I live in south africa, and I want to order a graphicscard from america a nvidia gtx 560 non ti. I heard americans use the 115v and in south africa we use the 220 volt. Will that make any difarence in a graphics card?
Make sure it is a good PSU. A quality modern PSU has full range active PFC (no little voltage switch; works on ~100V-240V) and some level of 80+ certification for efficiency. Seasonic, Antec, Corsair, XFX, and Enermax/LEPA are among the better brands. I am not sure what is available to you; FSP, OCZ, Silverstone, and NZXT have some models that qualify, but others do not. PC Power & Cooling is also mostly good. Avoid Logisys, Diablotek, Apevia and Crappermaster (Coolermaster). Most Huntkey are also bad, but a few have received favorable competent technical reviews.
80+ may not be that big a deal to a lot of people only for the efficiency alone, but I like to see it because it means the PSU could actually output what is on its label (even if only on a very good day), and do it efficiently enough that it wasn't on the ragged edge.
Thanks. That particular Truepower is the older version. I have the newer, 80+ Bronze one myself, and it works well; it is also modular, which the old one is not. The HCG is a newer model; of those two that is the one I would choose.