Here is your bottleneck:
GeForce GTX 295 (GPU 1 of 4)
GeForce GTX 295 (GPU 2 of 4)
GeForce GTX 295 (GPU 3 of 4)
GeForce GTX 295 (GPU 4 of 4)
Four times a bad GPU....
You need one good GPU (good performance for DX10 graphics) with at least 2Gb VRAM.
Following options you have:
Wait for the next generation of NV cards (it is not out yet)
In the meantime, buy a temporary card for as little money as possible: GTX560ti with 2Gb
In the meantime, buy a temporary card for some money: GTX570 with 2.5Gb
In the meantime, buy a card for a lot money: GTX580 with 3Gb
Buy an ATI card of the new generation (came out this month)
~S~
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