EVGA GeForce GTX 780 6GB SC with ACX Cooler 6GB GDDR5 384-Bit SLI Ready Graphics Card 06G-P4-3787-KR Performance: NVIDIA GTX 780 2304 CUDA Cores 967 MHz Base Clock 1020 MHz Boost Clock 185.6GT/s Texture Fill Rate Memory: 6144 MB, 384 bit GDDR5 6008 MHz (effective) 288.38 GB/s Memory Bandwidth Interface: PCI-E 3.0 16x DVI-I, DVI-D, HDMI Resolution & Refresh: 240Hz Max Refresh Rate Max Analog : 2048x1536 Max Digital : 4096x2160 Operating System Support: Windows 8 32/64bit Windows 7 32/64bit Windows Vista 32/64bit Windows XP 32/64bit 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 Total Power Draw : 250 Watts