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Differences What are the advantages of each

Front view of Mobility Radeon HD 4830

Reasons to consider the
ATi Mobility Radeon HD 4830

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Higher effective memory clock speed 2,800 MHz vs 2,016 MHz Around 40% higher effective memory clock speed
More shading units 640 vs 192 448 more shading units
Front view of GeForce GTX 260

Reasons to consider the
Nvidia GeForce GTX 260

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Higher memory bandwidth 112.9 GB/s vs 44.8 GB/s More than 2.5x higher memory bandwidth
More render output processors 28 vs 16 12 more render output processors
More texture mapping units 64 vs 32 Twice as many texture mapping units
Higher memory clock speed 1,008 MHz vs 700 MHz Around 45% higher memory clock speed
Wider memory bus 448 bit vs 128 bit 3.5x wider memory bus

Features Key features of the Mobility Radeon HD 4830  vs GeForce GTX 260 

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 260
14.5 GPixel/s

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

Mobility Radeon HD 4830
17.6 GTexel/s
GeForce GTX 260
33.15 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 260
414.7 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 4830  vs
GeForce GTX 260 
GPU brand ATI Nvidia
GPU name M97 GT200B
Market Laptop Desktop
Clock speed 550 MHz 518 MHz
Is dual GPU No No
Reference card None Nvidia GeForce GTX 260 576 MHz 896 MB

raw performance

Shading units 640 192
Texture mapping units 32 64
Render output processors 16 28
Pixel rate 8.8 GPixel/s 14.5 GPixel/s
Texture rate 17.6 GTexel/s 33.15 GTexel/s
Floating-point performance 704 GFLOPS 414.7 GFLOPS


Mobility Radeon HD 4830  vs
GeForce GTX 260 
Memory clock speed 700 MHz 1,008 MHz
Effective memory clock speed 2,800 MHz 2,016 MHz
Memory bus 128 bit 448 bit
Memory 1,024 MB 1,792 MB
Memory type GDDR5 GDDR3
Memory bandwidth 44.8 GB/s 112.9 GB/s

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