Gtx 460 and hd 7770, help me with my question!

[ArcticWonder]

I am deciding between buying a gtx 460 and an antec neo eco 520w, or buying an hd 7770 and running it off my existing Dynex 400w psu.
The hd 7770 would cost about $120.
The gtx 460 + power supply would cost quite a bit more. Around $160.
So here's the thing: I know simply buying the hd 7770 is cheaper, but I'm worried about using my old Dynex 400w with it. I feel it might be better to get a new psu, but if I do, I don't have much for the gpu.
So.. Any ideas?
Thanks guys

P.S. Again I'm not asking whether to buy solely a gtx 460 or a hd 7770, it's the power issue I want to know about.

 

[ArcticWonder]

Now that I think about it, I could try to catch the HD 7770 on a sale and that would take care of the problem, and I could get a PSU as well.

 

[Onus]

That Dynex is a PSU-shaped object. It is, perhaps, a 200W PSU: http://www.hardocp.com/article/2008/05/13/getting_best_buy_on_power_supply/
Do not use it; it will die and may kill attached parts.

 

[ArcticWonder]

Does anyone have a recommended psu for the hd 7770 that costs around 40 dollars?

 

[ArcticWonder]

That Dynex is a PSU-shaped object. It is, perhaps, a 200W PSU: http://www.hardocp.com/article/2008/05/13/getting_best_buy_on_power_supply/
Do not use it; it will die and may kill attached parts.

K I'll be sure to get a new psu for the hd 7770. Any suggestions?

 

[Onus]

The Antec VP-450 is a decent PSU, and only $39. For $40, you can get a 400W Neo Eco. They're both decent PSUs. The VP-450 isn't 80+, but don't be deceived; it is efficient enough (it might make Bronze), but is disqualified for not having active PFC.

 

[austinwillis81]

AMD site recommends a 500 watt PSU, but any QUALITY 450 watt PSU would do. Like a Seasonic, Corsair, Antec.

 

[Onus]

The V2 Corsair Builders are not up to Corsair's past high standards. They review well, but have been found to use inferior Samxon capacitors that may not hold up.

 

[ArcticWonder]

Best answer selected by Arcticwonder.

 

[Onus]

Thanks. Enjoy your upgrades!