2nd 6870 showing crossfire disabled

[Tarent]

Hi,

It seems that my CF setup is not working. In GPUZ the first 6870 is CF enabled, while the 2nd is disabled. I have seen no improvement in frame rate in Lotro ~40-80fps (outside), ~20fps (busy town). I have downloaded and reinstalled 11.9 and CAP, but it did not help. I have CrossfireX enabled in AMD Vision and it does show both GPUs. No information is displayed in the AMD CrossfireX Diagnostics.

My specs are:

Gigabyte GA 870GA-UD3, Asus 6870 (x2), DDR3 4gb 1333 Gskill ripjaw, PC&C 750w CF PSU, AMD Phenom II 655, OCZ Vertex II 120GB SSD.

I am aware that my PCIE 2.0 are running at 16x and 4x.

Any help would be great!

 

[arnoo1]

Try run one card versus 2 cards in other games, maybe in your game crossfire isn't supported, also 16x vs 4x isn't problem your second card gets enough bandwidth

 

[FreedomEclipse]

IMO - 4x PCI-E is a total waste of time for plugging graphics in.

theres not much difference from 16x|16x to 8x|8x but 16x|4x just makes the whole point a waste of time.

Sure you might get better frames. but it wouldnt be worth the price you paid for that 6870.

My advice would be to sell BOTH of them and get a GTX580.

2 properly crossfired 6870's would net you about 27k in Vantage - thats roughly the same score as a GTX580. with the 580 you would most likely get better performance.

the only downside to all this is if youre running your CPU at stock speed. it might bottleneck the 580 but i still stand by what i suggested/recommended.

if you can clock your CPU to 3.8Ghz, that would take a lot of the pressure off