HD6870 BE Xfire HD6850 BE?

[sod16]

Can i Xfire these two cards both XFX both Black edition just one is 6850 the other is 6870...

Pro's and cons?

Thank you!

 

[jay2tall]

Here is AMD's crossfire compatibility chart. Those cards would work fine. Usually you want the same GPU for optimal performance, but you will definitely see an increase. If you already have the card's though, toss them in. Just make sure you have an adequate power supply.

http://sites.amd.com/PublishingImages/Public/Graphic_Illustrations/WebBannerJPEG/AMD_CrossfireX_Chart_1618W.jpg

 

[sod16]

Thank you for the link, unfortunately these are black editions (Factory OC) Will that matter, will one underclock itself?

 

[ringzero]

Here is AMD's crossfire compatibility chart. Those cards would work fine. Usually you want the same GPU for optimal performance, but you will definitely see an increase. If you already have the card's though, toss them in. Just make sure you have an adequate power supply.

http://sites.amd.com/PublishingImages/Public/Graphic_Illustrations/WebBannerJPEG/AMD_CrossfireX_Chart_1618W.jpg

I'm hoping to eventually add a second 6870 down the road. For the OP's benefit and mine, what would be an adequate PSU to power his two cards? Is there a resource for determining that?

 

[sod16]

they recommend 6850 and 6870's. I hope B.E can do it.

 

[sod16]

I'm running 3930k and a AX850... I HOPE it can do it.
2SSD's
etc.

 

[jay2tall]

In a traditional Crossfire setup, if they were both 6870's. The cards would clock to the speed of the slower card. At least that is my understanding. With Crossfire X and them being different I am not sure. I think they will run at their current speed.

As far as power supply, an AX850 is PLENTY. I was thinking more along the lines of a GOOD 600-650W power supply... 700W if you are overclocking the CPU.

 

[sod16]

@jay2tall I just did a calculator and even added a watercooling pump to the mix, plus 3SSD's 2HDD's and 3 big fans and it said 735 watts IF everything is at 100% (oh and 8 ram sticks). Plus the AX850 peaks at 1000watts So yes I think it is enough thank you .

The chart says that 6850 and 6870 is a recommended Xfire setup. I think both of the cards are identical just flashed differently.