AMD Instinct MI455X vs AMD Radeon PRO W7600 Comparison

Where Each One Wins

The AMD Instinct MI455X and AMD Radeon PRO W7600 occupy completely different positions in the database. The MI455X is an Instinct-class compute accelerator with no display outputs, no DirectX, OpenGL, or Vulkan support, and no recorded benchmark scores. The W7600 is a Radeon Pro workstation card with full graphics API support, DisplayPort 2.1 outputs, and an average benchmark score of 87108 across Geekbench OpenCL and Vulkan tests.

The MI455X wins in raw compute throughput metrics. Its FP32 rating of 157.3 TFLOPS dwarfs the W7600's 19.99 TFLOPS. FP16 performance also favors the MI455X at 157.3 TFLOPS with 1:1 ratio, versus 39.98 TFLOPS at 2:1 ratio for the W7600. Texture rate tells a similar story: 2,457.6 GTexel/s versus 312.3 GTexel/s. Memory bandwidth is the largest gap, with the MI455X delivering 23.3 TB/s over a 24576-bit HBM4 interface, while the W7600 manages 288.0 GB/s over a 128-bit GDDR6 bus.

The W7600 wins in every category related to graphics output and workstation practicality. It has 4x DisplayPort 2.1 outputs, a 156.2 GPixel/s pixel rate, 32 ray tracing cores, and full API support for DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI455X has zero display outputs, zero pixel rate, and no graphics API support. The W7600 also holds a 93rd percentile ranking among all GPUs, while the MI455X sits at the 50th percentile with no benchmark data.

Architecture Differences

The two cards use fundamentally different architectures from AMD. The MI455X is built on CDNA 5.0, a compute-optimized design, while the W7600 uses RDNA 3.0, a graphics-first architecture with the codename Hotpink Bonefish. Their process nodes differ substantially: the MI455X uses a 2 nm TSMC node, and the W7600 uses a 6 nm TSMC node. Transistor counts reflect this gap, with the MI455X packing 320,000 million transistors on a 2990 mm² die, versus 13,300 million transistors on a 204 mm² die for the W7600. Transistor density favors the MI455X at 107.0M per mm², compared to 65.2M per mm² for the W7600.

The MI455X uses the MI450 256CU chip, while the W7600 uses Navi 33. Shading unit counts differ by an order of magnitude: 32768 for the MI455X versus 2048 for the W7600. TMUs number 1024 versus 128. The MI455X reports zero ROPs, while the W7600 has 64. The MI455X has no ray tracing cores listed, but the W7600 includes 32. Neither card lists tensor cores.

Memory architecture is one of the most significant splits. The MI455X carries 432 GB of HBM4 memory with a 24576-bit bus width. The W7600 uses 8 GB of GDDR6 with a 128-bit bus. Clock speeds also differ in character: the MI455X runs a 1000 MHz base and 2400 MHz boost, while the W7600 runs a 1720 MHz base and 2440 MHz boost. The MI455X memory clock is listed at 1900 MHz with 7.6 Gbps effective, while the W7600 memory runs at 2250 MHz with 18 Gbps effective. Thermal design power reflects the compute versus workstation split: the MI455X draws 2300 W with a 2700 W suggested PSU, and the W7600 draws 130 W with a 300 W suggested PSU.

The MI455X is an EAM Module form factor with no power connectors and no display outputs. The W7600 is a single-slot card, 241 mm long and 115 mm tall, with one 6-pin power connector. Bus interfaces also differ: the MI455X uses PCIe 6.0 x16, while the W7600 uses PCIe 4.0 x8.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark comparisons between these two cards. However, the recorded measurements for the W7600 provide context for its performance class. The W7600 scores 81528 in Geekbench OpenCL and 92688 in Geekbench Vulkan, averaging 87108. Its nearest rivals in the database are the NVIDIA Quadro GP100 at 87445 (-0.4% delta), the NVIDIA CMP 40HX at 85637 (+1.7% delta), the NVIDIA RTX A4500 Mobile at 91134 (-4.4% delta), and the NVIDIA RTX A4500 at 91671 (-5% delta). These figures place the W7600 within a narrow performance band around 85,000 to 92,000 points.

The MI455X has no benchmark entries in the database, so its average score is recorded as zero and it holds no nearest rival comparisons. Its percentile ranking of 50 reflects the absence of measured data rather than actual performance. The compute metrics in its specification, such as 157.3 TFLOPS FP32 and 23.3 TB/s memory bandwidth, suggest a device aimed at a different workload class entirely, one where graphics benchmarks are not the relevant measure.

The W7600's pixel rate of 156.2 GPixel/s and texture rate of 312.3 GTexel/s give it a conventional workstation rasterization profile. The MI455X, with a 0 MPixel/s pixel rate and 2,457.6 GTexel/s texture rate, is not designed to produce rendered frames. Its texture throughput is an order of magnitude higher, but with no ROPs and no display pipeline, that throughput serves compute tasks rather than graphics output.

