better buy one, since you have money to buy more grafic cards, you will have another 100$ to buy a psu.
Also i would invest in asics right now, exept if you plan on playing games too
Yeah, when you put it that way it makes more sense. I usually buy a new graphics card every 2 weeks or so, and I figured if I could skip the PSU cost now and add a new card in instead, it would boost my overall hash rate sooner. I am going to stick to GPU's and probably migrate all of them over to litecoin when ASICs drop, so I want to continue upgrading my systems. What PSU are you talking about that only costs 100$? All the ones I was looking at that will be able to support 6 graphics cards cost 200 and up.