I recently built my first gaming pc. It's a small form factor. MOBO - ASRock FM2A75M-DGS R2.0. CPU - Athlon X4 750K. GPU - Sapphire HD 7770 1 GB. RAM - 4 GB G skill DDR3 1600. I'm pondering building something with a little more power, but relatively cheap(No more than $1000, preferably much less). I was considering buying a new case(better airflow), mobo(one that'll support crossfire), a few more gigs of ram, and a second hd 7770 card. I figure this would be the most affordable option. My concern comes in with the Athlon 750K. Would it bottleneck the GPU's? Do you have any opinion on the crossfired HD 7770 setup? Any opinions on affordable hardware alternatives?