ATI Radeon HD 4870 X2 vs Intel Iris Pro Graphics P580
Graphics Processor
| GPU model | R700 | Skylake GT4e |
|---|---|---|
| GPU variant | R700 XT (215-0669045) | — |
| Architecture | TeraScale | Generation 9.0 |
| Foundry | TSMC | Intel |
| Manufacturing process | 55 nm | 14 nm+ |
| Number of transistors | 956 million | unknown |
| Die size | 256 mm² | unknown |
Graphics Card
| Release date | Aug 12th, 2008 | — |
|---|---|---|
| Generation | Radeon R700 | — |
| Production | End-of-life | — |
| Launch price | 550 USD | — |
| Interface | PCIe 2.0 x16 | — |
| Reviews | 79 in our database | — |
| Predecessor | Radeon R600 | — |
| Successor | Evergreen | — |
Clocks
| GPU clock | 750 MHz | — |
|---|---|---|
| Memory clock | 900 MHz 3.6 Gbps effective | System Shared |
| Base clock | — | 350 MHz |
| Boost clock | — | 1050 MHz |
Memory Configuration
| Memory size | 1024 MB | System Shared |
|---|---|---|
| Memory type | GDDR5 | System Shared |
| Memory bus width | 256 bit | System Shared |
| Bandwidth | 115.2 GB/s | System Dependent |
Render Configuration
| Shading units | 800 | 576 |
|---|---|---|
| TMUs | 40 | 72 |
| ROPs | 16 | 9 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | — |
| Execution units | — | 72 |
Performance
| Pixel rate | 12.00 GPixel/s | 9.450 GPixel/s |
|---|---|---|
| Texture rate | 30.00 GTexel/s | 75.60 GTexel/s |
| FP32 (float) performance | 1,200 GFLOPS | 1,210 GFLOPS |
| FP64 (double) performance | 240.0 GFLOPS (1:5) | 302.4 GFLOPS (1:4) |
| FP16 (half) performance | — | 2.419 TFLOPS (2:1) |
Dimensions & Outputs
| Slot width | Dual-slot | IGP |
|---|---|---|
| Length | 267 mm 10.5 inches | — |
| Width | 111 mm 4.4 inches | — |
| Height | 38 mm 1.5 inches | — |
| TDP | 286 W | 15 W |
| Suggested PSU | 600 W | — |
| Outputs | 2x DVI1x S-Video | No outputs |
| Power connectors | 1x 6-pin + 1x 8-pin | — |
| Board number | B509-37 | — |
API Support & Features
| DirectX | 10.1 (10_1) | 12 (12_1) |
|---|---|---|
| OpenGL | 3.3 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | — | 1.2 |
| Shader model | 4.1 | 6.4 |
Other Features
Integrated Graphics
| Release date | — | Sep 1st, 2015 |
|---|---|---|
| Generation | — | HD Graphics-WM (Skylake) |
| Production | — | Active |
| Interface | — | Ring Bus |
| Reviews | — | 1 in our database |
