AMD Radeon RX 550X
The AMD Radeon RX 550X is a graphics card released on April 11, 2018, built on the GCN architecture. It has 512 shading units, 4 GB of GDDR5 memory on a 128-bit bus, 112.0 GB/s of memory bandwidth, a boost clock of 1.29 GHz and a 50 W board power rating. It scores 2,348 in the PassMark G3D benchmark. It supports DirectX 12 and OpenGL 4.6.
Depth: 46 recorded fields, 10 features, 5 PassMark workloads
Specification data last verified October 1, 2026 against PassMark Videocard Benchmark, AMD.com Specifications and Wikipedia GPU list tables (wikigrid-2026-09). Coverage: 10 of 10 tracked specifications recorded.
Performance
The AMD Radeon RX 550X scores 2,348 in the PassMark G3D benchmark, higher than 69% of the 2,658 GPUs benchmarked (PassMark rank #892), measured across 280 submitted results. Its PassMark G2D score is 408.
PassMark workload tests
In the PassMark workload tests the AMD Radeon RX 550X averages DirectX 9 41 fps, DirectX 10 10 fps, DirectX 11 18 fps, DirectX 12 13 fps and GPU Compute 811 ops/s, across 280 submitted results. Frames per second are PassMark test-scene rates, not game frame rates.
Theoretical throughput
AMD states a peak of FP32 (single precision) 1.65 TFLOPS, Pixel fill rate 20.6 GPixel/s and Texture fill rate 51.48 GTexel/s for the AMD Radeon RX 550X.
As stated by PassMark
PassMark's own listing for the AMD Radeon RX 550X states the PCIe 3.0 x8 interface, up to 4 GB of memory, a core clock of 1100 MHz, DirectX 12.0 and OpenGL 4.6, first benchmarked on 2019-04-14. These are PassMark's figures, shown separately from the specification tables above.
Not to be confused with
This page covers the AMD Radeon RX 550X specifically. It is a different product from AMD Radeon RX 550X 640 SP, which have their own specifications. Check the exact model name before comparing figures.
Graphics processor
The AMD Radeon RX 550X is based on the GCN architecture, uses the Polaris 12 graphics processor, contains 2,200 million transistors and has a die size of 101 mm².
Shader configuration
The AMD Radeon RX 550X has 512 shading units, 8 compute units and 16 render output units.
The AMD Radeon RX 550X does not use XMX engines; those are specific to Intel Arc graphics. Feex has no recorded ray tracing core count for the AMD Radeon RX 550X.
Clock speeds
The AMD Radeon RX 550X runs at a base clock of 1.10 GHz and boosts to 1.29 GHz.
Memory
The AMD Radeon RX 550X is equipped with 4 GB of GDDR5 memory, uses a 128-bit memory bus and delivers 112.0 GB/s of memory bandwidth.
Board and power
The AMD Radeon RX 550X has a board power rating of 50 W and it connects over PCIe 3.0 x8.
Market
The AMD Radeon RX 550X was released on April 11, 2018 and launched at a price of $79.
Benchmarks
Graphics and compute APIs
The AMD Radeon RX 550X supports DirectX 12 and OpenGL 4.6.
CUDA is an NVIDIA technology and does not apply to the AMD Radeon RX 550X. Feex has no recorded Vulkan version for the AMD Radeon RX 550X. Feex has no recorded OpenCL version for the AMD Radeon RX 550X.
Features
The AMD Radeon RX 550X has 4 supported features recorded outside the media engine. A feature that no source mentions is shown as not listed, never as unsupported.
Display features
-
Supported: AMD FreeSyncSupport for AMD's variable refresh rate technology, which syncs compatible displays to the GPU to reduce tearing and stutter.
-
Supported: HDMI 4K outputThe vendor states the GPU can drive a 4K display over HDMI.
Not listed (6)
No source Feex holds states whether the AMD Radeon RX 550X supports Stereoscopic 3D, 10-bit color output, VR ready, 8K display output, HDR output and 12-bit color output. That is silence, not a statement that they are unsupported.
The AMD Radeon RX 550X supports AMD FreeSync and HDMI 4K output under Display features.
Software and drivers
-
Supported: Radeon ChillAMD driver feature that lowers frame rate when there is little on-screen action to cut power use and heat.
-
Supported: Radeon ReLiveAMD's built-in tool for recording and streaming gameplay.
Not listed (6)
No source Feex holds states whether the AMD Radeon RX 550X supports Enhanced Sync, Image sharpening, Radeon Anti-Lag, Radeon Boost, Radeon Super Resolution and AMD Fluid Motion Frames. That is silence, not a statement that they are unsupported.
The AMD Radeon RX 550X supports Radeon Chill and Radeon ReLive under Software and drivers.
Media engine
The AMD Radeon RX 550X provides hardware encode for H.264 (AVC) and HEVC (H.265) and hardware decode for H.264 (AVC) and HEVC (H.265).
| Codec | Encode | Decode |
|---|---|---|
| H.264 (AVC)4K H.264: encode supported, decode supported | Supported | Supported |
| HEVC (H.265) | Supported | Supported |
supported explicitly not supported not stated by the vendor
Not listed: AV1 and VP9. No source Feex holds states whether the AMD Radeon RX 550X supports these codecs; that is silence, not a statement that they are unsupported.
Display outputs
The AMD Radeon RX 550X offers outputs DisplayPort 1.4 HDR, HDMI 4K60 Support, Dual Link DVI and DisplayPort 1.4.
Naming and aliases
The AMD Radeon RX 550X is also known by other names: PassMark also lists it as Radeon (TM) RX 550X and Radeon RX 550X.
Frequently asked questions
How much VRAM does the AMD Radeon RX 550X have?
The AMD Radeon RX 550X has 4 GB of GDDR5 memory on a 128-bit bus. Its memory bandwidth is 112.0 GB/s.
How much power does the AMD Radeon RX 550X use and what power supply does it need?
The AMD Radeon RX 550X has a board power rating of 50 W.
How fast is the AMD Radeon RX 550X?
The AMD Radeon RX 550X scores 2,348 in the PassMark G3D benchmark, higher than 69% of the 2,658 GPUs benchmarked. Its PassMark rank is #892. In the PassMark DirectX 12 test it averages 13 fps.
What bus interface does the AMD Radeon RX 550X use?
The AMD Radeon RX 550X connects over PCIe 3.0 x8.
When was the AMD Radeon RX 550X released and how much did it cost at launch?
The AMD Radeon RX 550X was released on April 11, 2018 and launched at a price of $79.
Similar performance
Compare the AMD Radeon RX 550X
Side-by-side specification comparisons against cards in the same performance band.