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Differences What are the advantages of each

Front view of Mobility Radeon HD 4870 X2

Reasons to consider the
ATi Mobility Radeon HD 4870 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher memory bandwidth 179.2 GB/s vs 112.2 GB/s Around 60% higher memory bandwidth
More shading units 1,600 vs 1,024 576 more shading units
Wider memory bus 512 bit vs 128 bit 4x wider memory bus
Front view of GeForce GTX 960

Reasons to consider the
Nvidia GeForce GTX 960

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Much higher clock speed 1,127 MHz vs 550 MHz More than 2x higher clock speed
Significantly higher effective memory clock speed 7,012 MHz vs 2,800 MHz More than 2.5x higher effective memory clock speed
Much higher memory clock speed 1,753 MHz vs 700 MHz More than 2.5x higher memory clock speed
Higher pixel rate 36.1 GPixel/s vs 17.6 GPixel/s More than 2x higher pixel rate
Higher texture rate 72.1 GTexel/s vs 44 GTexel/s Around 65% higher texture rate

Features Key features of the Mobility Radeon HD 4870 X2  vs GeForce GTX 960 

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

GeForce GTX 960
36.1 GPixel/s

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

GeForce GTX 960
72.1 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 960
2,308.1 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

Mobility Radeon HD 4870 X2  vs
GeForce GTX 960 
GPU brand ATI Nvidia
GPU name M98 GM206
Market Laptop Desktop
Clock speed 550 MHz 1,127 MHz
Is dual GPU Yes No
Reference card None None

raw performance

Shading units 1,600 1,024
Texture mapping units 80 64
Render output processors 32 32
Pixel rate 17.6 GPixel/s 36.1 GPixel/s
Texture rate 44 GTexel/s 72.1 GTexel/s
Floating-point performance 1,760 GFLOPS 2,308.1 GFLOPS

memory

Mobility Radeon HD 4870 X2  vs
GeForce GTX 960 
Memory clock speed 700 MHz 1,753 MHz
Effective memory clock speed 2,800 MHz 7,012 MHz
Memory bus 512 bit 128 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 179.2 GB/s 112.2 GB/s

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