AMD Instinct MI300 vs NVIDIA RTX PRO 4000 Blackwell Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries for the AMD Instinct MI300 versus the NVIDIA RTX PRO 4000 Blackwell. This absence of overlapping test results means a direct numerical comparison of application performance cannot be constructed from recorded measurements. However, the available data for the NVIDIA card and the architectural specifications for both parts allow for meaningful analysis of their respective capabilities.

The NVIDIA RTX PRO 4000 Blackwell has a complete benchmark profile. Its average benchmark score across all recorded tests is 27,135, placing it in the 72nd percentile of all GPUs in the database. In the 3DMark Steel Nomad DX12 test, it scores 4,648. Its Geekbench Vulkan result is 194,168. PassMark results show a G3D score of 28,427, a GPU compute score of 14,805, a G2D score of 1,265, and DirectX 10, 11, 12, and 9 scores of 173, 276, 97, and 354 respectively.

The AMD Instinct MI300, by contrast, has no benchmark scores recorded in the database. Its percentile rank is listed at 50, with an average benchmark score of zero. This indicates that no validated performance measurements exist for this card in the current database. Consequently, any comparison of actual workload performance between the two cards is impossible based on recorded data alone. The analysis must instead rely on the specification differences and architectural characteristics to infer relative strengths.

The nearest rivals for the NVIDIA RTX PRO 4000 Blackwell provide context for its performance positioning. The AMD Radeon RX 6700 XT has an average score of 27,425, which is 1.1% higher than the RTX PRO 4000 Blackwell. The NVIDIA GeForce RTX 4070 Mobile averages 27,435, also 1.1% higher. The NVIDIA GeForce RTX 3090 averages 27,565, which is 1.6% higher. The NVIDIA RTX A4000 averages 26,683, which is 1.7% lower than the RTX PRO 4000 Blackwell. These deltas indicate that the RTX PRO 4000 Blackwell sits in a tight performance band, within roughly 2% of these established cards.

The recorded data shows that the RTX PRO 4000 Blackwell is a competitive mid-to-high-range workstation card, while the Instinct MI300 is positioned as a compute-oriented accelerator with no validated graphics or compute benchmark results in the database. The MI300's percentile rank of 50, despite having no scores, suggests it is treated as an average performer in the database hierarchy, but this is not supported by any direct measurements.

FAQ

Q: Does the database show any direct benchmark comparison between the AMD Instinct MI300 and the NVIDIA RTX PRO 4000 Blackwell?

A: No. The head-to-head benchmark list is empty, and the AMD Instinct MI300 has no recorded benchmark scores. Only the NVIDIA RTX PRO 4000 Blackwell has test results in the database.

Q: What is the NVIDIA RTX PRO 4000 Blackwell's overall performance standing?

A: Its average benchmark score is 27,135, placing it in the 72nd percentile of all GPUs. It scores 4,648 in 3DMark Steel Nomad DX12 and 194,168 in Geekbench Vulkan.

Q: How does the RTX PRO 4000 Blackwell compare to its nearest rivals?

A: It is 1.1% slower than the AMD Radeon RX 6700 XT and the NVIDIA GeForce RTX 4070 Mobile, 1.6% slower than the NVIDIA GeForce RTX 3090, and 1.7% faster than the NVIDIA RTX A4000.

Q: What is the AMD Instinct MI300's benchmark status?

A: The database lists no benchmarks for the MI300. Its average benchmark score is 0, and its percentile rank is 50, which is a default value rather than a measured result.

Q: Which card has more memory, and what are the respective configurations?

A: The AMD Instinct MI300 has 128 GB of HBM3 memory with an 8192-bit bus and 5.32 TB/s bandwidth. The NVIDIA RTX PRO 4000 Blackwell has 24 GB of GDDR7 memory with a 192-bit bus and 672.0 GB/s bandwidth.

Q: What are the power requirements for each card?

A: The AMD Instinct MI300 has a TDP of 600 W and uses 2x 8-pin power connectors with a suggested power supply of 1000 W. The NVIDIA RTX PRO 4000 Blackwell has a TDP of 140 W, uses 1x 16-pin connector, and requires a 300 W suggested power supply.

