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Differences What are the advantages of each

Front view of Radeon HD 6390

Reasons to consider the
AMD Radeon HD 6390

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Higher clock speed 550 MHz vs 398 MHz Around 40% higher clock speed
Slightly more memory 1,024 MB vs 256 MB 4x more memory
More shading units 320 vs 40 280 more shading units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Slightly more texture mapping units 16 vs 4 12 more texture mapping units
Front view of Radeon HD 2400

Reasons to consider the
ATi Radeon HD 2400

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Slightly lower TDP 20W vs 39W Around 50% lower TDP

Features Key features of the Radeon HD 6390  vs 2400 

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

Radeon HD 6390
16 GB/s
Radeon HD 2400
7.92 GB/s

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

Radeon HD 6390
4.4 GPixel/s
Radeon HD 2400
1.59 GPixel/s

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

Radeon HD 6390
8.8 GTexel/s
Radeon HD 2400
1.59 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6390
352 GFLOPS
Radeon HD 2400
31.84 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 6390  vs
2400 
GPU brand AMD ATI
GPU name Redwood LE RV610
Market Desktop Desktop
Clock speed 550 MHz 398 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 320 40
Texture mapping units 16 4
Render output processors 8 4
Compute units 4 2
Pixel rate 4.4 GPixel/s 1.59 GPixel/s
Texture rate 8.8 GTexel/s 1.59 GTexel/s
Floating-point performance 352 GFLOPS 31.84 GFLOPS

memory

Radeon HD 6390  vs
2400 
Memory clock speed 500 MHz 495 MHz
Effective memory clock speed 1,000 MHz 990 MHz
Memory bus 128 bit 64 bit
Memory 1,024 MB 256 MB
Memory type DDR2 DDR2
Memory bandwidth 16 GB/s 7.92 GB/s

noise and power

TDP 39W 20W

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