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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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Much higher effective memory clock speed 5,600 MHz vs 800 MHz 7x higher effective memory clock speed
Significantly better PassMark score 4,121 vs 126 Around 32.8x better PassMark score
Much higher memory bandwidth 179.2 GB/s vs 6.4 GB/s Around 28x higher memory bandwidth
Higher clock speed 823 MHz vs 589 MHz Around 40% higher clock speed
Better floating-point performance 1,896.2 GFLOPS vs 22.43 GFLOPS More than 84.5x better floating-point performance
Significantly higher texture rate 79 GTexel/s vs 2.36 GTexel/s More than 33.5x higher texture rate
More memory 2,048 MB vs 512 MB 4x more memory
Significantly more texture mapping units 96 vs 4 92 more texture mapping units
Much higher memory clock speed 1,400 MHz vs 400 MHz 3.5x higher memory clock speed
Significantly more render output processors 32 vs 4 28 more render output processors
Significantly more shading units 1,152 vs 8 1144 more shading units
Higher pixel rate 19.75 GPixel/s vs 2.36 GPixel/s Around 8.5x higher pixel rate
Significantly wider memory bus 256 bit vs 64 bit 4x wider memory bus
Front view of GeForce 205

Reasons to consider the
Nvidia GeForce 205

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Significantly lower TDP 31W vs 130W 4.2x lower TDP

Benchmarks Real world tests of GeForce GTX 660 vs 205

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the GeForce GTX 660  vs 205 

memory bandwidth Rate at which data can be read from or stored in onboard memory

GeForce GTX 660
179.2 GB/s
GeForce 205
6.4 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

GeForce GTX 660
19.75 GPixel/s
GeForce 205
2.36 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

GeForce GTX 660
79 GTexel/s
GeForce 205
2.36 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 660
1,896.2 GFLOPS
GeForce 205
22.43 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

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