The Verdict

Based strictly on the recorded data, the NVIDIA RTX PRO 4000 Blackwell is the only card with validated performance measurements. Its average benchmark score of 27,135 and 72nd percentile ranking demonstrate that it is a functional, competitive workstation GPU. The AMD Instinct MI300 has no benchmark results, so the database cannot confirm any performance capability for it.

For users requiring a card with confirmed graphics and compute performance, the RTX PRO 4000 Blackwell is the data-supported choice. It delivers competitive scores across DirectX 12, Vulkan, and PassMark tests, and its nearest rivals all fall within a 1.6% performance delta. Its 140 W TDP and single-slot design indicate it can operate in a wide range of systems with modest power delivery.

The MI300, with its 600 W TDP, 2x 8-pin connectors, and 1000 W suggested power supply, is clearly designed for a different deployment scenario. Its 128 GB HBM3 memory and 5.32 TB/s bandwidth are massive specifications, but without benchmark scores, the database cannot verify how these translate into real-world results. The card appears oriented toward large-scale compute tasks, but no measured evidence exists to quantify its performance.

The data suggests that the RTX PRO 4000 Blackwell is the safer, verified option for anyone needing a working GPU with known performance characteristics. The MI300 remains an unverified entity in the database, suitable only for those who have external data to justify its selection.

Specification Differences

The two cards differ substantially across nearly every specification field. The AMD Instinct MI300 uses an AMD chip called Aqua Vanjaram, while the NVIDIA RTX PRO 4000 Blackwell uses the GB203 chip. The MI300 has 153,000 million transistors on a 1017 mm² die, resulting in a transistor density of 150.4M per mm². The RTX PRO 4000 Blackwell has 45,600 million transistors on a 378 mm² die, with a density of 120.6M per mm².

Clock speeds differ. The MI300 has a base clock of 1000 MHz and a boost clock of 1700 MHz. The RTX PRO 4000 Blackwell has a base clock of 1230 MHz and a boost clock of 2055 MHz. Memory clocks also differ: the MI300 runs at 1300 MHz with 5.2 Gbps effective, while the RTX PRO 4000 Blackwell runs at 1750 MHz with 28 Gbps effective.

Memory configurations are starkly different. The MI300 has 128 GB of HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth. The RTX PRO 4000 Blackwell has 24 GB of GDDR7 on a 192-bit bus with 672.0 GB/s bandwidth. The MI300 has 14,080 shading units and 880 TMUs, while the RTX PRO 4000 Blackwell has 8,960 shading units and 280 TMUs. The MI300 has 0 ROPs and a pixel rate of 0 MPixel/s, while the RTX PRO 4000 Blackwell has 96 ROPs and a pixel rate of 197.3 GPixel/s.

Texture rates diverge: the MI300 delivers 1,496.0 GTexel/s, while the RTX PRO 4000 Blackwell delivers 575.4 GTexel/s. FP32 compute is 47.87 TFLOPS for the MI300 and 36.83 TFLOPS for the RTX PRO 4000 Blackwell. Both have FP16 at 1:1 ratio with the same TFLOPS values.

Power and physical specs differ. The MI300 has a 600 W TDP, 2x 8-pin connectors, and a 1000 W suggested PSU. The RTX PRO 4000 Blackwell has a 140 W TDP, 1x 16-pin connector, and a 300 W suggested PSU. The RTX PRO 4000 Blackwell is single-slot, while the MI300 has no listed slot width. The MI300 has no display outputs, while the RTX PRO 4000 Blackwell has 4x DisplayPort 2.1b.

Dimensions differ: the MI300 is 267 mm long and 111 mm high, while the RTX PRO 4000 Blackwell is 241 mm long, 111 mm high, and 20 mm wide. The MI300 has no API support listed (DirectX, OpenGL, Vulkan all N/A), while the RTX PRO 4000 Blackwell supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Release dates differ. The MI300 was released on 2023-01-03, while the RTX PRO 4000 Blackwell was released on 2025-03-17. The MI300's predecessor is Radeon Instinct, while the RTX PRO 4000 Blackwell's predecessor is Workstation Ada. The RTX PRO 4000 Blackwell has an active production status, while the MI300's status is not listed.

Architecture Differences

The architectural divide is fundamental. The AMD Instinct MI300 uses CDNA 3.0 architecture, which is a compute-focused design from AMD. The NVIDIA RTX PRO 4000 Blackwell uses Blackwell 2.0 architecture, which is NVIDIA's latest workstation and graphics architecture. Both are fabricated on a 5 nm process at TSMC, but their design philosophies diverge sharply.

