Stefan Mileschin

The EVGA GeForce GTX 770 of course is based on the same GK-104 graphics processor and packs in 1536 CUDA cores, 32 ROPs, 128 Texture units and has a 2GB frame buffer that runs on a 256-bit bus. The EVGA model though runs both the memory and GPU engines at higher frequencies and it also utilizes, EVGA's latest thermal design; the EVGA ACX Cooler. This cooler uses a double ball bearing design that redefines traditional enthusiast coolers. Starting with a 40% increase in heatsink volume, the EVGA ACX is more efficient at dissipating heat, allowing for 15% lower GPU temperatures. A reinforcement baseplate maintains a straight PCB, and helps lower MOSFET temperatures by 7% and memory temperatures by 15%.

http://www.rwlabs.com/article.php?id=831