Ok maybe I'm a couple of days late, but this post is making no sense...
Number 1...
As it's been pointed out, the 6600 is slower than the 6600 GT. Not only did you get 1 of slower versions, but thanks to the great deal you picked up two of them. You would of been better off getting just one 6600GT, or better yet, one 6800GT. Two 6600/6600GT's have less performance than one 6800 GT. Why? 6800GT has a 256 bit memory bus, 16 pipes, and a faster GPU and memory clock. Hence your not going to be more uber with two 6600's...
Number 2...
Because of your lack of reasearch before hand, you jumped on the PCI-E SLI bandwagon before you knew anything about it. Well at least you learned a valuble lesson on this front. 5 minutes would of been all you need to figure out that you would need a MoBo upgrade which basically results in a full system upgrade. That's the fun thing about computer technology in general. Things go obsolete pretty quickly these days..
Number 3...
If your main intentions was to put together a gaming system, you picked the wrong CPU for it. Yeah you did better than your original plan of a Celeron, buy upgrading to a P4. But a 939 socket AMD64 chip is a much better gaming CPU as demostrated by just about every CPU review out there. Hell a 754 AMD64 is a better CPU than a P4. That is unless of course you do a lot of video/audio encoding, in which case you lucked out and picked a good CPU for it.
The internet is a wonderful place, you really should use it more often...
