AMD Instinct MI300 vs AMD Radeon RX 6550M Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results for the AMD Instinct MI300 and AMD Radeon RX 6550M. The Instinct MI300 has an empty benchmark array, yielding an average benchmark score of 0 and a percentile rank of 50 among all GPUs. The RX 6550M, by contrast, has two recorded benchmark scores: 42,536 in Geekbench OpenCL and 50,867 in Geekbench Vulkan, producing an average of 46,702 and a percentile rank of 85.

This absence of comparative data means the two products cannot be ranked against each other through direct measurements. The MI300's zero scores reflect a lack of consumer-oriented benchmark entries, not necessarily a lack of compute capability. Its percentile of 50 places it at the median of all GPUs in the database, but that ranking is derived from no actual test data, rendering it a placeholder rather than a meaningful performance indicator.

The RX 6550M's nearest rivals in the database provide context for its standing. It sits 0.2% above the Intel Arc A530M (average score 46,614) and the AMD Radeon RX 5600M (average score 46,601). It leads the NVIDIA RTX A2000 (46,043) by 1.4% and the NVIDIA RTX 5880 Ada Generation (45,972) by 1.6%. These margins are narrow, indicating the RX 6550M operates in a tight competitive band where small score differences separate adjacent products.

Since the MI300 has no comparable benchmark entries, any attempt to quantify a win for either side in a head-to-head comparison is unsupported by the recorded data. The database shows one product with measurable results and another with none. Users seeking a direct performance comparison between these two accelerators will not find it in these measurements.

Architecture Differences

The two AMD products diverge fundamentally in architecture, process technology, and design intent. The Instinct MI300 uses the CDNA 3.0 architecture, built on a 5 nm process at TSMC, with the chip codenamed Aqua Vanjaram. It contains 153,000 million transistors on a die size of 1,017 mm², yielding a transistor density of 150.4 million per mm². The Radeon RX 6550M uses the RDNA 2.0 architecture, fabricated on a 6 nm process, also at TSMC, with the Navi 24 chip. It packs 5,400 million transistors into a 107 mm² die, for a density of 50.5 million per mm².

The transistor count difference is stark: the MI300 has roughly 28 times more transistors than the RX 6550M, spread across nearly ten times the die area. This reflects their divergent roles. The MI300 is a data center accelerator with no display outputs, while the RX 6550M is a mobile graphics processor with portable device dependent outputs.

Memory configurations are equally divergent. The MI300 carries 128 GB of HBM3 across an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RX 6550M has 4 GB of GDDR6 on a 64-bit bus, providing 144.0 GB/s. The memory clock differs as well: the MI300 runs at 1300 MHz with 5.2 Gbps effective, while the RX 6550M runs at 2250 MHz with 18 Gbps effective. The MI300's bandwidth advantage is enormous, roughly 37 times higher, but the RX 6550M's per-pin efficiency is higher due to its faster effective data rate.

Compute resources show the MI300's scale. It has 14,080 shading units, 880 texture mapping units, and zero raster operation units, with a texture rate of 1,496.0 GTexel/s and pixel rate of 0 MPixel/s. The RX 6550M has 1,024 shading units, 64 TMUs, and 32 ROPs, with a texture rate of 181.8 GTexel/s and pixel rate of 90.88 GPixel/s. The MI300's FP32 throughput is 47.87 TFLOPS, while the RX 6550M delivers 5.816 TFLOPS. For FP16, the MI300 achieves 47.87 TFLOPS at a 1:1 ratio, whereas the RX 6550M reaches 11.63 TFLOPS at a 2:1 ratio, indicating the MI300 dedicates equal resources to FP16 while the RX 6550M doubles its throughput through packed math.

The RX 6550M includes 16 ray tracing cores, a feature absent from the MI300's specification. The MI300 lists no API support for DirectX, OpenGL, or Vulkan, while the RX 6550M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300 uses a PCIe 5.0 x16 interface and requires 2x 8-pin power connectors with a suggested power supply of 1000 W, consuming 600 W. The RX 6550M uses PCIe 4.0 x4, has no power connectors, and consumes 80 W.

