Assuming cost is not relevant, which option would you pick for a gaming machine:
1. 780i/Q9450 overclocked to 3.4 GHz, DDR2 1066, 9800 GX2
2. 790i/Q9450 overclocked to 3.0 GHZ, DDR3 1600, 9800 GX2
The first option's advantage is the higher CPU speed but I am concerned about the crippled northbridge of the 780i compared to the full 32x northbridge of the 790i. The second option's advantage would be the better northbridge which would allow future proofing when I upgrade my video card. Keep in mind the only upgrade(s) I would do to this machine would be new video card(s). I would not upgrade the CPU or memory. This machine would be in use for the next three years or so.