Upgrading grahics card

[precursoris]

I currently have a Nvidia GeForce GTS 250 graphics card, but I'm looking to upgrade it. Here are my computer specs:

OS: Windows 7 Home Premium 64-bit
Processor: Intel(R) Core(TM) 2 Quad CPU Q4800 @2.66GHz (4 CPUS) ~2.7GHz
Memory: 8GB RAM DDR2
Video Card: Nvidia GeForce GTS 250
Power Supply: 450 W

Here are the cards I'm considering:

http://www.memoryexpress.com/Products/PID-MX30252%28ME%29.aspx

http://www.memoryexpress.com/Products/PID-MX30370%28ME%29.aspx

http://www.memoryexpress.com/Products/PID-MX30369%28ME%29.aspx

How would you rank these graphics card?

 

[Onus]

For performance, looks like 1,3,2. What brand and model is your "450W" power supply? If it's a chokemax (e.g. a cheap one that came with your case), it may not be strong enough.

 

[precursoris]

Here is my PSU information:

I just found out that the first and third graphics cards I listed are sold out. So should I get the second one? Is it a lot better than the graphics card I already have? You can find the exact specs of my graphics card in the following link: http://www.memoryexpress.com/Products/PID-MX27367%28ME%29.aspx

One thing that worries me is the my current graphics card has a memory interface of 256-bit, whereas the second graphics card I listed only has a memory interface of 128-bit. Should I be worried about this?

 

[Onus]

That's a good PSU.
Can you buy from Newegg? The GTS250 and GTS450 offer similar performance, so the latter would not make a good upgrade. Even a 1GB GTX460 is only two tiers higher, so won't be a huge difference (although I suspect worthwhile).

 

[precursoris]

Since you said that the GTS450 is not a great upgrade, I looked around some more and found the GTX 460 superclocked here: http://www.memoryexpress.com/Products/PID-MX30253%28ME%29.aspx

Is this a good upgrade? Could you find something better in these lists that my PSU can handle:

List 1

List 2

And I can't get it from newegg. It has to be from the store shown in the links above.

 

[Onus]

You should be able to run a GTX460 on that PSU. I'm not sure I'd do that long-term with one of the "superclocked" ones (they'll draw more power), but one like http://www.memoryexpress.com/Products/PID-MX30030%28ME%29.aspx should be fine.

 

[precursoris]

So the ASUS GTX460 is better than the EVGA GTX460?

 

[Onus]

It is a slightly slower card out of the box, but, not being factory overclocked like the EVGA, will draw less power. You can always use MSI's Afterburner software to overclock it yourself. Why pay $25 for something you can do yourself?