Overclocking the PCI-Ex clock

[sik1977]

The BIOS allows overclocking of the PCI-ex clock from 100 to higher values. nTune shows the PCX as 2500 and every added unit to the 100 digit in Bios results in 25 additional units under nTune.

My question is, is there any point in overclocking the PCI-ex clock, and if so, to what extent. I also noticed that If i run the performance wizard under nTune, it overclocks the PCI-ex clock to 2900+.

Thanks.

 

[MadModMike]

nTune must be referring to the speed in kilobytes, although I know it says MHz, because PCI-E is 2.5GB/s Full Duplex (Kinda like HyperTransport in AMD64) and that would be 5GB/s bandwidth. But also note that PCI-E uses 8B/10B Encoding, where it adds 1-bit of parity to the top 3 bits and 1-bit of parity to the bottom 5 bits, so it makes the 2GB/s Full Duplex (4GB/s effective bandwidth). I wouldn't overclock the PCI-E, there is no point. I've overclocked mine for testing purposes up to 125MHz and did not see any increase, so I would keep it the same.

~~Mad Mod Mike, pimpin' the world 1 rig at a time

 

[sik1977]

Thanks for clearing that up. I wonder why nTune overclocks it when you ask it to tune your hardware (not that i ever use it to tune my hardware, just checked it for test purposes).