Radeon RX 6600 XT vs RX 550X 640SP
Primary Details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | not rated | 79 |
| Place by popularity | not in top-100 | 61 |
| Cost-Effectiveness Evaluation | no data | 47.49 |
| Architecture | GCN 4.0 (2016−2020) | Navi / RDNA2 (2020−2022) |
| GPU code name | Baffin | Navi 23 |
| Market segment | Desktop | Desktop |
| Release date | 11 April 2018 (6 years ago) | 30 July 2021 (2 years ago) |
| Launch price (MSRP) | no data | $379 |
| Current price | $99 | $283 (0.7x MSRP) |
Cost-Effectiveness Evaluation
Performance to price ratio. The higher, the better.
Detailed Specifications
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 640 | 2048 |
| Core clock speed | 1019 MHz | 1968 MHz |
| Boost clock speed | 1071 MHz | 2589 MHz |
| Number of transistors | 3,000 million | 11,060 million |
| Manufacturing process technology | 14 nm | 7 nm |
| Power consumption (TDP) | 60 Watt | 160 (TGP) Watt |
| Texture fill rate | 42.84 | 331.4 |
| Floating-point performance | 1,371 gflops | no data |
Form Factor & Compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 3.0 x8 | PCIe 4.0 x8 |
| Length | 145 mm | 190 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | None | 1x 8-pin |
| Memory type | GDDR5 | GDDR6 |
| Maximum RAM amount | 2 GB | 8 GB |
| Memory bus width | 128 Bit | 128 Bit |
| Memory clock speed | 6000 MHz | 16000 MHz |
| Memory bandwidth | 96 GB/s | 256.0 GB/s |
| Shared memory | no data | - |
Connectivity and Outputs
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | 1x DVI, 1x HDMI, 1x DisplayPort | 1x HDMI, 2x DisplayPort |
| HDMI | + | + |
API Compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_0) | 12.0 Ultimate (12_2) |
| Shader Model | 6.4 | 6.5 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 2.1 |
| Vulkan | 1.2.131 | 1.2 |
Pros & Cons Summary
| Recency | 11 April 2018 | 30 July 2021 |
| Maximum RAM amount | 2 GB | 8 GB |
| Chip lithography | 14 nm | 7 nm |
| Power consumption (TDP) | 60 Watt | 160 Watt |
We couldn't decide between Radeon RX 550X 640SP and Radeon RX 6600 XT. We've got no test results to judge.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with Similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
