It looks like ASUS is joining the 4 GB GTX 960 party with their GTX 960 STRIX 4GB graphics card (STRIX-GTX960-DC2OC-4GD5). The card features 4 GB of video memory and has factory-overclocked speeds of 1291 MHz core and 1317 MHz boost. That is compared to the reference speeds of 1126/1178 MHz.
The DirectCU II STRIX cooling solution features a nice aluminum heatsink that is ventilated by a pair of fans that actually stay off until a temperature threshold is reached. So the card can be completely silent at times. The card also has a nice backplate that helps cool the memory chips on the back of the card. Power to the card comes by way of a 6pin PCI-Express power connector.
No word yet on pricing or availability.