AMD Instinct MI308X vs NVIDIA RTX PRO 5000 Blackwell Comparison

# AMD Instinct MI308X vs NVIDIA RTX PRO 5000 Blackwell

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the AMD Instinct MI308X and the NVIDIA RTX PRO 5000 Blackwell. The MI308X has an average benchmark score of 0 with a percentile ranking of 50 among all GPUs, while the RTX PRO 5000 Blackwell records an average benchmark score of 182,109 and sits in the 98th percentile. That gap is substantial, placing the NVIDIA part near the top of the entire GPU hierarchy while the AMD accelerator shows no recorded benchmark activity in the database.

The RTX PRO 5000 Blackwell delivers its measured performance across three distinct tests. In 3DMark Steel Nomad DX12, it scores 9,579.5. In Geekbench OpenCL, it reaches 254,116. In Geekbench Vulkan, it posts 282,631. These results confirm strong compute and graphics throughput for the NVIDIA card, with the Vulkan score exceeding the OpenCL score by roughly 11 percent, indicating efficient driver and architecture scaling across different API workloads.

The MI308X, by contrast, has no benchmark entries in the database. Its percentile vs all GPUs stands at 50, but that figure reflects the absence of recorded data rather than a measured midpoint of performance. The NVIDIA part's nearest rivals in the database include the NVIDIA A100 SXM4 80 GB, which scores 183,725 and sits 0.9 percent above the RTX PRO 5000 Blackwell, and the NVIDIA A100 SXM4 40 GB at 187,147, which is 2.7 percent higher. The NVIDIA RTX 5000 Ada Generation scores 184,664, 1.4 percent above, while the NVIDIA GeForce RTX 4090 D scores 178,050, 2.3 percent below. These deltas show the RTX PRO 5000 Blackwell trading blows with flagship AI accelerators and high-end consumer cards, all within a narrow 5 percent band.

For the MI308X, no such comparative data exists. The database lists wins as zero for both parts in head-to-head comparisons, meaning no direct matchup was recorded. The practical takeaway from the recorded data is clear: the RTX PRO 5000 Blackwell has verifiable, quantifiable performance across multiple benchmarks, while the MI308X lacks any measured scores to analyze.

Architecture Differences

The two accelerators diverge fundamentally in their underlying architectures. The AMD Instinct MI308X uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, while the NVIDIA RTX PRO 5000 Blackwell uses the Blackwell 2.0 architecture with the GB202 chip. Both are fabricated on a 5 nm process at TSMC, but the similarities end there.

Transistor counts differ dramatically. The MI308X packs 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4 million per square millimeter. The RTX PRO 5000 Blackwell contains 92,200 million transistors on a 750 mm² die, giving a density of 122.9 million per square millimeter. The AMD chip is larger by 267 mm² and carries roughly 66 percent more transistors, reflecting its focus on raw compute throughput rather than graphics features.

The MI308X is built as an OAM Module with no display outputs and no graphics API support. It reports zero pixel rate and zero ROPs, with no ray tracing cores and no tensor cores listed. Its texture rate reaches 2,553.6 GTexel/s from 1,216 TMUs and 19,456 shading units. The RTX PRO 5000 Blackwell, in contrast, includes 160 ROPs, 110 ray tracing cores, and 440 tensor cores, with a pixel rate of 380.3 GPixel/s and a texture rate of 1,045.9 GTexel/s from 440 TMUs and 14,080 shading units. The NVIDIA part supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the AMD part lists N/A for all three APIs.

Clock behavior also separates the two. The MI308X has a base clock of 1000 MHz and a boost clock of 2100 MHz. The RTX PRO 5000 Blackwell runs at a 1740 MHz base and 2377 MHz boost. The NVIDIA card derives its higher frequencies from a smaller, more graphics-oriented die, while the AMD chip relies on a massive HBM3 memory subsystem to feed its compute units.

Memory architecture presents the starkest contrast. The MI308X uses 192 GB of HBM3 across an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RTX PRO 5000 Blackwell uses 48 GB of GDDR7 across a 384-bit bus, delivering 1.34 TB/s. The AMD part offers four times the capacity and nearly four times the bandwidth, a design goal aimed squarely at large-model training and inference workloads. The NVIDIA part's memory clock runs at 1750 MHz with 28 Gbps effective speed, while the AMD memory clock is 1300 MHz with 5.2 Gbps effective, though the wider bus more than compensates for the lower per-pin speed.

Where Each One Wins

The recorded data supports distinct use-case advantages for each card, though the MI308X's lack of benchmarks limits direct comparison. The RTX PRO 5000 Blackwell wins in any scenario requiring graphics output, display connectivity, or API compatibility. It offers four DisplayPort 2.1b outputs, supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and includes ray tracing and tensor cores. Its 66.94 TFLOPS FP32 and FP16 performance, measured at a 1:1 ratio, supports professional visualization, real-time rendering, and compute workloads that leverage graphics APIs. The 380.3 GPixel/s fill rate and 160 ROPs enable high-resolution rasterization, and its dual-slot form factor with a single 16-pin power connector fits standard workstation configurations.

