AMD Radeon Instinct MI300A vs NVIDIA B200 SXM6 Comparison

Where Each One Wins

The recorded data shows no direct head-to-head benchmark wins for either processor in this comparison. Both the AMD Radeon Instinct MI300A and the NVIDIA B200 SXM6 sit at the 50th percentile against all GPUs in the database, with an average benchmark score of zero for each. This indicates that neither part has accumulated measured performance results in the current database entries. Without benchmark scores, the use-case split must be derived from architectural and specification differences rather than measured wins.

The AMD Radeon Instinct MI300A delivers a higher FP32 throughput at 81.72 TFLOPS, which positions it for workloads that rely on standard precision compute. Its FP16 output reaches 653.7 TFLOPS with an 8:1 ratio, indicating a design that heavily favors reduced-precision math with a large conversion factor. The NVIDIA B200 SXM6 counters with 69.34 TFLOPS in both FP32 and FP16, using a 1:1 ratio, meaning it sustains the same throughput regardless of precision level. This makes the B200 the more predictable choice for mixed-precision pipelines where FP16 and FP32 workloads appear in similar proportions.

Memory capacity and bandwidth also separate the two. The MI300A carries 192 GB of HBM3 memory with a 10.3 TB/s bandwidth, while the B200 SXM6 uses 180 GB of HBM3e with 8.19 TB/s. The AMD part offers more capacity and higher bandwidth, which supports larger datasets and memory-bound operations. The NVIDIA part uses a newer memory type, HBM3e, which may offer different latency characteristics, but the recorded numbers show the AMD part ahead in raw capacity and transfer rate.

Texture processing differs substantially. The MI300A has 1,216 texture mapping units and a texture rate of 2,553.6 GTexel/s, whereas the B200 SXM6 has 592 TMUs and a texture rate of 1,083.4 GTexel/s. The AMD part more than doubles the texture throughput, which matters for workloads that sample textures heavily. The B200 SXM6 includes 24 ROPs and a pixel rate of 43.92 GPixel/s, while the MI300A has zero ROPs and a pixel rate of 0 MPixel/s, so the NVIDIA part handles rasterization output while the AMD part does not.

Architecture Differences

The two processors come from different architecture families. The AMD Radeon Instinct MI300A uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, part of the Radeon Instinct generation. The NVIDIA B200 SXM6 uses the Blackwell architecture with the GB100 chip, part of the Server Blackwell generation. Both are built on a 5 nm process at TSMC, but the transistor counts and die sizes diverge significantly.

The MI300A packs 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4M per mm². The B200 SXM6 carries 208,000 million transistors on a 1628 mm² die, with a lower density of 127.8M per mm². The NVIDIA chip has more transistors overall and a larger physical die, while the AMD chip achieves higher density per square millimeter.

Clock behavior differs markedly. The MI300A has a base clock of 1000 MHz and a boost clock of 2100 MHz. The B200 SXM6 lists a base clock of 120 MHz and a boost clock of 1830 MHz. The very low base clock on the NVIDIA part suggests a different power management strategy, likely relying on boost behavior under load. The AMD part starts higher and boosts to a higher peak.

Memory architecture shows both parts using an 8192-bit bus width, but the memory types and speeds differ. The MI300A uses HBM3 at 2525 MHz with 10.1 Gbps effective, while the B200 SXM6 uses HBM3e at 2000 MHz with 8 Gbps effective. Shader unit counts are close, with the MI300A at 19,456 shading units and the B200 SXM6 at 18,944. The NVIDIA part includes 592 tensor cores, while the AMD part lists no tensor core count. The MI300A has 1,216 TMUs versus 592 on the B200, and the ROP situation is reversed: the AMD part has zero, the NVIDIA part has 24.

Power requirements differ. The MI300A has a TDP of 750 W with a suggested PSU of 1150 W, while the B200 SXM6 has a TDP of 1000 W with a suggested PSU of 1400 W. The slot widths differ as well, with the MI300A using an OAM Module and the B200 using an SXM Module. Bus interfaces also differ: the MI300A uses PCIe 5.0 x16, while the B200 SXM6 uses PCIe 6.0 x16.

Head-to-Head Benchmarks

No recorded benchmark scores exist for either processor in the database, so a direct numerical comparison of measured performance is not possible. The wins fields show zero for both parts, and the head-to-head benchmark array is empty. What the data does provide is specification-level comparisons that indicate where each part holds an advantage.

In FP32 compute, the MI300A delivers 81.72 TFLOPS against 69.34 TFLOPS for the B200 SXM6. That is a 12.38 TFLOPS gap, or roughly 18% higher throughput for the AMD part in single-precision workloads. For FP16, the gap is far larger: the MI300A reaches 653.7 TFLOPS with an 8:1 ratio, while the B200 SXM6 reaches 69.34 TFLOPS with a 1:1 ratio. The AMD part offers over nine times the FP16 throughput on paper, though the ratio difference means the comparison depends on how the workload maps to the hardware.

Memory bandwidth favors the MI300A at 10.3 TB/s versus 8.19 TB/s for the B200 SXM6, a difference of about 26%. Memory capacity also favors the AMD part, with 192 GB versus 180 GB, a 12 GB advantage. Texture rate is another clear win for the MI300A at 2,553.6 GTexel/s versus 1,083.4 GTexel/s, more than double. The B200 SXM6 counters with pixel rate, 43.92 GPixel/s versus 0 MPixel/s, and tensor cores, 592 present versus none listed.

Transistor count and die size favor the NVIDIA part, with 208,000 million transistors on a 1628 mm² die versus 153,000 million on 1017 mm². The B200 SXM6 also has a higher TDP at 1000 W versus 750 W, and a later release date of 2024-10-31 versus 2023-12-05 for the MI300A. The B200 SXM6 lists a launch MSRP of 34,999 USD, while the MI300A has no launch MSRP recorded.

