AMD Instinct MI355X vs NVIDIA RTX PRO 5000 Blackwell Comparison

Head-to-Head Benchmarks

The recorded database contains no direct head-to-head benchmark entries for the AMD Instinct MI355X and the NVIDIA RTX PRO 5000 Blackwell. The MI355X has no benchmark scores listed, while the RTX PRO 5000 Blackwell has three recorded results. The RTX PRO 5000 Blackwell scores 9,579.5 in 3DMark Steel Nomad DX12, 254,116 in Geekbench OpenCL, and 282,631 in Geekbench Vulkan. Its average benchmark score is 182,109, placing it in the 98th percentile of all GPUs in the database. The MI355X sits at the 50th percentile with an average score of zero, meaning no performance data has been captured for it yet.

Without measured results for the MI355X, a direct numeric comparison of compute performance is not possible from the database. The RTX PRO 5000 Blackwell’s nearest rivals provide context for its standing. It trails the NVIDIA A100 SXM4 80 GB by 0.9%, the NVIDIA RTX 5000 Ada Generation by 1.4%, and the NVIDIA A100 SXM4 40 GB by 2.7%. It leads the NVIDIA GeForce RTX 4090 D by 2.3%. These deltas show the RTX PRO 5000 Blackwell clustering tightly with prior-generation flagship accelerators, within a narrow band of roughly 3% either way.

The MI355X’s theoretical specifications suggest it should be competitive, but the database has no empirical scores to confirm that. Its FP32 throughput is listed at 78.64 TFLOPS, which exceeds the RTX PRO 5000 Blackwell’s 66.94 TFLOPS. Its FP16 rate is also 78.64 TFLOPS with a 1:1 ratio, matching the FP32 figure. The RTX PRO 5000 Blackwell delivers 66.94 TFLOPS FP16, also at 1:1. These figures indicate the MI355X holds a raw compute advantage on paper, but without benchmark runs, that advantage remains unverified.

The Verdict

The data supports a clear choice for buyers who need verified, working performance today: the NVIDIA RTX PRO 5000 Blackwell. It has three benchmark results, a 98th percentile ranking, and an average score of 182,109. Its nearest rivals, all established accelerators, sit within 2.7% of its average score, confirming it performs at the level of the A100 series and RTX 5000 Ada Generation. The MI355X, by contrast, has no measured results, no average score, and a 50th percentile rank by default. Selecting it requires trusting its listed specifications without any database evidence.

The MI355X is a different class of product in terms of scale. It carries 288 GB of HBM3e memory, an 8192-bit bus, and 8.19 TB/s of bandwidth. The RTX PRO 5000 Blackwell has 48 GB of GDDR7, a 384-bit bus, and 1.34 TB/s. The MI355X also draws 1400 W versus 300 W and uses an OAM module form factor, while the RTX PRO 5000 Blackwell is a dual-slot card with a 16-pin power connector. These differences point to distinct deployment targets: the MI355X targets dense compute racks, the RTX PRO 5000 Blackwell targets workstations and servers that need display outputs and standard PCIe card installation.

The verdict from the database is straightforward. For workloads requiring proven OpenCL, Vulkan, or DX12 performance, the RTX PRO 5000 Blackwell is the only option with recorded data. For workloads requiring massive memory capacity and bandwidth, the MI355X has the specifications, but no benchmark evidence to confirm its real-world behavior. The RTX PRO 5000 Blackwell also has a launch MSRP of 5,099 USD, while the MI355X has no listed launch MSRP.

Architecture Differences

The two accelerators use fundamentally different architectures. The MI355X is built on CDNA 4.0, AMD’s compute-focused design, and uses the MI350 256CU chip. The RTX PRO 5000 Blackwell uses NVIDIA’s Blackwell 2.0 architecture with the GB202 chip. The process nodes differ: the MI355X uses a 3 nm process, while the RTX PRO 5000 Blackwell uses a 5 nm process, both from TSMC. The MI355X has 185,000 million transistors on a 2380 mm² die, giving a density of 77.7 million transistors per square millimeter. The RTX PRO 5000 Blackwell has 92,200 million transistors on a 750 mm² die, with a higher density of 122.9 million per square millimeter.

Compute resources diverge significantly. The MI355X has 16,384 shading units, 1,024 texture mapping units, and zero ROPs. The RTX PRO 5000 Blackwell has 14,080 shading units, 440 TMUs, and 160 ROPs. The MI355X has no listed RT cores or tensor cores, while the RTX PRO 5000 Blackwell includes 110 RT cores and 440 tensor cores. The MI355X’s texture rate is 2,457.6 GTexel/s, more than double the RTX PRO 5000 Blackwell’s 1,045.9 GTexel/s. The RTX PRO 5000 Blackwell has a pixel rate of 380.3 GPixel/s, while the MI355X lists 0 MPixel/s, consistent with its lack of ROPs and display outputs.

Memory architecture separates the two sharply. The MI355X uses HBM3e with 288 GB capacity, while the RTX PRO 5000 Blackwell uses GDDR7 with 48 GB. The MI355X’s memory clock is 2000 MHz with 8 Gbps effective, and its bus width is 8192 bits. The RTX PRO 5000 Blackwell runs its memory at 1750 MHz with 28 Gbps effective on a 384-bit bus. Bandwidth favors the MI355X at 8.19 TB/s versus 1.34 TB/s. Clock speeds also differ: the MI355X has a 1000 MHz base and 2400 MHz boost, while the RTX PRO 5000 Blackwell has a 1740 MHz base and 2377 MHz boost.

API support is another differentiator. The MI355X lists no DirectX, OpenGL, or Vulkan support. The RTX PRO 5000 Blackwell supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI355X has no display outputs; the RTX PRO 5000 Blackwell has four DisplayPort 2.1b outputs. The MI355X’s bus interface is PCIe 5.0 x16, matching the RTX PRO 5000 Blackwell’s PCIe 5.0 x16.

