AMD Radeon HD 8970M vs NVIDIA GeForce GTX 680MX Mac Edition
Graphics Processor
| GPU model | Neptune | GK104 |
|---|---|---|
| GPU variant | Neptune XT (216-0847000) | N13E-GTX2-A2 |
| Architecture | GCN 1.0 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 2,800 million | 3,540 million |
| Die size | 212 mm² | 294 mm² |
Mobile graphics
| Release date | May 14th, 2013 | Oct 23rd, 2012 |
|---|---|---|
| Generation | Solar System (HD 8900M) | GeForce 600M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Predecessor | London | GeForce 500M |
| Successor | Crystal System | GeForce 700M |
Clocks
| Base clock | 850 MHz | — |
|---|---|---|
| Boost clock | 900 MHz | — |
| Memory clock | 1200 MHz 4.8 Gbps effective | 1250 MHz 5 Gbps effective |
| GPU clock | — | 719 MHz |
Memory Configuration
| Memory size | 4 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 153.6 GB/s | 160.0 GB/s |
Render Configuration
| Shading units | 1280 | 1536 |
|---|---|---|
| TMUs | 80 | 128 |
| ROPs | 32 | 32 |
| Compute units | 20 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 512 KB | 512 KB |
| SMX count | — | 8 |
Performance
| Pixel rate | 28.80 GPixel/s | 23.01 GPixel/s |
|---|---|---|
| Texture rate | 72.00 GTexel/s | 92.03 GTexel/s |
| FP32 (float) performance | 2.304 TFLOPS | 2.209 TFLOPS |
| FP64 (double) performance | 144.0 GFLOPS (1:16) | 92.03 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | MXM Module | — |
|---|---|---|
| TDP | 100 W | 122 W |
| Outputs | No outputs | No outputs |
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 |