FAQ

Q: Which part has higher FP32 compute throughput?

A: The AMD Radeon Instinct MI300A delivers 81.72 TFLOPS in FP32, while the NVIDIA B200 SXM6 delivers 69.34 TFLOPS. The AMD part is ahead by roughly 18%.

Q: How do the memory capacities compare?

A: The MI300A has 192 GB of HBM3 memory with a bandwidth of 10.3 TB/s. The B200 SXM6 has 180 GB of HBM3e memory with a bandwidth of 8.19 TB/s. The AMD part offers more capacity and higher bandwidth.

Q: What is the FP16 performance difference?

A: The MI300A reaches 653.7 TFLOPS in FP16 with an 8:1 ratio, while the B200 SXM6 reaches 69.34 TFLOPS with a 1:1 ratio. The AMD part shows substantially higher FP16 throughput on paper.

Q: Does the NVIDIA part have tensor cores?

A: The B200 SXM6 lists 592 tensor cores. The MI300A does not list a tensor core count in the database.

Q: What are the power requirements for each?

A: The MI300A has a TDP of 750 W and a suggested PSU of 1150 W. The B200 SXM6 has a TDP of 1000 W and a suggested PSU of 1400 W.

Q: Which part uses a newer PCIe interface?

A: The B200 SXM6 uses PCIe 6.0 x16, while the MI300A uses PCIe 5.0 x16. The NVIDIA part has the newer bus interface.

Specification Differences

| Field | AMD Radeon Instinct MI300A | NVIDIA B200 SXM6 |

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

| Chip | Aqua Vanjaram | GB100 |

| Architecture | CDNA 3.0 | Blackwell |

| Generation | Radeon Instinct (MIx) | Server Blackwell (Bxx) |

| Process Node | 5 nm | 5 nm |

| Transistors | 153,000 million | 208,000 million |

| Die Size | 1017 mm² | 1628 mm² |

| Transistor Density | 150.4M / mm² | 127.8M / mm² |

| Base Clock | 1000 MHz | 120 MHz |

| Boost Clock | 2100 MHz | 1830 MHz |

| Memory Size | 192 GB | 180 GB |

| Memory Type | HBM3 | HBM3e |

| Memory Clock | 2525 MHz, 10.1 Gbps effective | 2000 MHz, 8 Gbps effective |

| Memory Bandwidth | 10.3 TB/s | 8.19 TB/s |

| Shading Units | 19,456 | 18,944 |

| TMUs | 1,216 | 592 |

| ROPs | 0 | 24 |

| Tensor Cores | None listed | 592 |

| Pixel Rate | 0 MPixel/s | 43.92 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 1,083.4 GTexel/s |

| FP32 | 81.72 TFLOPS | 69.34 TFLOPS |

| FP16 | 653.7 TFLOPS (8:1) | 69.34 TFLOPS (1:1) |

| TDP | 750 W | 1000 W |

| Slot Width | OAM Module | SXM Module |

| Suggested PSU | 1150 W | 1400 W |

| Bus Interface | PCIe 5.0 x16 | PCIe 6.0 x16 |

| Release Date | 2023-12-05 | 2024-10-31 |

| Launch MSRP | None recorded | 34,999 USD |

| Production Status | Not recorded | Active |

| Predecessor | FirePro Data Center | Server Hopper |

| Successor | None recorded | Server Rubin |

The Verdict

The data supports a split decision based on workload type. For FP32-heavy compute and memory-bound tasks, the AMD Radeon Instinct MI300A holds clear specification advantages: higher FP32 throughput at 81.72 TFLOPS, more memory at 192 GB, higher bandwidth at 10.3 TB/s, and more than double the texture rate at 2,553.6 GTexel/s. The MI300A also draws less power at 750 W TDP versus 1000 W TDP, which reduces the suggested PSU requirement from 1400 W down to 1150 W.

For workloads that need tensor core acceleration, rasterization output, or the latest bus interface, the NVIDIA B200 SXM6 is the stronger pick. It includes 592 tensor cores, has 24 ROPs with a 43.92 GPixel/s pixel rate, and uses PCIe 6.0 x16. It also carries a larger transistor count at 208,000 million and a larger die at 1628 mm², which suggests more raw hardware resources despite lower clock speeds.

The FP16 comparison is less straightforward. The MI300A shows 653.7 TFLOPS with an 8:1 ratio, meaning the hardware likely processes FP16 at a fraction of the theoretical rate when converted to FP32 operations. The B200 SXM6 shows 69.34 TFLOPS with a 1:1 ratio, so its FP16 throughput matches its FP32 throughput directly. For applications that can use the 8:1 conversion efficiently, the AMD part offers a large theoretical advantage. For applications that need sustained 1:1 FP16 performance, the two parts are equal at 69.34 TFLOPS.

The release timeline favors the NVIDIA part, which launched on 2024-10-31 versus 2023-12-05 for the AMD part, and the B200 SXM6 is listed as Active in production while the MI300A has no production status recorded. The B200 SXM6 has a successor listed as Server Rubin, while the MI300A has no successor recorded, indicating the NVIDIA part has a clearer roadmap position.

The absence of benchmark results means these conclusions rest entirely on specification data. The MI300A suits workloads that prioritize raw FP32 throughput, large memory capacity, high bandwidth, and texture processing. The B200 SXM6 suits workloads that need tensor cores, pixel output, PCIe 6.0 connectivity, and a newer production status. Builders should match the part to the dominant workload type, since neither part leads across all categories.