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Differences What are the advantages of each

Front view of Radeon HD 8330E

Reasons to consider the
AMD Radeon HD 8330E

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Lower TDP 15W vs 75W 5x lower TDP
Front view of GeForce GT 640 Rebrand

Reasons to consider the
Nvidia GeForce GT 640 Rebrand

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Higher clock speed 720 MHz vs 500 MHz Around 45% higher clock speed
Slightly more memory 1,536 MB vs 512 MB 3x more memory
More render output processors 24 vs 4 20 more render output processors
Slightly higher memory bandwidth 38.4 GB/s vs 8.53 GB/s More than 4.5x higher memory bandwidth
Slightly higher effective memory clock speed 1,600 MHz vs 1,066 MHz More than 50% higher effective memory clock speed
Higher memory clock speed 800 MHz vs 533 MHz More than 50% higher memory clock speed

Features Key features of the Radeon HD 8330E  vs GeForce GT 640 Rebrand 

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

Radeon HD 8330E
2 GPixel/s
GeForce GT 640 Rebrand
4.32 GPixel/s

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

Radeon HD 8330E
4 GTexel/s
GeForce GT 640 Rebrand
17.28 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8330E
160 GFLOPS
GeForce GT 640 Rebrand
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

gpu

Radeon HD 8330E  vs
GeForce GT 640 Rebrand 
GPU brand AMD Nvidia
GPU name Kalindi GF116
Market Laptop Desktop
Clock speed 500 MHz 720 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 160 144
Texture mapping units 8 24
Render output processors 4 24
Pixel rate 2 GPixel/s 4.32 GPixel/s
Texture rate 4 GTexel/s 17.28 GTexel/s
Floating-point performance 160 GFLOPS 414.7 GFLOPS

memory

Radeon HD 8330E  vs
GeForce GT 640 Rebrand 
Memory clock speed 533 MHz 800 MHz
Effective memory clock speed 1,066 MHz 1,600 MHz
Memory bus 64 bit 192 bit
Memory 512 MB 1,536 MB
Memory type DDR3 DDR3
Memory bandwidth 8.53 GB/s 38.4 GB/s

noise and power

TDP 15W 75W

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