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Differences What are the advantages of each

Front view of Radeon HD 8870

Reasons to consider the
AMD Radeon HD 8870

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Significantly higher effective memory clock speed 6,000 MHz vs 1,802 MHz More than 3.2x higher effective memory clock speed
Significantly higher memory bandwidth 192 GB/s vs 28.83 GB/s Around 6.8x higher memory bandwidth
Better floating-point performance 3,789 GFLOPS vs 622.1 GFLOPS More than 6x better floating-point performance
Higher clock speed 925 MHz vs 810 MHz Around 15% higher clock speed
Higher texture rate 118.4 GTexel/s vs 25.92 GTexel/s More than 4.5x higher texture rate
Significantly more shading units 2,048 vs 384 1664 more shading units
Higher pixel rate 29.6 GPixel/s vs 6.48 GPixel/s More than 4.5x higher pixel rate
Significantly more texture mapping units 128 vs 32 96 more texture mapping units
Significantly higher memory clock speed 1,500 MHz vs 901 MHz More than 65% higher memory clock speed
More render output processors 32 vs 16 Twice as many render output processors
Front view of GeForce GT 740M

Reasons to consider the
Nvidia GeForce GT 740M

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Significantly lower TDP 45W vs 185W 4.1x lower TDP

Features Key features of the Radeon HD 8870  vs GeForce GT 740M 

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

Radeon HD 8870
192 GB/s
GeForce GT 740M
28.83 GB/s

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

Radeon HD 8870
29.6 GPixel/s
GeForce GT 740M
6.48 GPixel/s

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

Radeon HD 8870
118.4 GTexel/s
GeForce GT 740M
25.92 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8870
3,789 GFLOPS
GeForce GT 740M
622.1 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

Specifications Full list of technical specs

gpu

Radeon HD 8870  vs
GeForce GT 740M 
GPU brand AMD Nvidia
GPU name Hainan XT GK107
Market Desktop Laptop
Clock speed 925 MHz 810 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 2,048 384
Texture mapping units 128 32
Render output processors 32 16
Pixel rate 29.6 GPixel/s 6.48 GPixel/s
Texture rate 118.4 GTexel/s 25.92 GTexel/s
Floating-point performance 3,789 GFLOPS 622.1 GFLOPS

memory

Radeon HD 8870  vs
GeForce GT 740M 
Memory clock speed 1,500 MHz 901 MHz
Effective memory clock speed 6,000 MHz 1,802 MHz
Memory bus 256 bit 128 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 DDR3
Memory bandwidth 192 GB/s 28.83 GB/s

noise and power

TDP 185W 45W

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