AMD Instinct MI355X vs AMD Radeon 880M Comparison

Head-to-Head Benchmarks

The recorded data contains benchmark results for the AMD Radeon 880M only, while the AMD Instinct MI355X has no benchmark scores in the database. This asymmetry means a direct numerical comparison across identical workloads is not possible from the measurements. The MI355X carries an average benchmark score of zero and a percentile ranking of 50 against all GPUs, while the 880M achieves an average score of 8436 and sits at the 43rd percentile.

For the 880M, the strongest recorded result comes from Geekbench Vulkan with a score of 40006, followed by Geekbench OpenCL at 31285. The PassMark G3D score of 7615 and PassMark GPU Compute score of 3719 indicate the integrated part's general rendering and compute capabilities. In DirectX workloads, the 880M shows lower figures: PassMark DirectX 11 scores 73, DirectX 9 scores 97, DirectX 12 scores 32, and DirectX 10 scores 31. The PassMark G2D score of 969 reflects 2D performance.

The nearest rivals for the 880M provide context for its standing. The NVIDIA GeForce GTX 675MX averages 8427, a delta of 0.1 percent above the 880M. The NVIDIA GeForce MX330 averages 8458, placing it 0.3 percent higher. The AMD Radeon HD 8870M averages 8462, also 0.3 percent higher. The AMD Radeon R9 M375X averages 8325, which is 1.3 percent below the 880M. These deltas are narrow, indicating the 880M clusters tightly with older discrete mobile GPUs in overall benchmark averages.

The MI355X, lacking any recorded benchmark entries, cannot be positioned against those rivals through measured scores. Its percentile of 50 is a neutral placement, while the 880M's 43rd percentile places it slightly below the midpoint of all GPUs in the database.

Architecture Differences

The two processors diverge fundamentally in design purpose and implementation. The MI355X uses the MI350 256CU chip built on CDNA 4.0 architecture, fabricated on a 3 nm process at TSMC. The 880M uses the Strix Point chip with RDNA 3.5 architecture, fabricated on a 4 nm process at TSMC. The MI355X belongs to the Instinct (MIx) generation for accelerator workloads, while the 880M belongs to the Navi III IGP (Strix Point Mobile) generation for integrated graphics.

Transistor counts differ substantially. The MI355X contains 185,000 million transistors on a die size of 2380 mm², yielding a density of 77.7 million transistors per square millimeter. The 880M contains 34,000 million transistors on a die size of 233 mm², yielding a density of 145.9 million transistors per square millimeter. The MI355X has roughly 5.4 times the transistors and 10.2 times the die area, but the 880M achieves nearly double the transistor density.

Memory architecture separates them completely. The MI355X features 288 GB of HBM3e memory on an 8192 bit bus, delivering 8.19 TB/s bandwidth. The 880M uses system shared memory with no dedicated allocation, and bandwidth is system dependent. The MI355X's memory clock runs at 2000 MHz with 8 Gbps effective speed, while the 880M has no dedicated memory clock.

Compute resources show a wide gap. The MI355X has 16384 shading units and 1024 texture mapping units, with no ROPs listed. The 880M has 768 shading units, 48 texture mapping units, and 16 ROPs, plus 12 ray tracing cores. The MI355X lists no ray tracing cores. Pixel rate for the MI355X is 0 MPixel/s, while the 880M achieves 46.40 GPixel/s. Texture rates are 2,457.6 GTexel/s for the MI355X versus 139.2 GTexel/s for the 880M.

Power and packaging reflect their roles. The MI355X has a thermal design power of 1400 W, uses an OAM module slot, and requires no power connectors but suggests an 1800 W power supply. The 880M has a 15 W TDP, uses an IGP slot, has no power connectors, and no suggested PSU. The MI355X uses PCIe 5.0 x16 while the 880M uses PCIe 4.0 x8.

Where Each One Wins

The MI355X wins decisively in raw compute throughput. Its FP32 performance of 78.64 TFLOPS and FP16 performance of 78.64 TFLOPS at 1:1 ratio dwarf the 880M's 4.454 TFLOPS in both precision formats. The MI355X's texture rate of 2,457.6 GTexel/s is over 17 times the 880M's 139.2 GTexel/s. Memory bandwidth of 8.19 TB/s versus system dependent bandwidth gives the MI355X an overwhelming advantage for memory-intensive workloads.

The 880M wins in areas where an integrated GPU operates. It has 16 ROPs delivering 46.40 GPixel/s, while the MI355X has zero ROPs and zero pixel rate. This means the MI355X is not designed for rasterization output, while the 880M handles pixel processing. The 880M also has 12 ray tracing cores, a feature absent from the MI355X's listed specifications. The 880M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI355X has no API support listed.

