Radeon HD 3870 Mac 

Released June, 2008
  • 777 MHz
  • 512 MB GDDR4

Features Key features of the Radeon HD 3870 Mac

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

Radeon HD 3870 Mac
72.06 GB/s
Radeon R7 370
179.2 GB/s
GeForce GT 120 Mac
25.6 GB/s

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

Radeon HD 3870 Mac
12.43 GPixel/s
Radeon R7 370
31.2 GPixel/s
GeForce GT 120 Mac
4.4 GPixel/s

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

Radeon HD 3870 Mac
12.43 GTexel/s
Radeon R7 370
62.4 GTexel/s
GeForce GT 120 Mac
8.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3870 Mac
497.3 GFLOPS
Radeon R7 370
1,996.8 GFLOPS
GeForce GT 120 Mac

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

Radeon HD 3870 Mac

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Radeon HD 3870 Mac

Specifications Full list of technical specs


GPU brand ATI
GPU name RV670
Market Desktop
Clock speed 777 MHz
Is dual GPU No
Reference card None

raw performance

Shading units 320
Texture mapping units 16
Render output processors 16
Compute units 4
Pixel rate 12.43 GPixel/s
Texture rate 12.43 GTexel/s
Floating-point performance 497.3 GFLOPS


Memory clock speed 1,126 MHz
Effective memory clock speed 2,252 MHz
Memory bus 256 bit
Memory 512 MB
Memory type GDDR4
Memory bandwidth 72.06 GB/s

noise and power

TDP 106W
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