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Differences What are the advantages of each

Front view of Radeon HD 6990M

Reasons to consider the
AMD Radeon HD 6990M

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Higher memory bandwidth 115.2 GB/s vs 80.2 GB/s Around 45% higher memory bandwidth
More render output processors 32 vs 16 Twice as many render output processors
Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus
More shading units 1,120 vs 640 480 more shading units
More texture mapping units 56 vs 40 16 more texture mapping units
Front view of GeForce GTX 960M

Reasons to consider the
Nvidia GeForce GTX 960M

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Significantly higher clock speed 1,097 MHz vs 715 MHz Around 55% higher clock speed
Higher effective memory clock speed 5,012 MHz vs 3,600 MHz Around 40% higher effective memory clock speed
Significantly higher memory clock speed 1,253 MHz vs 900 MHz Around 40% higher memory clock speed
Lower TDP 75W vs 100W 25% lower TDP

Features Key features of the Radeon HD 6990M  vs GeForce GTX 960M 

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

Radeon HD 6990M
115.2 GB/s
GeForce GTX 960M
80.2 GB/s

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

Radeon HD 6990M
22.88 GPixel/s
GeForce GTX 960M
17.55 GPixel/s

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

Radeon HD 6990M
40 GTexel/s
GeForce GTX 960M
43.9 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6990M
1,601.6 GFLOPS
GeForce GTX 960M
1,404.2 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 6990M  vs
GeForce GTX 960M 
GPU brand AMD Nvidia
GPU name Blackcomb GM107
Market Laptop Laptop
Clock speed 715 MHz 1,097 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 1,120 640
Texture mapping units 56 40
Render output processors 32 16
Pixel rate 22.88 GPixel/s 17.55 GPixel/s
Texture rate 40 GTexel/s 43.9 GTexel/s
Floating-point performance 1,601.6 GFLOPS 1,404.2 GFLOPS

memory

Radeon HD 6990M  vs
GeForce GTX 960M 
Memory clock speed 900 MHz 1,253 MHz
Effective memory clock speed 3,600 MHz 5,012 MHz
Memory bus 256 bit 128 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 115.2 GB/s 80.2 GB/s

noise and power

TDP 100W 75W

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