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Differences What are the advantages of each

Front view of Radeon R9 290

Reasons to consider the
AMD Radeon R9 290

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Much higher memory bandwidth 320 GB/s vs 96 GB/s More than 3.2x higher memory bandwidth
Better floating-point performance 4,800 GFLOPS vs 1,536 GFLOPS Around 3.2x better floating-point performance
Significantly higher pixel rate 60.6 GPixel/s vs 16 GPixel/s More than 3.8x higher pixel rate
Higher texture rate 152 GTexel/s vs 48 GTexel/s Around 3.2x higher texture rate
Many more render output processors 64 vs 16 48 more render output processors
Significantly more shading units 2,560 vs 768 1792 more shading units
Significantly more texture mapping units 160 vs 48 112 more texture mapping units
Significantly more compute units 40 vs 12 28 more compute units
Wider memory bus 512 bit vs 128 bit 4x wider memory bus
Front view of Radeon E8870

Reasons to consider the
AMD Radeon E8870

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Higher effective memory clock speed 6,000 MHz vs 5,000 MHz 20% higher effective memory clock speed
Higher memory clock speed 1,500 MHz vs 1,125 MHz Around 35% higher memory clock speed
Much lower TDP 75W vs 300W 4x lower TDP

Features Key features of the Radeon R9 290  vs E8870 

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

Radeon R9 290
320 GB/s
Radeon E8870
96 GB/s

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

Radeon R9 290
60.6 GPixel/s
Radeon E8870
16 GPixel/s

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

Radeon R9 290
152 GTexel/s
Radeon E8870
48 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon R9 290
4,800 GFLOPS
Radeon E8870
1,536 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 290  vs
E8870 
GPU brand AMD AMD
GPU name Hawaii Saturn
Market Desktop Laptop
Clock speed 947 MHz 1,000 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 2,560 768
Texture mapping units 160 48
Render output processors 64 16
Compute units 40 12
Pixel rate 60.6 GPixel/s 16 GPixel/s
Texture rate 152 GTexel/s 48 GTexel/s
Floating-point performance 4,800 GFLOPS 1,536 GFLOPS

memory

Radeon R9 290  vs
E8870 
Memory clock speed 1,125 MHz 1,500 MHz
Effective memory clock speed 5,000 MHz 6,000 MHz
Memory bus 512 bit 128 bit
Memory 4,096 MB 4,096 MB
Memory type GDDR5 GDDR5
Memory bandwidth 320 GB/s 96 GB/s

noise and power

TDP 300W 75W

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