The Verdict

The data indicates two cards for two distinct buyers. The AMD Instinct MI455X is a compute accelerator for workloads that need massive memory capacity, enormous bandwidth, and extreme FP32 or FP16 throughput. Its 432 GB of HBM4 memory, 23.3 TB/s bandwidth, and 157.3 TFLOPS FP32 performance place it in a category where graphics output is irrelevant. The absence of display outputs, graphics API support, and a 2300 W TDP confirm this positioning. This card is for systems that process data at scale, not for deskside workstations.

The AMD Radeon PRO W7600 is a workstation graphics card for professionals who need display output, ray tracing, and full API compatibility. Its 8 GB of GDDR6 memory, 32 ray tracing cores, 4x DisplayPort 2.1 outputs, and DirectX 12 Ultimate support make it a conventional choice for rendering, CAD, and content creation workloads. Its 93rd percentile ranking among all GPUs and its clustered nearest rivals (Quadro GP100, CMP 40HX, RTX A4500 Mobile, RTX A4500) show it sits in a competitive mid-range workstation segment.

From a pure specification standpoint, the MI455X dominates in raw compute metrics: 7.9 times the FP32 throughput, 5.9 times the texture rate, and roughly 81 times the memory bandwidth of the W7600. But those numbers do not translate to graphics performance, because the MI455X has no graphics pipeline. The W7600 wins in every metric that matters for display-driven work: pixel rate, ray tracing cores, API support, and physical practicality with its 130 W TDP and single-slot design.

The choice depends on the workload. Compute-heavy tasks that fit within a server or accelerator chassis point to the MI455X. Any task requiring a monitor, a graphics API, or a standard workstation slot points to the W7600. The two cards are not substitutes; they are complementary tools for different parts of a computing environment.

FAQ

Q: Which card has more memory bandwidth?

A: The AMD Instinct MI455X, with 23.3 TB/s over a 24576-bit HBM4 interface. The AMD Radeon PRO W7600 has 288.0 GB/s over a 128-bit GDDR6 bus.

Q: Does the AMD Instinct MI455X support display output?

A: No. The MI455X lists no display outputs, while the W7600 provides 4x DisplayPort 2.1 connections.

Q: What is the average benchmark score of the AMD Radeon PRO W7600?

A: The W7600 has an average benchmark score of 87108, based on Geekbench OpenCL (81528) and Geekbench Vulkan (92688) results. The MI455X has no recorded benchmark scores.

Q: Which card supports ray tracing?

A: The AMD Radeon PRO W7600 includes 32 ray tracing cores. The AMD Instinct MI455X lists no ray tracing cores.

Q: How does the W7600 compare to its nearest rivals in the database?

A: The W7600 sits close to the NVIDIA Quadro GP100 at 87445 (-0.4% delta), ahead of the NVIDIA CMP 40HX at 85637 (+1.7% delta), and behind the NVIDIA RTX A4500 Mobile at 91134 (-4.4% delta) and NVIDIA RTX A4500 at 91671 (-5% delta).

Q: What power delivery does each card require?

A: The MI455X has a 2300 W TDP and a 2700 W suggested PSU, with no power connectors listed. The W7600 has a 130 W TDP, a 300 W suggested PSU, and uses one 6-pin power connector.

Specification Differences

| Specification | AMD Instinct MI455X | AMD Radeon PRO W7600 |

|---|---|---|

| Architecture | CDNA 5.0 | RDNA 3.0 |

| Chip | MI450 256CU | Navi 33 |

| Process Node | 2 nm | 6 nm |

| Foundry | TSMC | TSMC |

| Transistors | 320,000 million | 13,300 million |

| Die Size | 2990 mm² | 204 mm² |

| Transistor Density | 107.0M / mm² | 65.2M / mm² |

| Base Clock | 1000 MHz | 1720 MHz |

| Boost Clock | 2400 MHz | 2440 MHz |

| Memory Clock | 1900 MHz, 7.6 Gbps effective | 2250 MHz, 18 Gbps effective |

| Memory Size | 432 GB | 8 GB |

| Memory Type | HBM4 | GDDR6 |

| Memory Bus Width | 24576 bit | 128 bit |

| Memory Bandwidth | 23.3 TB/s | 288.0 GB/s |

| Shading Units | 32768 | 2048 |

| TMUs | 1024 | 128 |

| ROPs | 0 | 64 |

| Ray Tracing Cores | None listed | 32 |

| Pixel Rate | 0 MPixel/s | 156.2 GPixel/s |

| Texture Rate | 2,457.6 GTexel/s | 312.3 GTexel/s |

| FP32 Performance | 157.3 TFLOPS | 19.99 TFLOPS |

| FP16 Performance | 157.3 TFLOPS (1:1) | 39.98 TFLOPS (2:1) |

| TDP | 2300 W | 130 W |

| Suggested PSU | 2700 W | 300 W |

| Slot Width | EAM Module | Single-slot |

| Power Connectors | None | 1x 6-pin |

| Bus Interface | PCIe 6.0 x16 | PCIe 4.0 x8 |

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

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

| OpenGL Support | N/A | 4.6 |

| Vulkan Support | N/A | 1.4 |

| Release Date | 2026-07-22 | 2023-08-02 |

| Production Status | Not listed | Active |

| Launch MSRP | Not listed | 599 USD |