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Differences What are the advantages of each

Front view of GeForce GTX 660M

Reasons to consider the
Nvidia GeForce GTX 660M

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Significantly higher effective memory clock speed 4,000 MHz vs 1,800 MHz Around 2.2x higher effective memory clock speed
Significantly higher memory bandwidth 64 GB/s vs 28.8 GB/s Around 2.2x higher memory bandwidth
Higher clock speed 835 MHz vs 719 MHz More than 15% higher clock speed
Better floating-point performance 641.3 GFLOPS vs 276.1 GFLOPS More than 2.2x better floating-point performance
Higher texture rate 26.7 GTexel/s vs 11.5 GTexel/s More than 2.2x higher texture rate
Higher pixel rate 6.68 GPixel/s vs 2.88 GPixel/s More than 2.2x higher pixel rate
More render output processors 16 vs 8 Twice as many render output processors
More texture mapping units 32 vs 16 Twice as many texture mapping units
More shading units 384 vs 192 Twice as many shading units
Higher memory clock speed 1,000 MHz vs 900 MHz More than 10% higher memory clock speed
Front view of GeForce GT 730A

Reasons to consider the
Nvidia GeForce GT 730A

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Lower TDP 33W vs 50W Around 35% lower TDP

Features Key features of the GeForce GTX 660M  vs GT 730A 

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

GeForce GT 730A
28.8 GB/s
Just as we saw in our coverage of Nvidia's GeForce GTX 660 Ti (and the subsequent round-up, Seven GeForce GTX 660 Ti Cards: Exploring Memory Bandwidth), we face the challenge of testing the 660's pared-down memory interface.
GeForce GTX 660M | by Don-Woligroski (Sep, 2012)

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

GeForce GTX 660M
6.68 GPixel/s
GeForce GT 730A
2.88 GPixel/s
Nearly six months have passed since Nvidia launched its Kepler architecture with the GeForce GTX 680, a card that we praised for its much-improved efficiency and raw performance.
GeForce GTX 660M | by Don-Woligroski (Sep, 2012)

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

GeForce GTX 660M
26.7 GTexel/s
GeForce GT 730A
11.5 GTexel/s
Overall, the field is grouped much tighter than in previous benchmarks.
GeForce GTX 660M | by Don-Woligroski (Sep, 2012)

floating point performance How fast the gpu can crunch numbers

GeForce GTX 660M
641.3 GFLOPS
GeForce GT 730A
276.1 GFLOPS
The resulting image quality still looks good, though, and is at least intensive enough to tax these boards.
GeForce GTX 660M | by Don-Woligroski (Sep, 2012)

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

The GPU features 384 stream processors and a GPU clock of up to 850MHz, which is somewhat faster than what we’ve come to expect from the HD 7000 series.
GeForce GTX 660M | by Peter-Scott (Dec, 2012)

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

This makes it relatively easy for the company to fine-tune the GPU core/TMU/ROP ratio, and I suspect that’s what happened here.
GeForce GT 730A | by Joel-Hruska (Jun, 2013)

Specifications Full list of technical specs


GeForce GTX 660M  vs
GT 730A 
GPU brand Nvidia Nvidia
GPU name GK107 GK208
Market Laptop Laptop
Clock speed 835 MHz 719 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 384 192
Texture mapping units 32 16
Render output processors 16 8
Pixel rate 6.68 GPixel/s 2.88 GPixel/s
Texture rate 26.7 GTexel/s 11.5 GTexel/s
Floating-point performance 641.3 GFLOPS 276.1 GFLOPS


GeForce GTX 660M  vs
GT 730A 
Memory clock speed 1,000 MHz 900 MHz
Effective memory clock speed 4,000 MHz 1,800 MHz
Memory bus 128 bit 128 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 DDR3
Memory bandwidth 64 GB/s 28.8 GB/s

noise and power

TDP 50W 33W

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