AMD Instinct MI300A vs NVIDIA H20 NVL16 Comparison

Head-to-Head Benchmarks

The recorded data for both accelerators is limited to specification-level measurements, with no runner scores in the benchmark database. The aggregate percentile placement for both parts sits at the 50th percentile against all GPUs, and the average benchmark score for each is zero, which means the database has not yet accumulated any workload-based results for either the AMD Instinct MI300A or the NVIDIA H20 NVL16.

Because no head-to-head benchmark entries exist, the analysis must rely on derived performance metrics from the specification sheets. The AMD Instinct MI300A delivers 61.29 TFLOPS of FP32 throughput, while the NVIDIA H20 NVL16 delivers 39.54 TFLOPS. That places the MI300A roughly 55% ahead of the H20 in single-precision compute, a substantial margin for workloads that depend on dense FP32 math. In texture throughput, the MI300A reaches 1,915.2 GTexel/s against 617.8 GTexel/s for the H20, a lead of more than 3x, which follows from the MI300A's 912 TMUs versus 312 TMUs.

The NVIDIA part counters in FP16 performance. The H20 NVL16 records 79.07 TFLOPS for FP16 with a 2:1 rate, while the AMD part has no listed FP16 figure in the database. That makes the H20 the clear choice for half-precision workloads on paper, though the absence of a comparable FP16 number for the MI300A leaves the comparison incomplete.

Memory bandwidth also separates the two. The MI300A moves 5.32 TB/s across an 8192-bit bus, while the H20 reaches 4.03 TB/s over a 6144-bit bus. The AMD part holds a 32% bandwidth advantage, which can matter for large matrix operations or data movement-heavy inference tasks. The H20 counters with a higher base clock of 1830 MHz versus 1000 MHz on the MI300A, and a boost clock of 1980 MHz versus 2100 MHz, so the NVIDIA part runs at higher idle and sustained frequencies, but the AMD part has a higher ceiling.

The pixel rate column shows a stark divergence. The MI300A reports 0 MPixel/s with 0 ROPs, while the H20 reports 47.52 GPixel/s with 24 ROPs. These parts are not designed for rasterization output, and the MI300A's zero ROP count reflects its pure compute orientation. The H20, by contrast, retains a minimal raster pipeline, but neither part has display outputs.

Architecture Differences

The two accelerators come from different architectural families. The AMD Instinct MI300A uses CDNA 3.0, built on the Aqua Vanjaram chip, while the NVIDIA H20 NVL16 uses the Hopper architecture with the GH100 die. Both are fabricated on a 5 nm process at TSMC, so manufacturing technology is identical, but the chip designs diverge sharply.

Transistor counts reveal the scale difference. The MI300A packs 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4M per mm². The H20 contains 80,000 million transistors on an 814 mm² die, for a density of 98.3M per mm². The AMD part has nearly twice the transistor budget and a 25% larger die, which explains its higher raw compute and bandwidth figures.

Shader resources favor the MI300A. It carries 14,592 shading units and 912 texture mapping units, while the H20 carries 9,984 shading units and 312 TMUs. The NVIDIA part includes 312 tensor cores, a feature the AMD specification sheet does not list. The MI300A has 0 ROPs; the H20 has 24. Neither part exposes ray tracing cores in the database.

Memory configuration differs in capacity and width. The MI300A has 128 GB of HBM3 on an 8192-bit bus, while the H20 has 96 GB of HBM3 on a 6144-bit bus. The effective memory speed is nearly identical: 5.2 Gbps for the AMD part and 5.3 Gbps for the NVIDIA part, with corresponding memory clocks of 1300 MHz and 1313 MHz. The larger bus width on the MI300A is what produces its higher bandwidth.

Power and physical design also differ. The MI300A draws 750 W TDP and ships as an OAM Module with no power connectors listed and a suggested PSU of 1150 W. The H20 draws 400 W TDP, ships as an SXM Module, and has a suggested PSU of 800 W. Both use PCIe 5.0 x16 interfaces, and neither has display outputs. The API support columns show N/A for DirectX, OpenGL, and Vulkan on both parts, confirming their compute-only roles.

Release timing separates the generations. The MI300A entered the database with a release date of December 5, 2023, and its predecessor is listed as Radeon Instinct. The H20 carries a release date of September 1, 2025, with a predecessor of Server Ada and a successor of Server Blackwell. The H20 is marked as Active in production status, while the MI300A has no production status recorded.

Where Each One Wins

The AMD Instinct MI300A wins in raw FP32 compute, texture throughput, memory capacity, memory bandwidth, and transistor scale. For dense single-precision math, simulation workloads, or any task that stresses FP32 FLOPS, the 61.29 TFLOPS figure gives it a decisive edge over the H20's 39.54 TFLOPS. The 128 GB memory capacity also matters for very large models or datasets that must stay resident on the accelerator, and the 5.32 TB/s bandwidth supports feeding that capacity quickly.

