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Differences What are the advantages of each

Front view of Mobility Radeon HD 4850 X2

Reasons to consider the
ATi Mobility Radeon HD 4850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Wider memory bus 512 bit vs 256 bit 2x wider memory bus
Front view of GeForce GTX 770

Reasons to consider the
Nvidia GeForce GTX 770

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Much higher clock speed 1,046 MHz vs 500 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
Higher texture rate 134 GTexel/s vs 40 GTexel/s More than 3.2x higher texture rate
Better floating-point performance 3,213 GFLOPS vs 1,600 GFLOPS More than 2x better floating-point performance
Much higher memory clock speed 1,753 MHz vs 700 MHz More than 2.5x higher memory clock speed
Higher memory bandwidth 224 GB/s vs 179.2 GB/s More than 25% higher memory bandwidth
Higher pixel rate 33.5 GPixel/s vs 16 GPixel/s More than 2x higher pixel rate
More texture mapping units 128 vs 80 48 more texture mapping units

Features Key features of the Mobility Radeon HD 4850 X2  vs GeForce GTX 770 

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 770
33.5 GPixel/s

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

GeForce GTX 770
134 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 770
3,213 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


Mobility Radeon HD 4850 X2  vs
GeForce GTX 770 
GPU brand ATI Nvidia
GPU name M98 GK104
Market Laptop Desktop
Clock speed 500 MHz 1,046 MHz
Is dual GPU Yes No
Reference card None None

raw performance

Shading units 1,600 1,536
Texture mapping units 80 128
Render output processors 32 32
Pixel rate 16 GPixel/s 33.5 GPixel/s
Texture rate 40 GTexel/s 134 GTexel/s
Floating-point performance 1,600 GFLOPS 3,213 GFLOPS


Mobility Radeon HD 4850 X2  vs
GeForce GTX 770 
Memory clock speed 700 MHz 1,753 MHz
Effective memory clock speed 2,800 MHz 7,012 MHz
Memory bus 512 bit 256 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 179.2 GB/s 224 GB/s


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