM on my computers that I think I'll need when I purchase them. Either have more ram installed when you order the iMac or purchase one with open slots for upgrading.
I Purchase my iMac 5K with only 8 GB RAM but it had two open slots. As soon as I received the iMac I purchased two 8 GB modules form Other World Computeing. That brought my RAM to 24 GB. I run multiple applications and the iMac runs smoothly.

Best configuration for 6GB RAM

I've bought a Mac Pro with 2GB (4x512MB) and I want to extend the memory up to 6GB (4x1GB additional). What is the best configuration on both riser cards to get a maximum of performance?
Mac Pro 3GHz Mac OS X (10.4.8)

Each Riser has 4 DIMM slots. memory must be installed in identical pairs.
4 sets of DIMMs, 8 DIMMs maximum.
http://manuals.info.apple.com/en/MacProMemoryDIMMDIY.pdf
http://manuals.info.apple.com/en/MacPro_MemoryRiserCard-DIY.pdf
Mac Pro DIY Manuals

MBP 6GB Ram upgrade crashes computer

Hello,
I've recently upgraded my Macbook Pro with 6GB of ram (went from 2GB - 6GB).
Since the install, my computer quits programs and often gives me the black shut down screen.
Sometimes after the crash, the computer will beep and get stuck in the silver loading screen prior to boot up. Other times, it will take me to the log in screen just fine.
When I reinstall the two single GB ram, my computer doesn't have any problems (albeit less memory).
Activity Monitor doesn't show anything extreme, yet the computer crashes.
I've ran several tests, and everything seems to be installed correctly. What else can I do to figure out what the problem is and get my computer stable?
My computer:
Snow Leopard, 10.6.3
2.4 GHz Intel Core 2 Duo
6 GB 667 MHz DDR2 SDRAM
Mid Summer 2008 Model
Thanks in advance.

Test with one of the old 1GB modules and one of the new modules in place, then switch new modules and test with the other one in place. This may help you determine which of the new modules is bad. Or if you don't want to be bothered with time-consuming testing, just return both new modules for a refund or exchange.

Need Suggestions for 2GB Ram Upgrade

I am looking to upgrade my blackbook to 2GB or RAM for around $200...Please let me know any suggestions you may have along with links if possible. Thanks for your time...
-Eric

I strongly recommend OWC. Not only do they have excellent prices, but their parts are high quality and all guaranteed to work with mac products. Also, they have excellent videos to install any component.
I've ordered from them dozens of times in the past and they are simply the best in all aspects of the sale:
http://www.macsales.com/
Please remember to mark helpful/solved replies appropriately.

Which pcie slot for 8 lane card?

Hi,
my Caldigit card (for HDPro) is 8 lane.
Where do I put it? Slot 2 (pcie 2.0 - X16 lane) or slot 3 (pcie - X4 lane) ???
always appreciate your support

If it really needs 8 lane bandwidth, put it in slot 2. It should work in a 4 lane slot, though, since that is 1G Bytes per second each way, which is far more than any video requires. See the first paragraph after Figure 1 and the table just after Figure 2 of:
<http://developer.apple.com/documentation/Hardware/Conceptual/HWtechPCI/Articles/pciimplementation.html>

Which PCIe slot for gphx card?

Hey all:
I have had a problem with my mac pro 2006 rebooting spontaneously. I thought it must be the graphics card and finally pulled the graphics card out and left the mac pro on for a while to see if it would reboot. It didn't. It was solid. No graphics card = no problems, so I assumed it was the graphics card.
So, I decided to swap out my x1900 with a 4870. It's rebooting. I guess this has to do with power to the logic board or something. I have no idea, but I'm super frustrated since this thing isn't under warranty.
I decided to put the graphics card (the new 4870) in the 2nd to bottom PCI slot, rather than the bottom slot. I got a message on startup from the PCI Expansion Slot Utility: http://twitpic.com/2k2jeh
So, things seem to be stable (but I am not counting on it). Is my 4870 not running at full speed in the second slot? I'm not an expert in how the PCI slots are set up, and I'm trying to understand.
I decided to swap

I found this : http://support.apple.com/kb/HT2838
Slot two is 1x + 16x rather than "slot - one" which is just x16... so since slot two has that extra x1 I guess the 4870 cannot perform to its fullest, but pretty close?
I have a suspicion that something in the PCIe slot 1 chain may be broken?... like the power or something? I'm going to lower my fan speed down from 1800 RPM and see if it blows up. It probably will.
Anyone think I just need a new Power Supply, or maybe a new logic board?... how much do those things run? And if I call in on an unsupported system what sort of pricing is it for replacement parts like this? Bad?

