New Graphic card

No way is a 450 w gonna power that vid card,you should look at atleat a 750w power supply from either corsair/antec/silverstone/thermaltake(toughpower series)

nailed it right on the head
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006&Tpk=corsair+750w

Night_Wolf said:

No way is a 450 w gonna power that vid card,you should look at atleat a 750w power supply from either corsair/antec/silverstone/thermaltake(toughpower series)

Click to expand...

you might be right.
but i calculated some wattages of my computer
@ http://extreme.outervision.com/psucalculatorlite.jsp

My desktop runs on a 250w power supply(HP a6130n) in perfect stock condition and i don't have a cooler or any output devices. The site told me that I need about 69w boost for the 8800gt(I've changed my mind from the gts). So I was thinking the Corsair VX 450 was going to be fine (396w of max output).

when you use the caculator you need to add 30% to the end figure
with the 8800gt you will be in this range
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005&Tpk=corsair+650w

We've seen to many people try to say or get away with 400 watt power supplies , and have them fail only a few weeks later, leaving us saying "I told you so". Lol . Just get a good psu the first time around and you wont have to buy another one.