AMD Instinct MI300 vs NVIDIA RTX PRO 4000 Blackwell SFF Comparison

Head-to-Head Benchmarks

The recorded data for this comparison is asymmetrical. The AMD Instinct MI300 has no benchmark scores in the database, while the NVIDIA RTX PRO 4000 Blackwell SFF has a single recorded measurement. This limits direct head-to-head numerical comparison to the NVIDIA side only, with the AMD card's performance assessed through its architectural specifications and overall percentile placement.

The NVIDIA RTX PRO 4000 Blackwell SFF delivers a score of 2910 in the 3DMark Steel Nomad DX12 test. This places it at the 19th percentile among all GPUs in the database. The nearest rivals bracket this score tightly. The NVIDIA GeForce RTX 4060 Ti 16 GB scores 2907, which is 0.1% behind the RTX PRO 4000. The NVIDIA GeForce RTX 4060 Ti 8 GB scores 2913, which is 0.1% ahead. The NVIDIA Quadro P600 scores 2923, leading by 0.4%, while the NVIDIA GeForce RTX 4010 scores 2893, trailing by 0.6%. The RTX PRO 4000 sits essentially in the middle of this cluster, with all four rivals within a margin of less than one percent. This indicates that in this specific DX12 workload, the RTX PRO 4000 performs almost identically to a mainstream GeForce RTX 4060 Ti, despite its professional workstation positioning.

The AMD Instinct MI300 has an average benchmark score of zero and no recorded wins in the head-to-head comparisons. Its percentile rank is 50, which is higher than the RTX PRO 4000's 19th percentile, but this percentile is derived from its specification profile rather than measured performance data. Without a Steel Nomad score, no direct numerical delta can be established between the two cards. The data shows that the MI300's theoretical compute output, based on its FP32 rate of 47.87 TFLOPS, is roughly double the RTX PRO 4000's 24.05 TFLOPS. However, benchmark results for the MI300 are entirely absent, so the practical performance gap remains unquantified in the database.

Where Each One Wins

The benchmark wins are entirely on the NVIDIA side, as the AMD card has no recorded victories. The RTX PRO 4000 Blackwell SFF wins the only available benchmark, the 3DMark Steel Nomad DX12 test, with a score of 2910. This is its sole data point, and it demonstrates that the card can handle a modern DirectX 12 workload at a level comparable to the GeForce RTX 4060 Ti family.

For the AMD Instinct MI300, the wins are structural rather than measured. Its FP32 compute of 47.87 TFLOPS and FP16 compute of 47.87 TFLOPS (1:1 ratio) indicate a raw compute advantage that would likely manifest in FP32-heavy or FP16-heavy workloads, such as scientific simulation or machine learning training. The MI300 also has a massive memory subsystem with 128 GB of HBM3 and 5.32 TB/s of bandwidth, which is over 12 times the bandwidth of the RTX PRO 4000's 432.0 GB/s. This memory capacity and bandwidth advantage would dominate in workloads that require large datasets resident on the card, such as large language model inference or high-resolution volume rendering. However, the database contains no benchmark evidence for these scenarios.

The RTX PRO 4000 wins in rasterization-oriented tasks. It has 96 ROPs and a pixel rate of 128.8 GPixel/s, while the MI300 has 0 ROPs and a pixel rate of 0 MPixel/s. The NVIDIA card also has 70 RT cores and 280 tensor cores, whereas the MI300 lists no RT cores or tensor cores in the data. This makes the RTX PRO 4000 the only one of the two with any graphics pipeline capability for real-time rendering or ray tracing. The MI300's texture rate of 1,496.0 GTexel/s is far higher than the RTX PRO 4000's 375.8 GTexel/s, but without ROPs, that texture throughput cannot be converted to displayed pixels.

Architecture Differences

The two cards represent fundamentally different design philosophies. The AMD Instinct MI300 uses the CDNA 3.0 architecture on the Aqua Vanjaram chip, which is a compute-focused design with no display outputs and no graphics API support (DirectX, OpenGL, and Vulkan are all listed as N/A). It is built on a 5 nm process at TSMC, with 153,000 million transistors on a 1017 mm² die. The transistor density is 150.4 million per mm². This is a massive chip designed for data center compute, not client graphics.

The NVIDIA RTX PRO 4000 Blackwell SFF uses the Blackwell 2.0 architecture on the GB203 chip, built on the same 5 nm process at TSMC. It has 45,600 million transistors on a 378 mm² die, with a transistor density of 120.6 million per mm². The GB203 is a much smaller chip, less than half the area of the MI300, with roughly a third of the transistor count. The MI300's higher transistor density suggests a more aggressive use of the 5 nm node, likely due to the HBM3 memory controllers and the compute-heavy CDNA 3.0 layout.

The MI300 uses HBM3 memory across an 8192-bit bus, giving 5.32 TB/s bandwidth. The RTX PRO 4000 uses GDDR7 across a 192-bit bus, giving 432.0 GB/s. The memory clock difference is notable: the MI300 runs at 1300 MHz (5.2 Gbps effective), while the RTX PRO 4000 runs at 1125 MHz (18 Gbps effective). The GDDR7 standard achieves much higher per-pin data rates, but the MI300's extremely wide bus compensates with total bandwidth.

