AMD Instinct MI300X vs NVIDIA H20 NVL16 Comparison

Head-to-Head Benchmarks

The recorded data for the AMD Instinct MI300X and NVIDIA H20 NVL16 presents a stark contrast in benchmark availability. The MI300X holds a Geekbench OpenCL score of 317,994, placing it in the 100th percentile among all GPUs in the database. This score positions it 5% behind the NVIDIA H200 NVL, which records an average of 334,891, and 8% behind the NVIDIA B200 at 345,482. Conversely, the MI300X sits 7.5% ahead of the NVIDIA L40S, which scores 295,763, and 10.7% ahead of the NVIDIA RTX 6000 Ada Generation, which scores 287,237.

The H20 NVL16, however, has no benchmark scores recorded in the database, with an average benchmark score of 0 and a percentile rank of 50. This absence of data means no direct head-to-head comparison can be drawn from measured results. The database contains an empty head-to-head benchmarks array for both items, and neither item records a win count. The MI300X shows a single entry in its benchmark suite, while the H20 NVL16 shows none.

For the MI300X, the OpenCL result indicates strong absolute performance, but its relative standing shows it is not the top performer in the database. The 5% gap to the H200 NVL and the 8% gap to the B200 suggest those accelerators hold a measurable advantage in this specific workload. The 7.5% lead over the L40S and the 10.7% lead over the RTX 6000 Ada Generation confirm that the MI300X outpaces those mid-range data center options by a clear margin.

Without any recorded scores for the H20 NVL16, the data cannot confirm its performance tier relative to the MI300X. The percentile field of 50 for the H20 NVL16 reflects its median position based on the absence of benchmark submissions, not a measured result. This is a critical distinction: the MI300X percentile of 100 derives from an actual score, while the H20 NVL16 percentile of 50 derives from no data at all.

Architecture Differences

The two accelerators diverge fundamentally in architecture, chip design, and compute resources. The AMD Instinct MI300X uses the CDNA 3.0 architecture on the Aqua Vanjaram chip, built on a 5 nm process at TSMC. The NVIDIA H20 NVL16 uses the Hopper architecture on the GH100 chip, also on a 5 nm process at TSMC. Both share the same process node and foundry, but their transistor budgets differ substantially.

The MI300X integrates 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4 million per mm². The H20 NVL16 integrates 80,000 million transistors on an 814 mm² die, yielding a density of 98.3 million per mm². The MI300X therefore carries nearly twice the transistor count and a higher packing density, reflecting its larger and more complex silicon.

Memory configurations also differ sharply. The MI300X offers 192 GB of HBM3 on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The H20 NVL16 offers 96 GB of HBM3 on a 6144-bit bus, delivering 4.03 TB/s. The MI300X doubles the memory capacity and provides about 32% more bandwidth, a significant advantage for large model residency and memory-bound workloads.

Compute resources show further divergence. The MI300X contains 19,456 shading units, 1,216 texture mapping units, and records a texture rate of 2,553.6 GTexel/s. Its FP32 throughput is 81.72 TFLOPS, with FP16 also at 81.72 TFLOPS on a 1:1 ratio. The H20 NVL16 contains 9,984 shading units, 312 texture mapping units, 24 ROPs, and 312 tensor cores. Its texture rate is 617.8 GTexel/s, its pixel rate is 47.52 GPixel/s, its FP32 throughput is 39.54 TFLOPS, and its FP16 throughput is 79.07 TFLOPS on a 2:1 ratio. The MI300X has nearly twice the shading units and four times the texture units, while the H20 NVL16 includes tensor cores and ROPs that the MI300X does not list.

Clock speeds differ as well. The MI300X runs a base clock of 1000 MHz and a boost clock of 2100 MHz, with memory at 1300 MHz (5.2 Gbps effective). The H20 NVL16 runs a base clock of 1830 MHz and a boost clock of 1980 MHz, with memory at 1313 MHz (5.3 Gbps effective). The H20 NVL16 has a higher base clock, while the MI300X has a higher boost clock. The memory clocks are nearly identical.

Power and physical specifications also differ. The MI300X has a TDP of 750 W and a suggested PSU of 1150 W, mounted as an OAM Module with no power connectors listed. The H20 NVL16 has a TDP of 400 W and a suggested PSU of 800 W, mounted as an SXM Module. Both use a PCIe 5.0 x16 bus interface and have no display outputs. Neither supports DirectX, OpenGL, or Vulkan per the API fields.

The release dates differ by nearly two years. The MI300X was released on December 5, 2023, while the H20 NVL16 was released on September 1, 2025. The H20 NVL16 has a production status of Active, while the MI300X does not list one. The H20 NVL16 lists its predecessor as Server Ada and its successor as Server Blackwell, while the MI300X lists its predecessor as Radeon Instinct and no successor.

FAQ

Q: How much faster is the AMD Instinct MI300X than the NVIDIA H20 NVL16 in the recorded benchmarks?

A: The database contains no direct benchmark comparison. The MI300X has a Geekbench OpenCL score of 317,994, while the H20 NVL16 has no recorded scores. A performance delta cannot be computed from measured data.

