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Features Key features of the Radeon HD 4580
memory bandwidth Rate at which data can be read from or stored in onboard memory
pixel rate Number of pixels a graphics card can render to the screen every second
texture rate Speed at which a graphics card can perform texture mapping
floating point performance How fast the gpu can crunch numbers
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
| 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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Competitors
 | ATi Radeon HD 4570
|
 | ATi Radeon HD 5450
|
 | AMD Radeon R7 240
|
 | AMD Radeon HD 7750
|
 | Nvidia GeForce GT 440
|
 | AMD Radeon HD 7770
|
 | ATi Radeon HD 4850
|
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