I don't exactly remember which switch does what, so you will have to play around noting the original switch positions before you change them. There are some DIP switches on the back of the 4870x2, one which swaps the GPU's order around, and one to enable PCIe 1.1 backwards compatibility.

So my question is what the hell is with my gpu? I modified the XLM file to force the second gpu on at least 595/900mhz which is max that it let me do. So when I tryed few games in crossfire (SC2) it automaticly used the '1' as mine on 99 percent and the '0' went barely up to 33%. My GPUs are being reported as 0(main working great)/1(200/500 one lol)

So i just tried few drivers and few modifications and this is what i found so far When I force gpu to run on max power the 2nd clocks just wont move onģ. The clocks on 2nd gpu are 200mhz/500mhz rather than default ones on 1st one (saw tons of screenshots where ppl had same clocks on bothĢ. I know its quite old today, but I wanna build brand new machine rather than buying components one by one.īut all of those drivers game me the same thing.ġ.

I was broswing this forum quite alot without any post, but today I gave up on my HD4870x2.