FAQ

Q: Which GPU has a higher FP32 compute throughput?

A: The AMD Instinct MI355X lists 78.64 TFLOPS FP32, while the NVIDIA RTX PRO 5000 Blackwell lists 66.94 TFLOPS FP32. The MI355X is about 17% higher on paper.

Q: How much memory does each card have?

A: The MI355X has 288 GB of HBM3e, while the RTX PRO 5000 Blackwell has 48 GB of GDDR7. The MI355X also has a wider 8192-bit bus versus 384-bit, and 8.19 TB/s bandwidth versus 1.34 TB/s.

Q: Does the RTX PRO 5000 Blackwell have any benchmark results?

A: Yes, it has three: 9,579.5 in 3DMark Steel Nomad DX12, 254,116 in Geekbench OpenCL, and 282,631 in Geekbench Vulkan. Its average score is 182,109, placing it at the 98th percentile. The MI355X has no recorded benchmarks.

Q: Which card supports display outputs?

A: The RTX PRO 5000 Blackwell has four DisplayPort 2.1b outputs. The MI355X has no display outputs at all, indicating a compute-only design.

Q: What are the power requirements?

A: The MI355X has a TDP of 1400 W and a suggested PSU of 1800 W. The RTX PRO 5000 Blackwell has a TDP of 300 W and a suggested PSU of 700 W. The MI355X uses an OAM module slot width with no power connectors, while the RTX PRO 5000 Blackwell is dual-slot with one 16-pin connector.

Q: How does the RTX PRO 5000 Blackwell compare to its nearest rivals?

A: Its average score of 182,109 is within 2.7% of the NVIDIA A100 SXM4 80 GB, RTX 5000 Ada Generation, and A100 SXM4 40 GB. It leads the GeForce RTX 4090 D by 2.3%.

Where Each One Wins

The NVIDIA RTX PRO 5000 Blackwell wins in every category where measured performance exists. It has verified scores in DX12, OpenCL, and Vulkan, which directly support workloads like 3D rendering, GPU compute via OpenCL, and cross-platform graphics. Its 98th percentile ranking against all GPUs confirms it outperforms the vast majority of recorded hardware. Its nearest rival deltas, all within 2.7%, show it trades blows with the A100 series and RTX 5000 Ada Generation, all of which are proven accelerators. Its 48 GB of GDDR7 and 1.34 TB/s bandwidth, while smaller than the MI355X, are sufficient for professional visualization tasks, and its four DisplayPort 2.1b outputs enable direct display connection. Its 300 W TDP and dual-slot form factor allow installation in standard workstation chassis with a 700 W PSU.

The AMD Instinct MI355X wins on raw specifications where the database has no measurements to contradict them. Its 288 GB HBM3e capacity is six times larger than the RTX PRO 5000 Blackwell’s 48 GB, and its 8.19 TB/s bandwidth is over six times higher. Its 78.64 TFLOPS FP32 and FP16 throughput exceeds the RTX PRO 5000 Blackwell’s 66.94 TFLOPS. Its 1,024 TMUs and 2,457.6 GTexel/s texture rate outpace the RTX PRO 5000 Blackwell’s 440 TMUs and 1,045.9 GTexel/s. Its 185,000 million transistors and 2380 mm² die indicate a much larger, more complex chip. Its 3 nm process node and 1400 W TDP profile it for high-density compute environments where power and cooling are not constraints. The MI355X also has no API support or display outputs, meaning it is not designed for interactive graphics, but its memory and bandwidth characteristics position it for large model inference or training workloads.

Specification Differences

| Specification | AMD Instinct MI355X | NVIDIA RTX PRO 5000 Blackwell |

|---|---:|---:|

| Architecture | CDNA 4.0 | Blackwell 2.0 |

| Chip | MI350 256CU | GB202 |

| Process Node | 3 nm | 5 nm |

| Transistors | 185,000 million | 92,200 million |

| Die Size | 2380 mm² | 750 mm² |

| Transistor Density | 77.7M / mm² | 122.9M / mm² |

| Base Clock | 1000 MHz | 1740 MHz |

| Boost Clock | 2400 MHz | 2377 MHz |

| Memory Clock | 2000 MHz, 8 Gbps effective | 1750 MHz, 28 Gbps effective |

| Memory Size | 288 GB | 48 GB |

| Memory Type | HBM3e | GDDR7 |

| Memory Bus Width | 8192 bit | 384 bit |

| Memory Bandwidth | 8.19 TB/s | 1.34 TB/s |

| Shading Units | 16384 | 14080 |

| TMUs | 1024 | 440 |

| ROPs | 0 | 160 |

| RT Cores | Not listed | 110 |

| Tensor Cores | Not listed | 440 |

| Pixel Rate | 0 MPixel/s | 380.3 GPixel/s |

| Texture Rate | 2,457.6 GTexel/s | 1,045.9 GTexel/s |

| FP32 | 78.64 TFLOPS | 66.94 TFLOPS |

| FP16 | 78.64 TFLOPS (1:1) | 66.94 TFLOPS (1:1) |

| TDP | 1400 W | 300 W |

| Slot Width | OAM Module | Dual-slot |

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

| Suggested PSU | 1800 W | 700 W |

| Bus Interface | PCIe 5.0 x16 | PCIe 5.0 x16 |

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

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | 102 mm x 165 mm | 267 mm x 111 mm x 40 mm |

| Release Date | 2025-06-11 | 2025-03-17 |

| Production Status | Not listed | Active |

| Predecessor | Radeon Instinct | Workstation Ada |

| Launch MSRP | Not listed | 5,099 USD |