Vista x64 and 4GB memory issue.
Here is a link to my previous post with links to Microsoft Hotfix and background details re this known 4GB memory issue.
http://www.xtremesystems.org/forums/...5&postcount=22
Read the latest posts on this thread as things may have moved on since I posted - there may be a later hotfix! I never needed it as when I switched to crucial ballistix and a P5K MB I never encountered any issues.
Orthos/Prime95 large FFTs unstable
I have a very strange problem. Initially I thought it's memory but now i think maybe it's the motherboard.
Memory is Crucial Ballistix PC2-8500 rated 5-5-5-15
e6600 OC to 3.3GHz
FSB 367
memory 1:1 = 734
Vcore 1.4875
vMemory 2.2
Vdimm 1.4
vMCH 1.6
All CPU options disabled.
SPD enabled, timing set at 5-5-5-18
Orthos/Prime95 25.3 Small FFTs stable for more than 5 hours. But Large FFTs almost always failed at around 1 hour plus 50 minutes. If I lowered the vMemory it failed more early.
Since it is rated at PC2-8500 how come it is difficult to run it at 734MHz? The strange thing is that when not OCing, that is , CPU at 2.4GHz, FSB 266. Then I can jump the memory to 1065MHz and it was stable for several hours in large FFTs. So it seems to be that this motherboard has problem working this memory at 1:1 or hig FSB? When FSB is 367, if I set the memory to higher than 734 (not 1:1 ratio) then it failed more frequently. That is, at FSB 367, the highest memory speed I can get is 734, and it is NOT stable. But when FSB of 266 I can run memory at 1065MHz although it's not 1:1. Well I might be too strict as at FSB367, memory 734, it ran memtest86+ more than four hours no problem. The problem I found is the error at both Orthos and Prime95. Should I worry?
I tried to move memory to slot 1, 3 to slot 2, 4, nothing happened.
Should I replace the memory? BTW the memory module cannot be recognized by my another board ASUS P5K-E but it appear to at least working to some extent in my P5W DH Deluxe.
Comment is welcome. Thanks!