Galaxy's GeForce GTX 970 has 4GB GDDR5 memory and features high-grade VRM that draws power from a combination of 8-pin and 6-pin PCIe power connectors. A GPU-Z readout reveals the card has 1664 CUDA cores, 138 TMUs, 32 ROPs, a 256-bit memory bus, 1051MHz core clockspeed, 1178MHz Boost, and 4GB GDDR5 memory clocked at 7012MHz.
A 3DMark 11 Extreme benchmark puts the card somewhere between the GTX 780 and GTX 780 Ti:
The sample was put through a quick run of 3DMark 11 Extreme Preset. It scored X3963 points, which if you factor in the dual-core Core i3-4130 used in the bench, puts the GTX 970 somewhere between the GTX 780 and GTX 780 Ti, in terms of performance.