Thx for all the info ppl you have been very helpful.

Looks like I can order the low end device from BFL (5Ghash/s) your saying it will take a while to get it any timeframe?

No I do not have the GPU's lying around.

You think it would be better to invest in Asics? am I correct in assuming that this is some specialized hardware for mining (google gave me lost of running shoes )

I thought GPU  was the way to go when mining bitcoins.

I have this MB a CPU and RAM for it and 2 PSU 450w and 500w.
So I was hoping that I could potentially put a large number of GPU's on there without having to invest to much in a life support system.

Hello people the title says it all I want to build a bitcoin mining rig with this MB http://www.asus.com/Motherboards/Intel_Socket_775/P5GD2_Premium/

There are many posts giving conflicting information about the the PCI/PCI-e slots present on that MB some say I need x16 others say I don't.

1: If the later is true could I potentially use 6 gpu's in this rig?
2: how would I go about choosing the right gpu's for the job?