K8N Diamond Plus. Which PCI slot for Adaptec 39320

Hi
I understand the Orange slot is not sharing resources with the other PCI slots.
Would this be best for my RAID card (its a 64bit RAID card going into a 32bit slot) or would it not work at all?
thanks
Charker

Charker,
You will have to contact MSI Tech Support on that one, that question has crossed my mind to whether that is a full function PCI slot or not. It is the only open PCI slot if you have a Graphics Card in the Secondary x16 slot. If it is full function PCI slot, the only thing I know of that stop you using your 64-bit Controller in it are two Caps that may get in the way of the card over hang.
Burmo,
You should know your subject before you make comments like that on the Forum. Most all PCI 64-bit I/O cards will auto sense the slot type they are plugged into and adjust the interface to fit the slot capabilities. Only problems using a 64-bit PCI card in a 32-bit PCI slot is you loss interface bandwidth and there maybe physical components mounted behind the 32-bit slot that will not allow the PCI 64-bit card to be inserted.
Luckily I have communicated with Charker enough, that I do not think you statement would have steed him wrong, but someone with a low level of computer knowledge, you could have cost him/her a lot of money. Those Controller cards he is talking about cost two or three times what the Diamond Plus motherboard costs. Next time research you answers before you make it, if you not sure and if you do not know do not comment.
Roger
When submitting a problem, include a complete list of your system components; include part numbers, all Power Supply Voltages, and their output ratings. It is almost impossible to estimate what your problem is without knowing something about it.

Which configuration of iMac 27" ? Fusion drive or not ? RAM upgrade ?

I'd love to get a new 27" iMac for my Mother, but cannot decide if the higher i7 processor (3.5) is worth the price, and cannot decide if the 3TB "Fusion" drive is worth the extra $350.
The retail Apple stores stock the i7 only with the 3TB Fusion drive, the better graphics card, and stock 8GB of RAM, but one can configure the machine if ordering on-line via the link below. Her husband will reimburse me or it will be a gift. Money is not the issue.... just whether or not the money is worth spending.
One last thing: The apple store rep said that the "Geniuses" have to do the RAM upgrade, say from 8GB to 32GB because the 21" unit has to be opened. So the consumer doing the RAM upgrade will void the warranty. Yet I see website indicating that the 21" has a nice convenient door to open and the RAM is user-upgradable without voiding the warranty. Which is true ?
Apple wants to charge $600 (parts and labor) for the RAM upgrade to 32GB. But Crucial has 32MB of this RAM for under $300 with a lifetime warranty. Is there a reason to use the RAM from Apple ?
LINK: http://store.apple.com/us/buy-mac/imac?product=ME089LL/A&step=config

