I've got an OLD Themaltake non PCIe 430W PSU. I'm running an Opteron 165, 4x512 MB DDR, 1 DVD-RW, 4 HDD (1 SATA, 3 IDE) a Radeon x850 and a Creative Audigy sound card. Do you think my PSU will be able to handle a 4870? I need to upgrade my mobo, cpu and ram also, but will do that in about 3...