Mac Pro slow write speed on Samsung SSD drive

Hi,
I am wondering why I get very slow write speeds on my Samsung SSD 840 Series 250 GB system startup drive in my Mac Pro (early 2008).
I get an average write speed of approx. 35 MB/s and not much more for top speed. I tested it by transfering a large file (8GB, .m4v) from my Mac Pro internal Raid 0 (4x 2TB Stripe Set) delivering up to 550 MB/s. The read speed of the SSD is around 270 MB/s which I consider to be OK for that I have just the 3 Gb/s internal SATA interfaces in my pretty outdated Mac Pro.
I don't see any Memory or CPU overruns or consuming system tasks while doing the tests and no other user programs except Activity Monitor is running. The following screen shots from the Activity Monitor should proove my findings:
Setup:
Samsung SSD 840 Series 250 GB (SATA 6Gb/s and 3Gb/s compatible) system startup drive. Free Space left on SSD is around 100GB of 250GB.
Mac Pro (early 2008, Model 3,1), 2 x 2.8 GHz Quad-Core Intel Xeon, 8 GB RAM, NVIDIA GeForce 8800 GT 512 MB.
OS X Mavericks 10.9.1
Samsung sais there should be 540 MB/s for Seq. Read and 250 MB/s for Seq. Write for their SSD drive.
Any hints what could be done to increase especially that low write speed of around 35 MB/s (average) on the SSD in my Mac Pro?

Really great 'The hatter' !!!
Thanks a lot for your exceptional support.
Next to my 4x discs in the 4 SATA II drive bays I have installed a additional OWC drive kit that allows me to have another 2 disks sitting in the empty bay below the CD/DVD drive and those are connected to the motherboard. So there is a lot to handle for that controller you mentionned ;-)
I will follow your guidance and boot from my 'maintenance' system on direct attached external drive, install the TRIM Enabler there as well and do the DU repair run. I always have a separate system available that gives me the chance to boot my Mac from there. And in addition I regularly use ONYX to keep my OS X clean and do the maintenance.
Anyway, you're the man of the day!
PS; I am looking forward to finally receive my new Mac Pro (late 2013) ordered on the 18th of December one of these days and then I hope that I can fly ;-)

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Hi dschamis
Just out of interest, what application did you use to clone from your HDD to the OWC SSD?
I had the same problem, but I was using only one SSD, when I cloned from a VelociRaptor 300GB HDD to an OCZ Agility EX SSD in December 2009.
The SSD "bricked", and when I contacted OCZ they told me that they did not recommend cloning from a HDD to a SSD. In fact they definitely advised against doing so.
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NAWAF65095 wrote:
ok
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Best Regard.
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Intel-based Macs: Resetting the System Management Controller (SMC)
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Model Information:
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Manufacturer:          SMP
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PCB Lot Code:          0000
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If you have more than one user account, these instructions must be carried out as an administrator.
Launch the Console application in any of the following ways:
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Hello Everyone,
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~/Library
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hi Daew,
Welcome to the Lenovo Forums.
The results that you got while running CrystalDiskMark is normal. The SATA 2 (3Gb/s) that you mentioned is actually the SATA interface support, not the actual read/write performance.
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Mac Pro slow down after Yosemite 10.10.2 upgrade

