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Differences What are the advantages of each

Front view of Radeon HD 7750

Reasons to consider the
AMD Radeon HD 7750

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Significantly lower TDP 55W vs 175W 3.2x lower TDP
Slightly higher memory clock speed 1,125 MHz vs 1,050 MHz More than 5% higher memory clock speed
Front view of Radeon HD 6870 1600SP

Reasons to consider the
Sapphire Radeon HD 6870 1600SP

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Higher memory bandwidth 134.4 GB/s vs 72 GB/s More than 85% higher memory bandwidth
Better floating-point performance 2,880 GFLOPS vs 819.2 GFLOPS More than 3.5x better floating-point performance
Higher clock speed 900 MHz vs 800 MHz Around 15% higher clock speed
Higher texture rate 72 GTexel/s vs 25.6 GTexel/s More than 2.8x higher texture rate
Significantly more shading units 1,600 vs 512 1088 more shading units
Higher pixel rate 28.8 GPixel/s vs 12.8 GPixel/s 2.2x higher pixel rate
More texture mapping units 80 vs 32 48 more texture mapping units
More render output processors 32 vs 16 Twice as many render output processors
More compute units 20 vs 8 12 more compute units
Wider memory bus 256 bit vs 128 bit 2x wider memory bus

Features Key features of the Radeon HD 7750  vs 6870 1600SP 

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

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

Radeon HD 7750
12.8 GPixel/s
Radeon HD 6870 1600SP
28.8 GPixel/s

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

Radeon HD 7750
25.6 GTexel/s
Radeon HD 6870 1600SP
72 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 7750
819.2 GFLOPS
Radeon HD 6870 1600SP
2,880 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 7750  vs
6870 1600SP 
GPU brand AMD AMD
GPU name Cape Verde PRO Cypress
Market Desktop Desktop
Clock speed 800 MHz 900 MHz
Is dual GPU No No
Reference card None AMD Radeon HD 6870 1600SP Edition 850 MHz 1 GB

raw performance

Shading units 512 1,600
Texture mapping units 32 80
Render output processors 16 32
Compute units 8 20
Pixel rate 12.8 GPixel/s 28.8 GPixel/s
Texture rate 25.6 GTexel/s 72 GTexel/s
Floating-point performance 819.2 GFLOPS 2,880 GFLOPS

memory

Radeon HD 7750  vs
6870 1600SP 
Memory clock speed 1,125 MHz 1,050 MHz
Effective memory clock speed 4,500 MHz 4,200 MHz
Memory bus 128 bit 256 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR5 GDDR5
Memory bandwidth 72 GB/s 134.4 GB/s

noise and power

TDP 55W 175W

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