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Differences What are the advantages of each

Front view of Radeon HD 6750

Reasons to consider the
AMD Radeon HD 6750

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Significantly higher effective memory clock speed 4,600 MHz vs 2,484 MHz More than 85% higher effective memory clock speed
More shading units 720 vs 240 Three times as many shading units
Significantly lower TDP 86W vs 204W 2.4x lower TDP
Front view of GeForce GTX 285 Mac

Reasons to consider the
Nvidia GeForce GTX 285 Mac

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Significantly higher memory bandwidth 159 GB/s vs 73.6 GB/s Around 2.2x higher memory bandwidth
Much wider memory bus 512 bit vs 128 bit 4x wider memory bus
More texture mapping units 80 vs 36 44 more texture mapping units
Higher texture rate 51.84 GTexel/s vs 25.2 GTexel/s More than 2x higher texture rate
More render output processors 32 vs 16 Twice as many render output processors
Higher pixel rate 20.74 GPixel/s vs 11.2 GPixel/s More than 85% higher pixel rate
Higher memory clock speed 1,242 MHz vs 1,150 MHz Around 10% higher memory clock speed

Features Key features of the Radeon HD 6750  vs GeForce GTX 285 Mac 

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

Radeon HD 6750
73.6 GB/s

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

Radeon HD 6750
11.2 GPixel/s
GeForce GTX 285 Mac
20.74 GPixel/s

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

Radeon HD 6750
25.2 GTexel/s
GeForce GTX 285 Mac
51.84 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6750
1,008 GFLOPS
GeForce GTX 285 Mac
708.5 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 6750  vs
GeForce GTX 285 Mac 
GPU brand AMD Nvidia
GPU name Juniper PRO GT200 B3
Market Desktop Desktop
Clock speed 700 MHz 648 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 720 240
Texture mapping units 36 80
Render output processors 16 32
Pixel rate 11.2 GPixel/s 20.74 GPixel/s
Texture rate 25.2 GTexel/s 51.84 GTexel/s
Floating-point performance 1,008 GFLOPS 708.5 GFLOPS

memory

Radeon HD 6750  vs
GeForce GTX 285 Mac 
Memory clock speed 1,150 MHz 1,242 MHz
Effective memory clock speed 4,600 MHz 2,484 MHz
Memory bus 128 bit 512 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR5 GDDR3
Memory bandwidth 73.6 GB/s 159 GB/s

noise and power

TDP 86W 204W

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