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Differences What are the advantages of each

Front view of Radeon R7 240

Reasons to consider the
AMD Radeon R7 240

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More memory 2,048 MB vs 512 MB 4x more memory
Lower TDP 30W vs 106W 3.5x lower TDP
Front view of Radeon HD 3870

Reasons to consider the
Sapphire Radeon HD 3870

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Higher memory bandwidth 76.8 GB/s vs 28.8 GB/s Around 2.8x higher memory bandwidth
Higher clock speed 825 MHz vs 730 MHz Around 15% higher clock speed
Higher effective memory clock speed 2,400 MHz vs 1,800 MHz Around 35% higher effective memory clock speed
Higher memory clock speed 1,200 MHz vs 900 MHz Around 35% higher memory clock speed
Wider memory bus 256 bit vs 128 bit 2x wider memory bus
Slightly higher pixel rate 13.2 GPixel/s vs 6.24 GPixel/s More than 2x higher pixel rate
More render output processors 16 vs 8 Twice as many render output processors

Features Key features of the Radeon R7 240  vs HD 3870 

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

Radeon R7 240
28.8 GB/s
Radeon HD 3870
76.8 GB/s

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

Radeon R7 240
6.24 GPixel/s
Radeon HD 3870
13.2 GPixel/s

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

Radeon R7 240
15.6 GTexel/s
Radeon HD 3870
13.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon R7 240
499.2 GFLOPS
Radeon HD 3870
528 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 R7 240  vs
HD 3870 
GPU brand AMD ATI
GPU name Oland RV670 XT
Market Desktop Desktop
Clock speed 730 MHz 825 MHz
Is dual GPU No No
Reference card None ATi Radeon HD 3870 777 MHz 512 MB

raw performance

Shading units 320 320
Texture mapping units 20 16
Render output processors 8 16
Compute units 5 4
Pixel rate 6.24 GPixel/s 13.2 GPixel/s
Texture rate 15.6 GTexel/s 13.2 GTexel/s
Floating-point performance 499.2 GFLOPS 528 GFLOPS

memory

Radeon R7 240  vs
HD 3870 
Memory clock speed 900 MHz 1,200 MHz
Effective memory clock speed 1,800 MHz 2,400 MHz
Memory bus 128 bit 256 bit
Memory 2,048 MB 512 MB
Memory type DDR3 GDDR4
Memory bandwidth 28.8 GB/s 76.8 GB/s

noise and power

TDP 30W 106W

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