Topic: off topic need pc help RAM questions

[BoG-ToY]

ok so Ive got this kit as follows

http://www.centon.com/pn/memory/ddr2sodimm/4gb667lt


and I bought the new dell duo flip thing specs

225-1691 Inspiron duo (Inspiron 1090) + Audio Station US FastTrack 04
317-7667 Intel N570 Dual Core, 1.6GHz, 2 x 512K L2 Cache
317-5793 2GB,DDR3,1333MHz, Runs at 800MHz
320-1788 10.1 in W 16:9 RGBW HD, Multi-touch, 1.3M Webcam (1366x768)
313-7048 Integrated 1.3M Pixel Webcam
421-4292 Stage, duo
421-3874 Camera Software 2.X, Factory Install
331-3215 Intel NM10 Express Chipset Video
342-2024 320G, 2.5inch, 7200RPM SATA Hard Drive

should I stick with the 2gb ddr3 @ 800mhz or the 4gb ddr2 677mhz?

[BoG-ToY [OP]]

edit, looks like the ram wont interchange... even though the pins are the same they are not backwards compatible and cannot be run