AMD Radeon Pro 580X vs AMD Radeon RX 6550M Comparison

The Verdict

The AMD Radeon RX 6550M is the clear performance winner in this comparison. Across the two shared benchmark tests, it wins both, with a 16.8% lead in OpenCL and a 26.8% lead in Vulkan. The RX 6550M also ranks higher overall, sitting at the 85th percentile among all GPUs, while the Radeon Pro 580X sits at the 82nd percentile. The RX 6550M is the pick for any workload where compute throughput or modern API support matters. The Radeon Pro 580X, however, remains relevant for its larger memory pool and its Metal benchmark capability, which the RX 6550M does not have recorded. For users locked into a Mac environment with the Pro 580X already installed, its 8 GB frame buffer and mature driver support give it a niche, but the data shows the RX 6550M is the more capable processor in raw compute terms.

Architecture Differences

The two GPUs come from entirely different architectural eras. The RX 6550M is built on RDNA 2.0, using the Navi 24 chip manufactured on a 6 nm process at TSMC. The Radeon Pro 580X uses the Ellesmere chip, based on the much older GCN 4.0 architecture, built on a 14 nm process at GlobalFoundries. This node difference is stark: the RX 6550M packs 5,400 million transistors into a 107 mm² die, yielding a transistor density of 50.5 million per mm². The Pro 580X has 5,700 million transistors spread across a 232 mm² die, with a density of just 24.6 million per mm². The RX 6550M is more than twice as dense, reflecting the efficiency gains of newer manufacturing.

Core counts tell a different story. The Pro 580X has 2,304 shading units, 144 texture mapping units, and 32 ROPs. The RX 6550M has only 1,024 shading units, 64 TMUs, and 32 ROPs. Despite having fewer than half the shaders, the RX 6550M still produces comparable raw throughput. Its FP32 performance is listed at 5.816 TFLOPS, slightly ahead of the Pro 580X's 5.530 TFLOPS. The RX 6550M also features 16 dedicated ray tracing cores, while the Pro 580X has none. This is a fundamental feature gap: the RX 6550M supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Pro 580X is limited to DirectX 12 (12_0) and Vulkan 1.3. Both support OpenGL 4.6.

Memory configurations are also divergent. The RX 6550M uses 4 GB of GDDR6 on a 64-bit bus, delivering 144.0 GB/s of bandwidth. The Pro 580X uses 8 GB of GDDR5 on a 256-bit bus, delivering 218.9 GB/s. The Pro 580X has double the capacity and substantially more bandwidth, which matters for large datasets. Clock speeds are much higher on the RX 6550M: a 2000 MHz base and 2840 MHz boost, versus 1100 MHz base and 1200 MHz boost for the Pro 580X. Memory clocks also differ, with the RX 6550M running at 18 Gbps effective versus 6.8 Gbps on the Pro 580X.

Head-to-Head Benchmarks

The recorded data includes two shared tests: Geekbench OpenCL and Geekbench Vulkan. In OpenCL, the RX 6550M scores 42,536, beating the Pro 580X's 36,426 by 16.8%. In Vulkan, the gap widens to 26.8%, with the RX 6550M scoring 50,867 against 40,115. These are decisive margins. The RX 6550M's Vulkan score is particularly strong, showing a 19.6% improvement over its own OpenCL result, while the Pro 580X improves by only 10.1% when moving from OpenCL to Vulkan. This suggests the RDNA 2.0 architecture scales better with modern APIs.

The Pro 580X does have one recorded benchmark the RX 6550M lacks: Geekbench Metal, where it scores 39,577. This is its best result across all three tests, but it still falls short of the RX 6550M's OpenCL score. The average benchmark score tells a similar story. The RX 6550M averages 46,702 across its two tests, while the Pro 580X averages 38,706 across its three. The RX 6550M's average is 20.7% higher. In terms of nearest rivals, the RX 6550M sits just 0.2% ahead of both the Intel Arc A530M and the AMD Radeon RX 5600M, and 1.4% ahead of the NVIDIA RTX A2000. The Pro 580X is effectively tied with the NVIDIA GeForce MX570 A, with a 0% delta, and trails the AMD Radeon Pro 575X by 1%.

FAQ

Q: Which GPU has better raw compute performance?

A: The AMD Radeon RX 6550M. It wins the OpenCL benchmark with 42,536 versus 36,426, a 16.8% advantage, and wins Vulkan with 50,867 versus 40,115, a 26.8% advantage.

