Upgrading graphics card help!!!

[Minijack]

I want to put a gigabyte GTX 650 2GB in my computer but I don't know how many watt my power supply has but my specs are

Intel core i7 920
4gb of ram
Gainward GTS 250
EX58-UD3R motherboard

If my power supply can currently support those components can it support a GTX 650 2gb?

 

[Swordkd]

What is the brand/model number of your Psu?

 

[ferooxidan]

you can already put GTS250 on your rig so Im guessing around 450 to 500 watt. it should be enough, but why an old card? maybe a gtx750Ti? much better card and lower power consumption (select models only required pcie power input, 75watt).

 

[charmer]

It will, as you can see in the link I'll post below.
You do need to check if you have a six pin connector from your PSU just in case
http://www.hwcompare.com/13548/geforce-gts-250-512mb-vs-geforce-gtx-650/

GTS 250 uses 145 Watt, the 650 uses 64 Watt only..
I would Not suggest getting the 650 by the way, if it matters.