I can't help you about the difference/where to find the oc'ed cards, but yes, you do need a heat sink for your graphics card. The graphics card effectively has it's own processor (like your CPU), and if you don't put a heatsink or fan on it, the graphics card could melt, and the temp of your other drives and chips could rise, causing them to fail...anyway....yeah, you do need a heatsink.
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"Former Clinton advisor Dick Morris said, "Hillary Clinton will be the next President, but she'll be the worst President we've ever seen." After hearing this, President Bush said, "Wait a minute, I'm not finished yet.""
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CPU: Q6600 G0 Mobo: eVGA 680i NF67-A1 Case: Antec P180B GPU: eVGA 8800GTS G92 512mb HSF: Tuniq Tower 120 RAM: 4gb DDR2-800 Corsair XMS2 4-4-4-12 PSU: Antec True Power Trio 550w
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