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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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Better PassMark score 4,121 vs 972 Around 4.2x better PassMark score
Significantly higher effective memory clock speed 5,600 MHz vs 1,800 MHz More than 3x higher effective memory clock speed
Significantly higher memory bandwidth 179.2 GB/s vs 14.4 GB/s Around 12.5x higher memory bandwidth
Better floating-point performance 1,896.2 GFLOPS vs 554 GFLOPS Around 3.5x better floating-point performance
Higher texture rate 79 GTexel/s vs 17.31 GTexel/s More than 4.5x higher texture rate
Significantly more texture mapping units 96 vs 16 80 more texture mapping units
More render output processors 32 vs 8 24 more render output processors
More shading units 1,152 vs 256 896 more shading units
Higher pixel rate 19.75 GPixel/s vs 8.66 GPixel/s More than 2.2x higher pixel rate
Significantly higher memory clock speed 1,400 MHz vs 900 MHz More than 55% higher memory clock speed
Wider memory bus 256 bit vs 64 bit 4x wider memory bus
Front view of GeForce 830A

Reasons to consider the
Nvidia GeForce 830A

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Higher clock speed 1,082 MHz vs 823 MHz More than 30% higher clock speed
Higher turbo clock speed 1,150 MHz vs 888 MHz Around 30% higher turbo clock speed
Significantly lower TDP 33W vs 130W 3.9x lower TDP

Benchmarks Real world tests of GeForce GTX 660 vs 830A

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the GeForce GTX 660  vs 830A 

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

GeForce GTX 660
179.2 GB/s
GeForce 830A
14.4 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 830A
8.66 GPixel/s

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

GeForce GTX 660
79 GTexel/s
GeForce 830A
17.31 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 660
1,896.2 GFLOPS
GeForce 830A
554 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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