ATI Radeon HD 4890 vs NVIDIA GeForce GTX 285 Mac Edition
Graphics Processor
| GPU model | RV790 | GT200B |
|---|---|---|
| GPU variant | RV790 XT (215-0758016) | G200-350-B3 |
| Architecture | TeraScale | Tesla 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 55 nm |
| Number of transistors | 959 million | 1,400 million |
| Die size | 282 mm² | 470 mm² |
Graphics Card
| Release date | Apr 2nd, 2009 | Jan 15th, 2009 |
|---|---|---|
| Generation | Radeon R700 | GeForce 200 |
| Production | End-of-life | End-of-life |
| Launch price | 249 USD | — |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Reviews | 114 in our database | 88 in our database |
| Predecessor | Radeon R600 | GeForce 9 |
| Successor | Evergreen | GeForce 400 |
Clocks
| GPU clock | 850 MHz | 648 MHz |
|---|---|---|
| Memory clock | 975 MHz 3.9 Gbps effective | 1242 MHz 2.5 Gbps effective |
| Shader clock | — | 1476 MHz |
Memory Configuration
| Memory size | 1024 MB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR3 |
| Memory bus width | 256 bit | 512 bit |
| Bandwidth | 124.8 GB/s | 159.0 GB/s |
Render Configuration
| Shading units | 800 | 240 |
|---|---|---|
| TMUs | 40 | 80 |
| ROPs | 16 | 32 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | 256 KB |
| SM count | — | 30 |
Performance
| Pixel rate | 13.60 GPixel/s | 20.74 GPixel/s |
|---|---|---|
| Texture rate | 34.00 GTexel/s | 51.84 GTexel/s |
| FP32 (float) performance | 1,360 GFLOPS | 708.5 GFLOPS |
| FP64 (double) performance | 272.0 GFLOPS (1:5) | 88.56 GFLOPS (1:8) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 241 mm 9.5 inches | 267 mm 10.5 inches |
| Width | 111 mm 4.4 inches | — |
| Height | 40 mm 1.6 inches | — |
| TDP | 190 W | 204 W |
| Suggested PSU | 450 W | 550 W |
| Outputs | 2x DVI1x S-Video | 2x DVI1x S-Video |
| Power connectors | 2x 6-pin | 2x 6-pin |
| Board number | B790-31 | — |
API Support & Features
| DirectX | 10.1 (10_1) | 11.1 (10_0) |
|---|---|---|
| OpenGL | 3.3 | 3.3 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| Shader model | 4.1 | 4.0 |
| CUDA | — | 1.3 |
