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DDR2 RAM at 1066MHz (EPP Enabled), System becomes unstable.

Hi,

Below is my system configuration:
Processor: AMD Phenom II X4 940
Mainboard: MSI DKA790GX Platinum (AM2+)
RAM: Transcend aXe DDR2 1066, 2x2GB modules.
Graphics Card: XFX Radeon HD4850, 512 MB DDR3.
HDD: 1TB, 250GB Samsung SATAII Drives.
OS: Windows XP Pro 32-bit SP2.

I am getting Blue Screen of Death frequently after some days of RAM purchase. I received memory `Memory Management` Blue screen and several others. My computer takes reboot in the middle of games, programs and when Windows comes up it generates message `The system has recovered from a serious error`. The system also got slowed.

Tried the followings:
1. Reinstalled OS, Games.
2. Repaired Graphics card, TV card driver.
3. I ran "Windows Memory Diagnostic" to know the health of RAM modules.

In the BIOS System Information:

AMD Phenom(tm) II X4 940 Processor
CPUID/Microcode 100F42/086
CPU Frequency 3.0GHz (200x15)
BIOS Version V1.7 03312009
Physical Memory 6657MB
Cache Size 2048KB
L3 Cache Size 6144KB

BIOS Cell Menu -> Advanced DRAM Configuration

EPP Technology Support [Enabled]
EPP support should be enabled in order to make the memories work at 1066MHz.

WMD test results:

Test Status:

Pass Test Cache
1 MATS+ On Succeeded
1 INVC On Succeeded
1 LRAND On Failed
1 Stride6 On Failed
1 WMATS+ On Succeeded
1 WINVC On Succeeded

System Memory Map
------------------------------------------------------
[00001000 - 00020000]
[00030000 - 0009fc00]
[00100000 - 00400000]
[004de000 - cff9e000]

Following errors were found:

Results Pass Test Cache Address Expected Actual
1 1 LRAND On 3057ae44 4b06dba8 4b06db88
2 1 LRAND On 74066644 121fc379 131fc379
3 1 LRAND On 39afe644 dede7f52 dede7f72
4 1 LRAND On 315e1f44 b4c65cc6 b4c65cc7
5 1 Stride6 On A71f381c 00000000 00000020
6 1 Stride6 On 0777884c 00000000 01000000
7 1 Stride6 On 12264a4c 00000000 04000000
8 1 Stride6 On 0c739004 ffffffff ffffffdf
9 1 Stride6 On 121f2a04 ffffffff feffffff
10 1 Stride6 On 4cb6a004 ffffffff feffffff
11 1 Stride6 On 353b8a44 ffffffff ffffffbf
12 1 Stride6 On 8c961204 ffffffff dfffffff
13 1 Stride6 On A4163a1c ffffffff feffffff

I have seen the error report on per memory module basis in WDM and found errors on both modules.

Note: EPP is disabled, RAMs work in 800MHz. WMD checks run without reporting any error. Ran for 6 pass cycles and got no error report.

[RAMs are in unganged mode. ]

System runs without any error when at 800MHz (EPP disabled). When EPP is enabled RAM voltage is at 2.0V which is normal.

What might be the cause of the issue?? And what might be the resolution?
48 answers Last reply Best Answer
More about ddr2 1066mhz enabled system unstable
  1. enayet_redeemer said:
    Hi,

    Below is my system configuration:
    Processor: AMD Phenom II X4 940
    Mainboard: MSI DKA790GX Platinum (AM2+)
    RAM: Transcend aXe DDR2 1066, 2x2GB modules.
    Graphics Card: XFX Radeon HD4850, 512 MB DDR3.
    HDD: 1TB, 250GB Samsung SATAII Drives.
    OS: Windows XP Pro 32-bit SP2.

    I am getting Blue Screen of Death frequently after some days of RAM purchase. I received memory `Memory Management` Blue screen and several others. My computer takes reboot in the middle of games, programs and when Windows comes up it generates message `The system has recovered from a serious error`. The system also got slowed.

    Tried the followings:
    1. Reinstalled OS, Games.
    2. Repaired Graphics card, TV card driver.
    3. I ran "Windows Memory Diagnostic" to know the health of RAM modules.

