crossfire is enabled but will NOT Work! PLEASE HELP!

[kpowers5792]

Someone please help! I have 2 ATI Radeon 3870s crossfired, but even though I have crossfire enabled in ccc, There is absolutely NO improvement in benchmarks in 3dmark or fps in half life 2. Its showing exactly the same score and fps as when I only use one card. I've done Hours of research on this and so far found nothing. Anyones help would be greatly appreciated!

Here are my system specs:
Gigabyte ma790x-ds4
AMD dual-core 3.2gigs
2 gigs mushkin+2gigs corsair xms(4 gigs ram)
2 ati radeon 3870s
seagate 250gig hard drive

 

[badge]

Downlaod and install the latest 8.6 catalyst drivers.

http://ati.amd.com/support/driver.html

Download and install GPUZ and be sure installing the 8.6 driver is running two cards in Crossfire.

http://www.techpowerup.com/downloads/1124/TechPowerUp_GPU-Z_v0.2.5.html

Also, back all the sliders down in CCC if they are maxed out.

 

[kpowers5792]

I've tried all that. Do you think maybe my mobo or cpu could be bottlenecking? The second pcie slot is only 8x, I know there isn't a huge difference between 8x and 16x, or dual core and quad core, but i'm running out of ideas and i'm willing to try anything!