• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

How do you O/C a slave Xfire card?

Technojunkie

Technojunkie

Technojunkie

Associate
Joined
22 Mar 2006
Posts
46
Anybody got any advise on overclocking the secondary card in a Xfire setup?

The only utility that will actually recognise my secondary card is Rivatuner.
It doesn't matter if I screw the clocks up or down, it makes absolutely no difference to my 3Dmark05 results.

All help gratefully recieved
 
I've not checked to see if that's scores OK

System is:
Sapphire x850 master
Sapphire x800GTO^2 (BIOS Flashed)
ASUS A8R-MVP
XP3200 running @ 2.3Ghz
1G Corsair

Is 9300 good???............Anybody
 
Nop! both cards seem to be running at their stock speeds. So says Rivatuner

That's my problem. I want to clock the slave GTO^2 back up to where I had it, but nothing seems to work.I can set the clocks to anything I want in Rivatuner, but I get roughly the same 3dmark05 score every time.
 
With ATi Tool, can't you select which card to overclock?

Its either that, use ATi winflash to grab the bios off the GTO and then use RaBIT 2.0 to edit the bios to the speeds you had it running to before and then reflash using either winflash or the DOS version called ATi flash.
 
couldnt you disable crossfire put the x800 into the primary slot overclock it then put it back in secondary slot shuv in the x850 then enable crossfire or would enabling crossfire put everything back to stock
 
It' doesn't quite work like that(I wish it did).

When you overclock using tools like ATItool, Trixx, Rivatuner etc, it's just a temporary software frig that overwrites the clock settings that are held in the BIOS. As soon as you turn the power off this is gone. When the machine boots back up the graphics card reads its BIOS which will be the standard clock settings. That's why you get the option in most O/C tools to run at windows start-up, so that the card initialy boots with it's default clocks, then when windows loads and kicks in a piece of overclocking software such as ATItool, ATItool then screws up the clocks.

Mekrel is right to get around this you would have to edit the x800's BIOS then reflash them.

But surely I shouldn't have to go to this extent.



When in crossfire mode I can't select the secondary card in ATItool. It see's it but when I select it, it says it isn't being used by windows, and hence won't let me alter anything.

As I said, Rivatuner is the only utility that recognises the second card and lets you play with the settings, but it appears to make no difference.
 
How about disabling the slave card and using the master card, making a profile for it in ati tool with overclocked settings then save it, then re-enable crossfire mode?
 
So Mr Psycho what mods have you made to the BIOS then?

Or is it top secret and you'd have to kill me if you told me?


As for making an ATItool profile, it does'nt work either because as soon as you enable crossfire, ATItool say's that the secondary card is'nt used by windows and blanks it out.
 
Tim said:
So overclocking the master card doesn't also overclock the slave card, like with SLI?

:confused:
Click to expand...

No, SLI has to be 2 identical cards, hence the overclocks will do both. Crossfire can have any 2 radeon cards as long as the master is CF enabled.

So you could have an X1900XTX Master and a X800GT as the slave. the X800GT would never be able to reach the clocks of the X1900XTX, so overclocking both to the same clocks would be disastrous for the slave card, and your wallet!!
 
Well the bios mod makes the card's defualt speeds 540 / 1180 with 16 pipes (x850xt pe) its made to burn onto cd so it can be done in like 20 seconds ;)
 
You must log in or register to reply here.
Back
Top Bottom