Clock speeds also differ. The MI300 runs at a 1000 MHz base and 1700 MHz boost. The RX 6550M runs at a 2000 MHz base, 2840 MHz boost, and 2560 MHz game clock. The RX 6550M's higher clocks reflect its smaller, more power-efficient design, while the MI300 relies on massive parallelism and memory bandwidth rather than raw frequency.

Both products share the same release date of January 3, 2023. The MI300 belongs to the Instinct (MIx) generation with the predecessor Radeon Instinct, while the RX 6550M belongs to the Navi Mobile (RX 6000M) generation with the predecessor Polaris Mobile. The RX 6550M's production status is listed as active; the MI300's is not specified. Neither has a successor listed.

FAQ

Q: Why does the AMD Instinct MI300 have a benchmark score of zero?

A: The database contains no benchmark entries for the MI300. Its benchmark array is empty, resulting in an average score of 0 and a percentile rank of 50 among all GPUs. This does not indicate a lack of compute capability, but rather that no consumer-oriented benchmark tests have been recorded for this accelerator.

Q: How does the Radeon RX 6550M compare to its nearest rivals?

A: The RX 6550M's average benchmark score is 46,702. It leads the Intel Arc A530M (46,614) by 0.2%, the AMD Radeon RX 5600M (46,601) by 0.2%, the NVIDIA RTX A2000 (46,043) by 1.4%, and the NVIDIA RTX 5880 Ada Generation (45,972) by 1.6%. These are narrow margins, showing the RX 6550M sits at the top of a closely grouped set of mobile and workstation GPUs.

Q: What memory configurations do the two products use?

A: The MI300 uses 128 GB of HBM3 with an 8192-bit bus and 5.32 TB/s bandwidth. The RX 6550M uses 4 GB of GDDR6 with a 64-bit bus and 144.0 GB/s bandwidth. The MI300's memory bandwidth is roughly 37 times higher, though the RX 6550M's memory runs at a higher effective clock of 18 Gbps versus 5.2 Gbps.

Q: Does the MI300 support graphics APIs?

A: No. The MI300 lists DirectX, OpenGL, and Vulkan as N/A. The RX 6550M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This reflects the MI300's role as a compute-focused accelerator with no display outputs, whereas the RX 6550M is a full-featured mobile graphics processor.

Q: What is the power consumption difference?

A: The MI300 has a TDP of 600 W and requires 2x 8-pin power connectors with a suggested power supply of 1000 W. The RX 6550M has a TDP of 80 W and uses no power connectors, drawing power through its mobile platform. The MI300's power draw is 7.5 times higher, consistent with its larger die and memory system.

Q: Which product has ray tracing support?

A: The RX 6550M includes 16 ray tracing cores. The MI300's specification does not list any ray tracing cores. This indicates the RX 6550M is designed for graphics workloads including ray-traced effects, while the MI300 is oriented toward compute tasks without such features.

The Verdict

The recorded data shows two products with fundamentally different purposes. The AMD Instinct MI300 is a data center accelerator with 128 GB of HBM3 memory, 5.32 TB/s bandwidth, 47.87 TFLOPS FP32, and 600 W power consumption, but it has no display outputs, no graphics API support, and no benchmark scores in the database. The AMD Radeon RX 6550M is a mobile GPU with 4 GB GDDR6, 144.0 GB/s bandwidth, 5.816 TFLOPS FP32, 16 ray tracing cores, full graphics API support, and measurable benchmark results placing it in the 85th percentile among all GPUs.

For compute-heavy data center workloads, the MI300's specification indicates massive parallel throughput and memory bandwidth, though the absence of benchmark data means its real-world performance cannot be verified from these measurements. For mobile graphics tasks, the RX 6550M demonstrates solid performance relative to its nearest rivals, sitting 0.2% above the Intel Arc A530M and AMD Radeon RX 5600M, and 1.4% above the NVIDIA RTX A2000.

The choice between these products is dictated by their architecture and form factor. The MI300 requires a 1000 W power supply and measures 267 mm in length, making it a server or workstation component. The RX 6550M has no power connectors, an IGP slot width, and portable device dependent outputs, indicating integration into laptops or compact systems. Users with compute workloads requiring massive memory capacity would select the MI300 based on its specifications. Users needing a mobile GPU with graphics and ray tracing support would select the RX 6550M based on its benchmark results and feature set.