Q: What is the memory capacity difference between the two accelerators?

A: The MI300X has 192 GB of HBM3, while the H20 NVL16 has 96 GB of HBM3. The MI300X provides exactly double the memory capacity.

Q: Which accelerator has higher FP16 compute throughput?

A: The MI300X records 81.72 TFLOPS FP16 on a 1:1 ratio. The H20 NVL16 records 79.07 TFLOPS FP16 on a 2:1 ratio. The MI300X has a slight numerical lead of about 3.3% in raw FP16 throughput.

Q: How do the transistor counts compare?

A: The MI300X contains 153,000 million transistors, while the H20 NVL16 contains 80,000 million transistors. The MI300X has roughly 91% more transistors.

Q: What are the power requirements for each module?

A: The MI300X has a TDP of 750 W and a suggested PSU of 1150 W. The H20 NVL16 has a TDP of 400 W and a suggested PSU of 800 W.

Q: Which accelerator has a higher boost clock?

A: The MI300X has a boost clock of 2100 MHz. The H20 NVL16 has a boost clock of 1980 MHz. The MI300X boost clock is 120 MHz higher.

The Verdict

The data supports a clear differentiation based on measured results and architectural specifications. The AMD Instinct MI300X is the only one of the two with a recorded benchmark score, and that score places it in the 100th percentile of all GPUs in the database. Its nearest rivals show it trailing the H200 NVL by 5% and the B200 by 8%, but leading the L40S by 7.5% and the RTX 6000 Ada Generation by 10.7%. This indicates the MI300X sits in the upper tier of data center accelerators, competitive with the fastest options in the database.

The NVIDIA H20 NVL16 has no benchmark data, so its performance cannot be verified against the MI300X or any other accelerator. The database records no wins for either item, and the head-to-head benchmark array is empty. Any performance claim for the H20 NVL16 would lack evidentiary support from the recorded measurements.

Beyond benchmarks, the MI300X offers substantial specification advantages. Its 192 GB memory capacity doubles the H20 NVL16's 96 GB, and its 5.32 TB/s bandwidth exceeds the H20 NVL16's 4.03 TB/s by roughly 32%. The MI300X also provides higher FP32 throughput at 81.72 TFLOPS versus 39.54 TFLOPS, and a higher FP16 throughput at 81.72 TFLOPS versus 79.07 TFLOPS. The MI300X carries 153,000 million transistors versus 80,000 million, and its texture rate of 2,553.6 GTexel/s is more than four times the H20 NVL16's 617.8 GTexel/s.

The H20 NVL16 does hold advantages in certain areas. Its TDP of 400 W is substantially lower than the MI300X's 750 W, and its suggested PSU of 800 W is lower than the MI300X's 1150 W. Its base clock of 1830 MHz is higher than the MI300X's 1000 MHz. It also includes 312 tensor cores and 24 ROPs, features not listed for the MI300X, and it has a production status of Active with a defined successor, whereas the MI300X lists no successor.

For users prioritizing measured performance and maximum memory capacity, the data favors the MI300X. Its recorded benchmark score, 100th percentile ranking, double memory capacity, and higher compute throughput make it the stronger choice on paper. For users prioritizing lower power consumption and a more recent release, the H20 NVL16 offers a 400 W TDP and a 2025 release date, but without benchmark confirmation of its performance. The verdict from the database is straightforward: the MI300X has proven performance data, while the H20 NVL16 does not.

Specification Differences

| Specification | AMD Instinct MI300X | NVIDIA H20 NVL16 |

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

| Architecture | CDNA 3.0 | Hopper |

| Chip | Aqua Vanjaram | GH100 |

| Process Node | 5 nm | 5 nm |

| Foundry | TSMC | TSMC |

| Transistors | 153,000 million | 80,000 million |

| Die Size | 1017 mm² | 814 mm² |

| Transistor Density | 150.4M / mm² | 98.3M / mm² |

| Base Clock | 1000 MHz | 1830 MHz |

| Boost Clock | 2100 MHz | 1980 MHz |

| Memory Size | 192 GB | 96 GB |

| Memory Type | HBM3 | HBM3 |

| Memory Bus Width | 8192 bit | 6144 bit |

| Memory Bandwidth | 5.32 TB/s | 4.03 TB/s |

| Shading Units | 19,456 | 9,984 |

| TMUs | 1,216 | 312 |

| ROPs | 0 | 24 |

| Tensor Cores | Not listed | 312 |

| Pixel Rate | 0 MPixel/s | 47.52 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 617.8 GTexel/s |

| FP32 Performance | 81.72 TFLOPS | 39.54 TFLOPS |

| FP16 Performance | 81.72 TFLOPS (1:1) | 79.07 TFLOPS (2:1) |

| TDP | 750 W | 400 W |

| Slot Width | OAM Module | SXM Module |

| Suggested PSU | 1150 W | 800 W |

| Release Date | 2023-12-05 | 2025-09-01 |

| Production Status | Not listed | Active |

| Predecessor | Radeon Instinct | Server Ada |

| Successor | Not listed | Server Blackwell |