AMD Radeon Instinct MI300A vs NVIDIA H20 NVL16 Comparison

Head-to-Head Benchmarks

The recorded database contains no head-to-head benchmark entries for the AMD Radeon Instinct MI300A versus the NVIDIA H20 NVL16. Neither accelerator has any benchmark scores listed, and the wins tally sits at zero for both parts. This absence of measured data means direct performance comparisons cannot be quantified from our measurements. The percentile ranking for both GPUs is 50.0, placing each at the median of all recorded graphics processors in the database, though this percentile is derived from an empty benchmark set and should be interpreted cautiously.

The AMD Radeon Instinct MI300A delivers 81.72 TFLOPS of FP32 compute, while the NVIDIA H20 NVL16 provides 39.54 TFLOPS. In raw single-precision throughput, the AMD part offers more than double the FP32 performance. For FP16 workloads, the MI300A reaches 653.7 TFLOPS using an 8:1 ratio, whereas the H20 NVL16 achieves 79.07 TFLOPS with a 2:1 ratio. The FP16 gap is substantial, with the AMD solution exceeding the NVIDIA part by a factor of roughly 8.3 in peak half-precision throughput.

Memory bandwidth favors the AMD accelerator decisively. The MI300A carries 192 GB of HBM3 across an 8192-bit bus, producing 10.3 TB/s of bandwidth. The H20 NVL16 ships with 96 GB of HBM3 on a 6144-bit interface, yielding 4.03 TB/s. The AMD part therefore provides 2.56 times the memory bandwidth of the NVIDIA solution and doubles the memory capacity.

Pixel processing presents a different picture. The MI300A lists a pixel rate of 0 MPixel/s with zero ROPs, indicating it is not designed for rasterization output. The H20 NVL16, by contrast, delivers 47.52 GPixel/s from its 24 ROPs. Texture throughput also diverges: the MI300A reaches 2,553.6 GTexel/s from 1216 TMUs, while the H20 NVL16 manages 617.8 GTexel/s from 312 TMUs. The AMD part is 4.1 times faster in texture fill rate.

Clock behavior differs notably between the two. The MI300A has a base clock of 1000 MHz and a boost clock of 2100 MHz, a spread of 1100 MHz between the two states. The H20 NVL16 runs at 1830 MHz base and 1980 MHz boost, a tighter 150 MHz range. Despite the NVIDIA part's higher base frequency, the AMD component's boost ceiling surpasses it by 120 MHz.

Shader and tensor configurations show architectural divergence. The MI300A includes 19,456 shading units and 1216 TMUs, while the H20 NVL16 has 9,984 shading units and 312 TMUs. The NVIDIA part carries 312 tensor cores; the AMD specification lists no tensor core count. The MI300A's shading unit count is 1.95 times that of the H20, and its TMU count is 3.9 times higher.

Transistor and die data reveal different design approaches. The MI300A integrates 153,000 million transistors on a 1017 mm² die, achieving a density of 150.4 million transistors per square millimeter. The H20 NVL16 contains 80,000 million transistors on an 814 mm² die, with a density of 98.3 million per square millimeter. Both use TSMC's 5 nm process, but the AMD implementation packs nearly double the transistor count into a 24.9% larger die area.

Where Each One Wins

The AMD Radeon Instinct MI300A wins decisively in compute throughput categories. Its FP32 figure of 81.72 TFLOPS is 2.07 times the H20's 39.54 TFLOPS, making it the stronger choice for workloads that rely on single-precision floating-point math. In FP16 operations, the MI300A's 653.7 TFLOPS versus 79.07 TFLOPS gives it an 8.27-fold advantage, which matters for AI training and inference tasks that use reduced precision. Memory capacity and bandwidth also favor AMD: 192 GB at 10.3 TB/s compared to 96 GB at 4.03 TB/s means the MI300A can hold larger models and move data between memory and compute faster.

Texture-heavy workloads belong to the AMD part. The 2,553.6 GTexel/s texture rate, backed by 1216 TMUs, exceeds the H20's 617.8 GTexel/s from 312 TMUs by a factor of 4.13. This suggests the MI300A handles filtering and texture sampling operations with greater throughput.

