Intel Iris Pro Graphics P580 vs NVIDIA GeForce 845M
Graphics Processor
| GPU model | Skylake GT4e | GM107 |
|---|---|---|
| Architecture | Generation 9.0 | Maxwell |
| Foundry | Intel | TSMC |
| Manufacturing process | 14 nm+ | 28 nm |
| Number of transistors | unknown | 1,870 million |
| Die size | unknown | 148 mm² |
| GPU variant | — | N15S-GT1R |
Integrated Graphics
| Release date | Sep 1st, 2015 | — |
|---|---|---|
| Generation | HD Graphics-WM (Skylake) | — |
| Production | Active | — |
| Interface | Ring Bus | — |
| Reviews | 1 in our database | — |
Clocks
| Base clock | 350 MHz | — |
|---|---|---|
| Boost clock | 1050 MHz | — |
| Memory clock | System Shared | 1001 MHz 2 Gbps effective |
| GPU clock | — | 863 MHz |
Memory Configuration
| Memory size | System Shared | 2 GB |
|---|---|---|
| Memory type | System Shared | DDR3 |
| Memory bus width | System Shared | 64 bit |
| Bandwidth | System Dependent | 16.02 GB/s |
Render Configuration
| Shading units | 576 | 512 |
|---|---|---|
| TMUs | 72 | 32 |
| ROPs | 9 | 16 |
| Execution units | 72 | — |
| SMM count | — | 4 |
| Cache L1 | — | 64 KB (per SMM) |
| Cache L2 | — | 1024 KB |
Performance
| Pixel rate | 9.450 GPixel/s | 13.81 GPixel/s |
|---|---|---|
| Texture rate | 75.60 GTexel/s | 27.62 GTexel/s |
| FP16 (half) performance | 2.419 TFLOPS (2:1) | — |
| FP32 (float) performance | 1,210 GFLOPS | 883.7 GFLOPS |
| FP64 (double) performance | 302.4 GFLOPS (1:4) | 27.62 GFLOPS (1:32) |
Dimensions & Outputs
| Slot width | IGP | IGP |
|---|---|---|
| TDP | 15 W | 45 W |
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 12 (12_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 6.4 | 5.1 |
| CUDA | — | 5.0 |
Other Features
Mobile graphics
| Release date | — | Feb 7th, 2015 |
|---|---|---|
| Generation | — | GeForce 800M |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | GeForce 700M |
| Successor | — | GeForce 900M |
