AMD Instinct MI300A vs NVIDIA GB10 Comparison

Head-to-Head Benchmarks

The recorded data offers a lopsided comparison between the AMD Instinct MI300A and the NVIDIA GB10, primarily because the database contains measurable benchmark results for only one of the two parts. The NVIDIA GB10 has an average benchmark score of 117,393 across its recorded tests, placing it in the 95th percentile of all GPUs in the database. Its Geekbench OpenCL score is 120,137, while its Geekbench Vulkan score is 114,648. The AMD Instinct MI300A, by contrast, has no recorded benchmark scores, an average benchmark score of zero, and sits in the 50th percentile of all GPUs. This absence of data means the head-to-head comparison is necessarily quantitative for the GB10 and qualitative for the MI300A, relying on architectural specifications rather than measured performance.

The GB10's nearest rivals in the database illustrate its standing. It trails the AMD Radeon PRO W7700 by 1.3 percent, as that card averages 118,976 points. It leads the NVIDIA RTX 4000 SFF Ada Generation by 0.3 percent, which averages 117,088 points. Against the NVIDIA Tesla V100 SXM2 16 GB, the GB10 is ahead by 2.6 percent, with that older accelerator averaging 114,395 points. The gap widens to 3 percent over the NVIDIA RTX A5500 Mobile, which averages 113,944 points. These deltas are narrow, indicating the GB10 clusters tightly with a group of professional and workstation GPUs rather than dominating them. The MI300A has no nearest rivals listed, so no direct percentile or delta comparisons exist for it in the database.

The MI300A's theoretical throughput figures, however, suggest a different performance class. Its FP32 compute is listed at 61.29 TFLOPS, while the GB10 delivers 29.71 TFLOPS in FP32. That is a 2.06 times advantage for the AMD part on paper. The texture rate further separates them: the MI300A reaches 1,915.2 GTexel/s versus the GB10's 928.5 GTexel/s, a 2.06 times difference. The MI300A's pixel rate is listed as zero, which reflects its lack of dedicated ROPs, while the GB10 produces 116.1 GPixel/s. In memory bandwidth, the MI300A's 5.32 TB/s dwarfs the GB10's 273.2 GB/s, a 19.5 times gap. These are not measured benchmark scores, but the specification deltas are so large that the MI300A would be expected to outperform the GB10 in compute-heavy workloads, particularly those limited by memory bandwidth or FP32 throughput.

Architecture Differences

The two accelerators come from different architectural lineages. The AMD Instinct MI300A uses the CDNA 3.0 architecture on a chip codenamed Aqua Vanjaram, fabricated by TSMC on a 5 nm process. The NVIDIA GB10 uses the Blackwell 2.0 architecture on the GB20B chip, also fabricated by TSMC on 5 nm. Both rely on the same foundry and node, but the transistor counts diverge sharply. The MI300A integrates 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4 million per mm². The GB10's transistor count is listed as unknown, but its die size is 382 mm², roughly 37.6 percent of the MI300A's area. This size disparity reflects different design goals: the MI300A is a massive accelerator module, while the GB10 is an integrated graphics processor (IGP) form factor.

Memory architecture is a defining difference. The MI300A packs 128 GB of HBM3 across an 8192-bit bus, producing 5.32 TB/s of bandwidth. The GB10 also has 128 GB of memory, but it uses LPDDR5X on a 256-bit bus, yielding 273.2 GB/s. That is a 19.5 times bandwidth advantage for the MI300A. The memory clock differs as well: the MI300A runs at 1300 MHz with 5.2 Gbps effective, while the GB10 runs at 1067 MHz with 8.5 Gbps effective. The GB10 compensates with a higher per-pin data rate, but the MI300A's massive bus width overwhelms that advantage. For memory-bound workloads, the MI300A's HBM3 stack is in a different league.

Compute resources differ substantially. The MI300A has 14,592 shading units and 912 texture mapping units, with zero ROPs. The GB10 has 6,144 shading units, 384 TMUs, 48 ROPs, 48 ray tracing cores, and 384 tensor cores. The MI300A has no listed RT or tensor core counts, reflecting its CDNA focus on compute rather than graphics or ray tracing. The GB10's inclusion of RT cores and tensor cores, alongside a display output (1x HDMI), indicates a hybrid capability. The MI300A has no display outputs at all. Clock speeds favor the GB10: it runs at a 1665 MHz base and 2418 MHz boost, while the MI300A runs at 1000 MHz base and 2100 MHz boost. The GB10's higher clocks partially offset the MI300A's wider execution resources, but not enough to close the FP32 gap.

Power and physical specifications diverge. The MI300A has a TDP of 750 W and requires a suggested power supply of 1150 W, while the GB10 has a TDP of 140 W and a suggested PSU of 300 W. The MI300A is an OAM module, while the GB10 is an IGP. The GB10 has physical dimensions of 150 mm in length, 51 mm in height, and 150 mm in width, while the MI300A's dimensions are not recorded. Both use a PCIe 5.0 x16 bus interface, and neither uses external power connectors in the recorded data. The MI300A's API support is listed as N/A for DirectX, OpenGL, and Vulkan, as is the GB10's, though the GB10 has a display output.

FAQ

Q: Why does the AMD Instinct MI300A have no benchmark scores in the database?

