Q6600 OC Errors (Please Help)

littledave · 29 Nov 2009 at 17:28

Thought id try to give my sons PC a new lease of life by OC

Whilst trying to OC and determine if its stable of not it seems im getting Prime95 Errors, within 1 minute.

FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress .txt file.

I reverted back to stock speeds and im still gettting the errors. Im currently running a memtest86 to check the memory.

I can get the temps to touch 55*c at full load.

Q6600 G0 SLACR (BX80562Q6600)
Abit IP35-Pro
G Skill 2x 2GB DDR2-400 F2-80000CL5-2GBPQ
Thermalright Ultra 120
Corsair HX650
Ati Sapphire HD5770
Seagate Barracuda 500GB SATA-II

littledave · 29 Nov 2009 at 19:26

Memtest has passed twice now with no errors, come on all you pro overclockers in here.

MadMatty · 29 Nov 2009 at 20:24

Reset the motherboard bios to optimised defaults and start from there. Need to have stable at stock before worrying about overclocking.

littledave · 29 Nov 2009 at 21:41

I havent really altered anything in the bios, but I will revert back to optomised defaults, then alter the basics like no A drive, and so on. Will post back

littledave · 30 Nov 2009 at 18:43

Ok I have loaded the 'load optimised defaults' and im still recieving errors on Prime95 where do i go from here?

mpj88 · 30 Nov 2009 at 19:00

try leaving it still at stock on the cpu and memory, and up some of the voltages cpu, nb, VDIMM etc. like said above you want to make sure everything is ok at stock before you try oc'ing

littledave · 30 Nov 2009 at 19:30

Have tried upping the voltages to 1.375 on the CPU and 2.1v on the ddr, Not to sure on how much to up the others but that made no effect.

Still errors with cpu 1.375 and ddr 2.1v the rest at stock.

Wish I never found this out as its going to bug me, sytems has been stable up until now as far is I knew

mpj88 · 30 Nov 2009 at 20:54

What value is your northbrige voltage and vtt? Picture of bios settings?

littledave · 1 Dec 2009 at 16:49

Heres some pics of the main bios settings.

buttkinz · 1 Dec 2009 at 20:24

try it with just one stick of ram in, then check each one, hopefully it might be a ram issue which is an easy fix

littledave · 1 Dec 2009 at 20:33

Will do spose it would be a good idea to move the sticks around too, and try different combinations. Shame I havent got any other ram to try

littledave · 2 Dec 2009 at 17:28

Ok it seems one of the 2gig sticks of ram is bad, when its in the system i get errors on prime95 no matter which slot, without the stick prime passes ok.

Just goes to show dont rely on memtest.

Going to have to sort an RMA out with G Skill now