Sudden drop in fps in crysis

hello all

need help

While playing crysis1.2 i get a sudden drop in fps

usually i get abot 25-35 fps in high setting @ 1280 x 800 noAA

but today the fps drops to about 10-15 at any random point during the game (always with 20-30 minutes of play)

iv done 2 things that may case this

1.
i installed new ram this morning 2 1 gig patriot low latency 4-4-4-12 800mhz DDR2 chip and enabled them
in sli ready mode in the mobo bios

iv checked the memoey clocks and timing and everything is as it should be

iv also tried turning the sli ready mode off and that didnt help

2.
i upgraded to the nerw nvidia driver 182.06

i would roll back the driver but i formatted this morning and dont have the previous driver anymore


any help would be apprciated


vista home premium 32bit
Alienware 680i sli mother board
Intel duo E6850 @ 3.00 ghz cpu
2gb patriot 800mhz ddrz low latency 4-4-4-12 ram
500 gb raid (x2 250gb sata) drive's
creative xfi extreme gamer sound card
x2 Nvidia8800gtx SLI gpu's



p.s
dont belive the SLI hype (it suck's balls)