Upgraded in January.
I get the spinning color wheel all the time. Programs crash.
I've run adware medic a few times, and etrecheck.
First run through, adware found Genio.
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I reset SMS and PRAM.
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Etrecheck report:
Hardware Overview:
Model Name:    Mac Pro
Model Identifier:    MacPro5,1
Processor Name:    Quad-Core Intel Xeon
Processor Speed:    2.4 GHz
Number of Processors:    2
Total Number of Cores:    8
L2 Cache (per Core):    256 KB
L3 Cache (per Processor):    12 MB
Memory:    20 GB
Processor Interconnect Speed:    5.86 GT/s
Boot ROM Version:    MP51.007F.B03
SMC Version (system):    1.39f11
SMC Version (processor tray):    1.39f11
Serial Number (system):    YM12403QEUF
Serial Number (processor tray):    J512102JZBH8C
Hardware UUID:    331ADEF9-7672-54D4-B314-6CC9510F23F1
EtreCheck version: 2.1.8 (121)
Report generated March 26, 2015 at 2:21:54 PM CDT
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Click the [Adware! - Remove] links for help removing adware.
Hardware Information: ℹ️
    Mac Pro (Mid 2010) (Technical Specifications)
    Mac Pro - model: MacPro5,1
    2 2.4 GHz Quad-Core Intel Xeon CPU: 8-core
    20 GB RAM Upgradeable
        DIMM 1
            4 GB DDR3 ECC 1066 MHz ok
        DIMM 2
            4 GB DDR3 ECC 1066 MHz ok
        DIMM 3
            1 GB DDR3 ECC 1066 MHz ok
        DIMM 4
            1 GB DDR3 ECC 1066 MHz ok
        DIMM 5
            4 GB DDR3 ECC 1066 MHz ok
        DIMM 6
            4 GB DDR3 ECC 1066 MHz ok
        DIMM 7
            1 GB DDR3 ECC 1066 MHz ok
        DIMM 8
            1 GB DDR3 ECC 1066 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en2: 802.11 a/b/g/n
Video Information: ℹ️
    ATI Radeon HD 5770 - VRAM: 1024 MB
        HP 2711 1920 x 1080 @ 60 Hz
        HP 2711 1920 x 1080 @ 60 Hz
System Software: ℹ️
    OS X 10.10.2 (14C1514) - Time since boot: 4:30:37
Disk Information: ℹ️
    HL-DT-ST DVD-RW GH61N
    WDC WD1001FALS-41Y6A1 disk0 : (1 TB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 999.35 GB (365.24 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information: ℹ️
    Seagate FreeAgent GoFlex 1.5 TB
        disk1s1 (disk1s1) <not mounted> : 32 KB
        Flux Capacitor (disk1s3) /Volumes/Flux Capacitor : 1.50 TB (880.50 GB free)
    EPSON EPSON Perfection V37/V370
    Logitech USB Receiver
    Apple, Inc. Keyboard Hub
        Apple, Inc Apple Keyboard
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
Gatekeeper: ℹ️
    Mac App Store and identified developers
Adware: ℹ️
    Geneio [Adware! - Remove]
Kernel Extensions: ℹ️
        /System/Library/Extensions
    [not loaded]    com.keyspan.iokit.usb.KeyspanUSAdriver (2.2) [Click for support]
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    [running]    com.adobe.AdobeCreativeCloud.plist [Click for support]
    [running]    com.extensis.FMCore.plist [Click for support]
    [loaded]    com.oracle.java.Java-Updater.plist [Click for support]
    [running]    com.teamviewer.teamviewer.plist [Click for support]
    [running]    com.teamviewer.teamviewer_desktop.plist [Click for support]
    [running]    com.wacom.wacomtablet.plist [Click for support]
    [running]    jp.co.canon.CUPSCMFP.BG.plist [Click for support]
    [running]    jp.co.canon.UFR2.BG.plist [Click for support]
Launch Daemons: ℹ️
    [running]    com.adobe.adobeupdatedaemon.plist [Click for support]
    [running]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [loaded]    com.barebones.authd.plist [Click for support]
    [loaded]    com.barebones.textwrangler.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
    [loaded]    com.oracle.java.JavaUpdateHelper.plist [Click for support]
    [loaded]    com.teamviewer.Helper.plist [Click for support]
    [running]    com.teamviewer.teamviewer_service.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
User Login Items: ℹ️
    AraxiVolume_HW25512-63_J    Volume Hidden (/Volumes/AraxiVolume_HW25512-63_J)
    AraxiTemp_HW25512-63_C    Volume Hidden (/Volumes/AraxiTemp_HW25512-63_C)
    JobNAS    Volume Hidden (/Volumes/JobNAS)
    Dropbox    Application (/Applications/Dropbox.app)
    Microsoft Outlook    Application (/Applications/Microsoft Office 2011/Microsoft Outlook.app)
Internet Plug-ins: ℹ️
    WacomNetscape: Version: 1.1.0-5 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 - SDK 10.7 [Click for support]
    WacomSafari: Version: 1.1.0-5 [Click for support]
