I have the zotac 250gts at 512 mb 256 bit ddr3 and would like to know the cards on tiger direct, they are the 610 and 620 with 2 gigs of memory, ddr3 direct11 are they any good or better than what I have. heres one (Galaxy 61TGS4HX2LTX GeForce GT 610 GC Video Card - 1GB, DDR3, PCI-Express 2.0 (x16), 1x DVI, 1x HDMI, 1x VGA, DirectX 11, NVIDIA PhsyX, NVIDIA CUDA, Overclocked) and the other Zotac GeForce GT 620 Synergy Edition ZT-60501-10L Video Card - 2GB, GDDR3, PCI-Express 2.0(x16), 2x Dual-link DVI-I, 1x mini-HDMI, DirectX 11, Single-Slot.