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
GeForce GT 530
28.8 GB/s
Radeon HD 4870
115.2 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
GeForce GT 530
2.8 GPixel/s
Radeon HD 4870
12 GPixel/s

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

Radeon HD 3870 Mac
12.43 GTexel/s
Radeon HD 4870
30 GTexel/s
GeForce GT 530
11.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3870 Mac
497.3 GFLOPS
Radeon HD 4870
1,200 GFLOPS
GeForce GT 530
268.8 GFLOPS

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

Radeon HD 3870 Mac
320

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

Radeon HD 3870 Mac
16

Specifications Full list of technical specs

gpu

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

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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