Clients rig, no longer stable.

Justintime

Justintime

Justintime

Soldato
Joined
24 Jul 2006
Posts
8,876
Location
Hoddesdon, London, UK
Built a rig for someone in March,

Asus P6T SE
920 @ 1.2875V 3.8Ghz, Ultra 120
12GB Gskill RipJaw
Radeon 4870
Audigy 2 ZS
OCZ Vertex LE i think 50GB
2X WD 1TB hdds

BIOS settings were:
Qpi - 1.3375v
Cpu 1.2875v
IOH 1.3v
ICH 1.3
CPU PLL 1.84v
Memory 1.62v 1600MHz a 7,8,7,18

I tested this with IBT 500 passes and 48hrs p95 blend, both checked fine and there were no complaints. Games fine etc..

However, i had the system back for some routine maintainence and before i give her back i just ran some stability tests to ensure everythings ok, it now fails IBT within an hour, bluescreen and reboot, prime passes fine.

Finally managed to so far get it back to some stability, all voltages are the same apart from QPI, which i have now set to 1.35v. Surely these voltages could not have degraded the chip? Any reason this might have happened? Its running over an 2hrs so far with IBT so hopefully this is it.. Going from experience, the original Qpi voltage might have been a bit on the low side especially with 12GB RAM at 1600mhz? Strange it went fine before though.
 
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you really don't need QPIv at 1.35; i can run 191x21 with a QPIv or 1.2, and vcore of 1.28.

ioh and ich don't need to be over 1.14 tbh, i only upped them to that as i have have multi-gpu and 6 hard disks and 2 ssd's.

i suspect having the QPIv that high on an air cooled system isn't going to end well... so it's quite possible you've damaged something.

what do you have uncore frequency set to? i need it on 17 or less for absolute stability.

just to let you know, i use 6 dimms for 9Gb of ram with those voltages mentioned.
 
QPI max is 1.35v AFAIK, as for the other voltages, they are the minimum needed to pass IBT and prime. QPI link speed is 3.6GHz. If i ran Qpi below 1.3375V (previously stable) it would BSOD within minutes of Prime or IBT, this was from new.
 
one thing we haven't looked at is temps - what sort of temps are you getting with the cores loaded? have you given the heatsink a good clean, and also what is the case ventilation like?
 
those are perfectly fine...

only other thing i can think of is possibly something on the system (software) that could be causing issues?
 
fair point, but it is computers (and you have given it to a woman to use :D)

you could try resetting the bios (note all appropriate settings) and reinput them, it could just be the bios being strange.

if that still yeilds the same results, try updating the bios maybe?
 
Well.. heres the odd thing.

BIOS was Feb 10.. upgraded to latest.

So far its been over 2 hours and 11 runs of IBT at

Qpi - 1.3v
Cpu 1.2875v
IOH 1.24v
ICH 1.3
CPU PLL 1.84v
Memory 1.62v 1600MHz a 7,8,7,18
LLC off

Forgot to mention psu is a Corsair HX620, i tested it with a TX650 as well with same results previously..

It'd reboot almost instantly with these settings previously.
Gonna see how this pans out lmao. Even if it dosen't pass all 100 tests its a start...
 
Would be interesting to see with that much RAM onboard if increasing the RAM voltage to 1.64 and loosening the timings down a bit would make it more stable?

Just while you have it in the workshop :)
 
If you can try running old settings with 6GB ram you will more then likley pass the test. 12GB of ram with a cpu o/c will put a lot of strain IMC and is dependent on the how good the chip to how far you can o/c with 12 gb. Dont worry about people telling not to run over 1.35 its fine as long ass you watch temps, i had a UD5 running 1.4 qpi for over a year and the XS lads run more on air.
Also bear in mind your doing this in the winter you need to account for summer temps when setting up a clients rig hope it helps
 
Essexraptor said:
Would be interesting to see with that much RAM onboard if increasing the RAM voltage to 1.64 and loosening the timings down a bit would make it more stable?

Just while you have it in the workshop :)
Click to expand...

It previously did 4.1Ghz with latencies set to cas 8, but vcore at 1.4v was getting too toasty, even 4Ghz needed 1.385v, also too toasty, had to run QPI at 1.4v, 1.385v min to get things even booting.

@BigAl, the temps never exceeded 77C on the hottest day in summer when it hit 30C indoors, just happen to have had it that day lol. Its currently 26C indoors with the heating cranked up, got my dad over and that dude is forever cold.
 
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