AMD Instinct MI455X vs AMD Radeon RX 9050 OEM Comparison

Head-to-Head Benchmarks

The database contains no recorded head-to-head benchmark results for the AMD Instinct MI455X versus the AMD Radeon RX 9050 OEM. Both products hold a percentile rank of 50 against all GPUs, and both carry an average benchmark score of 0. The winsA and winsB fields are both 0, indicating that no comparative measurements have been logged. Without benchmark data, the raw specification sheet must serve as the primary basis for differentiation.

The most immediate divergence appears in compute throughput. The Instinct MI455X delivers 157.3 TFLOPS of FP32 performance, while the RX 9050 OEM delivers 10.65 TFLOPS. That is a ratio of roughly 14.8 to 1 in favor of the Instinct part. FP16 performance follows the same 1:1 pattern on both cards, with the MI455X again at 157.3 TFLOPS and the RX 9050 OEM at 10.65 TFLOPS. Texture rate shows a similar gulf: 2,457.6 GTexel/s versus 166.4 GTexel/s. Pixel rate, however, is a different story. The MI455X records 0 MPixel/s because it has no ROPs, while the RX 9050 OEM manages 166.4 GPixel/s from its 64 ROPs. The Instinct card is not designed to output pixels to a display, and that structural difference shows up plainly in the rasterization metrics.

Memory bandwidth also separates the two decisively. The MI455X uses HBM4 with a 24576-bit bus and reaches 23.3 TB/s. The RX 9050 OEM uses GDDR6 with a 64-bit bus and reaches 144.0 GB/s. That is a bandwidth advantage of more than 160 times for the Instinct accelerator. Memory capacity differs by a factor of 108: 432 GB versus 4 GB. The clock speeds tell a more nuanced story. The RX 9050 OEM has a higher base clock at 1330 MHz versus 1000 MHz, and a higher boost clock at 2600 MHz versus 2400 MHz. The game clock of 1920 MHz on the RX 9050 OEM has no equivalent on the MI455X, which lacks a game clock field entirely. Memory clock also favors the Radeon part: 2250 MHz at 18 Gbps effective versus 1900 MHz at 7.6 Gbps effective.

Where Each One Wins

The Instinct MI455X wins decisively in any workload that depends on raw compute density, memory capacity, or memory bandwidth. Its 32768 shading units dwarf the 1024 shading units on the RX 9050 OEM. Its 1024 TMUs compare to 64 on the Radeon. The 432 GB HBM4 pool enables working sets that would be impossible on a 4 GB GDDR6 buffer. The 23.3 TB/s bandwidth feeds that large memory array at a rate that supports massive parallel data movement. For training large models, processing high-resolution scientific simulations, or handling multi-terabyte datasets, the MI455X is the only one of the two that can even begin to address those tasks.

The Radeon RX 9050 OEM wins in every category related to graphics output and consumer-facing rendering. It has 64 ROPs and a pixel rate of 166.4 GPixel/s, while the MI455X has zero ROPs and zero pixel throughput. The RX 9050 OEM includes 16 ray tracing cores, a feature entirely absent from the MI455X specification. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, whereas the MI455X lists N/A for all three APIs. The RX 9050 OEM provides display outputs: 1x HDMI 2.1b and 2x DisplayPort 2.1a. The MI455X provides no outputs. The Radeon also wins on power efficiency from a system integration standpoint: its 92 W TDP and 250 W suggested PSU compare to 2300 W TDP and a 2700 W suggested PSU on the Instinct. For a desktop workstation or gaming OEM build, the RX 9050 OEM is the functional choice. For a compute node, the MI455X is the only viable option.

Architecture Differences

The two chips come from entirely different architectural lineages. The MI455X uses CDNA 5.0 architecture, built on a 2 nm TSMC process. The RX 9050 OEM uses RDNA 4.0 architecture, built on a 4 nm TSMC process. The transistor counts reflect the scale difference: the MI455X packs 320,000 million transistors on a die size of 2990 mm², giving a transistor density of 107.0M per mm². The RX 9050 OEM contains 29,700 million transistors on a 199 mm² die, with a density of 149.2M per mm². The Radeon achieves a higher density per square millimeter, but the Instinct die is roughly 15 times larger in area and holds about 10.8 times more transistors.

The memory subsystems are fundamentally different. The MI455X uses HBM4 with a 24576-bit bus, which explains its enormous 23.3 TB/s bandwidth. The RX 9050 OEM uses GDDR6 with a 64-bit bus and 144.0 GB/s bandwidth. The bus width difference is a factor of 384. The memory clock on the Radeon is higher at 2250 MHz versus 1900 MHz, but the effective data rate of 18 Gbps versus 7.6 Gbps still cannot compensate for the vastly narrower bus.

Compute resources differ by an order of magnitude or more. The MI455X has 32768 shading units and 1024 TMUs. The RX 9050 OEM has 1024 shading units and 64 TMUs. The Instinct card has no ROPs, no ray tracing cores, and no tensor core field. The Radeon has 64 ROPs and 16 ray tracing cores. The MI455X belongs to the Instinct (MIx) generation with a predecessor of Radeon Instinct. The RX 9050 OEM belongs to the Radeon RX 9000 series, generation Navi IV (RX 9000), with a predecessor of Navi III. The MI455X uses a PCIe 6.0 x16 interface, while the RX 9050 OEM uses PCIe 5.0 x16. The physical form factors differ: the MI455X is an EAM Module with no power connectors, and the RX 9050 OEM is a Dual-slot card with one 8-pin connector. API support tells the same story: the MI455X has no graphics API entries, while the RX 9050 OEM supports the full modern consumer stack. Release dates sit five days apart, with the MI455X on 2026-07-22 and the RX 9050 OEM on 2026-07-27.

