PSU Usage Query

[Skerne]

Hi folks, quick query regarding my PSU.

I have an Antec Neopower 650w PSU powering this build:

Intel Q9550
ASUS P5Q Deluxe
4GB DDR2-1066 RAM
Radeon 4890

Had this PSU for a few years now and it's been doing me great, never had an issue with it. However, a friend of mine came into an inheritance and really wants to buy me a GTX 580 for my birthday (i'm not complaining!).

My question is.. will this power supply be able to handle the above CPU, RAM and MB plus a GTX 580? The GTX will probably be far overpowered compared to the rest of the parts but it makes a solid card to upgrade around later when I start on a new PC build at the end of this year.

I overclock the CPU now and again (to around 3.8Ghz) but it usually remains at stock. I keep the 4890 at stock and will probably do the same for the 580.

This is the PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817371011

Thank you for your time.

 

[MagusUK]

Personally I would maintain the overclock on the CPU at 3.8 so as not to bottleneck the 580.

I would say more likely than not you will need a 800w PSU to keep all that juiced.

Also consider the number of HDD's you are running but al in all I would say 800w will be good & that set-up should keep you till Ivybridge

EDIT: BTW does your friend want a new friend?

 

[setter]

A 650w psu will be fine with a gtx 580 and the rest of your setup. Im running a much more power hungrier i7 cpu with dual gtx 470's, (very power hungry cards), with gaming the system draws 630w, psu is an 850w corsair. I know of at least one other user on the forums here, running a q9550 @3.8ghz with dual 470's as well, on a 750w psu.

Have a look at the power consumption figures here.

http://www.anandtech.com/bench/Product/312?vs=305