Specification Differences

| Specification | AMD Instinct MI300 | AMD Radeon RX 6550M |

|----------------|-------------------|---------------------|

| Architecture | CDNA 3.0 | RDNA 2.0 |

| Process Node | 5 nm | 6 nm |

| Transistors | 153,000 million | 5,400 million |

| Die Size | 1017 mm² | 107 mm² |

| Transistor Density | 150.4M / mm² | 50.5M / mm² |

| Base Clock | 1000 MHz | 2000 MHz |

| Boost Clock | 1700 MHz | 2840 MHz |

| Game Clock | N/A | 2560 MHz |

| Memory Clock | 1300 MHz, 5.2 Gbps effective | 2250 MHz, 18 Gbps effective |

| Memory Size | 128 GB | 4 GB |

| Memory Type | HBM3 | GDDR6 |

| Memory Bus | 8192 bit | 64 bit |

| Memory Bandwidth | 5.32 TB/s | 144.0 GB/s |

| Shading Units | 14,080 | 1,024 |

| TMUs | 880 | 64 |

| ROPs | 0 | 32 |

| Ray Tracing Cores | N/A | 16 |

| Pixel Rate | 0 MPixel/s | 90.88 GPixel/s |

| Texture Rate | 1,496.0 GTexel/s | 181.8 GTexel/s |

| FP32 | 47.87 TFLOPS | 5.816 TFLOPS |

| FP16 | 47.87 TFLOPS (1:1) | 11.63 TFLOPS (2:1) |

| TDP | 600 W | 80 W |

| Power Connectors | 2x 8-pin | None |

| Suggested PSU | 1000 W | N/A |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 x4 |

| Display Outputs | No outputs | Portable Device Dependent |

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Slot Width | N/A | IGP |

| Length | 267 mm, 10.5 inches | N/A |

| Height | 111 mm, 4.4 inches | N/A |

| Generation | Instinct (MIx) | Navi Mobile (RX 6000M) |

| Predecessor | Radeon Instinct | Polaris Mobile |

| Production Status | N/A | Active |

Where Each One Wins

The AMD Instinct MI300 wins decisively in raw compute scale. Its 47.87 TFLOPS FP32 throughput is 8.2 times higher than the RX 6550M's 5.816 TFLOPS. Its 5.32 TB/s memory bandwidth is 37 times higher. Its 128 GB memory capacity is 32 times larger. Its 153,000 million transistors provide a massive parallelism advantage over the RX 6550M's 5,400 million. For workloads requiring large model fits, high bandwidth data movement, or sustained FP32 compute, the MI300's specification dominates.

The AMD Radeon RX 6550M wins in practical graphics capability. It has 32 ROPs versus the MI300's 0, enabling actual pixel output at 90.88 GPixel/s. It includes 16 ray tracing cores, which the MI300 lacks entirely. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, whereas the MI300 lists no graphics APIs. Its 2840 MHz boost clock is 67% higher than the MI300's 1700 MHz, and its 2560 MHz game clock indicates sustained frequency under graphics loads. Its 80 W power draw makes it suitable for mobile platforms, while the MI300's 600 W TDP requires a 1000 W power supply.

The RX 6550M also wins in benchmark presence. Its average score of 46,702 places it in the 85th percentile of all GPUs, with measurable results in both OpenCL and Vulkan. The MI300 has no benchmark scores, leaving its real-world performance unquantified. In terms of efficiency, the RX 6550M delivers 5.816 TFLOPS at 80 W, while the MI300 delivers 47.87 TFLOPS at 600 W. The RX 6550M achieves 72.7 GFLOPS per watt versus the MI300's 79.8 GFLOPS per watt, a modest efficiency edge for the MI300 despite its far larger power envelope.

The MI300's 1,496.0 GTexel/s texture rate is 8.2 times higher than the RX 6550M's 181.8 GTexel/s, but the RX 6550M's pixel rate of 90.88 GPixel/s versus 0 MPixel/s means only the RX 6550M can drive displays. The MI300's PCIe 5.0 x16 interface provides higher host bandwidth than the RX 6550M's PCIe 4.0 x4, benefiting data transfer in server contexts. The RX 6550M's IGP slot width and lack of power connectors suit compact mobile designs, while the MI300's 267 mm length and 2x 8-pin connectors indicate a full-size accelerator card.