X58A UD3R DMI Data pool

[Trinitrotoluene]

They are rated 7-7-7-20 though but I sure will try so in the morning to see what memtest does from coldboot.


8-8-8-24 1.66v QPI/VTT at 1.16v if I understand you correctly? Isn't that waaaay undervolted?

[Dark Mantis]

That's the recognised equation for the voltages but if it still doesn't work properly there is nothing stopping you stepping up the QPI/Vtt voltage a little. It just mustn't be more than 0.5V less. Let us know how it goes. The thinking behind the timings being slackened off is that if there was any discrepany in the ratings of the modules/chips it would give you a little headroom.

[Trinitrotoluene]

It just mustn't be more than 0.5V less? Please explain, I want to be sure here. RAM voltage set to 1.66v, QPI/VTT voltage should be in between X minimum and Y maximum. Please fill in  

And I am going to slack off the timings a bit to see if my modules are just broken on rated timings? As in, they are proper broken and RMA worthy if wanted.

[Dark Mantis]

The timings of 7-7-7-20 are quite tight and therefore if the QA on them was not as good as it should have been it could cause you trouble trying to run at those timings. So by loosening them off it just gives a little bit of space to play with. I suppose if the RAM was to work happily at the looser timings that would be grounds for having it replaced if it was purchased at a certain spec.

Yes set memory voltage to 1.66V and set QPI/Vtt to 1.16V (or a little more) but it should be ok at that. Offhand I am not sure of the maximum you can go to but you have already tried much higher than that.

[Trinitrotoluene]

Just did memtest coldboot 8-8-8-24 1.66v 1.20v QPI/VTT. Errors in test #4 so I stopped it. Put QIP/VTT to 1.260v, no errors, back to 1.200v, no errors.

http://img215.imageshack.us/img215/6987/20101105094933.jpg

[Dark Mantis]

Did you not try 1.16V for the QPI/Vtt setting for any particular reason?

What have you got your uncore set at. It should be twice the memory multiplier (and then you can add 1 or 2 if neccessary). For example if your memory multiplier was 10 then your uncore should be set to 20 (up to 22 max).

[Trinitrotoluene]

In that specific range I have the option to set 1.200v, 1.180v and 1.115v, I felt more comfortable with 1.200v since that also was the default value (although that probably just me). I guess from reading your post, I should be able to go as low as 1.180v now, so I have just corrected that. It's just that I think I was recommended elsewhere to stick between 1.2v and 1.35v

Uncore clock ratio was left on auto, I did read about keeping that in a certain line with the memory multiplier. But I don't think until now anyone mentioned it, not even OCZ. I have set it to 21x = 2800Mhz, memory multiplayer is at 10x = 1333Mhz. Not sure what the uncore auto setting did, might have been around 2600Mhz.

You think this might cause BSOD's and coldboot problemos? I just have a bad feeling about this, but obviously it's hard for me to stay objective


So right now, that's 1.66V ram voltage. CAS 8-8-8-24, QPI/VTT voltage 1.180, uncore clock ratio x21 = 2800Mhz. Memory multiplayer x10 = 1333Mhz

I take it if it runs unstable, as in memtest coldboot errors or BSOD, raise the QPI/VTT voltage. If stable then, set 7-7-7-20 again.

IF

[Dark Mantis]

Yes you seem to have understood properly and the settings look fine to me. Try them at that and see if you are more stable. You can alter the QPI/Vtt upwards a little if it gives you any benefit.

[Trinitrotoluene]

Just to check, because I'm getting different answers from different people (don't mean this forum).

Memtest coldboot is significant and should give no errors, no matter what? And in my case I can definitely use it to tell whether the memory is stable or not? It's easier to test than to wait for another BSOD as well.

[Dark Mantis]

Just to check are you using the beta version of Memtest86+ for the X58 chipset?

Although not infallible (what is?) Memtest is very reliable and generally considered a standard for testing modules.

[Trinitrotoluene]

No, I'm on memtest 4.10. I suppose it would be wise to see what that beta says on coldboot compared to the 4.10 version. Let alone a normal run after the PC has been running for some time.

[Dark Mantis]

If you only get the faults when on a cold boot then the chances are it is a bad chip on one of the memory modules that is working better as it heats up. It doesn't happen often but is known.

[Trinitrotoluene]

I would say 9 out of 10 times so far it shows errors on coldboot, no matter what setting. Also, straight after any BSOD memtest also shows errors, most of the time. In between those two points, it seems to be fine. Hence my 16 hour run that was OK. It really is a bummer, since this is my 2nd kit and I'm fearing the worst, obviously lol.

Could you link me the X58 memtest beta please? For sake of completeness, I'd like to try it.

[Dark Mantis]

I think that it is highly likely than that if all your settings are correct the problem is a bad module.(obviously you would have to replace the whole kit)

It would appear that it is no longer in beta stage and is now part of the final release.
http://www.memtest.org/#downiso

[Trinitrotoluene]

Hmm yes, I think so too. On the other hand, being without RAM again gives me the chance to return the PSU as well (coil whine topic if you remember) and replace it with, I'm thinking, Antec Quattro 850W. So there's still something positive to it.

Hopefully OCZ will have enough info come to a conclusion soon. Lets say 3rd time's a charm, it would be ridiculous to receive a 3rd broken kit.
 So memtest 4.10 should be fine for X58 as well. if anything progresses, I'll update this.