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What the deal with OCing the PCIe bus setting in the BIOS?

post #1 of 12
Thread Starter 
In my BIOS the PCIe is set to 100, the lowest, and it can go to 150.

Do people OC it, and what effect does it have, especially if the external GPU is already OCed from a windows program, in my case, ASUS's smartdocter OC prog.
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post #2 of 12
For the common user, keep it at 100. No need to touch it.
post #3 of 12
It is dangerous to OC the PCIe. It is a reference clock for your pcie devices, southbridge, and other mobo devices. The biggest issue with overclocking it, and the one that shows symptoms first, is that it will cause SATA devices to fail due to transmission failures.

Many people claim that 100-105ish is safe, and that it can help stabilize particularly high overclocks on the x58 platform (possibly some others too). However, I have seen it cause hdd errors as low as 103 (particularly if using RAID)
post #4 of 12
110MHz is the safest *Max* don't take it any higher than 110MHz, unless you want to see data corruption errors on your hardrive :/
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post #5 of 12
Thread Starter 
Does it improve the FPS in games, thats my only interest in messing with it.
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post #6 of 12
changing it from 100 will fry your card and hdd's as that controls the sata controler too..
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post #7 of 12
Quote:
Originally Posted by Mit Namso View Post
Does it improve the FPS in games, thats my only interest in messing with it.
Why would you risk your HDD's etc just for a increase of FPS?
post #8 of 12
Leave it alone.

You *MAY* get away with up to 105 but you will not notice any difference and it is dangerous.
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post #9 of 12
Thread Starter 
So why do they have that setting, if it only has the above bad effects everyone says?
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post #10 of 12
You have absolutely nothing to gain by increasing this value.
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