The MI300 has 14,080 shading units and 880 TMUs, while the RTX PRO 4000 has 8,960 shading units and 280 TMUs. The MI300 has no ROPs, RT cores, or tensor cores listed, which confirms its non-rendering role. The RTX PRO 4000 has 96 ROPs, 70 RT cores, and 280 tensor cores. The MI300's FP32 and FP16 rates are both 47.87 TFLOPS, indicating a 1:1 ratio, which is typical for CDNA compute cards. The RTX PRO 4000 also has a 1:1 FP32 to FP16 ratio at 24.05 TFLOPS each.

Specification Differences

The key specification differences between the two cards are substantial and define their use cases. The AMD Instinct MI300 has a base clock of 1000 MHz and a boost clock of 1700 MHz. The NVIDIA RTX PRO 4000 has a base clock of 405 MHz and a boost clock of 1342 MHz. The MI300's boost clock is notably higher, but it also consumes far more power. The MI300 has a TDP of 600 W with a suggested PSU of 1000 W and requires 2x 8-pin power connectors. The RTX PRO 4000 has a TDP of 70 W with a suggested PSU of 250 W and requires no power connectors at all, drawing power solely from the PCIe slot.

The MI300 is a dual-slot card (slot width not listed) with dimensions of 267 mm length and 111 mm height. The RTX PRO 4000 is explicitly Dual-slot with dimensions of 167 mm length, 69 mm height, and 40 mm width. The NVIDIA card is significantly shorter and lower-profile, fitting in small form factor (SFF) chassis. The MI300 is a full-length data center card.

The MI300 uses a PCIe 5.0 x16 interface, while the RTX PRO 4000 uses PCIe 5.0 x8. The MI300 has no display outputs, while the RTX PRO 4000 has 4x mini-DisplayPort 2.1b. The MI300 supports no graphics APIs, while the RTX PRO 4000 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RTX PRO 4000 is listed as Active in production status, with a release date of 2025-08-10, while the MI300's production status is null and its release date is 2023-01-03. The MI300's predecessor is Radeon Instinct, and the RTX PRO 4000's predecessor is Workstation Ada.

FAQ

Q: Which card has higher FP32 compute performance?

A: The AMD Instinct MI300 has an FP32 rate of 47.87 TFLOPS, which is exactly double the RTX PRO 4000's 24.05 TFLOPS. Both cards have a 1:1 FP32 to FP16 ratio.

Q: What is the memory capacity difference?

A: The MI300 has 128 GB of HBM3, while the RTX PRO 4000 has 24 GB of GDDR7. The MI300 also has a bus width of 8192 bit versus 192 bit, resulting in 5.32 TB/s bandwidth versus 432.0 GB/s.

Q: Can either card be used for gaming or display output?

A: No. The MI300 has no display outputs and no graphics API support. The RTX PRO 4000 has 4x mini-DisplayPort 2.1b and supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, so it can drive displays, but it is a workstation card.

Q: Which card has a lower power requirement?

A: The RTX PRO 4000 has a TDP of 70 W and a suggested PSU of 250 W, requiring no power connectors. The MI300 has a TDP of 600 W and a suggested PSU of 1000 W, requiring 2x 8-pin connectors.

Q: What are the physical size differences?

A: The MI300 is 267 mm long and 111 mm tall. The RTX PRO 4000 is 167 mm long, 69 mm tall, and 40 mm wide, making it suitable for small form factor builds.

Q: How does the RTX PRO 4000 compare to its nearest rivals in the only benchmark?

A: In 3DMark Steel Nomad DX12, the RTX PRO 4000 scores 2910. The GeForce RTX 4060 Ti 16 GB scores 2907 (0.1% behind), the RTX 4060 Ti 8 GB scores 2913 (0.1% ahead), the Quadro P600 scores 2923 (0.4% ahead), and the GeForce RTX 4010 scores 2893 (0.6% behind).

The Verdict

The data presents a clear split. The AMD Instinct MI300 is a compute accelerator with no graphics capabilities. Its 47.87 TFLOPS FP32, 128 GB HBM3, and 5.32 TB/s bandwidth are designed for data center workloads that need massive memory and raw throughput. Its 50th percentile placement among all GPUs reflects its specification strength, but the complete absence of benchmark scores means its real-world performance is unverified in the database. The 600 W TDP and 1000 W suggested PSU make it a server-class component.

The NVIDIA RTX PRO 4000 Blackwell SFF is a workstation graphics card with a measured benchmark result. Its 2910 score in Steel Nomad places it in the same performance tier as the GeForce RTX 4060 Ti family, with deltas under 1%. Its 70 W TDP, no power connectors, and 167 mm length make it easy to install in small form factor workstations. It has display outputs and full graphics API support, enabling rendering and professional visualization.

Users who need pure compute throughput and large memory capacity for scientific or AI workloads should select the MI300, based on its specification sheet. Users who need a compact, low-power card with actual graphics output, ray tracing capability, and measured DirectX 12 performance should select the RTX PRO 4000. The two cards do not compete in the same market segment; the MI300 is a compute accelerator, and the RTX PRO 4000 is a workstation graphics card with a known benchmark footprint.