Can my CPU & PSU handle GTX 650?

[bjayetnap]

OS: Windows 7 Ultimate ( Currently at 32bit but planning to switch in 64bit once I bought a new Graphics Card)
CPU: Intel G620 @ 2.6GHz
RAM: 4GB
MOBO: Gigabyte H61M - DS2 rev. 2.1
PSU: Power Choice 580 Watts ( Please Refer to the Image I posted below for PSU's Specification )

First Question: Can my CPU handle GTX 650 Properly?

Second Question: What is the Limit or Maximum type of Graphics Card can I get with my current CPU and PSU regardless of Budget?

Third Question:

I'm planning to choose between GTX 650 and GT 640 Graphics Card. I'm having a hard time to choose with the two. My Concern on 2 Video Card is..

GT 640 (4,200 PHP): Affordable, and I think I don't have to worry on my CPU and PSU. I think G620 and my PSU can handle this without a doubts.

GTX 650 (4,790 PHP): Affordable, It's just 590 PHP Higher than GT 640. What makes me worry on this Video Card is, can my CPU and PSU handle this? I read the Specification of the GTX 650 and It's just 1 Watts higher than GT 640. I just don't know if that Comparison from NVIDIA & http://www.hwcompare.com/category/gpu-comparisons/ is accurate and trustworthy. This card also need a 6 PIN connector. I saw an empty 6 PIN connector on my PSU.

Thank you & Hope someone can help me...

 

[ASHISH65]

Better go for hd 7750 instead of gtx 650.hd 7750 performs better and consumes 43w on peak.it will work with your psu.

 

[ASHISH65]

If you want nvidia then get gtx 650ti

 

[Cons29]

kabayan?

i am not aware of the quality of that psu, but if that is good then even a 660ti or maybe even a 670 would be ok.
the kepler consumes lower power than previous generations.

my 550w gigabyte odin could handle a gtx260 which consumes more than the 500 series.

check the 12v rail of that psu

 

[rezervesizeja]

Sure, your PSU will work just fine.

 

[bjayetnap]

@ ASHISH65: thanks for the input, I'll add 7750 on my list. But going to 650 TI will overkill my needs. So I think I will stick on choosing between GT 640/ GTX 650 plus the 7750.

@ Cons29: wow, we pinoys are really around the world XD. I am also not aware on the quality of my PSU. I called it semi-branded, it's not the physical generic PSU looks yet its not on the line of the well known Branded PSU's. My current PSU also has a switch on the back and 2 Fan (Bottom and Outside) physically, it almost look like a Branded PSU. Please let me know what kind of check or inspection should i do with the 12V Rail.

@ rezervesizeja: what about the CPU?

By the Way guys, is there any way to compute the estimate Watts running on my PC?

I will wait for more suggestions and comments.
Thanks !!!

 

[ASHISH65]

Do not use hw compare it is not accurate as it compares according to specs.use this one very usefull - http://www.anandtech.com/bench/GPU12/372