1. 27" iMac with 3.4Ghz i7 and NVIDIA GeForce GT 775M with 2GB video memory is just $200 more than 27" iMac with 3.2Ghz i5 and NVIDIA GeForce GT 755M with 1GB video memory. How much is her time worth per hour? If it's for business use, it pays for itself quickly. Same opinion for the 'build-to-order' upgrades in speed and video available on the 27" i7.
2. Fusion drive is a hybrid combining 128GB SSD with either a 1TB or 3TB rotating platter hard drive.
Analysis and review of Fusion drive in a 2012 iMac: http://www.anandtech.com/show/6679/a-month-with-apples-fusion-drive
Conclusions and performance are on pages 5 and 6 of the review.
3. 27" iMac RAM is "user-replacable", quoting from the 2013 'Important Product Information' addendum to the manual:
"Do Not Make Repairs Yourself
Your iMac doesn’t have any user-serviceable parts, except for memory, which is user-replaceable in 27-inch models only. Do not attempt to open your iMac. If your iMac needs service, contact an Apple Authorized Service Provider or Apple for service.
If you open your iMac or install items other than memory in 27-inch models, you risk damaging your equipment. Such damage isn’t covered by the limited warranty on your iMac."
quoted from http://manuals.info.apple.com/MANUALS/1000/MA1662/en_US/imac_late2013_ipig.pdf
OWC video of the 27" RAM upgrade installation: http://eshop.macsales.com/installvideos/imac_27inch_late_2012_mem_m/
4. If it's for business, go for the i7 and the video upgrade.
5. I'd do the upgrade myself, purchasing from a reliable vendor of Apple RAM such as crucial.com or macsales.com. I have no experience with the other vendor you mentioned, RAMfinder.com. Factory-installed RAM offers the pricey convenience of having a machine configured by you online and shipped directly to your mother in a few days with no one else needing to be involved. I'd avoid any Apple salesperson who apparently doesn't know the 27" iMac product well enough to give you the truth about user-installable RAM upgrades. OWC (macsales.com) will purchase system-pull original RAM allowing you to recoup a small portion of the cost of the upgrade, though nothing close to the resale price of the RAM.
Message was edited by: kostby

K7n420 which memory slots?...

Hi,
I am a bit confused.
Till now i knew that after bios v2.2 and above the best combination for Dual DDR operation in the k7n420 (nforce) was 2 sticks of memory put in slots 1&2.
Recently, i have learned from lowrider that he is getting the best results with slots 1&3 occupied!!! ?( ...
Richard, what is going on here?
What is the official word of MSI about this matter?
I am running bios version 2.7 and am utilizing 2X512MB PC3200 memory sticks.
Thank You,
Manolis aka Markoul

Manolis,
With BIOS 2.7 it does not matter which Dimm Slots you use as long as you only use 2 sticks and they are matched. You will get Twinbank.
Several people have been testing their Memory Bandwidth and have found one combination to be a little better than the other 2 combinations. I would run Sandra on your board and see which combination gives you the best results with your RAM.
I would like to see your results too.
Richard

U310 RAM Upgradable? Voided Warranty?

Hi --
I am a tentative Lenovo buyer and was am set on getting the U310 Ultrabook. I do notice though that it only has 4 GB of RAM. I would ideally like to upgrade this upon getting the laptop. Is this possible? I have researched it and cannot find any answers for this particular model. I just do not want to buy the laptop and find out that it does not have an extra slot to upgrade the RAM so I am stuck with 4 gig. If this is the case, then I may just spring the extra $100 or so and get the U410 Ultrabook.
Secondly, will doing anything like this by myself void the warranty? I certainly would not like that to happen.
Let me know and if anyone has any advice on the U series; I'm hoping to buy today before this sale is over.
Thanks!

I just upgraded and wanted to share some notes. The quick answers are:
- Yes, opening the case voids the warranty (and needs to be done carefully)
- Yes, the machine can run 8GB of RAM
- and (bonus) you can use the mSATA SSD drive as a regular SSD drive--and upgrade it as well
The only potential hiccup is that you may need to flash BIOS version 65CN21WW for the RAM upgrade to work. Initially my machine would not boot or POST with the 8GB stick. After flashing this version things went smoothly (aside from needing to re-apply BIOS settings to get Windows 8 to boot again).
Here's more details:
- my machine is the non-touch screen i3 based system
- I used the Crucial memory advisor to locate the 8GB stick of RAM and a 240GB mSATA SSD
- There are useful YouTube videos showing how to remove the back panel. Basically you pry off the rubber feet, unscrew the 4 screws you'll find, then (VERY) carefully work your way around the space between the back panel and the silver plastic
For my dual-boot setup:
- Fully shutdown Windows (being sure not to use Intel Rapid Start--you want it to be a complete shutdown)
- In the BIOS disable IRST
- Switch the drives to AHCI mode in the BIOS (you'll need to reload Windows after doing this)
From there I installed Windows 8.1 to a 250GB partition on the 500GB spindle drive. Ubuntu GNOME 13.10 went on the entire SSD, with the other 250GB of the spindle drive available for slower-speed storage. With my increased storage I'll be considering if both OS's should reside on the SSD for performance, with extra storage on the larger drive.

