AMD Instinct MI300A vs NVIDIA RTX PRO 6000 Blackwell Comparison

Where Each One Wins

The AMD Instinct MI300A and NVIDIA RTX PRO 6000 Blackwell occupy different corners of the accelerator landscape, and the recorded data reflects that split clearly. The MI300A is built around CDNA 3.0 architecture on the Aqua Vanjaram chip, a 5 nm design with 153,000 million transistors on a 1017 mm² die. It uses HBM3 memory totaling 128 GB across an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RTX PRO 6000 Blackwell, by contrast, is a Blackwell 2.0 part using the GB202 chip, with 92,200 million transistors on a 750 mm² die, 96 GB of GDDR7 on a 512-bit bus, and 1.79 TB/s of bandwidth.

The MI300A wins on capacity and bandwidth. Its 128 GB frame buffer is 33% larger than the RTX PRO 6000's 96 GB, and its 5.32 TB/s memory bandwidth is nearly three times the NVIDIA card's 1.79 TB/s. That combination points to workloads where large datasets must stay resident on the accelerator, or where memory throughput dominates execution time. The MI300A also carries a much higher transistor count, 153,000 million versus 92,200 million, which reflects a denser 150.4M transistors per mm² versus 122.9M.

The RTX PRO 6000 Blackwell wins on raw compute throughput and feature completeness. Its FP32 performance is 126.0 TFLOPS, more than double the MI300A's 61.29 TFLOPS. It also delivers FP16 at 126.0 TFLOPS with a 1:1 ratio, a detail absent from the MI300A's record. The NVIDIA card includes 188 ray tracing cores and 752 tensor cores, while the MI300A lists no RT or tensor core counts at all. Pixel and texture rates favor the NVIDIA part as well: 502.5 GPixel/s versus 0 MPixel/s, and 1,968.0 GTexel/s versus 1,915.2 GTexel/s, a narrow but measurable lead.

The RTX PRO 6000 also provides display outputs, specifically 4x DisplayPort 2.1b, while the MI300A has no display outputs. The NVIDIA card is a dual-slot design with a 16-pin power connector, whereas the MI300A is an OAM Module with no power connectors listed. The API support differs sharply: the RTX PRO 6000 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI300A lists N/A for all three. The MI300A is a compute accelerator with no graphics pipeline, while the RTX PRO 6000 is a full workstation GPU.

Power consumption also differs. The MI300A has a TDP of 750 W and suggests an 1150 W power supply, while the RTX PRO 6000 draws 600 W and suggests a 1000 W unit. The MI300A uses 150 W more at the board level, a gap that matters in systems with strict power budgets.

The Verdict

The data directs each product toward a distinct audience. The MI300A is for compute-centric deployments where memory size and bandwidth are the limiting factors. Its 128 GB HBM3 pool and 5.32 TB/s bandwidth give it an advantage in data-intensive workloads that cannot fit into a 96 GB frame buffer. The absence of display outputs, graphics APIs, and RT or tensor core listings reinforces that this is not a workstation graphics card. It is a server accelerator, and the OAM Module form factor plus lack of power connectors confirms that it belongs in a chassis designed for it, not a desktop.

The RTX PRO 6000 Blackwell is the workstation part. It offers the highest FP32 throughput in this comparison at 126.0 TFLOPS, includes ray tracing and tensor hardware, supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and drives four DisplayPort 2.1b outputs. Its 96 GB GDDR7 frame buffer is smaller than the MI300A's, but it is still a large pool for graphics and rendering workloads. The dual-slot form factor, 304 mm length, and single 16-pin power connector make it installable in a conventional workstation chassis.