A: The database lists no recorded benchmarks for the MI300A, giving it an average benchmark score of zero and a percentile ranking of 50. The NVIDIA GB10, in contrast, has two recorded tests: Geekbench OpenCL at 120,137 and Geekbench Vulkan at 114,648, with an average of 117,393 and a 95th percentile ranking.

Q: How does the memory bandwidth of the MI300A compare to the GB10?

A: The MI300A has 5.32 TB/s of bandwidth from 128 GB of HBM3 on an 8192-bit bus. The GB10 has 273.2 GB/s from 128 GB of LPDDR5X on a 256-bit bus. The MI300A's bandwidth is 19.5 times higher.

Q: What is the FP32 compute difference between the two parts?

A: The MI300A delivers 61.29 TFLOPS of FP32 compute, while the GB10 delivers 29.71 TFLOPS. The MI300A is 2.06 times faster in this metric. The GB10 also lists FP16 at 29.71 TFLOPS with a 1:1 ratio, while the MI300A has no listed FP16 figure.

Q: Which part has a higher boost clock?

A: The NVIDIA GB10 boosts to 2418 MHz, while the AMD MI300A boosts to 2100 MHz. The GB10 also has a higher base clock at 1665 MHz versus 1000 MHz for the MI300A.

Q: How do the nearest rivals rank relative to the GB10?

A: The GB10 trails the AMD Radeon PRO W7700 by 1.3 percent (that card averages 118,976 points). It leads the NVIDIA RTX 4000 SFF Ada Generation by 0.3 percent (117,088 points), the NVIDIA Tesla V100 SXM2 16 GB by 2.6 percent (114,395 points), and the NVIDIA RTX A5500 Mobile by 3 percent (113,944 points).

Q: What are the physical form factor differences?

A: The MI300A is an OAM module with no display outputs and no recorded dimensions. The GB10 is an IGP with dimensions of 150 mm length, 51 mm height, and 150 mm width, and it includes one HDMI output.

The Verdict

The data indicates two accelerators with very different intended roles. The AMD Instinct MI300A is a high-power, high-bandwidth compute accelerator. Its 750 W TDP, 5.32 TB/s memory bandwidth, and 61.29 TFLOPS of FP32 performance place it in a class suited for large-scale compute workloads, particularly those that saturate memory bandwidth or require massive FP32 throughput. Its lack of display outputs, ROPs, and graphics APIs reinforces this focus on computation rather than rendering.

The NVIDIA GB10 is a lower-power, more versatile part. Its 140 W TDP and 300 W suggested PSU make it far more accessible in terms of system integration. Its 29.71 TFLOPS of FP32 and FP16 performance, combined with 48 RT cores, 384 tensor cores, and a display output, suggest a broader capability set. The GB10's benchmark scores place it in the 95th percentile, narrowly ahead of or behind a small cluster of professional GPUs. It is not a performance leader in the database, but it delivers a balanced feature set at a fraction of the power draw.

For compute-bound applications where raw FP32 throughput and memory bandwidth are paramount, the MI300A's specifications indicate a decisive advantage. The 2.06 times FP32 lead and the 19.5 times bandwidth lead are not trivial margins. For systems requiring lower power, a display output, or tensor and RT acceleration, the GB10 is the only one of the two with those capabilities in the recorded data. The MI300A has no benchmark results, so its real-world standing cannot be confirmed, but the specification deltas are substantial enough to define distinct use cases.

Specification Differences

| Field | AMD Instinct MI300A | NVIDIA GB10 |

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

| Architecture | CDNA 3.0 | Blackwell 2.0 |

| Chip | Aqua Vanjaram | GB20B |

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

| Process node | 5 nm | 5 nm |

| Foundry | TSMC | TSMC |

| Transistors | 153,000 million | unknown |

| Die size | 1017 mm² | 382 mm² |

| Transistor density | 150.4M / mm² | null |

| Base clock | 1000 MHz | 1665 MHz |

| Boost clock | 2100 MHz | 2418 MHz |

| Memory clock | 1300 MHz, 5.2 Gbps effective | 1067 MHz, 8.5 Gbps effective |

| Memory size | 128 GB | 128 GB |

| Memory type | HBM3 | LPDDR5X |

| Memory bus width | 8192 bit | 256 bit |

| Memory bandwidth | 5.32 TB/s | 273.2 GB/s |

| Shading units | 14592 | 6144 |

| TMUs | 912 | 384 |

| ROPs | 0 | 48 |

| RT cores | null | 48 |

| Tensor cores | null | 384 |

| Pixel rate | 0 MPixel/s | 116.1 GPixel/s |

| Texture rate | 1,915.2 GTexel/s | 928.5 GTexel/s |

| FP32 | 61.29 TFLOPS | 29.71 TFLOPS |

| FP16 | null | 29.71 TFLOPS (1:1) |

| TDP | 750 W | 140 W |

| Slot width | OAM Module | IGP |

| Suggested PSU | 1150 W | 300 W |

| Display outputs | No outputs | 1x HDMI |

| Dimensions | null | 150 mm length, 51 mm height, 150 mm width |

| Release date | 2023-12-05 | 2025-10-14 |

| Predecessor | Radeon Instinct | Server Hopper |

| Successor | null | Server Rubin |

| Launch MSRP | null | 3,999 USD |

| Percentile vs all GPUs | 50 | 95 |

| Average benchmark score | 0 | 117393 |