XFX Radeon HD 4870 X2 2GB (QUIET EDITION) Two Powerful Radeon HD 4870 GPUs on a single Board 2.4 teraFLOPS, 512-bit GDDR5 memory bandwidth, 300 Watts Beast of a GPU Total 1600 Unified Shaders, 80 texture units, 32 ROP units, 1.912 billion transistors ATI CrossFireX technology with quad GPU support in dual mode offers superior scalability so you can take your game to new heights. Modded for Quieter Operation than reference design (Artic Silver on GPU die, Improved heat dissapation and airflow, lowered operating temperature and noise)