EVGA GeForce GTX TITAN Hydro Copper Signature 6GB GDDR5 384 Bit Graphics Cards, Black 06G-P4-3799-KR Performance NVIDIA GTX TITAN BLACK2880 CUDA Cores1006 MHz Base Clock1111 MHz Boost Clock MemoryMemory:6144 MB, 384 bit GDDR57000 MHz (effective)336 GB/s Memory Bandwidth Interface PCI-E 3.0 16xDVI-I, DVI-D, HDMI, Display Port Resolution & Refresh240Hz Max Refresh Rate Max Analog : 2048x1536Max Digital : 4096x2160 Operating System Support Windows 8 32/64bitWindows 7 32/64bitWindows Vista 32/64bitWindows XP 32/64bit DirectX 12 (feature level 11_0) Requirements: Minimum of a 600 Watt power supply.(Minimum recommended power supply with +12 Volt current rating of 42 Amps.)An available 6-pin PCI-E power connector and an available 8 pin PCI-E power connector