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In reality that's true so it's strange Dell charged more for the 7970m from the get go. 7970m should be no more than $600 with heatsink where as direct order of 675m/580m is $1200 a card + almost another $200 for two if in SLI vs $1200 for 7970m in crossfire. One 7970m beats a 675m in a lot but certain games it comes close since Nvidia cards often produce higher fps with less hardware. Overclocked it's hard to say all cards are different. Brian K will be initiating a gpu comparison project which should compare better than benchmarks like 3dmark and better than most site do with their very biased game fps comparisons. But I'd say given 7970m vs 675m at similar prices for upgrade options in your alienware you should get more performance than 675m and close to same levels as two 6990m if you overclock. But don't let others numbers make you think all of them go 1ghz core for games... Most could bench near there but not play hours on end like that. I dropped to 925core 1250 mem for now on stock volts and seems to be stable at that. Core higher I get crashes under INTENSE gameplay for hours on end. I'll try to push my ram more but stay in the power envelope provided by stock volts