    AdobeAAMDetect: Version: AdobeAAMDetect 2.0.0.0 - SDK 10.7 [Click for support]
    FlashPlayer-10.6: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    AdobePDFViewerNPAPI: Version: 11.0.10 - SDK 10.6 [Click for support]
    Flash Player: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    iPhotoPhotocast: Version: 7.0 - SDK 10.8
    SharePointBrowserPlugin: Version: 14.4.8 - SDK 10.6 [Click for support]
    AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Click for support]
    JavaAppletPlugin: Version: Java 8 Update 31 Check version
User internet Plug-ins: ℹ️
    Unity Web Player: Version: UnityPlayer version 2.6.1f3 [Click for support]
Safari Extensions: ℹ️
    AdBlock
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    WOT
    Firebug Lite for Safari
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
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Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
        12%    WindowServer
         3%    launchd
         2%    AdobeAcrobat
         1%    plugin-container
         1%    hidd
Top Processes by Memory: ℹ️
    966 MB    firefox
    537 MB    Adobe Illustrator
    494 MB    softwareupdated
    451 MB    Adobe Photoshop CC 2014
    301 MB    mds_stores
Virtual Memory Information: ℹ️
    3.78 GB    Free RAM
    10.89 GB    Active RAM
    5.13 GB    Inactive RAM
    1.65 GB    Wired RAM
    13.32 GB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Mar 26, 2015, 02:01:09 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/Adobe Illustrator_2015-03-26-140109_[redacted].crash
    Mar 26, 2015, 09:57:44 AM    /Library/Logs/DiagnosticReports/Microsoft Excel_2015-03-26-095744_[redacted].hang
    Mar 26, 2015, 09:57:43 AM    /Library/Logs/DiagnosticReports/AdobeAcrobat_2015-03-26-095743_[redacted].hang
    Mar 26, 2015, 09:46:15 AM    Self test - passed
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    Mar 26, 2015, 07:48:39 AM    /Library/Logs/DiagnosticReports/???_2015-03-26-074839_[redacted].cpu_resource.d iag [Click for details]
    Mar 26, 2015, 07:48:01 AM    /Library/Logs/DiagnosticReports/???_2015-03-26-074801_[redacted].cpu_resource.d iag [Click for details]
    Mar 26, 2015, 07:47:22 AM    /Library/Logs/DiagnosticReports/???_2015-03-26-074722_[redacted].cpu_resource.d iag [Click for details]
    Mar 26, 2015, 07:46:42 AM    /Library/Logs/DiagnosticReports/???_2015-03-26-074642_[redacted].cpu_resource.d iag [Click for details]
    Mar 26, 2015, 07:40:07 AM    /Library/Logs/DiagnosticReports/???_2015-03-26-074007_[redacted].cpu_resource.d iag [Click for details]
    Mar 26, 2015, 07:39:29 AM    /Library/Logs/DiagnosticReports/???_2015-03-26-073929_[redacted].cpu_resource.d iag [Click for details]
    Mar 26, 2015, 07:31:07 AM    /Library/Logs/DiagnosticReports/Adobe Photoshop CC 2014_2015-03-26-073107_[redacted].cpu_resource.diag [Click for details]
    Mar 26, 2015, 07:18:59 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/Adobe Photoshop CC 2014_2015-03-26-071859_[redacted].crash
    Mar 26, 2015, 07:08:28 AM    /Library/Logs/DiagnosticReports/mdworker32_2015-03-26-070828_[redacted].cpu_res ource.diag [Click for details]
    Mar 26, 2015, 06:52:15 AM    /Library/Logs/DiagnosticReports/mdworker32_2015-03-26-065215_[redacted].cpu_res ource.diag [Click for details]
    Mar 26, 2015, 06:28:11 AM    /Library/Logs/DiagnosticReports/mdworker32_2015-03-26-062811_[redacted].cpu_res ource.diag [Click for details]
    Mar 26, 2015, 06:27:33 AM    /Library/Logs/DiagnosticReports/mdworker32_2015-03-26-062733_[redacted].cpu_res ource.diag [Click for details]
    Mar 25, 2015, 09:19:55 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/Adobe Illustrator_2015-03-25-091955_[redacted].crash
    Mar 25, 2015, 05:40:16 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-03-25-05 4016_[redacted].crash
    Mar 24, 2015, 10:58:55 AM    /Library/Logs/DiagnosticReports/Adobe Illustrator_2015-03-24-105855_[redacted].cpu_resource.diag [Click for details]
    Mar 23, 2015, 04:52:41 PM    /Library/Logs/DiagnosticReports/Adobe Illustrator_2015-03-23-165241_[redacted].hang
    Mar 23, 2015, 04:46:35 PM    /Library/Logs/DiagnosticReports/Adobe Illustrator_2015-03-23-164635_[redacted].hang
    Mar 23, 2015, 04:45:23 PM    /Library/Logs/DiagnosticReports/Adobe Illustrator_2015-03-23-164523_[redacted].cpu_resource.diag [Click for details]
    Mar 23, 2015, 03:29:11 PM    /Library/Logs/DiagnosticReports/Canon Office Printer Utility_2015-03-23-152911_[redacted].hang

