Not happy with 2 5870's should I jump ship?

There is definitely something wrong here because you should have seen a great boost in performance in most games.Are you 100% sure that CF is enabled ? also what resolution do you play on ?

You should definitely see some improvement as long as the game support XFire and XFire has been properly installed/configured.

See following benchmarks which shows the increase from a single HD 5870 to XFired HD 5870.

http://www.xbitlabs.com/articles/graphics/display/gefor...

Everything is installed and enabled properly. Maybe I'm just not savy enough to tell a difference. I blame the card when I get my butt kicked on Black Ops, and I didn't have a chance to shoot back! (HAHA).
Do you guys think that this set up is at a high enough performance level, (assuming that everything is working properly) that I should keep em?

Black Ops isn't very demanding so you were probably already at 60 fps with the single 5870. You won't see any gains in that game from an upgrade. If your lagging in a multi-player game it's probably your internet connection not your video card.

It depends on they resolution that you are playing at. The higher the resolution, the more of a difference you should see between a single HD 5780 and XFired HD 5780.

If you have Crysis, then use that compare performance differences. Enter the following command in the console to display your frame rates:

r_displayinfo = 1

You can also download a program called FRAPs to get an idea of your performance, however, FRAPs is somewhat demanding so I think you will take a 10% - 15% performance hit when using it, but you should still be able to tell the performance difference with XFired HD 5870s.

Come over to the green side, we have cookies.  

 
Good stuff.
I will take a closer look at Crysis in higher res.

Thanks guys!

You should see a difference in gaming. I would up the resolution and see.

Hahaha... made me laugh MM  

 

XFX Crossfire 6970s: Working great! Massive improvement over XFX 5870. 4 GB VRAM.

con: price