xtiger Posted October 11, 2006 Share Posted October 11, 2006 I recently built my first computer with an Asus P5B and 2Gb of Corsair TWIN2X2048-6400 and there were some stability problems with my system. The system randomly reboot. I ran Windows Memory Diagnostic and the memory (in dual channel set up) failed the ERAND test. Each individual module passed the test though. I also ran memtest but no errors were produced in the first 2 or 3 passes. I contacted the corsair tech support, and I was advised to adjust the DDR voltage to 2.1v in BIOS (default setting is AUTO). However this made things worse. So I adjusted the voltage to 1.8v (the lowest setting in my BIOS). The system now seems stable. I ran Windows Memory Diagnostic overnight and no error was produced. I am a novice in computers so here is something I don't quite understand. I thought that higher voltage would mean more stability, but apparently that's not the case? Can anyone explain to me? Here is my system configuration: Asus P5B Intel Core 2 Duo E6600 Corsair TWIN2X2048-6400 eVGA GeForce 7600 GT KO Antec Neo HE 430 Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted October 11, 2006 Corsair Employee Share Posted October 11, 2006 That might suggest a power problem, can you test the system with another PSU or test your modules in another system? Link to comment Share on other sites More sharing options...
xtiger Posted October 11, 2006 Author Share Posted October 11, 2006 Hi Ram Guy, Thanks for the the prompt reply. Unfortunately I don't have access to another PSU or system to test the modules at the moment. Could you explain to me why it might be a power problem? The modules failed the ERAND test in Windows Memory Diagnostic when the voltage was set to 1.9v, 2.0v or 2.1v. They passed the test only when the voltage was set to 1.8v. Should I worry about it much if the system is stable with this setting? Tiger Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted October 12, 2006 Corsair Employee Share Posted October 12, 2006 If changing the voltage will change the results of a memory test then its not the memory that’s generating the errors. If you have a failing module they will fail no matter what voltage or frequency or timings you have them set to and I would suggest http://www.memtest.org to test the system with it will be easier to determine what might be failing. Or I would suggest testing the modules in another system! Link to comment Share on other sites More sharing options...
mrbeige Posted November 15, 2006 Share Posted November 15, 2006 I have pretty much the same system including PSU and I get a reboot everytime i exit the bios. After a few attempts the system restarts with the message overclocking failed. Do we need to upgrade the PSU to 550w or similar? I am clueless with this stuff! Ben Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted November 15, 2006 Corsair Employee Share Posted November 15, 2006 I would suggest a PSU that provides a minimum of either one single 30AMP +12v rail or 2 16AMP +12v rails. Link to comment Share on other sites More sharing options...
mrbeige Posted November 16, 2006 Share Posted November 16, 2006 The HE 430 should cope with this i think. http://www.antec.com/specs/NeoHE430_spe.html Can you suggest any other solution to my boot up problem? Why does the system think I am trying to overclock? Thanks, Ben Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted November 16, 2006 Corsair Employee Share Posted November 16, 2006 Known issues with that PSU! Link to comment Share on other sites More sharing options...
mrbeige Posted November 18, 2006 Share Posted November 18, 2006 Thanks so far ram guy! The psu is fine, got the system up and running eventually by only using one module of the 1Gb 6400 ram. This had to go in the only dimm slot that seems to work on the board A2. Does this mean that the board has to go back? Would you suggest swapping the board for a different model/manufacturer? Many Thanks, Ben Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted November 20, 2006 Corsair Employee Share Posted November 20, 2006 Yea maybe, do you have the latest bios version? Link to comment Share on other sites More sharing options...
mrbeige Posted November 20, 2006 Share Posted November 20, 2006 Yeah updated that ok. Have you ever heard of the dimm slots failing because of the psu? Mail order MB so sending it back is a real last resort. Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted November 20, 2006 Corsair Employee Share Posted November 20, 2006 Please see if you have this setting and change ‘Write to Precharge delay’ in the BIOS (same page as for latencies) from default 10 to 15, and see if the system is more stable. Link to comment Share on other sites More sharing options...
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