    In the BIOS System Information:

    AMD Phenom(tm) II X4 940 Processor
    CPUID/Microcode 100F42/086
    CPU Frequency 3.0GHz (200x15)
    BIOS Version V1.7 03312009
    Physical Memory 6657MB
    Cache Size 2048KB
    L3 Cache Size 6144KB

    BIOS Cell Menu -> Advanced DRAM Configuration

    EPP Technology Support [Enabled]
    EPP support should be enabled in order to make the memories work at 1066MHz.

    WMD test results:

    Test Status:

    Pass Test Cache
    1 MATS+ On Succeeded
    1 INVC On Succeeded
    1 LRAND On Failed
    1 Stride6 On Failed
    1 WMATS+ On Succeeded
    1 WINVC On Succeeded

    System Memory Map
    ------------------------------------------------------
    [00001000 - 00020000]
    [00030000 - 0009fc00]
    [00100000 - 00400000]
    [004de000 - cff9e000]

    Following errors were found:

    Results Pass Test Cache Address Expected Actual
    1 1 LRAND On 3057ae44 4b06dba8 4b06db88
    2 1 LRAND On 74066644 121fc379 131fc379
    3 1 LRAND On 39afe644 dede7f52 dede7f72
    4 1 LRAND On 315e1f44 b4c65cc6 b4c65cc7
    5 1 Stride6 On A71f381c 00000000 00000020
    6 1 Stride6 On 0777884c 00000000 01000000
    7 1 Stride6 On 12264a4c 00000000 04000000
    8 1 Stride6 On 0c739004 ffffffff ffffffdf
    9 1 Stride6 On 121f2a04 ffffffff feffffff
    10 1 Stride6 On 4cb6a004 ffffffff feffffff
    11 1 Stride6 On 353b8a44 ffffffff ffffffbf
    12 1 Stride6 On 8c961204 ffffffff dfffffff
    13 1 Stride6 On A4163a1c ffffffff feffffff

    I have seen the error report on per memory module basis in WDM and found errors on both modules.

    Note: EPP is disabled, RAMs work in 800MHz. WMD checks run without reporting any error. Ran for 6 pass cycles and got no error report.

    [RAMs are in unganged mode. ]

    System runs without any error when at 800MHz (EPP disabled). When EPP is enabled RAM voltage is at 2.0V which is normal.

    What might be the cause of the issue?? And what might be the resolution?


    It seems that the tables are not with the proper spacing to understand the readings though I apllied duirng writting to the post. To see the table with proper spacing just click on add a reply to enayet_redeemer link just at the bottom right of my post.

    Thanks.
  2. Best answer
    I would manually up the ram voltage a little bit(up to lets say 2.1v) to see if it helps, if it doesnt i would probably RMA the ram.
  3. You mention 2 x 2GB RAM, but seem to have 8GBs in the system. What's the other RAM?
  4. turn off EPP its not needed manually set the ram timings..

    dont use their generic may work epp crap.

    also how are you getting the memory to run at 1066 what are you changing in bios.


    are all 4 memory chips the same?
  5. MaDMagik said:
    I would manually up the ram voltage a little bit(up to lets say 2.1v) to see if it helps, if it doesnt i would probably RMA the ram.


    I have adjusted the RAM voltage to 2.1V by AMD Overdrive. Lets see what happens to the system in a day or two. Thanks for your suggestion.
  6. Mongox said:
    You mention 2 x 2GB RAM, but seem to have 8GBs in the system. What's the other RAM?


    I have a total of 4GBs of RAM (2x2GB) installed in my system. But the BIOS shows almost 6.5GB RAM in the System Information. I don't know what really is the cause of that. I have asked Transcend for that, waiting for their response.
  7. It's interesting, because you ran this diagnostic from a DOS boot diskette? Shouldn't show anything you don't really have, such as harddrive space allocated as RAM thru a swap file, etc...

    I downloaded it and am going to try it.
  8. rand_79 said:
    turn off EPP its not needed manually set the ram timings..

    dont use their generic may work epp crap.

    also how are you getting the memory to run at 1066 what are you changing in bios.


    are all 4 memory chips the same?


    I am getting the memory to run at 1066MHz by setting EPP Technology Support to "Enabled" in the BIOS. If it "Disabled" then the RAMs work at 800MHz.

    2 Memory modules are installed and I bought those in the same 4GB package (2x2GB in a single Box.).

    I have increased the memory voltage from 2.0 to 2.1. Lets see if the system becomes stable or not. If not then I will go for manual time setting.
  9. OK, the info you're getting showing over 6GBs of RAM you list as "In the BIOS System Information: " must include the Virtual RAM - clearly it's not from MS's memory tester.

