AMD Instinct MI455X vs AMD Ryzen Z1 Extreme GPU Comparison

Head-to-Head Benchmarks

The database contains no recorded benchmark scores for either the AMD Instinct MI455X or the AMD Ryzen Z1 Extreme GPU. Both entries show an average benchmark score of zero, and the head-to-head benchmark table is empty. Consequently, no direct performance comparison can be made from measured data. The percentile ranking for both parts is 50, indicating they sit at the midpoint of all GPUs in the database, though this ranking is based on incomplete benchmark data rather than actual test results.

The absence of benchmark data means that any performance claims must be derived strictly from the technical specifications recorded in the database. The Instinct MI455X lists a peak FP32 throughput of 157.3 TFLOPS, while the Ryzen Z1 Extreme GPU lists 8.294 TFLOPS. The Instinct part also shows a texture rate of 2,457.6 GTexel/s against 129.6 GTexel/s for the Z1 Extreme. These figures represent a theoretical compute gap of roughly nineteen-fold in raw FP32 output, assuming both parts are operating at their listed specifications.

The memory subsystem presents an even wider separation. The Instinct MI455X records 432 GB of HBM4 memory with a 24,576-bit bus and 23.3 TB/s bandwidth. The Ryzen Z1 Extreme GPU uses 16 GB of LPDDR5 on a 64-bit bus with 51.20 GB/s bandwidth. The bandwidth difference is approximately 455-fold in favor of the Instinct part. However, these are static specifications, not measured outcomes, so the database does not confirm how either part behaves under real workloads.

FAQ

Q: Does the AMD Instinct MI455X outperform the AMD Ryzen Z1 Extreme GPU in the database benchmarks?

A: No benchmark scores exist for either part. The head-to-head table is empty, and both GPUs show an average benchmark score of zero. The database records no measured wins for either component.

Q: What is the FP32 compute capacity of each GPU according to the database?

A: The Instinct MI455X lists 157.3 TFLOPS FP32. The Ryzen Z1 Extreme GPU lists 8.294 TFLOPS FP32. These are specification values, not benchmark results.

Q: Which GPU supports more memory and higher bandwidth?

A: The Instinct MI455X records 432 GB of HBM4 memory with 23.3 TB/s bandwidth. The Ryzen Z1 Extreme GPU records 16 GB of LPDDR5 memory with 51.20 GB/s bandwidth.

Q: What are the API support differences between the two?

A: The Instinct MI455X lists DirectX, OpenGL, and Vulkan as N/A. The Ryzen Z1 Extreme GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What is the physical form factor of each part?

A: The Instinct MI455X is an EAM Module with no display outputs and no power connectors listed. The Ryzen Z1 Extreme GPU measures 280 mm by 111 mm by 21 mm and has one USB Type-C display output.

Q: What is the launch MSRP for the Ryzen Z1 Extreme GPU?

A: The database records a launch MSRP of 699 USD for the Ryzen Z1 Extreme GPU. No launch MSRP is listed for the Instinct MI455X.

The Verdict

The database does not contain enough measured performance data to render a definitive verdict. The Instinct MI455X presents specifications that dwarf the Ryzen Z1 Extreme GPU in raw compute, memory capacity, and bandwidth. Its 157.3 TFLOPS FP32, 432 GB HBM4, and 23.3 TB/s bandwidth indicate a purpose-built accelerator for massive parallel workloads. The Ryzen Z1 Extreme GPU, with 8.294 TFLOPS FP32 and 16 GB LPDDR5, is clearly positioned for a different class of work, specifically embedded or handheld console use with its 30 W TDP and 280 mm length.

The Instinct MI455X has no display outputs and no API support, meaning it is not intended for interactive graphics. The Ryzen Z1 Extreme GPU supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and provides a USB Type-C output. For any workload requiring graphics output or standard gaming APIs, the Ryzen Z1 Extreme GPU is the only viable choice between the two. For compute-only workloads that can tolerate the absence of display and standard APIs, the Instinct MI455X offers far higher theoretical throughput. The data supports each part for its respective domain, but no measured performance confirms these expectations.

Specification Differences

The two GPUs differ in nearly every recorded specification. The Instinct MI455X uses a 2 nm process node, while the Ryzen Z1 Extreme GPU uses 4 nm. Transistor counts are 320,000 million versus 25,390 million. Die size is 2990 mm² versus 178 mm². Transistor density is 107.0M per mm² for the Instinct part and 142.6M per mm² for the Ryzen part.

Clock speeds differ substantially. The Instinct MI455X has a base clock of 1000 MHz and a boost clock of 2400 MHz. The Ryzen Z1 Extreme GPU has a base clock of 800 MHz and a boost clock of 2700 MHz. Memory clocks are 1900 MHz (7.6 Gbps effective) for the Instinct part and 800 MHz (6.4 Gbps effective) for the Ryzen part.

