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When buying a cutting edge card take a close look at the dimensions. Sometimes these are so large that they won't fit into your PC case. With the high end models you will find that their capacity is much greater than any current games can use. They aren't made for today's games they are made to supply graphic resources to future games. The 2 big graphic card brands are GeForce and Radeon. Some gamers will tell you GeForce is the way to go, while others swear Radeon cards are the best. I recommend trying to match your needs to the card's stats and ignoring the brand. Sapphire Radeon HD 5970 ATI Video Card The Sapphire uses ATI Stream technology that accelerates even the most demanding of applications. This card is also able to fully support Microsoft's DirectX 11. It uses cutting edge technology to enhance the performance. This includes advanced 2GB/512-bit GDDR5 memory interface, 40nm Processor Technology, 2nd Generation TeraScale Engine, PCI 2.0 x16 bus interface. These features enhance the performance by providing better speed. It also uses dynamic power management for efficient use of resources. This is done through the ATI PowerPlay technology. Zotac GeForce GTX 480 The Zotac is NVIDIA's flagship video card. The Zotac uses advanced cinematic effects like motion blur and depth of field. All these factors combine to produce a 3D world that is very realistic. This effect is further reinforced NVIDIA PhysX effects. The NVIDIA Phys on this card runs at twice the speed of previous models. The only problem with this card is the heat management. What that means is that the fan works at 100% at all times and produces a lot of noise. This can be a bit irritating. Water cooling can be used to get rid of the problem. The combination of excellent features delivers amazing performance and graphics. The ray traced 3D rendering enables realistic images. The high speed anti-aliasing ensures that any and all ragged edges are smoothed out. View more at: http://www.techyv.com/questions/nvidia-or-ati-radeon-graphic-card