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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 86.4 GB/s More than 2x higher memory bandwidth
More shading units 1,600 vs 640 960 more shading units
More render output processors 32 vs 16 Twice as many render output processors
More texture mapping units 80 vs 40 Twice as many texture mapping units
Wider memory bus 512 bit vs 128 bit 4x wider memory bus
Front view of GeForce GTX 750 Ti

Reasons to consider the
Nvidia GeForce GTX 750 Ti

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Significantly higher clock speed 1,020 MHz vs 550 MHz More than 85% higher clock speed
Significantly higher effective memory clock speed 5,400 MHz vs 2,800 MHz Around 95% higher effective memory clock speed
Much higher memory clock speed 1,502 MHz vs 700 MHz Around 2.2x higher memory clock speed
Higher texture rate 82.64 GTexel/s vs 44 GTexel/s Around 90% higher texture rate

Features Key features of the Mobility Radeon HD 4870 X2  vs GeForce GTX 750 Ti 

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 750 Ti
16.32 GPixel/s

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

GeForce GTX 750 Ti
82.64 GTexel/s

floating point performance How fast the gpu can crunch numbers

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


Mobility Radeon HD 4870 X2  vs
GeForce GTX 750 Ti 
GPU brand ATI Nvidia
GPU name M98 GM107
Market Laptop Desktop
Clock speed 550 MHz 1,020 MHz
Is dual GPU Yes No
Reference card None Nvidia GeForce GTX 750 Ti 1 GHz 2 GB

raw performance

Shading units 1,600 640
Texture mapping units 80 40
Render output processors 32 16
Pixel rate 17.6 GPixel/s 16.32 GPixel/s
Texture rate 44 GTexel/s 82.64 GTexel/s
Floating-point performance 1,760 GFLOPS 1,728 GFLOPS


Mobility Radeon HD 4870 X2  vs
GeForce GTX 750 Ti 
Memory clock speed 700 MHz 1,502 MHz
Effective memory clock speed 2,800 MHz 5,400 MHz
Memory bus 512 bit 128 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 179.2 GB/s 86.4 GB/s


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