/im buying a pc a little help please

Question

Ok here are the pcs i am thinking about buying, both from cyberpowerpc(i CANNOT BUILD!)

It has DDR3 RAM, is it faster than DDR2? its also $689.

CASE: A-Top Raptor Titanium Mid-Tower 420W Case

CPU: (Sckt775)Intel® Core™ 2 Duo E8400 CPU @ 3.0GHz 1333FSB 6MB L2 Cache 64-bit

MOTHERBOARD: (QX9650/9770 Support) GigaByte GA-EP45T-DS3R Intel P45 Express CrossFireX Chipset LGA775 FSB1600 DDR3/1600 Mainboard w/GbLAN, USB2.0, IEEE1394a, &7.1Audio

MEMORY: (Req.DDR3 MainBoard) 2GB (2x1GB) PC1333 DDR3 PC3 10666 Dual Channel Memory (Corsair or Major Brand)

VIDEO CARD: NVIDIA GeForce 9500 GT 512MB 16X PCI Express (Major Brand Powered by NVIDIA)

VIDEO CARD 2: NONE

VIDEO CARD 3: NONE

LCD Monitor: NONE

HARD DRIVE: Single Hard Drive (320GB SATA-II 3.0Gb/s 16MB Cache 7200RPM HDD)

Data Hard Drive: NONE

Optical Drive: (Special Price) LG 20X DVD±R/±RW CD-R/RW DRIVE DUAL LAYER (BLACK COLOR)

Optical Drive 2: NONE

SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO

Or is this one better? ddr2 ram, and 500 bucks about.

CASE: ($20 off Mail-in Rebate) Apevia X-Cruiser Mid-Tower 420W Case W/ WINDOW, MultiMeter Display & Control (Silver Color)

CPU: AMD Athlon™ X2 4400 Dual-Core CPU w/ HyperTransport Technology

MOTHERBOARD: Asus M2N SLI NVIDIA nForce 560 SLI MCP Chipset DDR2/800 SATA RAID PCI-Express MBoard w/GbLAN, IEEE1394, USB2.0, &7.1Audio

MEMORY: (Req.DDR2 MainBoard)2GB (2x1GB) PC6400 DDR2/800 Dual Channel Memory (Corsair or Major Brand)

VIDEO CARD: NVIDIA GeForce 8500 GT 512MB 16X PCI Express (Major Brand Powered by NVIDIA)

VIDEO CARD 2: NVIDIA GeForce 8500 GT 512MB 16X PCI Express (Major Brand Powered by NVIDIA)

VIDEO CARD 3: NONE

LCD Monitor: NONE

HARD DRIVE: Single Hard Drive (320GB SATA-II 3.0Gb/s 16MB Cache 7200RPM HDD)

Data Hard Drive: NONE

Optical Drive: (Special Price) LG 20X DVD±R/±RW CD-R/RW DRIVE DUAL LAYER (BLACK COLOR)

Optical Drive 2: NONE

SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO

Answer 1

Ok, go with DDR2 but instead of getting that graphics card. Go with ATI 4000 series because you are buying a crosfire motherboard. and i am telling you, it is very very very very easy to build it yourself and a lot cheaper. Nothing will go wrong.

Answer 2

One thing you need to do before ordering either is add a better Power supply to it if you are using that Video card

I would not have less that a 600watt in either one of them

And since you have 2 video cards You need a PS of at least 8050 to 1000 wats

Never run with too small a power supply or you will kill your system

a good place to ask about builds is at toms hardware forum

http://www.tomshardware.com/forum/

or techguy forums http://forums.techguy.org/

both will tell you what I did though on those power supplies