    I would set all memory items in your BIOS to Auto - let it run as 800 for now to test it. Good starting point is to load the Optimized Defaults for BIOS if you have that choice. Clear any settings which are overclocking, etc...

    Test it that way and then try getting it to run up to speed and changing timings.
  10. Mongox said:
    OK, the info you're getting showing over 6GBs of RAM you list as "In the BIOS System Information: " must include the Virtual RAM - clearly it's not from MS's memory tester.

    I would set all memory items in your BIOS to Auto - let it run as 800 for now to test it. Good starting point is to load the Optimized Defaults for BIOS if you have that choice. Clear any settings which are overclocking, etc...

    Test it that way and then try getting it to run up to speed and changing timings.


    Hi,

    Thanks for your time for testing in your own system and reply back to me. :-)

    It was in the BIOS "System Information" in which total amount of memory showing as 6.5GB not in the WMD. I have written to MSI Technical Support and they suggested updating the BIOS to the latest version. Lets see what happens after the update.

    If RAM timing is set to 800MHz then the system runs without any issue. I have tested that several times. But when the timing is set to 1066 then problem starts.
  11. How can BIOS shows Virtual RAM?? I am familier to Virtual RAM (or are you trying to say Virtual Memory in Windows??).
  12. I do not see how the BIOS can show Virtual memory/RAM - which is hard drive space used to simulate RAM. Only a Windows utility will show it. But I also don't know of a BIOS function which would give the info you show - or how such info could be sent to a printer or file to duplicate it here....
  13. I'd flash my BIOS to the latest version to see if that resolves the 6.5 issue and maybe the 1066 issue. Failing that I'd RMA the RAM.

    You should be able to put the RAM in, select EPP, and be away laughing on stock settings (e.g. no overclocked CPU). Any less and their product did not meet the advertised performance, so should be returned.

    If you've overclocked your FSB to 400 and relying on the motherboard to clock the RAM at 533 then this could be your issue - it certainly is on my cheap Asrock board (once you hit 400Mhz, its 1:1 or crash heaven).

    If you're not o/cing then try the RAM in someone elses PC if you can, it's good to try that before doing an RMA (if it's necessary).
  14. enayet_redeemer said:
    I have written to MSI Technical Support and they suggested updating the BIOS to the latest version. Lets see what happens after the update.

    If RAM timing is set to 800MHz then the system runs without any issue. I have tested that several times. But when the timing is set to 1066 then problem starts.


    Make sure if you update the BIOS: 1)backup current BIOS first. 2)don't use Windows utility, update from BIOS or floppy routine only. 3)triple check to make sure you have right/compatible BIOS update.
  15. I have updated the BIOS from 1.7 to 1.96. Enabled EPP. RAM is at 1066MHz. Also updated my OS to Service Pack 3. After the updates I got the following BSoDs:

    BAD_POOL_CALLER (The cause I found is: After SP upgrade it sometimes shows)
    DRIVER_IRQL_NOT_LESS_OR_EQUAL (One of the main reason is after upgrading SP)
    PFN_LIST_CORRUPT (Might be hardware problem, not sure)

    But these days I not getting any BSoD. Hope BIOS upgarde has resolved the issue.
  16. I am still getting BSoD (PFN_LIST_CORRUPT, DRIVER_IRQL_NOT_LESS_OR_EQUAL) when running at 1066MHz though very rare. I wrote MSI regarding the issue and they want to simulate by building system like mine (e.g: Installing Transcend RAM, Processor, Mainboard etc.). Lets see what happens???
  17. I also had the Kingston Hyper-X RAM running DDR2 1066MHz. When I set in BIOS to 1066MHz settings, the program PC Alert appears shows the problem of the voltage in red negative. -0.067V.
    I changed my PSU from 450W to 700W, still had the same problem.
    At 1st, I thought the problem is with the program, that's what my senior technician said. So, he asked me to try PC Wizard 2008. After benchmarking, they only said I was running at 800MHz instead of 1066MHz. I am currently using W7 Ulti X86 RTM.
    May I know how can I run at 1066MHz correctly?? I am currently running 4x 2GB Hyper-X DDR2 1066MHz Ram.
  18. UchihaItachi said:
    I also had the Kingston Hyper-X RAM running DDR2 1066MHz. When I set in BIOS to 1066MHz settings, the program PC Alert appears shows the problem of the voltage in red negative. -0.067V.
    I changed my PSU from 450W to 700W, still had the same problem.
    At 1st, I thought the problem is with the program, that's what my senior technician said. So, he asked me to try PC Wizard 2008. After benchmarking, they only said I was running at 800MHz instead of 1066MHz. I am currently using W7 Ulti X86 RTM.
    May I know how can I run at 1066MHz correctly?? I am currently running 4x 2GB Hyper-X DDR2 1066MHz Ram.


