Changing PCIE frequency gives an extra 30 KHash/s for free !!!!!!

[Mich^]

Hi Guys,

I'm not sure if this works for everyone and if this is posted before but i found a way to get around 30 to 40 khas more for each gpu i have.

I have an ASRock extreme 4 motherboard and with the ASRock tool AXTU i changed the PCIE frequency from the motherboard to 95 MHz. And this gave 35 khash/s more!!!

Pic with the normal 100MHz: http://michielvanaalst.nl/tnet/100.png
Pic with the 95 MHz: http://michielvanaalst.nl/tnet/95.png

[MadMatt]

Anyone else try this? I think I'll give it a go

Edit: EasyTune for Gigabyte MB's doesn't let you change PCIe frequency, only cpu frequency :/

[Burninj]

if that's true this is really cool ^^

[Wipeout2097]

Very good find! Latency, latency, latency. Did you also disable everything not relevant for mining, including audio and firewire?

Is that an Asrock 970 or other model?

[MACROMOLECULE]

i tried it and couldnt get it to work. i too have the asrock z77 extreme 4

[Mich^]

i tried it and couldnt get it to work. i too have the asrock z77 extreme 4

I have this motherboard as weel. Together with an Intel Core i5 3570K.

But its not so stable as I first thought, after a few hours the hash rate drops down to +-500.

I'm now testing with 97Mhz. This give me still a small 20khas/s more.

[mac-coin]

Hi

I've just tried this on a asrock 970 Extreme3 R2.0 motherboard and after a 30min test,  I got about 1-2 kh/s more.  So without doing a 12 hour test I would say there was no change.