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by techPowerUp! (Apr, 2009)To find the maximum overclock of our card we used a combination of ATITool's successor and our benchmarking suite.
by techPowerUp! (Apr, 2009)Many partners will be offering overclocked boards as well ranging up to 1000 MHz core speed.
Benchmarks Real world tests of the Radeon HD 4890
PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark
T-Rex (GFXBench 3.0) Data courtesy CompuBench
Sky Diver Factor Data courtesy FutureMark
Cloud Gate Factor Data courtesy FutureMark
Reviews Word on the street for the Radeon HD 4890
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Specifications Full list of technical specs
gpu
| GPU brand | ATI |
|---|---|
| GPU name | RV790 |
| Market | Desktop |
| Clock speed | 870 MHz |
| Is dual GPU | No |
| Reference card | ATi Radeon HD 4890 850 MHz 1 GB |
raw performance
| Shading units | 800 |
|---|---|
| Texture mapping units | 40 |
| Render output processors | 16 |
| Compute units | 10 |
| Pixel rate | 13.92 GPixel/s |
| Texture rate | 34.8 GTexel/s |
| Floating-point performance | 1,392 GFLOPS |
memory
| Memory clock speed | 1,050 MHz |
|---|---|
| Effective memory clock speed | 4,200 MHz |
| Memory bus | 256 bit |
| Memory | 2,048 MB |
| Memory type | GDDR5 |
| Memory bandwidth | 134.4 GB/s |
noise and power
| TDP | 190W |
|---|
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Competitors
 | Nvidia GeForce GT 1030
|
 | AMD Radeon HD 7770
|
 | Colorful GeForce GTX 650
|
 | ATi Radeon HD 5850
|
 | Nvidia GeForce GTX 550 Ti
|
 | ATi Radeon HD 5770
|
 | AMD Radeon HD 6750
|
Other Radeon HD 4890s
 | XFX Radeon HD 4890 Black Edition
|
 | ATi Radeon HD 4890
|
 | Sapphire Radeon HD 4890 Vapor-X OC
|
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