AMD Instinct MI300X vs NVIDIA RTX PRO 5000 Blackwell Comparison

AMD Instinct MI300X and NVIDIA RTX PRO 5000 Blackwell target entirely different corners of the professional GPU market, and the benchmark data reflects that split. The MI300X is a data-center accelerator with a massive memory pool, while the RTX PRO 5000 is a workstation card with display outputs and a conventional dual-slot design. In the only shared benchmark, Geekbench OpenCL, the AMD part leads by a substantial margin, but the NVIDIA card’s architectural feature set tells a more complex story.

Head-to-Head Benchmarks

The single direct comparison available is Geekbench OpenCL, where the AMD Instinct MI300X scores 317994 against the NVIDIA RTX PRO 5000 Blackwell’s 254116. That is a 25.1% advantage for AMD, a decisive win in raw compute throughput. The MI300X’s score places it in the 100th percentile of all GPUs, while the RTX PRO 5000 sits at the 98th percentile — both are elite performers, but AMD holds the top spot. The delta is consistent with the underlying specifications: the MI300X delivers 81.72 TFLOPS of FP32 compute versus 66.94 TFLOPS for the RTX PRO 5000, a 22% gap that roughly matches the benchmark difference.

Looking at the nearest rivals for each card provides context. The MI300X’s closest competitors are other NVIDIA data-center parts: the B200 scores 345482 (8% higher), the H200 NVL scores 334891 (5% higher), while the L40S trails at 295763 (7.5% lower) and the RTX 6000 Ada Generation sits at 287237 (10.7% lower). The MI300X is clearly positioned in the upper tier of compute accelerators, beating several high-end NVIDIA offerings but losing to the flagship B200. For the RTX PRO 5000, its nearest rivals are older NVIDIA professional and consumer cards: the A100 SXM4 80 GB scores 183725 (0.9% lower), the RTX 5000 Ada Generation scores 184664 (1.4% lower), the GeForce RTX 4090 D scores 178050 (2.3% higher), and the A100 SXM4 40 GB scores 187147 (2.7% lower). This shows the RTX PRO 5000 is roughly on par with the A100 series in OpenCL, despite being a newer architecture.

It is importantly the RTX PRO 5000 has two additional benchmarks in its profile — 3DMark Steel Nomad DX12 and Geekbench Vulkan — but the MI300X has no equivalent scores, so no cross-comparison is possible. The 3DMark score of 9579.5 and Vulkan score of 282631 indicate the NVIDIA card handles graphics APIs, something the AMD part cannot do at all, as it has no display outputs and lists DirectX, OpenGL, and Vulkan as N/A.

Where Each One Wins

The AMD Instinct MI300X wins decisively in raw compute and memory capacity. Its 192 GB of HBM3 memory with 5.32 TB/s bandwidth dwarfs the RTX PRO 5000’s 48 GB of GDDR7 at 1.34 TB/s — a 4x capacity and 4x bandwidth advantage. For workloads that fit in memory, like large language model inference or scientific simulation, the MI300X is the clear choice. Its FP32 and FP16 performance of 81.72 TFLOPS each (1:1 ratio) outpaces the RTX PRO 5000’s 66.94 TFLOPS, and the texture rate of 2,553.6 GTexel/s is more than double the NVIDIA card’s 1,045.9 GTexel/s.

The NVIDIA RTX PRO 5000 wins in every category related to graphics and workstation usability. It has 110 RT cores and 440 tensor cores, enabling ray tracing and AI acceleration that the MI300X lacks entirely. The pixel rate of 380.3 GPixel/s and 160 ROPs mean it can drive displays, and the 4x DisplayPort 2.1b outputs confirm that capability. The MI300X has zero ROPs and a pixel rate of 0 MPixel/s, making it useless for any visual output. The RTX PRO 5000 also supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI300X supports none of these APIs. For any task requiring real-time rendering, CAD visualization, or GPU-accelerated graphics, the NVIDIA card is the only functional option.

Architecture Differences

The MI300X uses AMD’s CDNA 3.0 architecture on the Aqua Vanjaram chip, built on a 5 nm TSMC process. It packs 153,000 million transistors on a 1017 mm² die, yielding a density of 150.4 million transistors per mm². This is a compute-focused design with no graphics pipeline — no ROPs, no RT cores, no tensor cores in the traditional sense, and no display outputs. The memory subsystem is HBM3 with an 8192-bit bus, which explains the enormous 5.32 TB/s bandwidth. The card consumes 750 W and requires a 1150 W suggested power supply, mounted as an OAM module with no power connectors of its own.

The RTX PRO 5000 uses NVIDIA’s Blackwell 2.0 architecture on the GB202 chip, also on a 5 nm TSMC process. It has 92,200 million transistors on a 750 mm² die, with a lower density of 122.9 million transistors per mm². This is a full-featured GPU with 14,080 shading units, 440 TMUs, 160 ROPs, 110 RT cores, and 440 tensor cores. The memory is GDDR7 on a 384-bit bus, providing 1.34 TB/s bandwidth. The card runs at a 300 W TDP with a 700 W suggested PSU, uses a single 16-pin power connector, and fits in a dual-slot form factor measuring 267 mm long, 111 mm tall, and 40 mm wide. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and has 4x DisplayPort 2.1b outputs.

