AMD A8 5600K crossfire card research

Finally deciding on a HD 7770 1GB GDDR5. It might not fully function, but perhaps it'll last a little longer, and with games which don't support crossfire I can use on its' own.
 Found it here for £65


Motherboard Biostar HiFi A75S3
1 x 16xPCIe 2.0 (you can plug 3.0 cards in though)

This forum advises a HD 6570, but I can do better!

Heres a youtube of a 7750

Here's a comparison of different cards 

looks like the HD 7850 might be the better bet now. Less power consumption (I have a bad PSU).


Not sure now if my motherboard can do crossfire?

Also, PSU only has 1 x spare 4 pin, no 6 pin!! It's OK because you can convert 2 x 4 pin to 1 x 6 pin.

HD 7850 2GB GDDR5 it is then. For around £80 second hand.