The NVIDIA H20 NVL16 wins in pixel output. Its 47.52 GPixel/s from 24 ROPs represents actual rasterization capability, while the MI300A lists 0 MPixel/s with no ROPs, effectively disabling pixel output. Any workload requiring frame buffer writes or display generation would rely on the NVIDIA part. The H20 also operates at a higher base clock of 1830 MHz versus 1000 MHz for the MI300A, which may benefit latency-sensitive tasks that spend time at base frequencies rather than boosting.

Power consumption differs, with the MI300A rated at 750 W versus 400 W for the H20 NVL16. The suggested power supply for the AMD part is 1150 W, while the NVIDIA module suggests 800 W. These figures indicate the MI300A demands significantly more power to sustain its higher compute throughput, while the H20 achieves its lower performance envelope at reduced power draw.

The H20 NVL16 carries an active production status, while the MI300A's production status is not listed in the database. The NVIDIA part also has a defined successor in Server Blackwell and a predecessor in Server Ada. The MI300A lists a predecessor of FirePro Data Center but no successor.

Architecture Differences

The two accelerators stem from different architectural lineages. The AMD Radeon Instinct MI300A uses CDNA 3.0 architecture with the Aqua Vanjaram chip, while the NVIDIA H20 NVL16 employs Hopper architecture with the GH100 chip. Both are fabricated on TSMC's 5 nm process, but their design philosophies diverge substantially.

Transistor counts and die sizes reflect distinct scaling strategies. The MI300A packs 153,000 million transistors into a 1017 mm² die, yielding a density of 150.4 million per square millimeter. The H20 NVL16 uses 80,000 million transistors on an 814 mm² die at 98.3 million per square millimeter. The AMD chip is 24.9% larger in area but contains 91.3% more transistors, indicating a denser, more compute-oriented layout.

Memory architecture differs in both width and capacity. The MI300A uses an 8192-bit bus with 192 GB of HBM3, while the H20 NVL16 uses a narrower 6144-bit bus with 96 GB. The effective memory clock also differs: the MI300A lists 2525 MHz with 10.1 Gbps effective, versus 1313 MHz with 5.3 Gbps effective for the H20. These parameters combine to produce the bandwidth figures of 10.3 TB/s and 4.03 TB/s respectively.

Shader organization varies considerably. The MI300A has 19,456 shading units and 1216 TMUs with zero ROPs, suggesting a pure compute pipeline with no traditional graphics output stages. The H20 NVL16 has 9,984 shading units, 312 TMUs, and 24 ROPs, retaining some graphics-oriented functionality despite being a server part. The NVIDIA chip also features 312 tensor cores, while the AMD specification does not list a tensor core count.

Clock behavior reflects different operating strategies. The MI300A spans from 1000 MHz base to 2100 MHz boost, a wide dynamic range of 1100 MHz that allows significant frequency scaling. The H20 NVL16 runs from 1830 MHz to 1980 MHz, a narrow 150 MHz range, suggesting a more fixed operating point. The NVIDIA part's base clock is 83% higher than AMD's, but its boost clock is 5.7% lower.

Physical form factors and power delivery differ. The MI300A uses an OAM Module slot width with no power connectors listed and a 750 W TDP. The H20 NVL16 uses an SXM Module slot width with no power connector data and a 400 W TDP. Both connect via PCIe 5.0 x16 and have no display outputs, though the NVIDIA part lists its DirectX, OpenGL, and Vulkan APIs as N/A, while the AMD part leaves these fields null.

Release timing separates the parts by nearly two years. The MI300A launched on December 5, 2023, while the H20 NVL16 is dated September 1, 2025. The NVIDIA part belongs to the Server Hopper generation with a specified successor, while the AMD part is in the Radeon Instinct MIx generation without a listed successor.

FAQ

Q: Which accelerator provides higher FP32 compute throughput?

