AMD Instinct MI455X vs AMD Radeon 880M Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the AMD Instinct MI455X and the AMD Radeon 880M. The MI455X has no recorded benchmark entries, while the 880M has ten discrete test scores. This absence of comparative data is itself informative: the MI455X is an accelerator with no display outputs and no API support, whereas the 880M is an integrated graphics processor with active production status.

For the 880M, the recorded measurements show a PassMark G3D score of 7615 and a PassMark GPU Compute score of 3719. Its Geekbench OpenCL result reaches 31285, while the Vulkan score hits 40006. The 3DMark Steel Nomad DX12 test returns 535. These numbers place the 880M at the 43rd percentile among all GPUs in the database, with an average benchmark score of 8436.

The nearest rivals for the 880M provide context. The NVIDIA GeForce GTX 675MX averages 8427, a 0.1% delta. The NVIDIA GeForce MX330 averages 8458, a -0.3% delta. The AMD Radeon HD 8870M averages 8462, also -0.3%. The AMD Radeon R9 M375X averages 8325, a 1.3% delta. The 880M sits within 1.3% of all four rivals, indicating a tightly clustered performance band.

Without MI455X benchmark scores, no direct win-loss tally exists. The recorded winsA and winsB fields both show zero. The data confirms that the MI455X is a compute-focused part with a 50th percentile rank, but no measured performance data. The 880M, by contrast, has measurable results across multiple APIs and workloads, including DirectX 9 through 12 and OpenCL.

FAQ

Q: Why does the AMD Instinct MI455X have no benchmark scores in the database?

A: The MI455X entry lists an empty benchmarks array. It also has no display outputs and no API support for DirectX, OpenGL, or Vulkan, which explains why no graphics-oriented tests apply. Its average benchmark score is recorded as 0.

Q: What is the 880M's best-performing benchmark result?

A: The highest recorded score for the 880M is the Geekbench Vulkan result at 40006. The OpenCL score follows at 31285, with PassMark G3D at 7615 and PassMark GPU Compute at 3719.

Q: How does the 880M compare to its closest rivals?

A: The 880M averages 8436. The nearest rival, the NVIDIA GeForce GTX 675MX, averages 8427, putting the 880M 0.1% ahead. The AMD Radeon R9 M375X trails by 1.3%, while the NVIDIA GeForce MX330 and AMD Radeon HD 8870M both lead by 0.3%.

Q: Does the MI455X support any graphics APIs?

A: No. The database records DirectX, OpenGL, and Vulkan as "N/A" for the MI455X. The 880M, in contrast, supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What memory configuration does each part use?

A: The MI455X uses 432 GB of HBM4 memory on a 24576-bit bus with 23.3 TB/s bandwidth. The 880M uses system shared memory with system-dependent bandwidth and a system shared bus width.

Q: What are the power requirements for each device?

A: The MI455X has a TDP of 2300 W with a suggested PSU of 2700 W. The 880M has a TDP of 15 W and no suggested PSU listed, reflecting its integrated nature.

Architecture Differences

The two AMD parts diverge at every architectural level. The MI455X uses the CDNA 5.0 architecture on a 2 nm process from TSMC. The 880M uses RDNA 3.5 on a 4 nm process, also from TSMC. The MI455X belongs to the Instinct (MIx) generation, while the 880M falls under the Navi III IGP (Strix Point Mobile) generation.

Transistor counts reveal the scale gap. The MI455X packs 320,000 million transistors on a 2990 mm² die, yielding a transistor density of 107.0M per mm². The 880M contains 34,000 million transistors on a 233 mm² die, with a higher density of 145.9M per mm². The density difference suggests the 880M's logic is more tightly packed, while the MI455X prioritizes raw scale.

Compute resources differ by orders of magnitude. The MI455X has 32768 shading units and 1024 texture mapping units, with 0 ROPs. The 880M has 768 shading units, 48 TMUs, and 16 ROPs. The MI455X also includes 12 ray tracing cores, a feature the MI455X lacks entirely. The MI455X's pixel rate is 0 MPixel/s, while the 880M reaches 46.40 GPixel/s. Texture rates are 2,457.6 GTexel/s for the MI455X versus 139.2 GTexel/s for the 880M.

Clock behavior differs substantially. The MI455X runs at a 1000 MHz base and 2400 MHz boost. The 880M starts at 400 MHz base and boosts to 2900 MHz. The 880M's higher boost clock partially compensates for its smaller compute array, but the FP32 throughput gap remains enormous: 157.3 TFLOPS for the MI455X versus 4.454 TFLOPS for the 880M. Both parts show 1:1 FP16 to FP32 ratios, meaning half-precision throughput matches single-precision.

