Stefan Mileschin

MSI introduced a 4 GB model of its GeForce GTX 680 Twin Frozr graphics card (model: N680GTX Twin Frozr 4GD5). The card is further available in standard (1006/1058 MHz core/GPU Boost) and OC (1058/1124 MHz core/GPU Boost) variants. The 4 GB of memory, spread across a 256-bit wide memory interface, is clocked at 6008 MHz (GDDR5-effective) on both variants. The card appears to make use of a custom-design PCB by MSI, which draws power from two 6-pin PCIe power connectors, and the company's trusty Twin Frozr III cooling solution, which has been featured on several of its high-end graphics cards. The new 4 GB variants could cost about 20% higher than their 2 GB counterparts.

http://www.techpowerup.com/169699/MS...hics-Card.html