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Differences What are the advantages of each

Front view of Mobility Radeon HD 5145

Reasons to consider the
ATi Mobility Radeon HD 5145

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Higher clock speed 720 MHz vs 500 MHz Around 45% higher clock speed
Slightly higher effective memory clock speed 1,800 MHz vs 1,200 MHz 50% higher effective memory clock speed
Higher memory clock speed 900 MHz vs 600 MHz 50% higher memory clock speed
Lower TDP 15W vs 35W 2.3x lower TDP
Front view of Mobility Radeon HD 4650

Reasons to consider the
ATi Mobility Radeon HD 4650

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More texture mapping units 32 vs 8 24 more texture mapping units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
More shading units 320 vs 80 240 more shading units
Slightly more compute units 4 vs 1 3 more compute units

Features Key features of the Mobility Radeon HD 5145  vs 4650 

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

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

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

gpu

Mobility Radeon HD 5145  vs
4650 
GPU brand ATI ATI
GPU name M92 M96
Market Laptop Laptop
Clock speed 720 MHz 500 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 80 320
Texture mapping units 8 32
Render output processors 4 8
Compute units 1 4
Pixel rate 2.88 GPixel/s 4 GPixel/s
Texture rate 5.76 GTexel/s 16 GTexel/s
Floating-point performance 115.2 GFLOPS 320 GFLOPS

memory

Mobility Radeon HD 5145  vs
4650 
Memory clock speed 900 MHz 600 MHz
Effective memory clock speed 1,800 MHz 1,200 MHz
Memory bus 64 bit 128 bit
Memory 1,024 MB 512 MB
Memory type GDDR3 DDR2
Memory bandwidth 14.4 GB/s 19.2 GB/s

noise and power

TDP 15W 35W

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