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Differences What are the advantages of each

Front view of Radeon R9 290X

Reasons to consider the
AMD Radeon R9 290X

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Much higher memory bandwidth 320 GB/s vs 153.6 GB/s More than 2x higher memory bandwidth
Significantly better floating-point performance 5,632 GFLOPS vs 2,720 GFLOPS More than 2x better floating-point performance
Significantly higher texture rate 176 GTexel/s vs 68 GTexel/s More than 2.5x higher texture rate
More memory 4,096 MB vs 2,048 MB 2x more memory
Higher clock speed 1,000 MHz vs 850 MHz Around 20% higher clock speed
Significantly higher pixel rate 64 GPixel/s vs 27.2 GPixel/s More than 2.2x higher pixel rate
Many more texture mapping units 176 vs 80 96 more texture mapping units
Significantly more render output processors 64 vs 32 Twice as many render output processors
Significantly more shading units 2,816 vs 1,600 1216 more shading units
Significantly more compute units 44 vs 20 24 more compute units
Much wider memory bus 512 bit vs 256 bit 2x wider memory bus
Front view of Radeon HD 5770 X2

Reasons to consider the
Generic Radeon HD 5770 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU

Features Key features of the Radeon R9 290X  vs HD 5770 X2 

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

Radeon R9 290X
320 GB/s
Radeon HD 5770 X2
153.6 GB/s

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

Radeon R9 290X
64 GPixel/s
Radeon HD 5770 X2
27.2 GPixel/s

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

Radeon R9 290X
176 GTexel/s
Radeon HD 5770 X2
68 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon R9 290X
5,632 GFLOPS
Radeon HD 5770 X2
2,720 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 R9 290X  vs
HD 5770 X2 
GPU brand AMD ATI
GPU name Hawaii Juniper
Market Desktop Desktop
Clock speed 1,000 MHz 850 MHz
Is dual GPU No Yes
Reference card None ATi Radeon HD 5770 X2 850 MHz 2 GB

raw performance

Shading units 2,816 1,600
Texture mapping units 176 80
Render output processors 64 32
Compute units 44 20
Pixel rate 64 GPixel/s 27.2 GPixel/s
Texture rate 176 GTexel/s 68 GTexel/s
Floating-point performance 5,632 GFLOPS 2,720 GFLOPS

memory

Radeon R9 290X  vs
HD 5770 X2 
Memory clock speed 1,250 MHz 1,200 MHz
Effective memory clock speed 5,000 MHz 4,800 MHz
Memory bus 512 bit 256 bit
Memory 4,096 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 320 GB/s 153.6 GB/s

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