Benchmark data from the database places the RTX PRO 6000 at the 59th percentile among all GPUs, with an average score of 16,408 in the 3DMark Steel Nomad DX12 test. The MI300A has no recorded benchmark scores and sits at the 50th percentile with an average score of zero. The nearest rivals to the RTX PRO 6000 in the database are the AMD Radeon PRO W7500 at 16,415, the AMD Radeon RX 5700 XT at 16,361, the AMD Radeon Pro 5600M at 16,351, and the NVIDIA GeForce RTX 5090 D V2 at 16,504. The RTX PRO 6000 trails the RTX 5090 D V2 by 0.6% and leads the RX 5700 XT by 0.3% and the Pro 5600M by 0.4%, while matching the PRO W7500 within rounding. These are tightly clustered scores, indicating that in this specific DX12 workload, the RTX PRO 6000 performs near the level of several very different cards.

The MI300A's lack of any recorded benchmark results means no direct performance comparison is possible from the database. Its 50th percentile rank and zero average score reflect that absence of data, not a measured performance level. The verdict, therefore, rests on architecture and specifications: the MI300A is the memory-capacity and bandwidth leader, and the RTX PRO 6000 is the compute and graphics feature leader.

Head-to-Head Benchmarks

There are no recorded head-to-head benchmark results between the MI300A and the RTX PRO 6000 in the database. The winsA and winsB fields are both zero, and the headToHeadBenchmarks array is empty. The comparison must be drawn from the individual specifications and the single benchmark entry for the RTX PRO 6000.

The largest win for the MI300A is memory bandwidth. Its 5.32 TB/s is 197% higher than the RTX PRO 6000's 1.79 TB/s. Memory capacity also favors the AMD part: 128 GB versus 96 GB, a 33% advantage. Transistor count is another clear win at 153,000 million versus 92,200 million, and the die is larger at 1017 mm² versus 750 mm². The MI300A's texture rate of 1,915.2 GTexel/s is close to the RTX PRO 6000's 1,968.0 GTexel/s, a 2.8% gap, but the MI300A records zero pixel rate while the NVIDIA card achieves 502.5 GPixel/s.

The RTX PRO 6000's biggest win is FP32 compute. At 126.0 TFLOPS, it is 105.6% higher than the MI300A's 61.29 TFLOPS. Clock speeds also favor the NVIDIA card: its base clock is 1590 MHz versus 1000 MHz, and its boost clock is 2617 MHz versus 2100 MHz. The RTX PRO 6000 has more shading units at 24,064 versus 14,592, but the MI300A has more texture mapping units at 912 versus 752. The NVIDIA card has 192 ROPs while the MI300A has zero, a decisive difference for rasterization work. Memory clock rates reflect the different memory types: the RTX PRO 6000 runs its GDDR7 at 1750 MHz with 28 Gbps effective, while the MI300A runs HBM3 at 1300 MHz with 5.2 Gbps effective.

In the one recorded benchmark, the RTX PRO 6000 scores 16,408 in 3DMark Steel Nomad DX12. Its nearest rival, the AMD Radeon PRO W7500, scores 16,415, a delta of 0%. The AMD Radeon RX 5700 XT scores 16,361, 0.3% behind. The AMD Radeon Pro 5600M scores 16,351, 0.4% behind. The NVIDIA GeForce RTX 5090 D V2 scores 16,504, which is 0.6% ahead. The RTX PRO 6000's percentile rank of 59 places it above the median but not among the top performers in the full GPU database.

FAQ

Q: Which GPU has more memory bandwidth?

A: The AMD Instinct MI300A. It delivers 5.32 TB/s from 128 GB of HBM3 on an 8192-bit bus, while the NVIDIA RTX PRO 6000 Blackwell provides 1.79 TB/s from 96 GB of GDDR7 on a 512-bit bus.

Q: Which card has higher FP32 compute performance?

A: The NVIDIA RTX PRO 6000 Blackwell. Its FP32 rating is 126.0 TFLOPS, while the AMD Instinct MI300A is rated at 61.29 TFLOPS.

Q: Does the AMD Instinct MI300A support display outputs?

A: No. The MI300A lists no display outputs and records N/A for DirectX, OpenGL, and Vulkan support. The NVIDIA RTX PRO 6000 Blackwell provides 4x DisplayPort 2.1b outputs and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What is the power draw of each card?