Q: Does the Radeon Pro 580X have any advantages in memory?

A: Yes. The Pro 580X has 8 GB of GDDR5 on a 256-bit bus with 218.9 GB/s bandwidth, while the RX 6550M has 4 GB of GDDR6 on a 64-bit bus with 144.0 GB/s bandwidth.

Q: Which GPU supports ray tracing?

A: Only the AMD Radeon RX 6550M. It has 16 ray tracing cores, while the Radeon Pro 580X has none.

Q: What is the difference in API support?

A: The RX 6550M supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Pro 580X supports DirectX 12 (12_0) and Vulkan 1.3. Both support OpenGL 4.6.

Q: Which GPU is more power efficient?

A: The RX 6550M has a TDP of 80 W, while the Pro 580X has a TDP of 185 W. The RX 6550M delivers higher benchmark scores at less than half the power draw.

Q: Does the Radeon Pro 580X have any unique benchmark results?

A: Yes. The Pro 580X has a recorded Geekbench Metal score of 39,577, a test not present in the RX 6550M's data.

Where Each One Wins

The RX 6550M wins in every shared benchmark category. Its 16.8% OpenCL lead and 26.8% Vulkan lead make it the superior choice for compute-heavy applications that rely on these APIs. The 6 nm process node and RDNA 2.0 architecture deliver higher clock speeds, with a 2840 MHz boost versus 1200 MHz on the Pro 580X, and the ray tracing cores provide a feature the Pro 580X simply cannot offer. The RX 6550M also achieves this with an 80 W TDP, making it suitable for thin-and-light systems where thermal headroom is limited. Its production status is Active, meaning it is still a current product.

The Pro 580X wins in memory capacity and bandwidth. Its 8 GB frame buffer is double the RX 6550M's 4 GB, and its 218.9 GB/s bandwidth is 51.3% higher. This gives it an edge for workloads that cannot fit within 4 GB, such as large texture sets or multi-layer compositing. It also has more shading units, 2,304 versus 1,024, which can help in certain driver-optimized scenarios. The Pro 580X has a Metal benchmark score of 39,577, indicating it is tested in macOS environments, and its 2x HDMI 2.0b display outputs make it a fixed part of certain Mac systems. However, its End-of-life production status means it is no longer actively manufactured.

Specification Differences

The two GPUs differ on nearly every major specification. The RX 6550M uses the Navi 24 chip on a 6 nm process at TSMC, while the Pro 580X uses Ellesmere on a 14 nm process at GlobalFoundries. Transistor counts are similar, 5,400 million versus 5,700 million, but die size differs substantially: 107 mm² versus 232 mm². Clock speeds favor the RX 6550M, with a 2000 MHz base and 2840 MHz boost versus 1100 MHz and 1200 MHz. The RX 6550M also has a game clock of 2560 MHz, a field the Pro 580X does not list. Memory speeds are 18 Gbps effective versus 6.8 Gbps effective.

Memory capacity and bus width favor the Pro 580X: 8 GB on a 256-bit bus versus 4 GB on a 64-bit bus. Bandwidth follows, 218.9 GB/s versus 144.0 GB/s. Shading units and TMUs also favor the Pro 580X, 2,304 and 144 versus 1,024 and 64, while ROPs are equal at 32. The RX 6550M has 16 ray tracing cores; the Pro 580X has none. Pixel rate favors the RX 6550M at 90.88 GPixel/s versus 38.40 GPixel/s, while texture rate is close: 181.8 GTexel/s versus 172.8 GTexel/s. FP32 performance slightly favors the RX 6550M at 5.816 TFLOPS versus 5.530 TFLOPS. FP16 performance is a major split: the RX 6550M delivers 11.63 TFLOPS with a 2:1 ratio, while the Pro 580X delivers 5.530 TFLOPS at 1:1.

Power consumption is a decisive difference. The RX 6550M has an 80 W TDP, the Pro 580X a 185 W TDP. Both are listed as IGP slot width, but the RX 6550M has no power connectors while the Pro 580X does not list any. The bus interface differs: PCIe 4.0 x4 for the RX 6550M versus Apple MPX for the Pro 580X. Display outputs are portable device dependent on the RX 6550M, while the Pro 580X has 2x HDMI 2.0b. Release dates are separated by nearly four years, with the RX 6550M launching in January 2023 and the Pro 580X in March 2019. The RX 6550M is Active, the Pro 580X is End-of-life. The RX 6550M's predecessor is Polaris Mobile; the Pro 580X has no listed predecessor or successor.