2gb Sapphire Radeon HD 4890 and 1GB in crossfire? Would it work? Motherboard P5Q PRO Turbo
Your cpu is a dual core it will bottleneck a lot of games.
Get atleast a quadcore cpu.
I believe If you crossfire the two, the one with the worse specs will be the one used.
So your 2gb ram will turn into 1gb ram.
It won't make much of a difference unless your doing mods