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No 3D pass 250Mhz of FSB

post #1 of 11
Thread Starter 
Hi!

I already posted a similar problem but I was using an Asus EN7800GT. Now I that I got my 2 XFX 7900GT I decided to give an other try but unfortunatly I had the same problem. Here's the problem:

whenever I go over 250Mhz, even if Memtest and Prime95 are 12hrs stable, of Fsb all my 3D apps freezes(games, bench...) I want to go to 250 and over because my memory is rated PC4000 so i want to use it at least at 500Mhz. There is a lot of thing that I tried With your help guys from my previous tread (thanks a lot BTW) here's a list of things that I haven't tried yet. Do you think that could make the difference:

- Run the cpu at 11x (250x11 = 2.75Ghz insted of 250x10 = 2.5Ghz)
- Use 2T command rate (memory is rated 1T at 500Mhz)
- Use a divider on the memory, drop the CPU multiplier and raise the FSB
- PegLink to fast (usualy disable also tried normal and auto) IMO PegLink SUCK BIG TIME Asus should remove that crap.:swearing: I'm shure that my problem come from that.

That's about it. Here the configuration i'm currently using 24h+ stable:
- 230 Fsb at 4x
- CPU at 11x
- Vcore 1.45
- 2.5-3-2-6 at 460Mhz
- Cpu loading temps of 52 ish! celcius full load.

thanks!
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post #2 of 11
I would say first off with stock cooling will cause some of that, because with the vcore set as it is will keep you from getting a stable overclock. get better cooling then increase your vcore a little.
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by jrabb1920
I would say first off with stock cooling will cause some of that, because with the vcore set as it is will keep you from getting a stable overclock. get better cooling then increase your vcore a little.

Does incresing my Vcore voltage will make my video to be more stable??? Because like I said in my previous post my overclock is stable at 250Fsb but I'm not able to have video Over a FSB of 245Mhz the video wont work even with a 9x CPU multi...

Could the memory cause the video not to work, even if it is 10h+ stable with memtest86...?
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post #4 of 11
I agree, make sure you disable peg link mode. The only beef I have with the board. Also those load temps are pretty high. That board will go much higher and I don't think you video cards have much to do with your issues. You have a solid power supply but cooling looks to be your biggest deficiency.
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post #5 of 11
Thread Starter 
Fine! I'll check to buy a new cooler. Wich one do you think is the best:

TT Big Typhoon or Zalman CNPS9500 LED ??

Hope it will fixes my problem...

BTW: I always leaves PEG LINK disable because if it is not I have a lot of artefac!!!
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post #6 of 11
i like em both both but I believe the Typhoon is slightly better (and its cheaper as well). The 9500 looks nicer in a case but looks aren't everything (coming from a guy that just painted the interior of his thermaltake armor and has 7 led fans!)
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post #7 of 11
Thread Starter 
ok ok....

I just ordered A TT BigTyphoon and a Delta ffb1212vhe 120mm fan wich blows 150CFM insted of the 54CFM fan that comes with the TT BT. So with that fan monted on the Big Typhoon I think i'll be able to have somme nice temps even with a 1.55V VCore... So i'll post back when I'll receive all that stuff, install it and tri the overclock. Hope that's gonna fix the problem ( I doubt it will but at least i'm gonna have lower temps wich is always good )
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post #8 of 11
Be sure the PCI-E frequency is locked at somewhere between 100-105.
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post #9 of 11
Quote:
Originally Posted by Mr-P
ok ok....

I just ordered A TT BigTyphoon and a Delta ffb1212vhe 120mm fan wich blows 150CFM insted of the 54CFM fan that comes with the TT BT. So with that fan monted on the Big Typhoon I think i'll be able to have somme nice temps even with a 1.55V VCore... So i'll post back when I'll receive all that stuff, install it and tri the overclock. Hope that's gonna fix the problem ( I doubt it will but at least i'm gonna have lower temps wich is always good )
Did you order earmuffs?
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post #10 of 11
Thread Starter 
Quote:
Originally Posted by sccr64472
Did you order earmuffs?
lolol!

I know that these fan make a lot of noise and I mean a LOT! Something around 60db, but sound doesn't bother me because I always wear my headphone when I'm at the computer. I also order a fan controler wich could be useful when not asking that much to the PC. But I must admit that they arent what we can call ''silent'' fan and also I really liked your comment


And Busa, yes the PCI-e frequencies is locked, I tried from 100 (default) to 105 and it doesn't change a thing....?
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