AMD Radeon R9 255 OEM vs NVIDIA Switch GPU 20nm
Graphics Processor
| GPU model | Cape Verde | GM20B |
|---|---|---|
| GPU variant | Cape Verde PRX | ODNX02-A2 |
| Architecture | GCN 1.0 | Maxwell 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 20 nm |
| Number of transistors | 1,500 million | 2,000 million |
| Die size | 123 mm² | 118 mm² |
Graphics Card
| Release date | Dec 21st, 2013 | Mar 17th, 2017 |
|---|---|---|
| Generation | Volcanic Islands | Console GPU |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x16 | IGP |
| Predecessor | Sea Islands | — |
| Successor | Pirate Islands | — |
| Launch price | — | 299 USD |
Clocks
| Base clock | 900 MHz | 384 MHz |
|---|---|---|
| Boost clock | 930 MHz | 768 MHz |
| Memory clock | 1150 MHz 4.6 Gbps effective | 1600 MHz 3.2 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | DDR4 |
| Memory bus width | 128 bit | 64 bit |
| Bandwidth | 73.60 GB/s | 25.60 GB/s |
Render Configuration
| Shading units | 512 | 256 |
|---|---|---|
| TMUs | 32 | 16 |
| ROPs | 16 | 16 |
| Compute units | 8 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | — |
| SMM count | — | 2 |
Performance
| Pixel rate | 14.88 GPixel/s | 12.29 GPixel/s |
|---|---|---|
| Texture rate | 29.76 GTexel/s | 12.29 GTexel/s |
| FP32 (float) performance | 952.3 GFLOPS | 393.2 GFLOPS |
| FP64 (double) performance | 59.52 GFLOPS (1:16) | 12.29 GFLOPS (1:32) |
| FP16 (half) performance | — | 786.4 GFLOPS (2:1) |
Dimensions & Outputs
| Slot width | Dual-slot | IGP |
|---|---|---|
| TDP | 65 W | 15 W |
| Suggested PSU | 250 W | 350 W |
| Outputs | No outputs | No outputs |
| Power connectors | 1x 6-pin | None |
| Board number | C750 | HAC-001 |
| Length | — | 239 mm 9.4 inches |
| Width | — | 101 mm 4 inches |
| Height | — | 28 mm 1.1 inches |
| Weight | — | 0.4 kg (0.88 lbs) |
API Support & Features
| DirectX | 12 (11_1) | 12 (12_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 5.1 | 6.4 |
| CUDA | — | 5.3 |
