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Differences What are the advantages of each

Front view of Radeon HD 6450

Reasons to consider the
AMD Radeon HD 6450

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Significantly higher effective memory clock speed 3,200 MHz vs 1,400 MHz More than 2.2x higher effective memory clock speed
Higher memory clock speed 800 MHz vs 700 MHz Around 15% higher memory clock speed
Lower TDP 18W vs 48W 2.7x lower TDP
Front view of Radeon HD 4650

Reasons to consider the
BIOSTAR 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

Features Key features of the Radeon HD 6450  vs 4650 

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

Radeon HD 6450
25.6 GB/s
Radeon HD 4650
22.4 GB/s

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

Radeon HD 6450
2.5 GPixel/s
Radeon HD 4650
4.8 GPixel/s

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

Radeon HD 6450
5 GTexel/s
Radeon HD 4650
19.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6450
Radeon HD 4650

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


Radeon HD 6450  vs
GPU name Caicos PRO RV730
Market Desktop Desktop
Clock speed 625 MHz 600 MHz
Is dual GPU No No
Reference card None ATi Radeon HD 4650 600 MHz 256 MB

raw performance

Shading units 160 320
Texture mapping units 8 32
Render output processors 4 8
Compute units 2 4
Pixel rate 2.5 GPixel/s 4.8 GPixel/s
Texture rate 5 GTexel/s 19.2 GTexel/s
Floating-point performance 200 GFLOPS 384 GFLOPS


Radeon HD 6450  vs
Memory clock speed 800 MHz 700 MHz
Effective memory clock speed 3,200 MHz 1,400 MHz
Memory bus 64 bit 128 bit
Memory 512 MB 256 MB
Memory type GDDR5 GDDR3
Memory bandwidth 25.6 GB/s 22.4 GB/s

noise and power

TDP 18W 48W

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