Crossfire vs No Crossfire

[Nukam]

I've seen so many threads on other sites having mixed reviews with how crossfire should be regarding mining. What do you guys think, is there an end all be all thread explaining pros and cons?

[CoinMakr]

I've tried both, and there is no difference in speed on the R9 280x Sapphires. Most people don't bother it seems, and neither do I.

[Nukam]

I see, I'm running 2 7950s and most of the time when I use GUIminer I get 500-700 KH/s on both.

[mufa23]

It makes no difference.

[Nukam]

Cool, ill stick to keeping it enabled then

[nastybit]

It doesn't make any difference buy I never left it enabled.
If you get good hashing leave it as it is, no need to disable it

[MonkeyDOH]

There is no difference between them.

[LPCobris]

Hi!
What about mixing 2 7950 and 2 280x on the same system?

Will there it be problems? They are all tahiti, but im not sure how that will do..

Thanks

LPC

[nzgrant]

LPC they should run fine but you will need a large power supply. My 750 wasn't enough for 2 280's plus 1 7850.

[LPCobris]

Hi!
Im purchasing a 1000w Fractal Design Newton R3 80+ Platinum... (my idea is 2x 7950 + 2x 280x)...

Best Regards,

LPC

[groschameau56]

Thanks for answers

[DodoB]

The high end GPU's(such as hd 7850) can be even better with crossife,i doubt if crossfie with lower end GPU's can be helpful.