GPU and PSU Question

[Hargus56]

So my wife bought a desktop on QVC, but what she really needed was a laptop which we picked her up today. But we could not cancel the order so I have a desktop on the way. We were going to return it but I may be able to use it. It is this computer: http://www.qvc.com/qic/qvcapp.aspx/view.2/app.detail/params.item.E167937.desc.Dell-Desktop-PC-with-215MonitorAMD-QuadCore6GB-RAM1TBHD I currently have an Insperion 530 with a 450W PSU which I can put in it as well as 2GB of RAM more but I do need to add a GPU. I would like to spend under $150. I read that 5770 would run on a 450W PSU but I'm not sure it would work with my processor as well based on the AMD website: http://www.frostytech.com/articleview.cfm?articleID=2549 saying it may need 200Ws, but I am computer illiterate so I maybe wrong. The 5770 GPU I was looking at was this one: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102873 I am looking to buy this Wednesday next week if I need to add a PSU to run a decent GPU like I said I want to keep both under $150. I am mainly going to use the computer for general web surfing and run the Old Republic game when it comes out, I know it's not a system hog so I hope this computer and a new GPU will work well for me for it.

 

[Outlander_04]

Toms system builder marathon ran a phenom quad core and a 6850 on a 380 watt Antec Green psu

You should be totally fine

But only if the psu is a quality unit , with sufficient current on the 12 volt rails

 

[Hargus56]

Thanks for the info, cool I can get a better processor now. Question though you said: sufficient current on the 12 volt rails, I am not sure what PSU I got going on, how would I be able to find that out about the rails? And if it is not sufficient do you think I could find a new one on Newegg or somewhere cheap that support the 6850?

 

[Outlander_04]

Usually the amperage of the rails is marked on the power supply . Not always though

remember
volts x amps = watts

Yes you can upgrade the power supply .

 

[Hargus56]

Ok thanks for the info, just to be on the safe side and avoid delay in case my current PSU does not work I am thinking of grabbing one. The PSU and GPU I am looking at are these:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817148027
and
http://www.newegg.com/Product/Product.aspx?Item=N82E16814103122
Would these both work on the system I plan on getting? Will temperature be an issue?

 

[Outlander_04]

Ok thanks for the info, just to be on the safe side and avoid delay in case my current PSU does not work I am thinking of grabbing one. The PSU and GPU I am looking at are these:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817148027
and
http://www.newegg.com/Product/Product.aspx?Item=N82E16814103122
Would these both work on the system I plan on getting? Will temperature be an issue?

NOT that power supply . Junk .
The little red switch to change the voltage tells us that it doiesnt have electronic regulation of the voltage to the computer . Only ever buy a psu with Active pcf [ power correction factor]

The psu in the dell is way better than that

 

[Hargus56]

Thanks for all the help, I am getting ready to place my purchase now. Seeing how a 6870 was only $20 more I decided to opt for that, I am also looking at this power supply: http://www.newegg.com/Product/Product.aspx?Item=N82E16817371031

Btw the video card I am looking at is this one: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102948

Do you think these would work in the system?

 

[Outlander_04]

Good choices

 

[Hargus56]

Thanks for all your help buddy, I'll post a message when it's all here and built and let you know how it all goes.