Overall the system isnt that bad. E8400s can role with low end C2Q chips so if you are going to get a quad it needs to be a Q9xxx or just get an i3/5/7. Memory I wouldnt both upgrading unless you change the systemboard. On the subject of the systemboard, dont bother unless you are getting an i3/5/7 at which time 4-6GB (platform dependent) is all you'll need.
When it comes to graphics, the 4890 is still a strong card for non DX11 games. It is lands between the 5770 and 5830 in DX10 performance. If you dont mind no DX11 just get another 4890. If you want DX11, then you may as well get a 6850 or so price range card.
As for drives, SSDs are nice, but not fully up to their potential. i would hold off until Toggle NAND drives come out. The performance of Toggle NAND is much much greater than the current NAND drives.
When it comes to graphics, the 4890 is still a strong card for non DX11 games. It is lands between the 5770 and 5830 in DX10 performance. If you dont mind no DX11 just get another 4890. If you want DX11, then you may as well get a 6850 or so price range card.
As for drives, SSDs are nice, but not fully up to their potential. i would hold off until Toggle NAND drives come out. The performance of Toggle NAND is much much greater than the current NAND drives.







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