ironleg1963

My motherboard is a Gigabyte GA-P35C-DS3R VER.1.1 BIOS F12E
I have 4 1 gig sticks of OCZ ATI certified crossfire DDR2 PC2 800 MHZ and a Intel Q6600 Quad core 2.4 ghz with G0 stepping. I am going to updatye my video card but the board has only 1 PCI X 16 slot so I figured on a x2 model from ati would work. I have an Antec quttro true power modular 1000 watt with the 80% rating in an Antec 900 case, 2 samsung 500 gig hdd and a wd black 1 terabyte hdd. I have the M1 killer nic and an ageia physix card direct from ageia months before the nvidia buyout.
I want to switch to DDR3 because I have 2 slots and it can handle 4 gigs total. the DDR 2 slots can handle 8 gigs of DDR2 pc210666. My FSB is 1333 and the site mentioned it can overclock the ram and FSB to 1600 so what should I get? I play games and do media stuff on my computer for family website and family reunion dvd`s.

A ny advice is greatly appriciated as well as advice on how to achive the best performance on air. my cpu heatsink is a thermaltake ultima-90 with a vantec tornado 92mm x 323mm cooling fan, and the antec 900 case has 4 120mm fans and 1 200mm blowhole fan. I do not know if a 4870 x2, or a 4870 x 2 will fit in my case- if anyone knows the lengths( I am looking at the ASUS trifan heatsink, 3 fans and it takes 3 slots due to the after market cooling )

any advice is welcome.

thanks!
ironleg

Regeneration

1. You should stick with DDR2 as DDR3 is too expensive and there isn't any performance gain. To be honest, my performance went down after switching to DDR3.
2. You should go with single HD 4870 as Crossfire (And HD 4870 X2) is still buggy as hell. Besides, P35 is a bad chipset for Crossfire anyway.