    I have gone through the datasheet of Hyper-X and it seems that you have to enable EPP Technology Support from your mainboard BIOS. Download CPU-Z and run it, under the SPD tab you'll see "Timings Table". If your RAM supports EPP then you'll find "EPP#1" and frequency 533MHz (DDR2- 2x533=1066MHz). To check if your RAM is running at 1066MHz timing click on Memory tab of CPU-Z and you'll find DRAM Frequency@533MHz. If your RAM is running@800MHz then DRAM Frequency will be 400MHz.

    As you have the same mainboard (MS-7550) to enable EPP support do the following: Start your system-->Continue to Press F2 when the BIOS info appears--> Open Cell Menu in the CMOS Setup Utility-->Check whether anything like "EPP technology Support" is available (It could be in Memory-Z or DRAM configuration if the BIOS is old)--> Change the status of "EPP technology Support" to [Enabled]. It will make your RAM work at 1066MHz.

    To check the voltage of RAM it would be better to install AMD Overdrive Utility (Latest one). Install it and check your RAM voltage (2.2V is required to work@1066MHz as per the datasheet). Run AMD Overdrive click on the "Performance Control" tab and see the value of "Memory VDDQ". If the voltage is not@2.2V then you can increase memory voltage by dragging up the slide of "Memory VDDQ" to 2.2V. Save the settings and see the output of CPU-Z.

    Hope it helps.
  19. i can't find EPP at all....even at BIOS setup, DRAM config or memory-Z.
    But at the top of the memory-Z page, they already told me i am running at 1066MHz. cause I set the timing to 12-x-x something...maximum....
    but in windows, only shows i run at DDR2 800MHz....i am confusing at this...
  20. UchihaItachi said:
    i can't find EPP at all....even at BIOS setup, DRAM config or memory-Z.
    But at the top of the memory-Z page, they already told me i am running at 1066MHz. cause I set the timing to 12-x-x something...maximum....
    but in windows, only shows i run at DDR2 800MHz....i am confusing at this...


    Did you run CPU-Z? Please inform me about the output you get as I mentioned in the previous post.

    Also I have seen a review of Hyper-X memory where CPU-Z shows 400MHz (800MHz effective) timing of the memory.
    http://www.techwarelabs.com/reviews/memory/kingston-ddr2-1066/
  21. UchihaItachi said:


    Could you please send the window of memory tab in CPU-Z?

    And from the text information it seems that your memory is correctly running@1066MHz (2*533MHz). So why bother??

  22. is this enough?
  23. UchihaItachi said:


    Sorry, I couldn't see the picture. When I entered into the link it shows account cancelled.
  24. erm, how to upload picture here?
  25. UchihaItachi said:
    erm, how to upload picture here?


    Just write the data shown in the memory as well as SPD tabs of CPU-Z.
  26. memory:
    DRAM Freq: 533.4MHz
    FSB DRAM: 3:8
    CL: 5.0Clocks
    tRCD&tRP: 7Clocks
    tRAS: 24Clocks
    tRC: 31Clocks
    CR: 2T
    NB Freq: 1800.1MHz
    DC: Unganged
    Channel: Dual Channel
    Type/Size: DDR2 8GB

    SPD Slot1-4:
    Type/Size: DDR2 2GB
    Max Bandwith: PC-6400 (400MHz)
    Correction: NONE
    Part/Serial: PnC
    Week/Year: 18/09
  27. Not to be a pain, but are you 100% sure it's Transcend Axe DDR2-1066 and not DDR2-800??
  28. mine is not transcent axe
    mine is kingston hyper-X series
  29. Ahhh apologies for the confusion.
  30. UchihaItachi said:
    memory:
    DRAM Freq: 533.4MHz
    FSB DRAM: 3:8
    CL: 5.0Clocks
    tRCD&tRP: 7Clocks
    tRAS: 24Clocks
    tRC: 31Clocks
    CR: 2T
    NB Freq: 1800.1MHz
    DC: Unganged
    Channel: Dual Channel
    Type/Size: DDR2 8GB

    SPD Slot1-4:
    Type/Size: DDR2 2GB
    Max Bandwith: PC-6400 (400MHz)
    Correction: NONE
    Part/Serial: PnC
    Week/Year: 18/09


    From the information it is sure that your RAMs are working at 1066MHz. So, no worries. :)
  31. ok, thx
  32. Clock cycles are odd though 5-7-7-24?
    I run 5-5-5-15.
  33. SpidersWeb said:
    Not to be a pain, but are you 100% sure it's Transcend Axe DDR2-1066 and not DDR2-800??