The NVIDIA H20 NVL16 wins in FP16 throughput, clock rates, pixel output, and power efficiency. The 79.07 TFLOPS FP16 figure is the only half-precision measurement recorded for either part, so the H20 is the better match for workloads that rely on FP16 tensor math. Its higher base clock of 1830 MHz means sustained operation at a higher frequency floor, which can translate to better latency behavior for some workloads. The 24 ROPs and 47.52 GPixel/s pixel rate, while minimal, are still nonzero, giving the H20 at least some rasterization capability. The 400 W TDP against 750 W means the H20 draws less power per module, which can influence deployment density in power-constrained systems.

The MI300A also leads in transistor density at 150.4M per mm² versus 98.3M per mm², indicating a more efficient use of die area for compute resources. The H20 counters with a smaller die and fewer transistors, which correlates with its lower power draw.

For mixed workloads, the choice depends on precision requirements. FP32-heavy code favors the MI300A by a wide margin. FP16-heavy code favors the H20, since no FP16 data exists for the AMD part. Memory-bound tasks favor the MI300A on bandwidth and capacity. Power-sensitive installations favor the H20.

FAQ

Q: Which accelerator has higher FP32 performance?

A: The AMD Instinct MI300A delivers 61.29 TFLOPS of FP32 throughput, compared to 39.54 TFLOPS for the NVIDIA H20 NVL16, a lead of roughly 55%.

Q: How does memory capacity compare between the two?

A: The MI300A has 128 GB of HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth. The H20 NVL16 has 96 GB of HBM3 on a 6144-bit bus with 4.03 TB/s bandwidth.

Q: Does the NVIDIA H20 NVL16 support FP16 compute?

A: Yes, the H20 NVL16 records 79.07 TFLOPS for FP16 at a 2:1 rate. The AMD MI300A has no FP16 figure listed in the database.

Q: What are the power requirements for each module?

A: The MI300A has a TDP of 750 W with a suggested PSU of 1150 W. The H20 NVL16 has a TDP of 400 W with a suggested PSU of 800 W.

Q: What form factors do these accelerators use?

A: The MI300A is an OAM Module, while the H20 NVL16 is an SXM Module. Both use a PCIe 5.0 x16 bus interface and have no display outputs.

Q: Which part has more texture units?

A: The MI300A has 912 texture mapping units and reaches 1,915.2 GTexel/s. The H20 NVL16 has 312 texture mapping units and reaches 617.8 GTexel/s.

Specification Differences

The two accelerators differ across nearly every recorded specification field. The MI300A uses the CDNA 3.0 architecture on the Aqua Vanjaram chip, while the H20 uses Hopper on the GH100 chip. The MI300A has 153,000 million transistors on a 1017 mm² die; the H20 has 80,000 million transistors on an 814 mm² die. Transistor density stands at 150.4M per mm² for the AMD part and 98.3M per mm² for the NVIDIA part.

Clock speeds differ in both base and boost. The MI300A runs at 1000 MHz base and 2100 MHz boost. The H20 runs at 1830 MHz base and 1980 MHz boost. Memory clocks are 1300 MHz with 5.2 Gbps effective for the MI300A and 1313 MHz with 5.3 Gbps effective for the H20.

Memory capacity, bus width, and bandwidth all favor the MI300A: 128 GB, 8192 bit, and 5.32 TB/s versus 96 GB, 6144 bit, and 4.03 TB/s. Shader counts show 14,592 shading units and 912 TMUs for the AMD part, versus 9,984 shading units and 312 TMUs for the NVIDIA part. The MI300A has 0 ROPs and a 0 MPixel/s pixel rate; the H20 has 24 ROPs and a 47.52 GPixel/s pixel rate. Tensor cores are listed only for the H20 at 312 units.

FP32 output is 61.29 TFLOPS for the MI300A and 39.54 TFLOPS for the H20. FP16 is listed only for the H20 at 79.07 TFLOPS with a 2:1 rate. Texture rate is 1,915.2 GTexel/s for the AMD part and 617.8 GTexel/s for the NVIDIA part.

Power and physical specifications differ as well. TDP is 750 W for the MI300A and 400 W for the H20. The MI300A is an OAM Module with no power connectors listed; the H20 is an SXM Module with 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.

Release dates are December 5, 2023 for the MI300A and September 1, 2025 for the H20. The MI300A lists Radeon Instinct as its predecessor with no successor. The H20 lists Server Ada as its predecessor and Server Blackwell as its successor, with an Active production status. The MI300A has no production status recorded. Neither part has a launch MSRP in the database, and both sit at the 50th percentile against all GPUs with an average benchmark score of zero.