please help me for upgrading my graphic card

  habs2habs 07:23 30 Sep 2009

Hi everyone

please i need your help.

i have ipower 9099 packard bell desktop.with specification:

-quad core Q6600
windows vista ultimate
640mb nvidia 8800gts graphic card
1 TB hard drive in raid configuration
direct x 10.0
sp2(windows update) is up to date
400 psu
p5n_e sli motherboard.

i would like to upgrade my graphic card to:
1 GB 4870 ati GDDR5, memory.

-i don't know if my motherboard can handle this graphic card(GDDR5 memory)

-do i need to upgrade my psu.i found some psu from click here,
novatech brand 600watts.

kindly can you please help me,

-will this graphic card works with my motherboard,(i don't want to receive any error code,or blue screen error?

-can i buy psu from novatech brand,would you recommend from novatech brand.or any other kind around £50.00-£60.00

i am playing a lot of games:crysis,crysis warhead,unreal tournament,call of duty 1,2(old games),3,4 etc...

i hope to hear from you very soon

My kindest regards

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