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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 1,024 MB 2x more memory
Lower TDP 30W vs 108W 3.6x lower TDP
Front view of Radeon HD 5770 Mac

Reasons to consider the
ATi Radeon HD 5770 Mac

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Much higher effective memory clock speed 4,780 MHz vs 1,800 MHz Around 2.8x higher effective memory clock speed
Higher memory bandwidth 76.48 GB/s vs 28.8 GB/s Around 2.8x higher memory bandwidth
Higher clock speed 850 MHz vs 730 MHz More than 15% higher clock speed
Better floating-point performance 1,360 GFLOPS vs 499.2 GFLOPS Around 2.8x better floating-point performance
More shading units 800 vs 320 480 more shading units
Higher texture rate 34 GTexel/s vs 15.6 GTexel/s Around 2.2x higher texture rate
Slightly higher pixel rate 13.6 GPixel/s vs 6.24 GPixel/s Around 2.2x higher pixel rate
Higher memory clock speed 1,195 MHz vs 900 MHz Around 35% higher memory clock speed
More render output processors 16 vs 8 Twice as many render output processors
More texture mapping units 40 vs 20 Twice as many texture mapping units
More compute units 10 vs 5 Twice as many compute units

Features Key features of the Radeon R7 240  vs HD 5770 Mac 

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

Radeon R7 240
28.8 GB/s
Radeon HD 5770 Mac
76.48 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 5770 Mac
13.6 GPixel/s

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

Radeon R7 240
15.6 GTexel/s
Radeon HD 5770 Mac
34 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon R7 240
499.2 GFLOPS
Radeon HD 5770 Mac
1,360 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 5770 Mac 
GPU brand AMD ATI
GPU name Oland Juniper
Market Desktop Desktop
Clock speed 730 MHz 850 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 320 800
Texture mapping units 20 40
Render output processors 8 16
Compute units 5 10
Pixel rate 6.24 GPixel/s 13.6 GPixel/s
Texture rate 15.6 GTexel/s 34 GTexel/s
Floating-point performance 499.2 GFLOPS 1,360 GFLOPS

memory

Radeon R7 240  vs
HD 5770 Mac 
Memory clock speed 900 MHz 1,195 MHz
Effective memory clock speed 1,800 MHz 4,780 MHz
Memory bus 128 bit 128 bit
Memory 2,048 MB 1,024 MB
Memory type DDR3 GDDR5
Memory bandwidth 28.8 GB/s 76.48 GB/s

noise and power

TDP 30W 108W

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