Malware – Adware removal – Apple Support
Activity Monitor - Mavericks also Yosemite
Activity Monitor in Mavericks has significant changes
Performance Guide
Why is my computer slow
Why your Mac runs slower than it should
Slow Mac After Mavericks
Things you can do to resolve slowdowns see post by Kappy

Mac Pro slows to a crawl performing routine tasks

I have an early dual 2.66 Dual-Core Xeon Mac Pro. For the last year or so, it's been plagued by very poor performance whenever anything of significance is going on. Some of the most blatant offenders are iTunes iPhone/iPad syncs, Time Machine backups, and certainly more strenuous things like Lightroom batch exports. Whenever something like that is going on, just opening Google in a new Safari window can take 5-10 seconds, along with beachballs, slow typing response, etc.
I've done two OS wipes hoping it was software-related, but that never helped. I've tried defragging, run extended hardware tests using the Apple tool and it found nothing. There's about 50GB of space left on my startup drive, but like I said, this happened on a new, clean install, so I'm sure it's not software. Even though there were no errors, I pulled all but two 2GB memory sticks and performance was still bad with just iTunes and Safari running during a sync. CPU usage is fairly nominal during these episodes, so it's not like something is pegging them. I have a Core Duo and Core 2 Duo MBP and they both run fine. It's not bleeding edge, but this Mac Pro shouldn't be worse than those two, and it is. I'm pretty convinced it's a hardware issue somewhere but I don't know where to go from here. Any suggestions?

