AMD Instinct MI455X vs AMD Radeon PRO W7500 Comparison

AMD Instinct MI455X and AMD Radeon PRO W7500 are two fundamentally different AMD offerings, one aimed at massive compute installations and the other at professional graphics workstations. The data reveals that these cards share almost no common ground in architecture, physical design, or intended workload. The MI455X is a data center compute module with no display outputs, while the W7500 is a single-slot workstation card with four DisplayPort outputs. Benchmark results are only recorded for the W7500, as the MI455X has no benchmark entries in the database. This leaves the analysis to focus on architectural and specification differences, along with the W7500’s measured performance relative to its nearest rivals.

Where Each One Wins

The AMD Radeon PRO W7500 wins in every category where the database has recorded benchmark scores, as the AMD Instinct MI455X has no benchmark entries. The W7500’s average benchmark score is 16415, placing it at the 59th percentile of all GPUs in the database. Its strongest recorded result is in Geekbench Vulkan, where it scores 68634, followed by Geekbench OpenCL at 58213. In Passmark tests, the W7500 shows a mixed profile: it scores 13368 in G3D, 5910 in GPU Compute, but much lower in legacy DirectX tests, with scores of 200 in DirectX 9, 125 in DirectX 11, 65 in DirectX 10, and 46 in DirectX 12. The G2D score is 1174.

The MI455X, by contrast, has no benchmark scores in the database, so its performance cannot be directly quantified. However, its specification sheet indicates a compute-oriented design with a peak FP32 throughput of 157.3 TFLOPS, which is 12.9 times the W7500’s 12.19 TFLOPS. For FP16 workloads, the MI455X again delivers 157.3 TFLOPS with a 1:1 ratio, whereas the W7500 achieves 24.37 TFLOPS with a 2:1 ratio. The MI455X also has a texture rate of 2,457.6 GTexel/s, which is roughly 12.9 times the W7500’s 190.4 GTexel/s. The MI455X wins on raw compute throughput and memory bandwidth, but the W7500 wins on having any recorded benchmark data at all, as well as on display capabilities and software API support.

Architecture Differences

The two cards use completely different GPU architectures. The AMD Instinct MI455X is based on CDNA 5.0, while the AMD Radeon PRO W7500 uses RDNA 3.0. The chip names also differ: the MI455X uses an "MI450 256CU" chip, while the W7500 uses a "Navi 33" chip with the codename "Hotpink Bonefish". The MI455X belongs to the Instinct (MIx) generation, whereas the W7500 is from the Radeon Pro Navi (Navi III Series) generation. The MI455X has no display outputs, no API support listed for DirectX, OpenGL, or Vulkan, and reports a pixel rate of 0 MPixel/s. The W7500 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and has a pixel rate of 108.8 GPixel/s.

The MI455X has 32768 shading units, 1024 TMUs, and 0 ROPs, while the W7500 has 1792 shading units, 112 TMUs, and 64 ROPs. The MI455X also has 28 ray tracing cores, whereas the MI455X lists no RT cores. The process nodes differ significantly: the MI455X is built on a 2 nm process at TSMC, while the W7500 uses a 6 nm process, also at TSMC. Transistor counts are starkly different: the MI455X packs 320,000 million transistors on a 2990 mm² die, yielding a density of 107.0M per mm². The W7500 has 13,300 million transistors on a 204 mm² die, with a density of 65.2M per mm².

FAQ

Q: Which card has a higher FP32 compute throughput?

A: The AMD Instinct MI455X delivers 157.3 TFLOPS FP32, which is 12.9 times the 12.19 TFLOPS of the AMD Radeon PRO W7500.

Q: Does the AMD Instinct MI455X support display outputs?

A: No, the MI455X has no display outputs, while the W7500 provides four DisplayPort 2.1 outputs.

Q: What is the memory configuration difference between the two cards?

A: The MI455X has 432 GB of HBM4 memory on a 24576-bit bus, providing 23.3 TB/s bandwidth. The W7500 has 8 GB of GDDR6 memory on a 128-bit bus, providing 256.0 GB/s bandwidth.

Q: Which card has a higher benchmark percentile ranking?

A: The W7500 is at the 59th percentile of all GPUs in the database, with an average benchmark score of 16415. The MI455X has no benchmark scores and is listed at the 50th percentile with an average score of 0.

Q: What is the difference in power consumption between the two cards?

A: The MI455X has a TDP of 2300 W with a suggested PSU of 2700 W, while the W7500 has a TDP of 70 W with a suggested PSU of 250 W.

Q: Which card has ray tracing support?

A: The W7500 includes 28 ray tracing cores, whereas the MI455X does not list any ray tracing cores in its specifications.

