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Differences What are the advantages of each

Front view of Radeon HD 4650

Reasons to consider the
BIOSTAR Radeon HD 4650

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More texture mapping units 32 vs 16 Twice as many texture mapping units
More shading units 320 vs 96 224 more shading units
Slightly lower TDP 48W vs 65W More than 25% lower TDP
Front view of GeForce GT 630

Reasons to consider the
EVGA GeForce GT 630

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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 clock speed 810 MHz vs 600 MHz 35% higher clock speed
Higher memory bandwidth 51.2 GB/s vs 22.4 GB/s More than 2.2x higher memory bandwidth
Slightly more memory 1,024 MB vs 256 MB 4x more memory
Higher memory clock speed 800 MHz vs 700 MHz Around 15% higher memory clock speed

Features Key features of the Radeon HD 4650  vs GeForce GT 630 

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

Radeon HD 4650
22.4 GB/s
GeForce GT 630
51.2 GB/s

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

Radeon HD 4650
4.8 GPixel/s
GeForce GT 630
3.24 GPixel/s

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

Radeon HD 4650
19.2 GTexel/s
GeForce GT 630
12.96 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4650
384 GFLOPS
GeForce GT 630
311.04 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 4650  vs
GeForce GT 630 
GPU brand ATI Nvidia
GPU name RV730 GF108
Market Desktop Desktop
Clock speed 600 MHz 810 MHz
Is dual GPU No No
Reference card ATi Radeon HD 4650 600 MHz 256 MB Nvidia GeForce GT 630 810 MHz 1 GB

raw performance

Shading units 320 96
Texture mapping units 32 16
Render output processors 8 4
Pixel rate 4.8 GPixel/s 3.24 GPixel/s
Texture rate 19.2 GTexel/s 12.96 GTexel/s
Floating-point performance 384 GFLOPS 311.04 GFLOPS

memory

Radeon HD 4650  vs
GeForce GT 630 
Memory clock speed 700 MHz 800 MHz
Effective memory clock speed 1,400 MHz 3,200 MHz
Memory bus 128 bit 128 bit
Memory 256 MB 1,024 MB
Memory type GDDR3 GDDR5
Memory bandwidth 22.4 GB/s 51.2 GB/s

noise and power

TDP 48W 65W

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