AMD Radeon HD 8870 OEM vs ATI Radeon 9800 XT Mac Edition
Graphics Processor
| GPU model | Pitcairn | R360 |
|---|---|---|
| GPU variant | Pitcairn XT (215-0828047) | R360 (215R9RBKA11F) |
| Architecture | GCN 1.0 | Rage 9 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 150 nm |
| Number of transistors | 2,800 million | 117 million |
| Die size | 212 mm² | 218 mm² |
Graphics Card
| Release date | Jan 8th, 2013 | Mar 14th, 2004 |
|---|---|---|
| Generation | Sea Islands | Radeon R300 |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x16 | AGP Pro 8x |
| Predecessor | Southern Islands | Radeon R200 |
| Successor | Volcanic Islands | Radeon R400 AGP |
| Reviews | — | 20 in our database |
Clocks
| GPU clock | 1000 MHz | 412 MHz |
|---|---|---|
| Memory clock | 1200 MHz 4.8 Gbps effective | 365 MHz 730 Mbps effective |
Memory Configuration
| Memory size | 2 GB | 256 MB |
|---|---|---|
| Memory type | GDDR5 | DDR |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 153.6 GB/s | 23.36 GB/s |
Render Configuration
| Shading units | 1280 | — |
|---|---|---|
| TMUs | 80 | 8 |
| ROPs | 32 | 8 |
| Compute units | 20 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 512 KB | — |
| Pixel shaders | — | 8 |
| Vertex shaders | — | 4 |
Performance
| Pixel rate | 32.00 GPixel/s | 3.296 GPixel/s |
|---|---|---|
| Texture rate | 80.00 GTexel/s | 3.296 GTexel/s |
| FP32 (float) performance | 2.560 TFLOPS | — |
| FP64 (double) performance | 160.0 GFLOPS (1:16) | — |
| Vertex rate | — | 412.0 MVertices/s |
Dimensions & Outputs
| Slot width | Dual-slot | Single-slot |
|---|---|---|
| Length | 241 mm 9.5 inches | — |
| TDP | 175 W | 60 W |
| Suggested PSU | 450 W | 250 W |
| Outputs | 1x DVI1x HDMI2x mini-DisplayPort | 2x DVI |
| Power connectors | 2x 6-pin | None |
| Board number | C401 | — |
API Support & Features
| DirectX | 12 (11_1) | 9.0 |
|---|---|---|
| OpenGL | 4.6 | 2.0 |
| OpenCL | 1.2 | — |
| Vulkan | 1.2 | — |
| Shader model | 5.1 | — |
| Pixel shader | — | 2.0 |
| Vertex shader | — | 2.0 |
