AMD Radeon RX 550X vs NVIDIA GeForce GTX 675MX Mac Edition
Graphics Processor
| GPU model | Lexa | GK104 |
|---|---|---|
| GPU variant | Lexa PRO (215-0904018) | N13E-GSR-A2 |
| Architecture | GCN 4.0 | Kepler |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 28 nm |
| Number of transistors | 2,200 million | 3,540 million |
| Die size | 103 mm² | 294 mm² |
Graphics Card
| Release date | Dec 16th, 2018 | — |
|---|---|---|
| Generation | Polaris | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x8 | — |
| Predecessor | Polaris | — |
| Successor | Vega | — |
Clocks
| Base clock | 1100 MHz | — |
|---|---|---|
| Boost clock | 1183 MHz | — |
| Memory clock | 1500 MHz 6 Gbps effective | 1250 MHz 5 Gbps effective |
| GPU clock | — | 719 MHz |
Memory Configuration
| Memory size | 4 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 96.00 GB/s | 160.0 GB/s |
Render Configuration
| Shading units | 512 | 1344 |
|---|---|---|
| TMUs | 32 | 112 |
| ROPs | 16 | 32 |
| Compute units | 8 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 512 KB | 512 KB |
| SMX count | — | 7 |
Performance
| Pixel rate | 18.93 GPixel/s | 20.13 GPixel/s |
|---|---|---|
| Texture rate | 37.86 GTexel/s | 80.53 GTexel/s |
| FP16 (half) performance | 1,211 GFLOPS (1:1) | — |
| FP32 (float) performance | 1,211 GFLOPS | 1.933 TFLOPS |
| FP64 (double) performance | 75.71 GFLOPS (1:16) | 80.53 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Dual-slot | — |
|---|---|---|
| Length | 145 mm 5.7 inches | — |
| TDP | 50 W | 100 W |
| Suggested PSU | 250 W | — |
| Outputs | 1x DVI1x HDMI1x DisplayPort | No outputs |
| Power connectors | None | — |
| Board number | D090 | — |
API Support & Features
| DirectX | 12 (12_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 6.4 | 5.1 |
| CUDA | — | 3.0 |
Other Features
Mobile graphics
| Release date | — | Apr 1st, 2013 |
|---|---|---|
| Generation | — | GeForce 600M |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | GeForce 500M |
| Successor | — | GeForce 700M |
