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pci xpress clock in bios - Page 2

post #11 of 21
Quote:
Originally Posted by crashovride02
On my board I can change the clock frequency from 100 to 145 for PCIe. Why does everyone say to leave it at 100? I have mine set at 145 and it runs fine. What will happen by having it higher?
bump
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post #12 of 21
I don't know why it's running fine, it should give you corrupted graphics and such. 100 is where you want it because that's where the PCI-E bus is designed to run around.
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post #13 of 21
My friend bumped his up to 130 yesterday and it corrupeted his sata hard drives.
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post #14 of 21
^^ That is normal, safe range should be 100-108.
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post #15 of 21
I get no corrupted graphics of any kind. I even ran aquamark3 at 100 and then at 145 and I actually saw better numbers from it. If I leave it at that will there will it cause damage to my PC?
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post #16 of 21
Quote:
Originally Posted by crashovride02
I get no corrupted graphics of any kind. I even ran aquamark3 at 100 and then at 145 and I actually saw better numbers from it. If I leave it at that will there will it cause damage to my PC?
You might encounter system instability later down the line. A safe range is 100MHz for nVidia based cards and 105MHz for ATI based cards.
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post #17 of 21
Quote:
Originally Posted by crashovride02
I get no corrupted graphics of any kind. I even ran aquamark3 at 100 and then at 145 and I actually saw better numbers from it. If I leave it at that will there will it cause damage to my PC?
Overclocking the PCI Express bus is a double edge sword, yes it's logical that you get better performance when you highly overclock the PCI Express bus because in high bandwidth instances, data can get to the videocard from the rest of the computer. It's similar to how overclocking the AGP/PCI bus would also lead to better 3D performance.

The risk comes with data corruption as the others indicated. With videocards it's not quite as vital (and seeing how there are few PCI Express devices on the market/onboard on motherboards there is little device data to corrupt as well) but it causes the Serial ATA bus to run out of sync which can lead to data corruption because HDDs are notorious for being stingy on bus overclocking.

If you can run a 145 MHz PCI Express bus, that's great and enjoy its benefits. If you start to get weird errors popping up on your HDD, at least you know it's time to turn it down a bit.
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post #18 of 21
You know, you may not notice anything by having it at 145, but maybe it's causing some tiny errors. All it takes is that last error to corrupt an entire harddrive, so I'd be careful.
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post #19 of 21
Quote:
Originally Posted by Burn
You know, you may not notice anything by having it at 145, but maybe it's causing some tiny errors. All it takes is that last error to corrupt an entire harddrive, so I'd be careful.
does it matter that I am not running a serial ATA drive? I'm only using an ATA 100 drive.
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post #20 of 21
I wouldn't risk running the pci bus that high no matter what you have. Its not safe and its better to be safe than paying money for a new system. Only tinker with stuff you know.
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