A PSU does not determine a graphics card, although the PSU power will limit which graphics card it can power.
Please assume that I will get a powerful and good enough PSU to power the graphics card.
The CPU = i7-3770k
Case will be big enough with good airflow and cooling.
Mobo likely ASUS P8Z77-V PRO
I need a good video card for two purposes:
1. 3D modeling using the GPU
2. Possible gaming in the future
1 to 2 screens: 1920 x 1200 (maybe 2560 x 1600)
Budget < $300
Most of the GPU programming is done using CUDA. Does this mean I shouldn't look at Radeon cards with AMD chips?
Is it true that GeForce cards run hotter than Radeon?
Assuming you have the PSU to power it, I'd strongly recommend the 2.5GB GTX 570. The 570 is officially certified for CUDA applications (specifically Adobe) without any driver hacks and the extra memory will help in both the 3D modeling and multi-monitor configurations.