What specs on a GPU should I look for?

[Hookster264]

Besides the memory size what else is important to look for:
- 128bit or 256bit?
- # of Stream Processors?
- Core clock speeds?
- Shader/Memory clock speeds?

What specs should I look at when comparing similar GPUs?

 

[patonb]

You have this topic already

http://www.techist.com/forums/f76/what-good-brand-gpu-236097/