Memory architecture could not be more different. The MI455X uses dedicated HBM4 with 432 GB capacity and 23.3 TB/s bandwidth. The 880M relies on system shared memory with system-dependent performance. The MI455X's 24576-bit bus width dwarfs any integrated solution, reflecting its purpose as a data-center accelerator.

The MI455X uses a PCIe 6.0 x16 interface, while the 880M uses PCIe 4.0 x8. The MI455X has no display outputs and no power connectors, instead using an EAM Module slot width. The 880M is an IGP with portable-device-dependent outputs.

The Verdict

The data paints a clear picture of two devices built for entirely different workloads. The MI455X is a 2300 W accelerator with no display outputs, no graphics API support, and no recorded benchmarks. The 880M is a 15 W integrated processor with active production, full API support, and measurable performance across ten tests.

For compute-heavy tasks, the MI455X's specifications indicate massive capability. Its 157.3 TFLOPS FP32 throughput, 432 GB HBM4 memory, and 23.3 TB/s bandwidth are orders of magnitude beyond the 880M's 4.454 TFLOPS and shared memory. The 880M cannot approach this level of raw compute.

For graphics and general-purpose use, the 880M is the only viable option. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. It has display outputs and ROPs. The MI455X offers none of these features, making it unsuitable for any rendering or display workload.

The production status differs: the 880M is listed as Active, while the MI455X has no status recorded. The release dates also differ, with the 880M launching on 2024-07-14 and the MI455X on 2026-07-22.

Specification Differences

| Field | AMD Instinct MI455X | AMD Radeon 880M |

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

| Architecture | CDNA 5.0 | RDNA 3.5 |

| Generation | Instinct (MIx) | Navi III IGP (Strix Point Mobile) |

| Process Node | 2 nm | 4 nm |

| Transistors | 320,000 million | 34,000 million |

| Die Size | 2990 mm² | 233 mm² |

| Transistor Density | 107.0M / mm² | 145.9M / mm² |

| Base Clock | 1000 MHz | 400 MHz |

| Boost Clock | 2400 MHz | 2900 MHz |

| Memory Size | 432 GB | System Shared |

| Memory Type | HBM4 | System Shared |

| Bus Width | 24576 bit | System Shared |

| Bandwidth | 23.3 TB/s | System Dependent |

| Shading Units | 32768 | 768 |

| TMUs | 1024 | 48 |

| ROPs | 0 | 16 |

| Ray Tracing Cores | None | 12 |

| Pixel Rate | 0 MPixel/s | 46.40 GPixel/s |

| Texture Rate | 2,457.6 GTexel/s | 139.2 GTexel/s |

| FP32 | 157.3 TFLOPS | 4.454 TFLOPS |

| FP16 | 157.3 TFLOPS (1:1) | 4.454 TFLOPS (1:1) |

| TDP | 2300 W | 15 W |

| Slot Width | EAM Module | IGP |

| Bus Interface | PCIe 6.0 x16 | PCIe 4.0 x8 |

| Display Outputs | No outputs | Portable Device Dependent |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Production Status | Not listed | Active |

| Release Date | 2026-07-22 | 2024-07-14 |

Where Each One Wins

The MI455X wins decisively in raw compute throughput. Its FP32 output of 157.3 TFLOPS is roughly 35 times the 880M's 4.454 TFLOPS. Texture rate follows the same pattern: 2,457.6 GTexel/s versus 139.2 GTexel/s. The MI455X also has 32768 shading units compared to 768, and its memory bandwidth of 23.3 TB/s eliminates any bottleneck from the 880M's system-dependent shared memory.

The MI455X wins on memory capacity and bandwidth by design. The 432 GB HBM4 pool with a 24576-bit bus targets large model training and inference workloads. The 880M's shared memory cannot match this, but it also does not need to, as integrated graphics operate within system memory constraints.

The 880M wins on efficiency and integration. Its 15 W TDP is a fraction of the 2300 W TDP of the MI455X. The 880M's 2900 MHz boost clock exceeds the MI455X's 2400 MHz, and its transistor density of 145.9M per mm² is higher than the MI455X's 107.0M per mm². The 880M also has 12 ray tracing cores, which the MI455X lacks.

The 880M wins on software compatibility. Its DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support enable gaming and general graphics. The MI455X has no API support recorded, limiting it to compute-oriented stacks.

The 880M wins on portability. Its IGP form factor and PCIe 4.0 x8 interface fit mobile and small-form-factor designs. The MI455X's EAM Module slot and PCIe 6.0 x16 interface require a server-class platform.

The 880M also wins on benchmark presence. Its ten recorded scores provide measurable data, while the MI455X has none. The 880M's 43rd percentile ranking and average score of 8436 place it among comparable mobile and older discrete GPUs, specifically within 1.3% of the NVIDIA GeForce GTX 675MX, MX330, AMD Radeon HD 8870M, and R9 M375X.