Hi All,

I just wondered if anyone can help me with upgrading my R4.

I was looking at getting an Hd 6990 and crossfire it with one of my 6870s I have at the moment.

Do I need a stronger power supply? ( I think it's 850watts in the r4) also do i need more fans better cooling etc?

I'm very new to pc gaming and would like to upgrade my system just not sure what i can and can't do.

Also any other upgrades tweaks etc to improve my system would be appreciated.

Thanks in advance for any help.

My specs-

i7 3930k 6 core 3.2 ghz

hd6870 crossfire

8mb memory  2133MHz