DS4 can't pass 460 fsb?

[neiroatopelcc]

Hello. I've tried what I could to get a friend's system running faster, but had to give up in the end.
What am I doing wrong?

Firstly, here are his specs:
c2d e6400 /w zalman 9700
850w toughpower psu (or 820, don't remember)
2x1gb corsair PC2-8500 (cl5)
xfx 8800gtx
couple harddrives
All in a lanfire chassis

Secondly, here's what I've tried so far. 1) upping fsb and mch voltage by 0.1v 2) upping cpu voltage by 0.05v 3) setting cpu multiplier to 6 (to make sure it isn't the limiting factor) 4) locked the pcie speed to 100 7) set the vdimm to +0.3v 8) set the memory to slowest ratio.

At 445 it runs fine even with cpu at 7x multi and stock voltage, but at anything faster it doesn't pass prime, or doesn't boot. Above 460 the system will reset the bios to default, and sometimes it'll just turn off, wait a few secs, and turn on again. Quite wierd really.

In any event, I've got no idea why I can't get past 445 stable and 460 unstable. Do I have to feed the thing more voltage? or is the heatpipe system in need of more cooling? or do I have to turn something on/off ?


I've ofcourse disabled the fan and cpu speed regulatory tech.


ps. memory timings are read from spd ; no manual stuff done.

 

[flabbergasted]

I'm no expert, but I've used this overclocking guide to do the job. It's for the DS3 but I'd imagine it's basically the same for the DS series. Check out the other guides on their forum. I find this site very helpful.

 

[neiroatopelcc]

that guide isn't even running fsb 400 ; don't think that'll help me any bit.
but thanks anyway

 

[flabbergasted]

The point of the guide is to help you understand what to look for in bios when overclocking. I used it as a base to start from. But anyway if you want to see another guide TH has one here.

 

[neiroatopelcc]

That link doesn't work, but if it's the c2d overclock guide that's sticky somewhere else on this forum, I've already read it.

 

[jay2tall]

Could you list all your mobo setting that you have running stable and then unstable? So you have a e6400 running with a x6 multiplier? they are x8 stock, why not 400FSB and the X8 mutilpier for 3.2GHZ?

 

[neiroatopelcc]

I'm presently 160km away from the computer in question, and I don't recall anything much.
It was running 7x445 stable last time I checked. I was trying for a higher fsb to get the memory closer to their limit without getting over it. The memory are built to run 533 at cl5 after all. Would be a waste to have them run slower. I'll try with some active cooling on the northbridge next time I'm there though and see what happends when I up the fsb voltage.

 

[Pax2All]

...

 

[Pax2All]

I see the 8500 in your specs. You might have a Micron chip issue. Have you updated the bios?

 

[BUFF]

which DS4 - the P965 or 650i SLI?

 

[Pax2All]

DOH!!!!! I'm going to feel brilliant if its the 650i board. Good catch Buff

 

[BUFF]

there's a P35-DS4 now as well ...

 

[neiroatopelcc]

The board was a i965p one - rev 1.0
After updating to F9 bios it runs a lot better though, but still can't get stable past 460
Currently running 410x8 with mem multi at 2.5


ps. just ordered a p35 ds4 for myself yesterday - hope it gets here tomorrow