The MI300's CDNA 3.0 architecture is built for data center compute workloads. It has no ROPs, no display outputs, and no graphics API support. Its 14,080 shading units are organized for parallel compute rather than rasterization. The absence of pixel rate capability confirms that this is not a graphics card in any traditional sense. Its 128 GB of HBM3 memory with 5.32 TB/s bandwidth is designed for massive datasets that exceed the capacity of typical workstation cards.

The RTX PRO 4000 Blackwell, by contrast, is a full graphics and compute solution. It has 96 ROPs, a pixel rate of 197.3 GPixel/s, and 70 RT cores for ray tracing. Its 280 tensor cores enable AI acceleration. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, making it compatible with standard graphics software. Its 4x DisplayPort 2.1b outputs allow direct display connectivity.

The MI300's texture rate of 1,496.0 GTexel/s is 2.6 times higher than the RTX PRO 4000 Blackwell's 575.4 GTexel/s, but this advantage is irrelevant for a card with no graphics output. The MI300's FP32 compute of 47.87 TFLOPS is 30% higher than the RTX PRO 4000 Blackwell's 36.83 TFLOPS, which could matter for compute workloads if software can utilize the CDNA architecture.

The RTX PRO 4000 Blackwell has 280 tensor cores and 70 RT cores, features the MI300 does not list at all. This indicates that NVIDIA's card is designed for hybrid workloads combining graphics, ray tracing, and AI inference. The MI300's architecture appears specialized for raw compute throughput, with no hybrid feature set.

The transistor counts reflect different design approaches. The MI300 uses 153,000 million transistors on a 1017 mm² die, a massive chip with high density. The RTX PRO 4000 Blackwell uses 45,600 million transistors on a 378 mm² die, a smaller and more efficient chip. The MI300's much larger die and transistor count suggest a design prioritizing peak compute, while the RTX PRO 4000 Blackwell's smaller die prioritizes power efficiency and integration.

Where Each One Wins

Based on the recorded data, the NVIDIA RTX PRO 4000 Blackwell wins in every measurable category. It has confirmed benchmark scores across multiple tests, including 4,648 in 3DMark Steel Nomad DX12, 194,168 in Geekbench Vulkan, and 28,427 in PassMark G3D. It supports modern graphics APIs and has display outputs. Its 140 W TDP makes it feasible for standard workstation environments.

The AMD Instinct MI300 wins only in theoretical specifications. Its 128 GB memory capacity, 5.32 TB/s bandwidth, and 47.87 TFLOPS FP32 are all higher than the RTX PRO 4000 Blackwell's corresponding figures. Its texture rate of 1,496.0 GTexel/s is also higher. However, the database contains no measurements confirming these specifications translate into actual performance advantages.

In compute-heavy scenarios where memory capacity is the limiting factor, the MI300's 128 GB HBM3 could be advantageous. The RTX PRO 4000 Blackwell's 24 GB GDDR7 is sufficient for many tasks but will hit capacity limits sooner when processing large datasets. The MI300's 8,192-bit memory bus provides a bandwidth advantage that could accelerate memory-bound workloads.

In graphics and rendering workloads, the RTX PRO 4000 Blackwell is the clear winner by data. Its pixel rate of 197.3 GPixel/s, 96 ROPs, and 70 RT cores enable actual rendering capability. The MI300 has no pixel rate and no RT cores, making it incapable of graphics tasks.

In power-constrained environments, the RTX PRO 4000 Blackwell wins decisively. Its 140 W TDP is 460 W lower than the MI300's 600 W TDP. The suggested PSU of 300 W versus 1000 W further demonstrates the RTX PRO 4000 Blackwell's suitability for standard desktop and workstation systems.

In software compatibility, the RTX PRO 4000 Blackwell wins. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI300 lists no API support. This means the RTX PRO 4000 Blackwell can run standard graphics software, while the MI300 requires specialized compute stacks.

The data indicates that the RTX PRO 4000 Blackwell is the versatile, verified option for graphics, rendering, and general compute. The MI300 is a specialized compute accelerator with unverified performance, suited only for scenarios where its massive memory capacity and bandwidth are essential, and where its lack of graphics capability is acceptable.