Memory configuration differs completely. The Instinct MI455X uses 432 GB of HBM4 on a 24,576-bit bus. The Ryzen Z1 Extreme GPU uses 16 GB of LPDDR5 on a 64-bit bus. Bandwidth is 23.3 TB/s versus 51.20 GB/s. The Instinct part has 32,768 shading units, 1,024 TMUs, and no ROPs. The Ryzen part has 768 shading units, 48 TMUs, and 32 ROPs. The Ryzen part also lists 12 ray tracing cores, whereas the Instinct part lists none.

Pixel rate is 0 MPixel/s for the Instinct MI455X and 86.40 GPixel/s for the Ryzen Z1 Extreme GPU. Texture rate is 2,457.6 GTexel/s versus 129.6 GTexel/s. FP16 throughput is 157.3 TFLOPS (1:1) for the Instinct part and 16.59 TFLOPS (2:1) for the Ryzen part. TDP is 2300 W versus 30 W. The Instinct part uses a PCIe 6.0 x16 interface, while the Ryzen part lists no bus interface. Release dates are July 22, 2026 for the Instinct part and June 12, 2023 for the Ryzen part. The Ryzen part is listed as Active in production status, while the Instinct part has no production status recorded.

Architecture Differences

The Instinct MI455X is built on the CDNA 5.0 architecture, using the MI450 256CU chip. It belongs to the Instinct (MIx) generation. The Ryzen Z1 Extreme GPU is built on the RDNA 3.0 architecture, using the Phoenix chip, and belongs to the Console GPU (AMD) generation. These are fundamentally different architectural families: CDNA is designed for compute acceleration, while RDNA targets graphics rendering.

The process nodes differ, with the Instinct part on TSMC's 2 nm process and the Ryzen part on TSMC's 4 nm process. The transistor density is actually higher on the Ryzen part, at 142.6M per mm², versus 107.0M per mm² for the Instinct part. However, the Instinct part's massive die size of 2990 mm² results in a far larger absolute transistor count of 320,000 million.

The memory architectures are distinct. The Instinct MI455X uses HBM4 with a 24,576-bit bus, which is typical of accelerator-class hardware designed for high-bandwidth access to large datasets. The Ryzen Z1 Extreme GPU uses LPDDR5 on a 64-bit bus, which is appropriate for power-constrained, compact devices. The Instinct part has no ROPs and no ray tracing cores, reinforcing its compute-only orientation. The Ryzen part has 32 ROPs and 12 ray tracing cores, confirming its graphics-focused design.

The Instinct MI455X lists no API support for DirectX, OpenGL, or Vulkan. The Ryzen Z1 Extreme GPU supports all three, including DirectX 12 Ultimate. This indicates the Ryzen part is intended for applications that use standard graphics APIs, while the Instinct part is not. The Instinct part also has no display outputs, while the Ryzen part provides one USB Type-C output. The power envelope differs by a factor of over seventy-six, with the Instinct part consuming 2300 W versus 30 W for the Ryzen part, and the suggested PSU for the Instinct part is 2700 W.

Where Each One Wins

The AMD Instinct MI455X wins in every metric related to raw compute throughput and memory capacity. Its FP32 output of 157.3 TFLOPS is roughly nineteen times higher than the Ryzen Z1 Extreme GPU's 8.294 TFLOPS. Its texture rate of 2,457.6 GTexel/s is nearly nineteen times higher. The 432 GB memory capacity is twenty-seven times larger, and the 23.3 TB/s bandwidth is over 455 times higher. The 32,768 shading units and 1,024 TMUs dwarf the 768 shading units and 48 TMUs of the Ryzen part. For workloads that demand massive parallel compute, such as large-scale matrix operations or data processing, the Instinct part is the clear choice based on specifications.

The AMD Ryzen Z1 Extreme GPU wins in areas where the Instinct part is entirely absent. It has pixel rate of 86.40 GPixel/s, while the Instinct part records 0 MPixel/s. It has 32 ROPs and 12 ray tracing cores, which the Instinct part lacks. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the Instinct part lists N/A for all APIs. It provides a USB Type-C display output, while the Instinct part has no outputs. It operates at 30 W, making it suitable for power-constrained environments, whereas the Instinct part requires 2300 W and a 2700 W suggested PSU. The Ryzen part also has a higher boost clock at 2700 MHz versus 2400 MHz, and a higher transistor density at 142.6M per mm² versus 107.0M per mm².

The Ryzen Z1 Extreme GPU is the only part of the two that can render graphics to a display. Its dimensions of 280 mm by 111 mm by 21 mm and its Active production status indicate it is a shipping product designed for integration into handheld or compact devices. The Instinct MI455X, with its EAM Module form factor and lack of display output, is a compute accelerator with no interactive graphics capability. For any user needing a GPU for gaming, rendering, or standard API-based graphics work, the Ryzen Z1 Extreme GPU is the only option in this comparison. For users needing maximum compute throughput in a server or datacenter context, the Instinct MI455X provides the specifications to handle that role. The data does not show both parts competing for the same tasks; they are complementary components for different segments.