Specification Differences

The AMD Instinct MI455X and AMD Radeon PRO W7500 differ across nearly every specification field. The MI455X uses a CDNA 5.0 architecture with an MI450 256CU chip, while the W7500 uses RDNA 3.0 with a Navi 33 chip. The process node is 2 nm for the MI455X versus 6 nm for the W7500, both at TSMC. Transistor count is 320,000 million for the MI455X versus 13,300 million for the W7500, and die size is 2990 mm² versus 204 mm². Transistor density is 107.0M per mm² for the MI455X and 65.2M per mm² for the W7500.

Clock speeds differ: the MI455X has a base clock of 1000 MHz and a boost clock of 2400 MHz, while the W7500 has a base clock of 1500 MHz and a boost clock of 1700 MHz. Memory clocks are 1900 MHz (7.6 Gbps effective) for the MI455X and 2000 MHz (16 Gbps effective) for the W7500. Memory size is 432 GB of HBM4 for the MI455X versus 8 GB of GDDR6 for the W7500. Bus width is 24576 bit versus 128 bit, and bandwidth is 23.3 TB/s versus 256.0 GB/s. Shading units are 32768 versus 1792, TMUs are 1024 versus 112, and ROPs are 0 versus 64. The W7500 has 28 RT cores; the MI455X has none. Pixel rate is 0 MPixel/s versus 108.8 GPixel/s, and texture rate is 2,457.6 GTexel/s versus 190.4 GTexel/s. FP32 is 157.3 TFLOPS versus 12.19 TFLOPS, and FP16 is 157.3 TFLOPS (1:1) versus 24.37 TFLOPS (2:1). TDP is 2300 W versus 70 W. The MI455X uses an EAM Module slot width with no power connectors, while the W7500 is single-slot with no power connectors. The bus interface is PCIe 6.0 x16 for the MI455X and PCIe 4.0 x8 for the W7500. Display outputs are none for the MI455X and four DisplayPort 2.1 for the W7500. API support is N/A for the MI455X, while the W7500 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Dimensions for the MI455X are not listed, while the W7500 measures 216 mm by 115 mm by 20 mm. Release dates are 2026-07-22 for the MI455X and 2023-08-02 for the W7500. The W7500 has a launch MSRP of 429 USD.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark results between the AMD Instinct MI455X and AMD Radeon PRO W7500. The only benchmark data available belongs to the W7500, which has nine recorded scores. The MI455X has zero benchmark entries, making direct numerical comparison impossible. However, the W7500’s scores can be interpreted against its nearest rivals in the database. The W7500’s average benchmark score is 16415. Its closest rival is the NVIDIA RTX PRO 6000 Blackwell with an average score of 16408, a delta of 0 percent. The AMD Radeon RX 5700 XT scores 16361, a delta of 0.3 percent behind. The AMD Radeon Pro 5600M scores 16351, a delta of 0.4 percent behind. The NVIDIA GeForce RTX 5090 D V2 scores 16504, which is 0.5 percent ahead of the W7500. These deltas are all within a narrow band, indicating that the W7500 sits in a tightly contested performance tier.

Looking at individual W7500 scores, the Geekbench Vulkan result of 68634 is notably higher than the Geekbench OpenCL result of 58213, suggesting the card’s compute performance varies by API. In Passmark tests, the G3D score of 13368 is the highest among the DirectX and compute tests, while the GPU Compute score is 5910. The DirectX 9 score of 200 and DirectX 11 score of 125 are substantially higher than the DirectX 10 score of 65 and DirectX 12 score of 46. The G2D score is 1174. These results show a card that performs well in modern compute and graphics workloads but has uneven legacy DirectX performance.

The Verdict

The AMD Radeon PRO W7500 is the only card of the two with measured benchmark data, so any performance-based selection must rely on its recorded scores. The W7500 holds a 59th percentile ranking, with an average benchmark score of 16415, placing it within 0.5 percent of its nearest rivals, including the NVIDIA RTX PRO 6000 Blackwell and the NVIDIA GeForce RTX 5090 D V2. Its specification list supports professional workstation use: 8 GB of GDDR6 memory, four DisplayPort 2.1 outputs, DirectX 12 Ultimate support, and a 70 W TDP. The card is also physically compact at 216 mm long, 115 mm high, and 20 mm wide, fitting a single slot. It has a launch MSRP of 429 USD.

The AMD Instinct MI455X, by contrast, has no benchmark scores, no display outputs, and no API support in the database. Its specifications describe a compute module, not a graphics card: 432 GB of HBM4 memory, 23.3 TB/s bandwidth, 32768 shading units, and 157.3 TFLOPS FP32 throughput. Its 2300 W TDP and EAM Module form factor confirm that it is intended for data center installations, not desktop workstations. The MI455X also has a later release date of 2026-07-22 compared to the W7500’s 2023-08-02.

From the recorded data, the W7500 is the appropriate choice for any workload requiring display output, software API compatibility, or measured benchmark performance. The MI455X should be selected only for compute-heavy tasks that can leverage its massive memory pool and raw throughput, as no benchmark evidence exists in the database to validate its real-world performance. The two cards serve separate markets, and the data does not support a crossover recommendation.