What causes ram to pass memtest booted from cd but not in Windows??

ed.howell · 03-01-2005, 05:50 AM

I am running into a problem. I can pass memtest booting from a cd with my OCZ PC4200El Platinum's 2.9volts 2.5-3-3-8 at 285FSB no problems, but I when I run Memtest in Windows, I am having trouble getting it to pass at between 270-275 with the same voltage and timings.

Why does this happen?
Also I have the DFI 875P-T mobo and it just has passive cooling on the NB, would putting active cooling on the NB help a lot? I am assuming it would but just want to make sure.

Thanks,

Ed

flexy · 03-01-2005, 01:31 PM

i didnt know you CAN run memtest from within windows ?

Its kind of pointless anyway....if it passes in bios...then boot into windows and run prime or occt. If you pass both then you're fine. (IMHO)

nebuchanezzar · 03-01-2005, 04:31 PM

Same reason Prime95 runs at higher speeds from disk(dos) than windows...windows sucks

...resources that is. As I understand since it uses x amount of memory thats usually the problem. One reason 2000 tends to bench better than XP..it uses less system memory to run.

bachus_anonym · 03-01-2005, 04:46 PM

Many times you will need to raise vdimm a bit ti get stabilty in MemTest for Windows as oposed to "normal" Memtest.
Besides, it's way better to test using Memtest for Windows. More reliable than just "booted-from-DOS" one. Once it passes e.g. 500-1000% you'll at least now that your memory is stable enough for some Prime95 action. That's how I do it... 2hrs of normal memtest, then 500% of Memtest for Windows (0 errors) and then Prime95 for at least 6hrs... Do it that way instead just depending on normal memtest alone...