AMD Radeon HD 8870M vs NVIDIA GeForce GT 755M Mac Edition
Graphics Processor
| GPU model | Venus | GK107 |
|---|---|---|
| GPU variant | Venus XT | GT 755M |
| Architecture | GCN 1.0 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 1,500 million | 1,270 million |
| Die size | 123 mm² | 118 mm² |
Mobile graphics
| Release date | Apr 1st, 2013 | Nov 8th, 2013 |
|---|---|---|
| Generation | Solar System (HD 8800M) | GeForce 700M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Predecessor | London | GeForce 600M |
| Successor | Crystal System | GeForce 800M |
Clocks
| Base clock | 725 MHz | — |
|---|---|---|
| Boost clock | 775 MHz | — |
| Memory clock | 1125 MHz 4.5 Gbps effective | 1250 MHz 5 Gbps effective |
| GPU clock | — | 1085 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 72.00 GB/s | 80.00 GB/s |
Render Configuration
| Shading units | 640 | 384 |
|---|---|---|
| TMUs | 40 | 32 |
| ROPs | 16 | 16 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 256 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 12.40 GPixel/s | 8.680 GPixel/s |
|---|---|---|
| Texture rate | 31.00 GTexel/s | 34.72 GTexel/s |
| FP32 (float) performance | 992.0 GFLOPS | 833.3 GFLOPS |
| FP64 (double) performance | 62.00 GFLOPS (1:16) | 34.72 GFLOPS (1:24) |
Dimensions & Outputs
| TDP | unknown | 50 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | MXM Module |
API Support & Features
| DirectX | 12 (11_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 5.1 | 5.1 |
| CUDA | — | 3.0 |
