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RAM isntability - Page 2

post #11 of 21
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post
Have you tried testing with HyperPi 32M to see if it's the RAM?
It might be something else. It also depends how you fail, i.e. if 0x124 BSOD, definitely CPU.
the CPU is only @3.6ghz and enough voltage. and i really doubt its anything else than the ram because it already was impossible with my old ram to reach certain clocks...

Quote:
Originally Posted by djk11 View Post
The best test for RAM I've found is HCI Memtest. Take your total available RAM and divide it up across how ever many threads your CPU has. So for a Quad core with 5600MB RAM available run 4 instances of HCI Memtest with 1400MB RAM per instance. If there are big memory problems it will error right away, for long term stability testing I let it run till it passes 10,000% coverage with no errors to be sure.
ah right, i usually test with that app... errore occured in less than 1min... so my suspicion was correct.
thanks for reminding me of that software, gona see if i find a solution for that problem.
any suggestions other than increasing Vdimm?
will HT speed change anything when it comes to stability?
maybe some RAM drive strength adjustments help?

here some details about the current ram settings:
Vdimm: 1.70v (1.65v stock)
NB voltage: 1.20v
CPU-NB voltage: 1.50v (wanted to make sure that is not the problem... NB@2600mhz)
Vcore: 1.50v @3.6ghz (also to eliminate cpu fail)
all other voltages are stock.

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post #12 of 21
Overvolting RAM can cause errors, try HCI Memtest again at spec voltage 1.65v.

You can try loosening the RAM timings and test again for errors, something like 8-8-8-24
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post #13 of 21
Thread Starter 
Quote:
Originally Posted by djk11 View Post
Overvolting RAM can cause errors, try HCI Memtest again at spec voltage 1.65v.

You can try loosening the RAM timings and test again for errors, something like 8-8-8-24
already tried several settings and seems nothing that i set manual worked. so i set it to auto and so far there are no errors. if this will stay like this i will try to set it manually and see if that works.

here the auto settings, there are lots of timings which are lot tighter than i tried manually... that would once more confirm that stability is somewhat inversed and tighter = more stable...

Edited by kromar - 2/11/11 at 2:06pm
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post #14 of 21
Thread Starter 
just tried to set the exact same values manually and got instant errors with HCI... set it back to auto and lowered the Vdimm and its @ 5% now (2048mb each) and no errors...

can someone explain this other than there is a major bug in this BIOS?

i let it run for a while now and then i will try again with manual timings to see if it happens again. if its reproducible then there is definitely something wrong with the BIOS.
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post #15 of 21
1T/2T Command Rate make a difference? Usually needs to drop to 2T for large amounts of memory.

If auto is stable with no errors in HCI and you're happy with the performance then stick with it.
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post #16 of 21
Thread Starter 
got errors @ auto with 1.65v after about 20% (2048mb), will try 1.70 again...

well the confusing thing is that 1t has always been more stable here, as were tighter timings... probably the BIOS coders messed something up big time and thats why its not acting as expected and is so unstable.
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post #17 of 21
If you suspect BIOS could try clear CMOS and flash the BIOS. Are you running the latest one? Sometimes older versions OC better.
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post #18 of 21
Thread Starter 
older BIOS are not an option and the latest one neither because they are totally messed up, even the cpu multi is wrong there and is only adjustable by 1.0 instead of 0.5.

clearing CMOS does not help, i tried that several times in the past.
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myrig
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post #19 of 21
Thread Starter 
i flashed the latest BIOS and tried a RAM multi of x4 with auto timings to see if that would work and so far it gave no errors:O
tha bad thing is tha th CPU multi is only adjustable by x1.0 but if i might live with that if the ram is stable:O



now lets see if its still stable if i set these timings manually...
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post #20 of 21
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so i set them manually and it gave me errors as soon as i started the first test...

any thoughts on that? i will report this to GB and see what they have to say about that...

the only difference i see in CPUTweaker are the RfcT 2+3 on auto are on Reser. and manual on 110.
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myrig
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