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Differences What are the advantages of each

Front view of Radeon HD 6490

Reasons to consider the
AMD Radeon HD 6490

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GPUBoss is not aware of any important advantages of the AMD Radeon HD 6490 vs the Nvidia GeForce GTX 850M.

Front view of GeForce GTX 850M

Reasons to consider the
Nvidia GeForce GTX 850M

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Significantly higher clock speed 902 MHz vs 550 MHz Around 65% higher clock speed
Higher effective memory clock speed 2,002 MHz vs 1,000 MHz More than 2x higher effective memory clock speed
Slightly more memory 2,048 MB vs 1,024 MB 2x more memory
Slightly better floating-point performance 1,154.6 GFLOPS vs 352 GFLOPS More than 3.2x better floating-point performance
Higher pixel rate 14.43 GPixel/s vs 4.4 GPixel/s More than 3.2x higher pixel rate
Significantly higher memory clock speed 1,001 MHz vs 500 MHz More than 2x higher memory clock speed
Higher texture rate 36.1 GTexel/s vs 8.8 GTexel/s More than 4x higher texture rate
More texture mapping units 40 vs 16 24 more texture mapping units
More render output processors 16 vs 8 Twice as many render output processors
More shading units 640 vs 320 Twice as many shading units

Features Key features of the Radeon HD 6490  vs GeForce GTX 850M 

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 6490
4.4 GPixel/s
GeForce GTX 850M
14.43 GPixel/s

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

Radeon HD 6490
8.8 GTexel/s
GeForce GTX 850M
36.1 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6490
352 GFLOPS
GeForce GTX 850M
1,154.6 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 6490  vs
GeForce GTX 850M 
GPU brand AMD Nvidia
GPU name Redwood GM107
Market Desktop Laptop
Clock speed 550 MHz 902 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 320 640
Texture mapping units 16 40
Render output processors 8 16
Pixel rate 4.4 GPixel/s 14.43 GPixel/s
Texture rate 8.8 GTexel/s 36.1 GTexel/s
Floating-point performance 352 GFLOPS 1,154.6 GFLOPS

memory

Radeon HD 6490  vs
GeForce GTX 850M 
Memory clock speed 500 MHz 1,001 MHz
Effective memory clock speed 1,000 MHz 2,002 MHz
Memory bus 128 bit 128 bit
Memory 1,024 MB 2,048 MB
Memory type DDR2 DDR3
Memory bandwidth 16 GB/s 32 GB/s

noise and power

TDP 39W 45W

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