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Differences What are the advantages of each

Front view of Radeon HD 8830M

Reasons to consider the
AMD Radeon HD 8830M

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Slightly more memory 2,048 MB vs 1,024 MB 2x more memory
Front view of Radeon HD 5850

Reasons to consider the
ATi Radeon HD 5850

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Higher clock speed 725 MHz vs 575 MHz More than 25% higher clock speed
Higher effective memory clock speed 4,000 MHz vs 2,000 MHz 2x higher effective memory clock speed
Higher memory bandwidth 128 GB/s vs 32 GB/s 4x higher memory bandwidth
Better floating-point performance 2,088 GFLOPS vs 800 GFLOPS More than 2.5x better floating-point performance
Higher pixel rate 23.2 GPixel/s vs 10 GPixel/s More than 2.2x higher pixel rate
More shading units 1,440 vs 640 800 more shading units
More render output processors 32 vs 16 Twice as many render output processors
Slightly higher texture rate 52.2 GTexel/s vs 25 GTexel/s More than 2x higher texture rate
More texture mapping units 72 vs 40 32 more texture mapping units
More compute units 18 vs 10 8 more compute units

Features Key features of the Radeon HD 8830M  vs 5850 

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

Radeon HD 8830M
32 GB/s
Radeon HD 5850
128 GB/s

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

Radeon HD 8830M
10 GPixel/s
Radeon HD 5850
23.2 GPixel/s

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

Radeon HD 8830M
25 GTexel/s
Radeon HD 5850
52.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8830M
800 GFLOPS
Radeon HD 5850
2,088 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 8830M  vs
5850 
GPU brand AMD ATI
GPU name Venus Cypress
Market Laptop Desktop
Clock speed 575 MHz 725 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 640 1,440
Texture mapping units 40 72
Render output processors 16 32
Compute units 10 18
Pixel rate 10 GPixel/s 23.2 GPixel/s
Texture rate 25 GTexel/s 52.2 GTexel/s
Floating-point performance 800 GFLOPS 2,088 GFLOPS

memory

Radeon HD 8830M  vs
5850 
Memory clock speed 1,000 MHz 1,000 MHz
Effective memory clock speed 2,000 MHz 4,000 MHz
Memory bus 128 bit 256 bit
Memory 2,048 MB 1,024 MB
Memory type DDR3 GDDR5
Memory bandwidth 32 GB/s 128 GB/s

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