AMD Radeon HD 7870M vs Intel Iris Plus Graphics 645
Graphics Processor
| GPU model | Heathrow | Coffee Lake GT3e |
|---|---|---|
| GPU variant | Heathrow XT (216-0835033) | — |
| Architecture | GCN 1.0 | Generation 9.5 |
| Foundry | TSMC | Intel |
| Manufacturing process | 28 nm | 14 nm+++ |
| Number of transistors | 1,500 million | unknown |
| Die size | 123 mm² | unknown |
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 | — |
|---|---|---|
| Memory clock | 1000 MHz 4 Gbps effective | System Shared |
| Base clock | — | 300 MHz |
| Boost clock | — | 1050 MHz |
Memory Configuration
| Memory size | 2 GB | System Shared |
|---|---|---|
| Memory type | GDDR5 | System Shared |
| Memory bus width | 128 bit | System Shared |
| Bandwidth | 64.00 GB/s | System Dependent |
Render Configuration
| Shading units | 640 | 384 |
|---|---|---|
| TMUs | 40 | 48 |
| ROPs | 16 | 6 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | — |
| Execution units | — | 48 |
Performance
| Pixel rate | 12.80 GPixel/s | 6.300 GPixel/s |
|---|---|---|
| Texture rate | 32.00 GTexel/s | 50.40 GTexel/s |
| FP32 (float) performance | 1,024 GFLOPS | 806.4 GFLOPS |
| FP64 (double) performance | 64.00 GFLOPS (1:16) | 201.6 GFLOPS (1:4) |
| FP16 (half) performance | — | 1.613 TFLOPS (2:1) |
Dimensions & Outputs
| TDP | 45 W | 15 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | IGP |
API Support & Features
| DirectX | 12 (11_1) | 12 (12_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 5.1 | 6.4 |
Other Features
Integrated Graphics
| Release date | — | Oct 7th, 2019 |
|---|---|---|
| Generation | — | HD Graphics-M (Coffee Lake) |
| Production | — | Active |
| Interface | — | Ring Bus |
| Reviews | — | 1 in our database |