    Yes, my RAMs are Transcend aXe DDR2-1066. EPP should be enabled to get it work @1066MHz.
  34. i see, so means there is no need EPP for kingston hyper-x.....
    anyway, which 1 is better?? transcend axe, kingston hyper-x, OCZ, corsiar??
  35. SpidersWeb said:
    Clock cycles are odd though 5-7-7-24?
    I run 5-5-5-15.


    I agree. I have just gone through the datasheet of Kingston Hyper-X DDR2-1066 RAM. There clock cycles mentioned as 5-5-5-15 @2.2V and 1066MHz.
  36. then hw mine run 5-7-7-24??
  37. UchihaItachi said:
    i see, so means there is no need EPP for kingston hyper-x.....
    anyway, which 1 is better?? transcend axe, kingston hyper-x, OCZ, corsiar??


    All DDR2s at the same clock level give almost similar performance. There might be some differences between the clock cycles. It also depends on the availibility, warranty policy and of course, price.

    There are numorous benchmarks on RAMs. You can read those and could have ideas. But you can think that yours is the better one ;)
  38. UchihaItachi said:
    then hw mine run 5-7-7-24??


    I am not sure. Let me gather some information regarding this. Also you can write to Kingston Technical Support regarding the status.
  39. hmm
    in CPU-Z written i am using 1066MHz
    but my friend recommended me use pc wiz 2008 or everest
    but those 2 show i am only using 800MHz
    these are the programs making me confuse...
  40. UchihaItachi said:
    hmm
    in CPU-Z written i am using 1066MHz
    but my friend recommended me use pc wiz 2008 or everest
    but those 2 show i am only using 800MHz
    these are the programs making me confuse...


    What does the mainboard BIOS shows? If it shows 1066MHz then your RAM is operating at 1066. CPU-Z gathers informations from the BIOS as far I know. You can check it by underclocking your RAM and it will get reflected in CPU-Z.
  41. ok
  42. Your memory is calling itself PC-6400 (DDR2-800) rather than PC-8500 (DDR2-1066) which is why some programs will be reporting it incorrectly. When CPU-Z says '533Mhz' this is an actual reading though, so it is definately running at DDR2-1066 speed (just with unusual latencies).

    I use Corsair XMS2 Dominator, and its embedded info tells programs PC-8500.
    That's why I asked if you were sure it's DDR2-1066.
  43. If u said PC6400 is 800MHz, then I should be running it, but my clock shows doesn't run at 800MHz
    I am confuse here. My BIOS shows I am running 1066MHz too...
  44. You are running 1066. That is a definate.

    I was just finding it odd that the RAM identifies itself as PC-6400.
  45. ok, thanks
  46. The cause of my issue was the BIOS and voltage of RAM. When my RAM was running @1066MHz the system became unstable and crash happened. I contacted MSI technical support for the issue and I updated the BIOS two times and increased RAM voltage from 2.0V to 2.1V and Also graphics card driver was upgraded to Catalyst 9.10.. After BIOS upgrade and increasing of voltage I not facing any crashes, hangs or BSoD for some days.....

    I think the main reason of my problem was BIOS compatibity of 1066MHz DDR2 and voltage and might be of driver. :ange:
  47. SpidersWeb said:
    You are running 1066. That is a definate.

    I was just finding it odd that the RAM identifies itself as PC-6400.



    No, that appears to be fine. I have OCZ Plats DDR2-1066 sticks which also reports max. bandwidth 6400 (400 MHz) under CPU-Z.
    There is a certain incompatibility between OCZ regular Plats 1066 Mhz sticks and AMD Phenom II CPU. When incompatible RAM modules were used, PC crashed often with BSOD's. I replaced them under RMA and OCZ sent me special AMD Phenom II CPU compatible RAM series. On these series, which BTW work very well and without crashes, the EPP option is disabled and does not report in either BIOS or CPU-Z program.
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