I'm having the exact same problem, sluggish performance with nothing going on. I have iTunes running I'm typing in Text Edit and I get one or two words ahead of the cursor. I have to wait a few seconds for everything. Activity monitor shows no CPU hogs. I've looked into the problem being Spotlight indexing, cache files out of control, kotoeri input, any other obscure crevasse in the dark inner workings of this petulant beast I could think of. I've defragged, I've run unix maintenance scripts, repaired permissions (from Terminal, "Maybe it'll work better.") I've researched and investigated and tried everything I can think of. I'm at my wits end. Came here. This is the first confirmation I've had that I'm not insane and someone else has the same issue.
I know there have been some problems with the Radeon 2600, screen goes black and won't revive without holding one's tongue just the right way. Some have reported it eventually just not reviving. I wondered if that had something to do with things. Can't see how though. If I knew it would solve the issue for sure I'd drop the few hundred to relieve the torture, as it is I can't afford a few hundred for a "maybe."
I upgraded to Snow Leopard hoping it would resolve. At first it did. Now it's back. It comes and goes, sometimes I don't notice it, then it gets bad, then it's gone, then it gets really bad, I swear, it stays really bad, I swear some more. I have a 8-Core with 10GB of RAM and I can't use Text Edit without waiting for the cursor? Some thing is amiss.
I don't know that we'll find a solution, it seems so obscure, but misery loves company. I'll let you know if I discover a wonder fix, hoping you'll do the same.
Model Name: Mac Pro
Model Identifier: MacPro3,1
Processor Name: Quad-Core Intel Xeon
Processor Speed: 2.8 GHz
Number Of Processors: 2
Total Number Of Cores: 8
L2 Cache (per processor): 12 MB
Memory: 10 GB
Bus Speed: 1.6 GHz
Boot ROM Version: MP31.006C.B05
SMC Version (system): 1.25f4

Mac Pro slow start up

I got a problem with my Mac Pro 4.1, when I turn on the mac the chime sounds after 20 - 30 secs and later on the white or gray screen appears. I had reset the PRAM, changed the coin battery, tested with the "Apple Hardware Test" (no problem at all). I have 20Gb (4X4GB, 4X1GB) of Ram, five hard drives attached to it. I thought that the problem was the hard drive with the OSX (10.8.2), got changed with a new one with a new OSX on it, two hard drives of 2Tb with RAID "lvl 1", two hard drives of 640Gb. When my mac goes to sleep, sometimes when I try to wake it up I hear the sound that wokes up but got no image on display, so I have to force shut down and then turn it on again.
I try dettaching all the hard drives except the one that has the OSX, thought it might be problem of the RAID. I did experiment that my mac freezed and then restart.
Please someone help me with this problem!
Specs Mac Pro 4.1
- 2.26ghz x 2 "8 - core"
- 20gb ram (I recently upgraded my ram from 6Gb)
- 1Tb HDD
- 2Tb HDD x 2 (RAID 1)
- 640Gb HDD x 2
- NVIDIA GT 120 x 2
- OSX Mountain Lion 10.8.2
Sorry for my english that is not so good.

Snow Leopard seems to be the most solid OS.
SSDs can be iffy.
Anyone's RAM can cause or be a problem.
But you said it started before those.
"problem with the hard drive..." is too general and really rare. You would have to have bad sectors or something and not been able to map those out. Any drive can ship that way (not just mapped out at the factory). Zero all from Disk Utilty is not guarantee to resolve those.
Also rare to have a clone not work, SSDs being likely candidate and finiky.
Using Cloning as a Backup Strategy
Carbon Copy Cloner 3.4.1
http://www.bombich.com/software/updates/ccc-3.5.html
OS X Lion Install to Different Drive
How to create an OS X Lion installation disc MacFixIt
Migration Assistant Update for Mac OS X Snow Leopard
Mac OS X: Starting up in Safe Mode - http://docs.info.apple.com/article.html?artnum=107393
What is Safe Boot, Safe Mode? (Mac OS X) - http://support.apple.com/kb/HT1564
Safe Boot takes longer than normal startup - http://docs.info.apple.com/article.html?artnum=107394
Mac OS X 10.4, 10.5- Computer shuts down during Safe Boot - http://support.apple.com/kb/TA24054
If you don't have an installer disc available you can try effecting repairs using fsk in Single User Mode - http://docs.info.apple.com/article.html?artnum=106214.
Post by japamac about using fsk - http://discussions.apple.com/thread.jspa?threadID=1649143
Repairing permissions in Single User Mode - http://discussions.apple.com/message.jspa?messageID=7117122
Mac Running Slow: General Tips & Advice (Kappy)
https://discussions.apple.com/thread/4214422?

