Windows 7: PSU requirement for Nvidia GTX 650

OS: Windows 7 Ultimate x64
CPU: AMD Athlon 7750 x2
RAM: 4GB
GPU: Nvidia GeForce 9500gt
HDD: Seagate 1TB

Hi guys.
I am planning to upgrade my graphics card and buy a Nvidia GTX 650. On their site I saw it needs a 400W power supply. I currently have a 450W power supply. Do I need to change the PSU or will it suffice for the new card?
Thanks in advance.

I would go with a 600 to 650 watt

That should secure good power and some headroom to Oc the card and Cpu if need be

Newegg.com - CORSAIR Enthusiast Series TX650 V2 650W ATX12V v2.31/ EPS12V v2.92 80 PLUS BRONZE Certified Active PFC High Performance Power Supply

These are sturdy and give great stability

But can I go with the current power supply if I don't OC the gpu and the cpu?

Hard to answer with the info provided. But ...

It depends on what PSU youre talking about. A good quality made 450W PSU will probably be fine for that setup.

A cheaper or offbrand PSU may have issues, possibly even resulting in permanant damage (worst case scenario)

If you look at the side of the PSU there should be a sticker on the side.
It should tell you the key info you need such as:

Name, Model, Rated Wattage AND the biggest thing, the amps on the 12V rail.

Ive looked at the PSU listed in your system spec, Foxin 450W , and found little info on it. But from what I can gather, I would highly suggest you just start looking in the 550W range for a Seasonic, Corsair, or Antec.


I would say for any single GPU system, 550-650 is really a sweet spot for single GPU sysytems.
Mainly, becasue it supplies plenty of power to all components, allows room for overclocking, and allows you to upgrade to high end GPU without worring about power in the future. Plus, depending on the type, it may be more effecient too saving you money over time, even though its technically more powerful than your current one.

In a nutshell, upgrading is probablly for the best. A good quality 450 will do, sure, but since you need to upgrade anyway look to the 550-650 watters. This allows headroom for future upgrades. A 550W would be my suggestion from one of the brand listed.

Hi Wishmaster. Thanks for the reply. I am currently looking at two PSU models. One is Corsair CMPSU-600CXV2UK 500 watts and the other is Cooler master extreme II 625 watts. Which one do you suggest me to go for?

The Foxin unit is not a reliable power supply. As stated in other responses, a poor power supply can take out other components if it fails. Never cheap out on a PS.
According to one respected site, the CollerMaster Extreme you are considering only supplies 75% of its rated power. GET THE CORSAIR. But, make sure it has a 6 pin connector for the GTX 650.
The GTX 650 requires a 400W PS. However, that is for the entire system and not just the video card. The max power draw (according to NVIDIA) is 64W.
Good Luck.

I agree with bej, and recommend you to get the CROSAIR.

When you are shopping for a PSU, make sure it has the 80 plus certification. It certifies that the product has more than 80% efficiency when running at full load. And that it can run at full load without melting down, something not all uncertified PSUs can do.

The corsair one is certified, the other is not. Buy the first. (although the model code you posted is from a 600 watt PSU, not for a 500 watt one)

Does Seasonic ECO 600 have the 6-pin connectors that I need for the card? It has 85% efficiency and only marginally costlier than the Corsair one.

Hi again,
Seasonic ECO 600 does not have the 6 pin connector.
But i found you a SeaSonic PSU that has 1 x 6-Pin, 1 x 6+2-Pin. It has >87% efficiency.

> http://www.newegg.com/Product/Produc...82E16817151095 <

I'm not sure if you can find it in your country, but i think it's good for the GTX 650.