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Increasing PCIe 100vs101?

post #1 of 15
Thread Starter 
Just wondering what benefits that overclocking the PCIe frequency will have on my PC?

It's currently at 100. I don't know if this means [Auto] or if it's locked at 100. I also don't really know what it will do if I increase it to 101.

I am using a R3E motherboard.
I have 2xGTX580s and my BCLK is 210x21 (4410MHz).

I'm currently stable but I'm working on my GPU overclock. Does anyone know if this will have any effect? Will it help my GPU core/shader OR will it help my GPU memory? Or both?
post #2 of 15
Here's a thread you might find relevant:
http://www.xtremesystems.org/forums/showthread.php?t=245301

TL,DR: Common consensus argues over whether it provides a performance gain, stability increase, or null change.
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post #3 of 15
Thread Starter 
It appears to me that's only really worth it if you can't get your BCLK past a certain point? Is this true or am I missing something?

Is there any GPU performance increase?
post #4 of 15
You get a little faster results but not much. I have to up mine to about 105 to get past 230 bclk with my overclocks. Then each time i go up, I then have to raise the pci-express lane speed up. But as long as you are shooting for about 220 -225 blck you should be fine at at default.
post #5 of 15
From personal experience I've never had any problems with the frequency at 101, and have in fact had instability when defaulting the clock (then again, there were other facts alongside). Regardless I highly recommend a value of 101, but I'm sure the difference between the two is mostly negligible.
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post #6 of 15
increase PCI-E helps increase BLCK you have to increase PCI-E in all instances to take BLCK over 220. You wont damage anything, but the GPU might stop responding over 105mhz. I can do upto 130 on a GT220 and upto 11 5 on GTX 570.
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post #7 of 15
Let it also be said that raising your PCIe clocks may also corrupt your hard drives.

I actually lost a RAID-0 array on an X38 last year by upping it a tad too high.
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post #8 of 15
Thread Starter 
Well my BCLK is fine. I have it at 210x21 and I'm happy with it that way.

Will putting it at 101 do anything in terms of my GPUs? Increase performance? Decrease? More stable?
post #9 of 15
Quote:
Originally Posted by Sin0822;12550491 
increase PCI-E helps increase BLCK you have to increase PCI-E in all instances to take BLCK over 220. You wont damage anything, but the GPU might stop responding over 105mhz. I can do upto 130 on a GT220 and upto 11 5 on GTX 570.
An unstable PCIe clock can generate silent errors and corrupt your HDDs...
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post #10 of 15
As I said before, people argue about whether it improves performance, improves stability, or neither. The fact of the matter is that it will probably not impact your system's performance one way or another.
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Leviathan
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