Umm.

[NirvanaBanana]

Can i have the Sys. Req.?
Cause i'm not sure if my computer could handle this program.

[Hard core Rikki]

These were outlined in the section stickies.
GSdx' specific requirements are mentioned here

What are the system requirements? for PCSX2

We recommend the following:

Minimal Specs:
AMD 64 or Intel Pentium 4 (VM Build will not work with non SSE2 CPU's)
512MB of RAM
Pixel Shader 2.0 supporting card

Recommended Specs: (For reasonable performance in many games, but not all)
AMD64 X2 or Intel Conroe E6600+ (Multi Threading is supported in PCSX2)
512-1024MB of RAM (more RAM allows for VM mode to be stable)
Pixel Shader 2.0 supporting card (recommended GeForce 6600-8800 or equivalent ATi card)

Possible Ideal Specs:
64bit OS such as Vista or winXP64, to allow for future support of 64bit recompilers.
Future AMD or Intel Quad Core maybe needed, but currently the support of 4 threads is not handled by PCSX2, and the effect of threading out EE / VU is not yet known.
We don't forsee you requiring a GPU more powerful than the current generation of cards, up to and including the nVidia GeForce 8800.

A more in-depth guide to system specifications can be found here.

Originally Posted by Gabest

for GSdx
Minimum requirements: Pixel Shader 2.0.
Recommended: DirectX 10 level video card, Windows Vista.

Note: SSSE3 is supported by the Intel Core 2 Duo series.
Note 2: SSE4 is supported ONLY by the Intel Core 2 Duo Penryn series,meaning the E7xxx,E8xxx models for dual cores and the Q9xxx models for quad cores