NVIDIA have had a great time with Kepler, top-to-bottom they have a great line up of GPUs on offer, and this line up is about to grow with another member, the GeForce GTX 650.
The GeForce GTX 650 sports the same GK107 silicon as the GeForce GT 640, but the GTX 650 sports faster GDDR5 memory. The reference board looks pretty much identical to that of the GT 640's, apart from the GTX 650 featuring a black PCB and 6-pin PCIe power connector.
Even with the new power requirement, it has the same typical power draw as the GT 640: 65W. Filling out the specs, we find that the GTX 650 sports 384 CUDA cores, 16 ROPs, and a 128-bit wide GDDR5 memory interface with 1GB of total memory.