P67 Blue Or Black Dimm Slots?

The question seems to come up often enough to open a thread about it. The manuals for the P67's are fairly clear on recommending using the blue dimm slots, & for the very first initial system startup, one stick in the primary blue dimm slot closest to the CPU. There has to be a specific reason for that, although I don't exactly know what it is. Some seem to find a need for a gigantic CPU cooler that covers the primary slot so as to make it unusable, & ask about populating the black slots instead. At first, I made the mistake of advising folks that the blue slots must be used or it wouldn't boot at all. Well, that is not true, as I tested it on my B2 & B3 board, & they booted just fine when the RAM is in the black slots. However, for the first initial startup, I did use the primary blue slot with only one stick of RAM in the system.
The other question comes up if a performance difference is noted using the black instead of the blue slots. Here again, on any given day or on someone else's system, the results may come out completely different, but in my tests, the blue won out, but barely, & I really mean barely. 9 passes of 3X runs each in both blue & black slots & under two different screen resolutions gave these results;
Blue slots FPS Average = 130.553
Black slots FPS Average = 130.056 for a rather miniscule advantage to the blue slots of a poultry 0.497 FPS
Max. Resolution with my LCD netted an even closer spread.
Blue slots FPS Average = 82.178
Black slots FPS Average = 82.150 for an even tighter difference of only 0.028 FPS favoring the blue!

Quote
What test were you using
Crysis Bench Tool. CPU 4.7, RAM 1600 CR 1 7 7 7 19 tRFC 50 @ 1.552v's.
Believe you were using a B2 board? That will be a great comparison when you get the B3 & run your tests again. Please feel free to post your results here. Knowledge is power!

Re: Satellite A660 - No boot after RAM upgrade

I have just gotten 8GB of RAM for my Satellite A660, it is Corsair CM3X4GSD1066 4GB PC-8500 (1066MHz) 204-pin SO-DIMM DDR3 RAM CL7.
The system posts fine and the 8GB is showing up in BIOS but once its clears post and goes to load Windows it stops on the black screen, the cursor flashes a few times then it stops. I have left it for about 5 minutes and it wont boot through.
Please Help.
I have replaced the 4GB sticks and it works fine.

Hello
For me it sounds like that the modules are not compatible or have defective sectors
As Akuma wrote, such performance modules are risky in notebook because you dont have any options to change the latency values as on desktop computers. So I always prefer Kingston modules for notebook RAM upgrade.
But before you buy other modules, try a BIOS update and load the default settings.

6GB RAM in MacBookPro ???

I clicked thru to Ramjet site (www.ramjet.com) and found their sales pitch for 6GB RAM in more recent MBP models. My Profile:
Hardware:
Hardware Overview:
Model Name: MacBook Pro
Model Identiﬁer: MacBookPro3,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.6 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 4 GB
Bus Speed: 800 MHz
Boot ROM Version: MBP31.0070.B07
SMC Version: 1.16f10
Sudden Motion Sensor:
State: Enabled
appears to meet what they claim as the requirements to properly run the 4/2=6 combination.
Has anyone else verified this in practice? I am newer to MAC so am not comfy with a sales site providing critical info. I run Vista under Parallels and MAC simultaniously all day with several programs always running under each, so the memory can't hurt (I assume). Guess this also introduces the question If Parallels will recognize & utilize the added RAM.
Sorry for length of post. Any advice sure is appreciated!
Kevin

Si I went ahead and ordered the 4GB RAM after the Apple tech said he had never heard of it, but what the heck, it's returnable. (BTW: Fri, 01.30.09 it was $199 on the Ramjet site, Wed, 02.03.09 it was $225, so watch prices!).
Installed the 4GB with the 2GB and the MacBook Pro recognized (and presumably is using) all 6GB. Further, I split the RAM with Vista under Parallels, and Vista recognizes 3GB when I set the split to 50/50.
So it does work!!!! And with 50% more RAM the performance of both sides should be improved.
Kevin

Which DIMM slots for 6GB RAM upgrade

Similar Messages

Maybe you are looking for