FAQ

Q: Which card has more FP32 compute capability?

A: The AMD Instinct MI455X delivers 157.3 TFLOPS of FP32 performance, while the AMD Radeon RX 9050 OEM delivers 10.65 TFLOPS. The Instinct part has roughly 14.8 times the FP32 throughput.

Q: Does the Instinct MI455X support ray tracing?

A: No. The MI455X specification lists no ray tracing cores. The Radeon RX 9050 OEM includes 16 ray tracing cores.

Q: Can the Instinct MI455X output video to a display?

A: No. The MI455X has no display outputs and records 0 MPixel/s pixel rate because it has zero ROPs. The Radeon RX 9050 OEM provides 1x HDMI 2.1b and 2x DisplayPort 2.1a outputs with a 166.4 GPixel/s pixel rate.

Q: What memory types do the two cards use?

A: The MI455X uses HBM4 with 432 GB capacity, a 24576-bit bus, and 23.3 TB/s bandwidth. The RX 9050 OEM uses GDDR6 with 4 GB capacity, a 64-bit bus, and 144.0 GB/s bandwidth.

Q: Which card has a higher boost clock?

A: The Radeon RX 9050 OEM has a higher boost clock at 2600 MHz compared to the MI455X at 2400 MHz. The Radeon also has a higher base clock at 1330 MHz versus 1000 MHz.

Q: What is the TDP difference?

A: The MI455X has a TDP of 2300 W and a suggested PSU of 2700 W. The RX 9050 OEM has a TDP of 92 W and a suggested PSU of 250 W.

Specification Differences

| Field | AMD Instinct MI455X | AMD Radeon RX 9050 OEM |

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

| Architecture | CDNA 5.0 | RDNA 4.0 |

| Process node | 2 nm | 4 nm |

| Transistors | 320,000 million | 29,700 million |

| Die size | 2990 mm² | 199 mm² |

| Transistor density | 107.0M / mm² | 149.2M / mm² |

| Base clock | 1000 MHz | 1330 MHz |

| Boost clock | 2400 MHz | 2600 MHz |

| Game clock | None | 1920 MHz |

| Memory clock | 1900 MHz 7.6 Gbps effective | 2250 MHz 18 Gbps effective |

| Memory size | 432 GB | 4 GB |

| Memory type | HBM4 | GDDR6 |

| Memory bus width | 24576 bit | 64 bit |

| Memory bandwidth | 23.3 TB/s | 144.0 GB/s |

| Shading units | 32768 | 1024 |

| TMUs | 1024 | 64 |

| ROPs | 0 | 64 |

| Ray tracing cores | None | 16 |

| Pixel rate | 0 MPixel/s | 166.4 GPixel/s |

| Texture rate | 2,457.6 GTexel/s | 166.4 GTexel/s |

| FP32 | 157.3 TFLOPS | 10.65 TFLOPS |

| FP16 | 157.3 TFLOPS (1:1) | 10.65 TFLOPS (1:1) |

| TDP | 2300 W | 92 W |

| Slot width | EAM Module | Dual-slot |

| Power connectors | None | 1x 8-pin |

| Suggested PSU | 2700 W | 250 W |

| Bus interface | PCIe 6.0 x16 | PCIe 5.0 x16 |

| Display outputs | No outputs | 1x HDMI 2.1b, 2x DisplayPort 2.1a |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Production status | Not specified | Active |

| Release date | 2026-07-22 | 2026-07-27 |

The Verdict

The recorded data separates these two products into entirely different categories despite sharing the AMD brand. The Instinct MI455X is a compute accelerator with no graphics output, no consumer API support, and no ROPs. Its 157.3 TFLOPS FP32 throughput, 432 GB HBM4 memory, and 23.3 TB/s bandwidth position it for data-center scale workloads. The 2300 W TDP and 2700 W suggested PSU confirm that it belongs in a server chassis with dedicated power infrastructure, not a desktop. The Radeon RX 9050 OEM is a consumer graphics card with 64 ROPs, 16 ray tracing cores, DirectX 12 Ultimate support, and three display outputs. Its 92 W TDP and 250 W suggested PSU make it suitable for standard OEM desktop configurations.

The specification sheet suggests that buyers should choose based on workload type. The MI455X suits applications that need massive parallel compute and enormous memory capacity. The RX 9050 OEM suits systems that need rasterization, ray tracing, and display output. The MI455X has no pixel rate, no graphics APIs, and no display connectors, so it cannot function as a typical video card. The RX 9050 OEM has 4 GB of GDDR6 and 10.65 TFLOPS, which places it far below the Instinct part in raw compute but makes it the only one of the two that can render and output frames. The database shows no benchmark results, so performance claims beyond the specification sheet remain unverified. The percentile rank of 50 for both products indicates that neither has accumulated comparative measurements. The data confirms that this is not a head-to-head comparison of two similar parts; it is a comparison of two different product classes that happen to share a manufacturer.