A: The AMD Radeon Instinct MI300A delivers 81.72 TFLOPS of FP32 performance, compared to 39.54 TFLOPS for the NVIDIA H20 NVL16. The AMD part achieves roughly 2.07 times the single-precision throughput of the NVIDIA solution.

Q: How do the two compare in memory capacity and bandwidth?

A: The MI300A offers 192 GB of HBM3 memory on an 8192-bit bus, producing 10.3 TB/s of bandwidth. The H20 NVL16 provides 96 GB of HBM3 on a 6144-bit bus, yielding 4.03 TB/s. The AMD part has double the capacity and 2.56 times the bandwidth.

Q: Does either accelerator support pixel output operations?

A: The NVIDIA H20 NVL16 has 24 ROPs and delivers 47.52 GPixel/s. The AMD MI300A lists zero ROPs and a pixel rate of 0 MPixel/s, meaning it does not perform pixel output. The NVIDIA part retains rasterization capability while the AMD part is compute-only.

Q: What are the power requirements for each module?

A: The MI300A has a TDP of 750 W with a suggested power supply of 1150 W. The H20 NVL16 has a TDP of 400 W with a suggested power supply of 800 W. The AMD part draws 350 W more.

Q: Which architecture does each accelerator use?

A: The MI300A uses AMD's CDNA 3.0 architecture with the Aqua Vanjaram chip. The H20 NVL16 uses NVIDIA's Hopper architecture with the GH100 chip. Both are manufactured on TSMC's 5 nm process.

Q: When was each product released?

A: The AMD Radeon Instinct MI300A launched on December 5, 2023. The NVIDIA H20 NVL16 has a release date of September 1, 2025. The NVIDIA part is listed as active in production, while the AMD part's production status is not recorded.

Specification Differences

The two accelerators differ across nearly every recorded specification field. The MI300A uses the Aqua Vanjaram chip with CDNA 3.0 architecture, while the H20 NVL16 uses the GH100 chip with Hopper architecture. The MI300A belongs to the Radeon Instinct MIx generation; the H20 NVL16 belongs to the Server Hopper Hxx generation.

Transistor counts: 153,000 million for the MI300A versus 80,000 million for the H20. Die size: 1017 mm² versus 814 mm². Transistor density: 150.4 million per square millimeter versus 98.3 million per square millimeter. Both use TSMC's 5 nm process.

Clock specifications: the MI300A has a 1000 MHz base and 2100 MHz boost, with memory at 2525 MHz and 10.1 Gbps effective. The H20 NVL16 has an 1830 MHz base and 1980 MHz boost, with memory at 1313 MHz and 5.3 Gbps effective.

Memory: 192 GB of HBM3 on an 8192-bit bus at 10.3 TB/s for the MI300A. The H20 has 96 GB of HBM3 on a 6144-bit bus at 4.03 TB/s.

Compute units: the MI300A has 19,456 shading units, 1216 TMUs, and zero ROPs. The H20 has 9,984 shading units, 312 TMUs, and 24 ROPs. Tensor cores are not listed for the AMD part; the NVIDIA part has 312.

Throughput rates: pixel rate is 0 MPixel/s for the MI300A versus 47.52 GPixel/s for the H20. Texture rate is 2,553.6 GTexel/s versus 617.8 GTexel/s. FP32 is 81.72 TFLOPS versus 39.54 TFLOPS. FP16 is 653.7 TFLOPS at 8:1 versus 79.07 TFLOPS at 2:1.

Power and physical specs: the MI300A has a 750 W TDP with an OAM Module slot width and no power connectors listed. The H20 has a 400 W TDP with an SXM Module slot width and no power connector data. Suggested PSU is 1150 W for the AMD part and 800 W for the NVIDIA part. Both use PCIe 5.0 x16 and have no display outputs.

API support differs: the H20 NVL16 lists DirectX, OpenGL, and Vulkan as N/A. The MI300A leaves these fields null. Release dates are December 5, 2023 for the MI300A and September 1, 2025 for the H20. The NVIDIA part has a predecessor in Server Ada and a successor in Server Blackwell; the AMD part has a predecessor in FirePro Data Center and no successor listed.