AMD Radeon RX 550 640SP vs NVIDIA GeForce GTX 660 Rev. 2
Graphics Processor
| GPU model | Baffin | GK104 |
|---|---|---|
| GPU variant | Baffin LE | — |
| Architecture | GCN 4.0 | Kepler |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 28 nm |
| Number of transistors | 3,000 million | 3,540 million |
| Die size | 123 mm² | 294 mm² |
Graphics Card
| Release date | Oct 13th, 2017 | Sep 13th, 2014 |
|---|---|---|
| Generation | Polaris | GeForce 600 |
| Production | Active | End-of-life |
| Interface | PCIe 3.0 x8 | PCIe 3.0 x16 |
| Predecessor | Arctic Islands | GeForce 500 |
| Successor | Vega | GeForce 700 |
| Reviews | — | 77 in our database |
Clocks
| Base clock | 1019 MHz | 980 MHz |
|---|---|---|
| Boost clock | 1071 MHz | 1032 MHz |
| Memory clock | 1500 MHz 6 Gbps effective | 1502 MHz 6 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 192 bit |
| Bandwidth | 96.00 GB/s | 144.2 GB/s |
Render Configuration
| Shading units | 640 | 960 |
|---|---|---|
| TMUs | 40 | 80 |
| ROPs | 16 | 24 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 1024 KB | 384 KB |
| SMX count | — | 5 |
Performance
| Pixel rate | 17.14 GPixel/s | 20.64 GPixel/s |
|---|---|---|
| Texture rate | 42.84 GTexel/s | 82.56 GTexel/s |
| FP16 (half) performance | 1,371 GFLOPS (1:1) | — |
| FP32 (float) performance | 1,371 GFLOPS | 1.981 TFLOPS |
| FP64 (double) performance | 85.68 GFLOPS (1:16) | 82.56 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 145 mm 5.7 inches | 241 mm 9.5 inches |
| TDP | 60 W | 140 W |
| Suggested PSU | 250 W | 300 W |
| Outputs | 1x DVI1x HDMI1x DisplayPort | 2x DVI1x HDMI1x DisplayPort |
| Power connectors | None | 1x 6-pin |
| Board number | D090-21 | P2004 SKU 11 |
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 |
