780i SLI , 9800 and DDR2 , need help.

Hey.

Im thinking about purchasing a computer that has a780i SLI motherboard, and a Nvida 9800GX2, now, my question is, will these support DDR2 memory or will they need DDR3 ?

Here is the deal im getting, also, need opinions :D.

as GS wont let me copy and paste it, i will right it out.

780i Sli Motherboard

NVida 9800GX2

4GB DDR2 RAM

320gb hard drive

samsung 20in moniter

Logitech 5.1 speaker system

Samsung dvd writer

Microsoft home vista premium 32 bit

500W power supply

Intel q6600 Quad core @ 2.4ghz

and a generic network card.

Final price = 2003.81 dollars CAN

oh and i replaced the 20in with a 22in samsung monitor , i managed to bump down the price spike by removing some unwanted featues.

New price = 1994.81 CAN