Clock behavior favors the 880M in boosting. The 880M's base clock of 400 MHz boosts to 2900 MHz, a 7.25 times increase. The MI355X's base clock of 1000 MHz boosts to 2400 MHz, a 2.4 times increase. The 880M's higher boost clock relative to base suggests better frequency scaling under load, though the MI355X's absolute FP32 output remains far higher.

For practical use cases, the 880M suits portable devices with display outputs that are portable device dependent. The MI355X has no display outputs, indicating it is not intended for direct video output. The 880M's 15 W power envelope allows integration into mobile systems, while the MI355X's 1400 W TDP requires dedicated accelerator infrastructure.

FAQ

Q: Which processor has higher FP32 compute performance?

A: The AMD Instinct MI355X delivers 78.64 TFLOPS FP32, while the AMD Radeon 880M delivers 4.454 TFLOPS. The MI355X is approximately 17.7 times higher in this metric.

Q: Does the AMD Radeon 880M support ray tracing?

A: Yes, the 880M includes 12 ray tracing cores. The AMD Instinct MI355X does not list ray tracing cores in its specifications.

Q: What memory configuration does each processor use?

A: The MI355X uses 288 GB of HBM3e memory on an 8192 bit bus with 8.19 TB/s bandwidth. The 880M uses system shared memory with system dependent bandwidth and bus width.

Q: How do their benchmark percentiles compare?

A: The MI355X has a percentile of 50 against all GPUs with an average benchmark score of zero. The 880M has a percentile of 43 with an average benchmark score of 8436.

Q: What are the power requirements for each?

A: The MI355X has a TDP of 1400 W and suggests an 1800 W power supply. The 880M has a TDP of 15 W with no suggested power supply listed.

Q: Which processor supports DirectX 12 Ultimate?

A: Only the AMD Radeon 880M lists DirectX 12 Ultimate (12_2) support. The AMD Instinct MI355X has no DirectX, OpenGL, or Vulkan API support listed.

Specification Differences

| Specification | AMD Instinct MI355X | AMD Radeon 880M |

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

| Chip | MI350 256CU | Strix Point |

| Architecture | CDNA 4.0 | RDNA 3.5 |

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

| Process Node | 3 nm | 4 nm |

| Transistors | 185,000 million | 34,000 million |

| Die Size | 2380 mm² | 233 mm² |

| Transistor Density | 77.7M / mm² | 145.9M / mm² |

| Base Clock | 1000 MHz | 400 MHz |

| Boost Clock | 2400 MHz | 2900 MHz |

| Memory Size | 288 GB | System Shared |

| Memory Type | HBM3e | System Shared |

| Memory Bus Width | 8192 bit | System Shared |

| Memory Bandwidth | 8.19 TB/s | System Dependent |

| Shading Units | 16384 | 768 |

| TMUs | 1024 | 48 |

| ROPs | 0 | 16 |

| Ray Tracing Cores | Not listed | 12 |

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

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

| FP32 Performance | 78.64 TFLOPS | 4.454 TFLOPS |

| FP16 Performance | 78.64 TFLOPS (1:1) | 4.454 TFLOPS (1:1) |

| TDP | 1400 W | 15 W |

| Slot Width | OAM Module | IGP |

| Suggested PSU | 1800 W | Not listed |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 x8 |

| Display Outputs | No outputs | Portable Device Dependent |

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

| OpenGL Support | N/A | 4.6 |

| Vulkan Support | N/A | 1.4 |

| Release Date | 2025-06-11 | 2024-07-14 |

| Predecessor | Radeon Instinct | Navi II IGP |

The Verdict

The data indicates two processors built for entirely different segments. The AMD Instinct MI355X is an accelerator with massive compute resources: 16384 shading units, 288 GB of HBM3e memory, 8.19 TB/s bandwidth, and 78.64 TFLOPS FP32. Its 1400 W TDP and OAM module form factor place it in server or data center environments where raw throughput matters more than power efficiency or display output.

The AMD Radeon 880M is an integrated graphics processor for mobile devices. Its 15 W TDP, 768 shading units, and system shared memory suit it for portable systems. The 880M's recorded benchmarks show an average score of 8436, placing it within 1.3 percent of several older discrete mobile GPUs like the NVIDIA GeForce GTX 675MX, NVIDIA GeForce MX330, and AMD Radeon HD 8870M. Its 43rd percentile ranking indicates mid-tier performance among all GPUs in the database.

Users requiring high-throughput compute, massive memory capacity, or extreme bandwidth should select the MI355X based on its specifications. Users needing a low-power integrated GPU with display output, ray tracing support, and modern API compatibility should select the 880M. The MI355X's lack of benchmark scores and display outputs confirms it is not a consumer graphics solution, while the 880M's active production status and portable device dependent outputs confirm its mobile focus. The choice between them depends entirely on the workload and platform requirements.