x38 ds5 Q6600 oc to 3GHz suddenly unstable :( - HELP?

Cybenjin

Cybenjin

Cybenjin

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Joined
21 Feb 2008
Posts
3
Location
London UK
Hi guys, Im new here. I'm semi-experienced at pc building and recently tried my first oc with the help of a friend.

we managed to get my system happily stable at 3GHz where it stayed for a week or so, temps were all fine in the mid 40s under load. i didn't bother pushing it further as this was more than fine for my needs.

after about a week i turned on the pc and it boot cycled once, then i noticed it had reset the bios settings to standard.

now i can't seem to oc at all... i have even tried underclocking the fsb and it won't work!!

I can't even seem to get the right latency settings on my memory now.

I have tried a few different setups and basic oc's... even trying the sticky post suggestions for oc'ing a Ds4/ds6

the only thing that seems to work is changing voltages, although whats the point if the system doesn't need it on stock right? any changes to frequency seem to cause the system to not post, then reset previous safe settings.

my system:
gygabite x38-ds5 flashed to Bios F5
Q6600 SLACR 95W with Zalman CNPS9500-AT CPU Cooler
Crucial Ballistix Tracer 2GB (2x1GB) 1066
BFG GeForce 8800 GTS OC 512MB
OcUK Ageia PhysX Accelerator
X-Fi Fatal1ty
Thermaltake ToughPower 850W Modular PSU


please... if anyone has any ideas or has experienced anything similar i'd be very grateful for any advice!

Ben
 
If it were me, I'd reseat the ram, vid card, recheck all your connections, maybe even check if the heatsink and fan is making good contact and reseat that, reset the cmos and check all the options are correct, time/date
, etc, disable "usb legacy support", raise the DDR voltage to "+0.3" volts, leave everything at stock, boot into windows, and run orthos or prime95 to stress the system. If it fails, remove one ram stick and try again, if it fails again, remove the other ramstick and run orthos again, that'll see if your ram is ok. Sounds like it could be your memory failing, I believe crucial memory isn't the most reliable from what I've read here.
post back with the results.:)
 
I'll give some of those a try cheers... good idea about the memory! In a way i hope it is that. at least i'll know where the problem lies. Will let you know the results.
 
One thing I have forund with these motherboards is they don't like lots voltage increase. My overclock was also going all over the place and this happened when I replaced me old psu, an enermax 485w noisetaker for a corsair 620w jobbie. Since installing it, I've had to drop me FSB and MCH voltages in the bios to barely over stock! I think this was down to the enermax not giving sufficient voltage to the those two components, so I had to compensate by giving more than what was required (like: 2v on the MCH was really 1.5v which was being supplied by the enermax.) when the corsair was used it'd deliver 2v if that is waht was set in the bios option, so it was overvolting.
The gist of this is try low volts at first and build up slowly, you never know.:)
 
HORAH! Problem solved :D I cannot believe how stupid this was...
As you suggested i tried a few things and it seems it may have been the "USB legacy support"! I unplugged the 500 external HD and turned that off... and now its running nice and stable (so far lol) at 3.2GHz (400fsbx8) allowing me that little extra from my ram too :D

Very happy now. Cannot thank you enough for your help.

... I'll be back on here when the next thing goes wrong or blows up! lol (fingers crossed thats not the case)
 
I dont know about these Gigabyte boards. They seem very touchy!!!

Had mine running at 3.6ghz, 450FSB, x8, FSBV+.2v, MCH +.2v, VCORE 1.4250 and was stable. In the morning PC went dead, power cycle it and then got it back up. Then gf phoned saying it keeps reseting!!!

Got home and set everything to default and then PC just kept power cycling before even posting!! Then BIOS seemed screwed. So pulled out all power, remove battery. Put all power back and still did not turn on???? So even at default it was dead...

Then it came back up. I disabled USB Legacy as advised on another forum. It's now working perfectly again as it was before. Very weird.

Read somewhere about enabling CIA to Turbo??? Tried that and Vista would not start?
 
oh no... it's not. It's turning off again!! Either not stable at 3.6ghz or PSU or this cr'appy board is a problem. Had this PSU on a AMD x2 3800 overclocked to 2.5ghz ande that was rock stable.

Probably this board....
 
How old is the psu mate?:) Since replacing mine, and going through bios slowly but steadily, I've had the pc benching orthos at 3.5ghz with fairly low voltages. I'm convinced these gigabyte X38 mobos don't like high voltages.
 
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