The clock speeds tell a similar story. The MI300X has a base clock of 1000 MHz and boost of 2100 MHz, while the RTX PRO 5000 starts at 1740 MHz base and boosts to 2377 MHz. The NVIDIA card’s higher clocks reflect its smaller, more efficient design, but the AMD part compensates with far more shading units (19,456 vs 14,080) and TMUs (1,216 vs 440). The MI300X’s memory runs at 1300 MHz (5.2 Gbps effective), while the RTX PRO 5000’s GDDR7 runs at 1750 MHz (28 Gbps effective) — the newer memory type achieves higher per-pin speeds, but the AMD card’s massive bus width wins overall bandwidth.

Specification Differences

| Specification | AMD Instinct MI300X | NVIDIA RTX PRO 5000 Blackwell |

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

| Transistors | 153,000 million | 92,200 million |

| Die Size | 1017 mm² | 750 mm² |

| Base Clock | 1000 MHz | 1740 MHz |

| Boost Clock | 2100 MHz | 2377 MHz |

| Memory Size | 192 GB HBM3 | 48 GB GDDR7 |

| Memory Bus | 8192 bit | 384 bit |

| Memory Bandwidth | 5.32 TB/s | 1.34 TB/s |

| Shading Units | 19,456 | 14,080 |

| TMUs | 1,216 | 440 |

| ROPs | 0 | 160 |

| RT Cores | N/A | 110 |

| Tensor Cores | N/A | 440 |

| FP32 | 81.72 TFLOPS | 66.94 TFLOPS |

| Texture Rate | 2,553.6 GTexel/s | 1,045.9 GTexel/s |

| TDP | 750 W | 300 W |

| Suggested PSU | 1150 W | 700 W |

| Slot Width | OAM Module | Dual-slot |

| Power Connectors | None | 1x 16-pin |

| Display Outputs | No outputs | 4x DisplayPort 2.1b |

| DirectX | N/A | 12 Ultimate (12_2) |

| Release Date | 2023-12-05 | 2025-03-17 |

FAQ

Q: Which card has more raw compute power?

A: The AMD Instinct MI300X leads in FP32 and FP16 performance with 81.72 TFLOPS each, versus 66.94 TFLOPS for the NVIDIA RTX PRO 5000 Blackwell. This is reflected in the Geekbench OpenCL score of 317994 vs 254116, a 25.1% advantage for AMD.

Q: Can the AMD card output video to a display?

A: No. The MI300X has no display outputs and lists DirectX, OpenGL, and Vulkan as N/A. The RTX PRO 5000 has 4x DisplayPort 2.1b outputs and supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Q: How do the memory capacities compare?

A: The MI300X has 192 GB of HBM3 with 5.32 TB/s bandwidth on an 8192-bit bus. The RTX PRO 5000 has 48 GB of GDDR7 with 1.34 TB/s bandwidth on a 384-bit bus. AMD offers 4x the capacity and 4x the bandwidth.

Q: What is the power requirement difference?

A: The MI300X has a 750 W TDP and requires a 1150 W suggested power supply, while the RTX PRO 5000 has a 300 W TDP and needs a 700 W suggested PSU. The AMD card is mounted as an OAM module with no power connectors, while the NVIDIA card uses a single 16-pin connector.

Q: Which card supports ray tracing?

A: Only the NVIDIA RTX PRO 5000 supports ray tracing, with 110 RT cores. The AMD MI300X has no RT cores listed. The NVIDIA card also has 440 tensor cores for AI acceleration, which the AMD card lacks.

Q: How do their release dates differ?

A: The AMD Instinct MI300X was released on 2023-12-05, while the NVIDIA RTX PRO 5000 Blackwell launched later on 2025-03-17. The NVIDIA card is marked as "Active" in production status, while the AMD card has no production status listed.

The Verdict

The data presents a clear bifurcation. The AMD Instinct MI300X is the superior choice for pure compute workloads that demand massive memory capacity and bandwidth. Its 192 GB HBM3 pool and 5.32 TB/s bandwidth are unmatched in this comparison, and its 25.1% lead in Geekbench OpenCL over the RTX PRO 5000 confirms its compute dominance. The 100th percentile ranking and victory over the L40S and RTX 6000 Ada Generation in its rival group solidify its position as a top-tier accelerator. Anyone running large-scale AI training, inference, or scientific simulations that fit within 192 GB should choose the MI300X without hesitation.

The NVIDIA RTX PRO 5000 Blackwell is the only viable option for workstation graphics. Its 110 RT cores, 440 tensor cores, 160 ROPs, and 4x DisplayPort 2.1b outputs make it a fully featured GPU for rendering, visualization, and any task requiring a display. The support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 means it works with standard graphics software, while the MI300X cannot output any video signal. Its 300 W TDP and dual-slot design make it practical for a desktop workstation, whereas the MI300X requires an OAM module setup with a 1150 W PSU. The RTX PRO 5000’s launch MSRP is 5,099 USD.

In short, the MI300X is a compute monster for servers, and the RTX PRO 5000 is a professional graphics card for desktops. They are not direct competitors; they serve different use cases. Choose AMD if your bottleneck is memory capacity or raw FP32 throughput, and choose NVIDIA if you need graphics output, ray tracing, or a conventional workstation form factor. The benchmark data shows AMD wins the compute race, but NVIDIA wins the versatility race.