AMD Radeon R9 M270X vs NVIDIA GeForce GT 650M Mac Edition
Graphics Processor
| GPU model | Saturn | GK107 |
|---|---|---|
| GPU variant | Saturn PRO | N13P-GT-W-A2 |
| Architecture | GCN 2.0 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 2,080 million | 1,270 million |
| Die size | 160 mm² | 118 mm² |
Mobile graphics
| Release date | Feb 5th, 2015 | Jul 12th, 2012 |
|---|---|---|
| Generation | Crystal System (R9 M200) | GeForce 600M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Predecessor | Solar System | GeForce 500M |
| Successor | Mobility Radeon | GeForce 700M |
Clocks
| Base clock | 900 MHz | — |
|---|---|---|
| Boost clock | 1000 MHz | — |
| Memory clock | 1375 MHz 5.5 Gbps effective | 1254 MHz 5 Gbps effective |
| GPU clock | — | 900 MHz |
Memory Configuration
| Memory size | 2 GB | 512 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 88.00 GB/s | 80.26 GB/s |
Render Configuration
| Shading units | 768 | 384 |
|---|---|---|
| TMUs | 48 | 32 |
| ROPs | 16 | 16 |
| Compute units | 12 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 256 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 16.00 GPixel/s | 7.200 GPixel/s |
|---|---|---|
| Texture rate | 48.00 GTexel/s | 28.80 GTexel/s |
| FP32 (float) performance | 1.536 TFLOPS | 691.2 GFLOPS |
| FP64 (double) performance | 96.00 GFLOPS (1:16) | 28.80 GFLOPS (1:24) |
Dimensions & Outputs
| TDP | unknown | 45 W |
|---|---|---|
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 12 (12_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 6.3 | 5.1 |
| CUDA | — | 3.0 |
