Radeon HD 4580 

Released November, 2011
  • 796 MHz
  • 512 MB GDDR3

Features Key features of the Radeon HD 4580

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

Radeon HD 4580
22.18 GB/s
Radeon HD 6870
134.4 GB/s
Radeon HD 4650
22.4 GB/s

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

Radeon HD 4580
3.18 GPixel/s
Radeon HD 6870
29.76 GPixel/s
Radeon HD 4650
4.8 GPixel/s

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

Radeon HD 4580
6.37 GTexel/s
Radeon HD 6870
52.1 GTexel/s
Radeon HD 4650
19.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4580
191.04 GFLOPS
Radeon HD 6870
2,083.2 GFLOPS
Radeon HD 4650
384 GFLOPS

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

Radeon HD 4580
120

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

Radeon HD 4580
8

Specifications Full list of technical specs

gpu

GPU brand ATI
GPU name RV635
Market Desktop
Clock speed 796 MHz
Is dual GPU No
Reference card None

raw performance

Shading units 120
Texture mapping units 8
Render output processors 4
Compute units 3
Pixel rate 3.18 GPixel/s
Texture rate 6.37 GTexel/s
Floating-point performance 191.04 GFLOPS

memory

Memory clock speed 693 MHz
Effective memory clock speed 1,386 MHz
Memory bus 128 bit
Memory 512 MB
Memory type GDDR3
Memory bandwidth 22.18 GB/s

noise and power

TDP 65W
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