AMD Radeon HD 7870M vs NVIDIA GeForce GTX 285 Mac Edition
Graphics Processor
| GPU model | Heathrow | GT200B |
|---|---|---|
| GPU variant | Heathrow XT (216-0835033) | G200-350-B3 |
| Architecture | GCN 1.0 | Tesla 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 55 nm |
| Number of transistors | 1,500 million | 1,400 million |
| Die size | 123 mm² | 470 mm² |
Mobile graphics
| Release date | Apr 24th, 2012 | — |
|---|---|---|
| Generation | London (HD 7800M) | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x16 | — |
| Predecessor | Vancouver | — |
| Successor | Solar System | — |
Clocks
| GPU clock | 800 MHz | 648 MHz |
|---|---|---|
| Memory clock | 1000 MHz 4 Gbps effective | 1242 MHz 2.5 Gbps effective |
| Shader clock | — | 1476 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR3 |
| Memory bus width | 128 bit | 512 bit |
| Bandwidth | 64.00 GB/s | 159.0 GB/s |
Render Configuration
| Shading units | 640 | 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 | 12.80 GPixel/s | 20.74 GPixel/s |
|---|---|---|
| Texture rate | 32.00 GTexel/s | 51.84 GTexel/s |
| FP32 (float) performance | 1,024 GFLOPS | 708.5 GFLOPS |
| FP64 (double) performance | 64.00 GFLOPS (1:16) | 88.56 GFLOPS (1:8) |
Dimensions & Outputs
| TDP | 45 W | 204 W |
|---|---|---|
| Outputs | No outputs | 2x DVI1x S-Video |
| Slot width | — | Dual-slot |
| Length | — | 267 mm 10.5 inches |
| Suggested PSU | — | 550 W |
| Power connectors | — | 2x 6-pin |
API Support & Features
| DirectX | 12 (11_1) | 11.1 (10_0) |
|---|---|---|
| OpenGL | 4.6 | 3.3 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | 1.2 | — |
| Shader model | 5.1 | 4.0 |
| CUDA | — | 1.3 |
Other Features
Graphics Card
| Release date | — | Jan 15th, 2009 |
|---|---|---|
| Generation | — | GeForce 200 |
| Production | — | End-of-life |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 88 in our database |
| Predecessor | — | GeForce 9 |
| Successor | — | GeForce 400 |