A: The AMD Instinct MI300A has a TDP of 750 W with a suggested power supply of 1150 W. The NVIDIA RTX PRO 6000 Blackwell has a TDP of 600 W with a suggested power supply of 1000 W.

Q: How did the RTX PRO 6000 perform in the database's DX12 benchmark?

A: It scored 16,408 in 3DMark Steel Nomad DX12, placing it at the 59th percentile among all GPUs. The nearest rival, the AMD Radeon PRO W7500, scored 16,415, a 0% delta, while the NVIDIA GeForce RTX 5090 D V2 scored 16,504, 0.6% ahead.

Q: Which card has more memory capacity?

A: The AMD Instinct MI300A, with 128 GB of HBM3. The NVIDIA RTX PRO 6000 Blackwell has 96 GB of GDDR7.

Architecture Differences

The two accelerators are built on different architectures, chips, and memory technologies. The MI300A uses CDNA 3.0 architecture on the Aqua Vanjaram chip, manufactured on a 5 nm process at TSMC. The RTX PRO 6000 uses Blackwell 2.0 architecture on the GB202 chip, also on a 5 nm process at TSMC. Both are TSMC 5 nm parts, but the transistor counts diverge: the MI300A packs 153,000 million transistors onto a 1017 mm² die for a density of 150.4M transistors per mm². The RTX PRO 6000 has 92,200 million transistors on a 750 mm² die, a density of 122.9M per mm².

Memory architecture is the starkest difference. The MI300A uses HBM3 with 128 GB capacity, an 8192-bit bus, and 5.32 TB/s bandwidth. The RTX PRO 6000 uses GDDR7 with 96 GB capacity, a 512-bit bus, and 1.79 TB/s bandwidth. HBM3 provides far wider bus access and higher bandwidth at the cost of integration complexity, while GDDR7 allows a more conventional board design. The MI300A's memory clock is 1300 MHz with 5.2 Gbps effective, while the RTX PRO 6000's memory clock is 1750 MHz with 28 Gbps effective.

The compute pipelines differ in composition. The MI300A has 14,592 shading units, 912 texture mapping units, and no ROPs, no RT cores, and no tensor cores listed. The RTX PRO 6000 has 24,064 shading units, 752 texture mapping units, 192 ROPs, 188 RT cores, and 752 tensor cores. The NVIDIA card has 65% more shading units, while the AMD card has 21% more TMUs. The absence of ROPs and graphics APIs on the MI300A confirms it is not designed for rasterization or real-time graphics.

Clock behavior also separates them. The MI300A runs at 1000 MHz base and 2100 MHz boost. The RTX PRO 6000 runs at 1590 MHz base and 2617 MHz boost, a 59% higher base clock and a 24.6% higher boost clock. Higher clocks contribute to the NVIDIA card's FP32 lead, but the MI300A's wider memory bus compensates in bandwidth-bound scenarios.

Form factors and power delivery reflect their intended environments. The MI300A is an OAM Module with no power connectors and no display outputs, designed for server chassis with baseboard power delivery. The RTX PRO 6000 is a dual-slot card measuring 304 mm by 137 mm by 40 mm, with a single 16-pin power connector and four DisplayPort 2.1b outputs. The RTX PRO 6000 has a TDP of 600 W and a suggested PSU of 1000 W; the MI300A has a TDP of 750 W and a suggested PSU of 1150 W.

Release timing differs as well. The MI300A was released on December 5, 2023, as part of the Instinct (MIx) generation, succeeding Radeon Instinct. The RTX PRO 6000 was released on March 17, 2025, in the Blackwell PRO W (x000) generation, succeeding Workstation Ada. The NVIDIA card is marked as Active in production status, while the MI300A has no production status recorded. The RTX PRO 6000 has a launch MSRP of 8,565 USD. The MI300A has no launch MSRP listed.

The API support gap is total. The MI300A lists N/A for DirectX, OpenGL, and Vulkan. The RTX PRO 6000 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This makes the NVIDIA card suitable for applications that require a graphics API, while the MI300A is restricted to compute workloads that do not rely on a display or graphics stack. The bus interface is the same for both: PCIe 5.0 x16.