Graphics Card, AMD 7950 or Nvidia 660Ti?

[Artie]

Hello everyone. I'm in a big trouble selecting a new graphics card into my computer. I have two choices. In basics, the AMD 7950 Gigabyte Windforce (910MHz) is faster when i overclock it. The problem is it hasn't got PhysX technology, but will probably fill my needs. The Nvidia 660Ti MSI or Gigabyte (1019MHz) are strong enough, but they are overclocked yet, so it's probably their maximum. Maybe i can get them higher, but still. The problem is, they are PhysX supported.

My resolution and other specs:

CPU: I5-750 @3,8GHz

RAM: 4GB 1600MHz

Motherboard: ASUS P7P55D-E

Power Supply: Fortron Black Power 550W

Monitor: 1920x1080

So here's my questions:

1. Will http://www.gigabyte.us/products/product-page.aspx?pid=4121 be faster then http://www.gigabyte.us/products/product-page.aspx?pid=4319#ov?

2. How much clocks can i get out of Gigabyte Radeon HD 7950?

3. How much more clocks can i get out of Gigabyte 660Ti (OCed at 1032MHz)?

4. Which one is stronger? The MSI PE OC'd version of 660Ti or OC'd Gigabyte 660Ti?

5. Am i able run all the games on maximum graphics with both 660Ti and 7950? If i do, can i run them on maximum graphics even with PhysX enabled on 660Ti?

I can get both of them for like 350$, so there's not much deal in costs, and i get a free games even with the card.

As i looked in benchmarks, It was almost the same, the 660Ti got better than 7950 in some games, and 7950 in the other games. So it's really hard choose from.

Thank you VERY much for help, i appreciate it. Going to buy next week.

 

[jonnyp11]

you can get a 660ti on newegg for 300 or 7950 for 320. I'd go for the 660ti, cheaper and about they seem equal in performance on average. But if you're getting a gpu like that you want a better power supply not the low end pos in there, that seems to be a FSP group sub-brand or something and they aren't good to begin with, there is a good chance that will blow and take something with it if you put that much load on it. Also i'd grab another 2x2gb set of ram for 8gb's total, only need another 2gb's but dual channel is a good bit better.