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Differences What are the advantages of each

Front view of GeForce GTX 660

Reasons to consider the
Nvidia GeForce GTX 660

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Significantly better PassMark score 4,121 vs 652 More than 6.2x better PassMark score
Much higher memory bandwidth 179.2 GB/s vs 54.4 GB/s More than 3.2x higher memory bandwidth
Higher clock speed 823 MHz vs 550 MHz Around 50% higher clock speed
Significantly higher effective memory clock speed 5,600 MHz vs 3,400 MHz Around 65% higher effective memory clock speed
Much better cloud gate factor score 19.42 vs 9.37 More than 2x better cloud gate factor score
Better floating-point performance 1,896.2 GFLOPS vs 257.3 GFLOPS More than 7.2x better floating-point performance
Higher texture rate 79 GTexel/s vs 17.6 GTexel/s Around 4.5x higher texture rate
More memory 2,048 MB vs 1,024 MB 2x more memory
Significantly more shading units 1,152 vs 96 1056 more shading units
Significantly more render output processors 32 vs 8 24 more render output processors
Significantly more texture mapping units 96 vs 32 Three times as many texture mapping units
Higher pixel rate 19.75 GPixel/s vs 4.4 GPixel/s Around 4.5x higher pixel rate
Significantly higher memory clock speed 1,400 MHz vs 850 MHz Around 65% higher memory clock speed
Better PassMark direct compute score 1,948 vs 638 More than 3x better PassMark direct compute score
Slightly wider memory bus 256 bit vs 128 bit 2x wider memory bus
Front view of GeForce GT 240

Reasons to consider the
Nvidia GeForce GT 240

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Lower TDP 69W vs 130W More than 45% lower TDP

Benchmarks Real world tests of GeForce GTX 660 vs GT 240

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

GeForce GTX 660
GeForce GT 240

Cloud Gate Factor Data courtesy FutureMark

PassMark Direct Compute Measures performance of general-purpose computing using Microsoft DirectCompute

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