What are the most important GPU specs?

Comparing cards at GPUReview.com since I want to upgrade my 1Mb GeForce 9500 GT card. Which stats below are most important for ISBoxer?


Core Clock:
Shader Clock:
Memory Clock:
Memory Bandwidth:
FLOPS:
Pixel Fill Rate:
Texture Fill Rate:

My current system is:

Core 2 Quad Q8200(2.33GHz) 4GB DDR2
500GB SATA-II 3.0Gb/s 7200RPM HDD
NVIDIA GeForce 9500GT 1GB PCI-Express Graphics Card
420W Power Supply
Windows Vista

Thanks!

[lax]

I don't have the answers as far as specific GPU speeds and features, but generally you want 1GB+ of memory on it (added VRAM is only useful up to a point), fast clock speeds and high memory bandwidth. Most of the numbers they tell you are just fluff and have no meaning to the average gamer other than "faster is better"... That's why they simplify it into model numbers like an ATI 5870 is better than a 5850 but worse than a 5970.

IMHO, all you really need to do is pick a price range and find the best value in your range, that fits your motherboard, that your power supply can support, and that has the output ports you want on it. You also want it to support DirectX11.