Introducing the weapon of choice for gamers the EVGA Ge Force GTX 660 Ti. It adds a new dimension to the NVIDIA Kepler-powered family of graphics cards by delivering the ideal fusion of power, performance, & affordability. Experience faster, smoother, richer gaming with innovative NVIDIA technologies like TXAA antialiasing, Adaptive Vertical Sync, & Phys X. Performance NVIDIA GTX 660 Ti 1344 CUDA Cores 1046 MHz GPU 1124 MHz Boost Clock Memory 2048 MB, 192 bit GDDR5 6008 MHz (effective) 144.19 GB/s Memory Bandwidth Interface PCI-E 3.0 16x DVI-I, DVI-D, HDMI, Display-Port SLI Capable Resolution & Refresh 240 Hz Max Refresh Rate Max Analog: 2048x 1536 Max Digital: 2560x 1600 (Dual Link DVI Only) Operating System Support Windows 8 32/64bit Windows 7 32/64bit Windows Vista 32/64bit Windows XP 32/64bit Requirements Minimum of a 450 Watt power supply (Minimum recommended power supply with +12 Volt current rating of 24 Amps.) Two available 6-pin PCI-E power dongles Total Power Draw: 150 Watts