Mac Pro slow to connect to internet after waking

Since I upgraded to Lion my mid-2011 2.8 GHz Mac Pro takes about 10-15 seconds to connect to the internet. After waking from sleep in the past, I could launch my web browser and it was connected immediately. It is bad for my email. It is set to check every 2 minutes and I get a huge log of connection errors. I am using the ethernet port with a direct connect to the modem. I also have a wireless router for my MBP and it connects immediately through Airport. Why is my direct connect slower than Wi-Fi?

Sometimes if you set your Ethernet connection to Automatic, rather than specifying the speed you know it will connect at, it will spend several seconds re-negotiating speeds, duplex, flow control, etc with the connected equipment.
For fastest wake times, know what speed it will ultimately settle on, and set that as the speed it should use.
System preferences > Network > Ethernet > ( Advanced ) > Ethernet ...
set Manually: speed, duplex, and frames size.

Mac pro slows down after RAM uppgrade ASP (its my workstation)

I have an mac pro (first 8core released back in 2007) and i uppgraded it from 4 to 8 gig of ram. After the upgrade it became slower so I installed snow leopard since it should handle ram and multicores better but that didnt help. Its like it go from sleepy to extreme slow. Like an photoshop image that should take 12 seconds to load took 10min!! So its somethin fishy.
The old configration
DIMM Riser A/DIMM 1: 1 GB
DIMM Riser A/DIMM 2: 1 GB
DIMM Riser B/DIMM 1: 1 GB
DIMM Riser B/DIMM 2: 1 GB
DIMM Riser A/DIMM 3: 0 GB
DIMM Riser A/DIMM 4: 0 GB
DIMM Riser B/DIMM 3: 0 GB
DIMM Riser B/DIMM 4: 0 GB
The new uppgraded
DIMM Riser A/DIMM 1: 1 GB
DIMM Riser A/DIMM 2: 1 GB
DIMM Riser B/DIMM 1: 1 GB
DIMM Riser B/DIMM 2: 1 GB
DIMM Riser A/DIMM 3: 2 GB
DIMM Riser A/DIMM 4: 2 GB
DIMM Riser B/DIMM 3: 0 GB
DIMM Riser B/DIMM 4: 0 GB
Does 2007 have 4 memory chips as ideal as 2006 had? Can the macstore give me bad compatible rams (i asked for orginal mac ram memmorys). If this could make it go slow. Mabe snow leapord helped out to slow it down but I worked one and half day before I uppgraded to snow leopard and it was already slow.
This is on my worskstation so its Asp. Is there any heros here?
(ok I will test to take out the ram and se if everything goes back to normal but still I would like to get it to work)
Cheers
Joel

"need" is something that is "recommended" for symmetrical memory performance.
It shouldn't run any different really.
I always recommend this:
try with just the new RAM
put highest density in A1:A2
It is symmetrical, sort of, as 4x1GB in slots 1:2 on both Risers.
My take: doesn't play nice or get along with original 4GB; marginal; and ideal is 4 x 2GB; second best 8 x 1GB. 6 DIMMs is the worst configuration AFTER not having enough.
I'd wipe out your swap files; clone your drive - if you haven't done so in six months you should, also if moving to a new OS, DEFINITELY either
Clean install on new/2nd drive (great excuse for new fast drive);
Clone and then upgrade (worst scenerio)
Clean install followed by running Migration Assistant for everything except applications.
Don't want to have issues with new OS, new drivers, AND new hardware (even RAM) and a new OS isn't going to fix a problem, just add new ones. And TEST a new OS before you commit yourself (reason for backups and clones and the like).
Also, run Disk Warrior on fresh clone before you use it.
What you do, why, you probably did need more RAM, 4GB is pretty basic and not even enough for pro apps like graphic editing.
Watch RAM temps and run AHT Extended Loop briefly.
I'd watch for bad blocks and disk sectors; re-initialize drives, even install some new ones: WD 10K V-Raptor for system and another for scratch; Samsung 1TB F3 for data.... something like that if it has been 2+ yrs.

Mac Pro slow write speed on Samsung SSD drive

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