The MI308X wins on sheer memory capacity and bandwidth. With 192 GB of HBM3 and 5.32 TB/s of bandwidth, it provides 4.4 times the bandwidth of the RTX PRO 5000 Blackwell and four times the memory capacity. For workloads that require holding large datasets, model weights, or intermediate tensors in fast memory, the AMD part avoids capacity spills that would force the NVIDIA card to rely on slower system memory. The MI308X also delivers higher raw compute throughput in FP32: 81.72 TFLOPS versus 66.94 TFLOPS, a 22 percent advantage. Its texture rate of 2,553.6 GTexel/s more than doubles the NVIDIA part's 1,045.9 GTexel/s, though the absence of ROPs and pixel output means those TMUs serve compute-oriented texture fetches rather than graphics rendering.

The RTX PRO 5000 Blackwell's benchmark scores place it 2.3 percent above the GeForce RTX 4090 D and within 2.7 percent of the A100 SXM4 40 GB, indicating strong general compute performance for a workstation card. The MI308X, with no recorded benchmarks, cannot be positioned against those rivals in the database. Its advantages are structural: memory capacity, bandwidth, and FP32 throughput. The RTX PRO 5000 Blackwell's advantages are functional: graphics APIs, display outputs, ray tracing, tensor cores, and measured benchmark results.

Specification Differences

The following fields differ between the two parts in the database:

• Chip: Aqua Vanjaram (AMD) versus GB202 (NVIDIA)
• Architecture: CDNA 3.0 versus Blackwell 2.0
• Generation: Instinct (MIx) versus Blackwell PRO W (x000)
• Transistors: 153,000 million versus 92,200 million
• Die Size: 1017 mm² versus 750 mm²
• Transistor Density: 150.4M / mm² versus 122.9M / mm²
• Base Clock: 1000 MHz versus 1740 MHz
• Boost Clock: 2100 MHz versus 2377 MHz
• Memory Clock: 1300 MHz 5.2 Gbps effective versus 1750 MHz 28 Gbps effective
• Memory Size: 192 GB versus 48 GB
• Memory Type: HBM3 versus GDDR7
• Memory Bus Width: 8192 bit versus 384 bit
• Memory Bandwidth: 5.32 TB/s versus 1.34 TB/s
• Shading Units: 19,456 versus 14,080
• TMUs: 1,216 versus 440
• ROPs: 0 versus 160
• RT Cores: null versus 110
• Tensor Cores: null versus 440
• Pixel Rate: 0 MPixel/s versus 380.3 GPixel/s
• Texture Rate: 2,553.6 GTexel/s versus 1,045.9 GTexel/s
• FP32: 81.72 TFLOPS versus 66.94 TFLOPS
• FP16: 81.72 TFLOPS (1:1) versus 66.94 TFLOPS (1:1)
• TDP: 750 W versus 300 W
• Slot Width: OAM Module versus Dual-slot
• Power Connectors: None versus 1x 16-pin
• Suggested PSU: 1150 W versus 700 W
• Display Outputs: No outputs versus 4x DisplayPort 2.1b
• DirectX: N/A versus 12 Ultimate (12_2)
• OpenGL: N/A versus 4.6
• Vulkan: N/A versus 1.4
• Dimensions: null versus 267 mm length, 111 mm height, 40 mm width
• Production Status: null versus Active
• Release Date: 2023-12-05 versus 2025-03-17
• Predecessor: Radeon Instinct versus Workstation Ada
• Launch MSRP: null versus 5,099 USD

The MI308X draws 750 W and requires a 1150 W suggested PSU, while the RTX PRO 5000 Blackwell draws 300 W and needs a 700 W PSU. The AMD card uses an OAM Module form factor with no power connectors, relying on the host board for power delivery. The NVIDIA card is a dual-slot PCIe card with a single 16-pin connector and explicit physical dimensions.

FAQ

Q: Which card has higher FP32 compute throughput?

A: The AMD Instinct MI308X delivers 81.72 TFLOPS FP32, which is 22 percent higher than the NVIDIA RTX PRO 5000 Blackwell's 66.94 TFLOPS. Both cards run FP16 at a 1:1 ratio to their FP32 figures.

Q: How do their memory subsystems compare?

A: The MI308X uses 192 GB of HBM3 on a 8192-bit bus with 5.32 TB/s bandwidth. The RTX PRO 5000 Blackwell uses 48 GB of GDDR7 on a 384-bit bus with 1.34 TB/s bandwidth. The AMD part provides four times the capacity and approximately four times the bandwidth.

Q: Does the RTX PRO 5000 Blackwell support display outputs?

A: Yes, it includes 4x DisplayPort 2.1b outputs and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI308X has no display outputs and lists N/A for all graphics APIs.

Q: What are the nearest rivals to the RTX PRO 5000 Blackwell in the database?

A: The NVIDIA A100 SXM4 80 GB scores 183,725, which is 0.9 percent higher. The NVIDIA RTX 5000 Ada Generation scores 184,664, 1.4 percent higher. The NVIDIA GeForce RTX 4090 D scores 178,050, 2.3 percent lower. The NVIDIA A100 SXM4 40 GB scores 187,147, 2.7 percent higher.

Q: What is the power draw difference?

A: The MI308X has a TDP of 750 W and a suggested PSU of 1150 W, while the RTX PRO 5000 Blackwell has a TDP of 300 W and a suggested PSU of 700 W. The NVIDIA card also uses a single 16-pin power connector, whereas the AMD card uses an OAM Module with no onboard connectors.

Q: How do their physical formats differ?

A: The MI308X is an OAM Module with no listed dimensions. The RTX PRO 5000 Blackwell is a dual-slot card measuring 267 mm in length, 111 mm in height, and 40 mm in width, with a production status of Active.