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Can't get good OC when I lock my PCI-Express speed setting

post #1 of 18
Thread Starter 
Without locking it (set at auto in the bios (default)), I can get to FSB230 and be stable. But I've heard not locking it is dangerous and I just can't afford to destroy my 7800GT... so I went in the bios and locked it but dang my computer wont boot at FSB 230! In fact, It won't boot with a FSB higher than 215!! I tried to raise voltage, timings, put a ratio with me mem speed... nothing helped.. Why is it doing so? Is it my value mobo's fault?

Plz, I'm out of idea...
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post #2 of 18
You should not run the Pci-e bus frequency greater than 110Mhz if you want that card to last long.......
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post #3 of 18
Yes you should normal keep it locked because the mobo will react to the overclocking and think that express has to go up to. So Me personally lock and don't overclock
    
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post #4 of 18
Thread Starter 
So does that mean I'll have to get another mobo if I want to get an OC past FSB 215???
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post #5 of 18
Hello again

If you are interested in overclocking your pc further, and there is definately no way to lock it in the bios i would suggest looking at a new motherboard.

If you are interested in doing this let us know as we can point you in the right direction
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post #6 of 18
Thread Starter 
Quote:
Originally Posted by MjrTom
Hello again

If you are interested in overclocking your pc further, and there is definately no way to lock it in the bios i would suggest looking at a new motherboard.

If you are interested in doing this let us know as we can point you in the right direction
Yes I can lock it, definitly. By default the PCI-Express speed setting is set to auto and my manual says to leave it at that (I assume it's under the assumption the user ain't ocing). But the problem is that I can't get past FSB 215 with it locked... when I can reach FSB 230 easily when it ain't blocked.

So if you guys think there's nothing that can be done to achieve an higher "safe" oc than FSB 215... I guess I should get a new mobo... no?

TBH I'm really starting to wonder if ocing is really worth it. I mean I spend SOOOOO much so far to get a decent overclock and look where I am right now! FSB 215 is the highest safe FSB I can reach... I spend like 65 for a Zalman7700 all copper, 30 bucks for fans, 60 bucks for a big typhoon, 200 bucks for good ocing memory, 120 bucks for a good ocing powersupply, 10 bucks for AS5... (and I can't count the hours I put in that rig installing all those things and messing with the bios... and I value my time A LOT) ! ***FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF Am I just crazy unlucky or is just ocing a stupid non rentable thing to do???
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post #7 of 18
Have a look at this review http://www.pcper.com/article.php?aid...e=expert&pid=6

could this be the problem?
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post #8 of 18
Thread Starter 
I doubt it... but I'll give it a try. Thanks for bringing this review to my attention. I'll get back to you in a couple of minutes.
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post #9 of 18
Thread Starter 
Nope, I booted at FSB 200 and then tried FSB 220 with PCI Express speed set at 100 but still wouldn't even post.

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post #10 of 18
What are the spd timings for your memory and what timings have you set them to?

what is the default voltage for your cpu and what voltage are you running it at?
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