AMD Instinct MI355X vs AMD Ryzen Z1 Extreme GPU Comparison

Head-to-Head Benchmarks

The recorded database contains no head-to-head benchmark entries for the AMD Instinct MI355X and the AMD Ryzen Z1 Extreme GPU. Both parts carry an average benchmark score of 0, and each sits at the 50th percentile against all GPUs in the database. With zero comparative measurements, no direct performance deltas can be calculated between the two accelerators.

The absence of benchmark data is itself informative. The Instinct MI355X targets a completely different operational envelope than the Ryzen Z1 Extreme GPU, and the database reflects that split by not producing any shared test results. The MI355X reports an FP32 throughput of 78.64 TFLOPS and an FP16 throughput of 78.64 TFLOPS on a 1:1 ratio. The Ryzen Z1 Extreme GPU reports 8.294 TFLOPS for FP32 and 16.59 TFLOPS for FP16 on a 2:1 ratio. These figures indicate a 9.48x difference in FP32 compute and a 4.74x difference in FP16 compute, both favoring the Instinct part, though these are architectural specifications rather than measured benchmark outcomes.

The Instinct MI355X also delivers a texture rate of 2,457.6 GTexel/s compared to 129.6 GTexel/s for the Ryzen Z1 Extreme GPU, a 18.96x gap. The pixel rate comparison runs in the opposite direction: the MI355X records 0 MPixel/s while the Ryzen Z1 Extreme GPU records 86.40 GPixel/s. This reflects the MI355X having no ROPs and no display outputs, whereas the Ryzen Z1 Extreme GPU includes 32 ROPs and a USB Type-C display output.

Memory bandwidth shows the largest recorded disparity. The MI355X accesses 288 GB of HBM3e over an 8192-bit bus, yielding 8.19 TB/s. The Ryzen Z1 Extreme GPU accesses 16 GB of LPDDR5 over a 64-bit bus, yielding 51.20 GB/s. The bandwidth ratio is 160x in favor of the Instinct MI355X. Memory capacity differs by 18x, and bus width differs by 128x.

The Verdict

The data supports only one selection logic: these are not competing products. The Instinct MI355X is a compute accelerator with a 1400 W TDP, an OAM module form factor, no display outputs, and no API support listed for DirectX, OpenGL, or Vulkan. The Ryzen Z1 Extreme GPU is a 30 W integrated graphics solution with DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 support, plus a display output.

For any workload requiring rasterization, display output, or graphics API compatibility, the Ryzen Z1 Extreme GPU is the only viable option in this pairing. For any workload requiring extremely high FP32 or FP16 throughput, very large memory capacity, or very high memory bandwidth, the Instinct MI355X is the only viable option.

The Ryzen Z1 Extreme GPU has a launch MSRP of 699 USD. The Instinct MI355X has no launch MSRP recorded in the database.

The power envelope difference is substantial. The Instinct MI355X lists a 1400 W TDP and suggests a 1800 W power supply. The Ryzen Z1 Extreme GPU lists a 30 W TDP and no suggested PSU. The ratio is 46.67x in TDP.

Where Each One Wins

The Instinct MI355X wins on every compute-oriented specification recorded in the database. It delivers 78.64 TFLOPS FP32 versus 8.294 TFLOPS, 78.64 TFLOPS FP16 versus 16.59 TFLOPS, 2,457.6 GTexel/s versus 129.6 GTexel/s, 8.19 TB/s memory bandwidth versus 51.20 GB/s, 288 GB memory capacity versus 16 GB, 16384 shading units versus 768, 1024 TMUs versus 48, and an 8192-bit memory bus versus 64-bit. It also uses a 3 nm process node from TSMC with 185,000 million transistors on a 2380 mm² die, compared to the Ryzen Z1 Extreme GPU's 4 nm node, 25,390 million transistors, and 178 mm² die.

The Ryzen Z1 Extreme GPU wins on every graphics-oriented specification recorded in the database. It delivers 86.40 GPixel/s pixel rate versus 0 MPixel/s, includes 32 ROPs versus 0, includes 12 ray tracing cores versus none listed, supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 versus N/A for all three, and provides a USB Type-C display output versus no outputs. It also operates at 30 W versus 1400 W, and its boost clock of 2700 MHz exceeds the MI355X's 2400 MHz.

The Ryzen Z1 Extreme GPU also holds an advantage in transistor density. Its 142.6M transistors per mm² exceeds the MI355X's 77.7M per mm², indicating a denser packing on its smaller die.

FAQ

Q: Which GPU has higher FP32 compute?

A: The AMD Instinct MI355X records 78.64 TFLOPS FP32, which is 9.48x higher than the 8.294 TFLOPS recorded for the AMD Ryzen Z1 Extreme GPU.

Q: Which GPU supports display outputs?

A: The AMD Ryzen Z1 Extreme GPU provides 1x USB Type-C output. The AMD Instinct MI355X lists no display outputs.

Q: What memory types do these GPUs use?

A: The AMD Instinct MI355X uses 288 GB of HBM3e. The AMD Ryzen Z1 Extreme GPU uses 16 GB of LPDDR5.

Q: Do both GPUs support the same graphics APIs?

A: No. The AMD Ryzen Z1 Extreme GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The AMD Instinct MI355X lists N/A for DirectX, OpenGL, and Vulkan.

Q: What are the TDP values for each GPU?

A: The AMD Instinct MI355X has a 1400 W TDP with a suggested PSU of 1800 W. The AMD Ryzen Z1 Extreme GPU has a 30 W TDP with no suggested PSU listed.

Q: Which GPU has ray tracing cores?

A: The AMD Ryzen Z1 Extreme GPU includes 12 ray tracing cores. The AMD Instinct MI355X lists no ray tracing cores.

Architecture Differences

The two parts come from different AMD architectures. The Instinct MI355X uses CDNA 4.0 with the MI350 256CU chip, and belongs to the Instinct (MIx) generation. The Ryzen Z1 Extreme GPU uses RDNA 3.0 with the Phoenix chip, and belongs to the Console GPU (AMD) generation.

Process technology differs by one node step. The Instinct MI355X is fabricated on a 3 nm process at TSMC, while the Ryzen Z1 Extreme GPU uses a 4 nm process at the same foundry. Transistor counts reflect the scale difference: 185,000 million for the MI355X versus 25,390 million for the Ryzen Z1 Extreme GPU. Die size measures 2380 mm² for the MI355X versus 178 mm² for the Ryzen Z1 Extreme GPU.

Compute resource allocation differs sharply. The Instinct MI355X contains 16384 shading units and 1024 TMUs, with 0 ROPs. The Ryzen Z1 Extreme GPU contains 768 shading units, 48 TMUs, and 32 ROPs. The MI355X lists no ray tracing cores, while the Ryzen Z1 Extreme GPU includes 12.

Memory architecture is fundamentally different. The MI355X uses 288 GB of HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth and a memory clock of 2000 MHz (8 Gbps effective). The Ryzen Z1 Extreme GPU uses 16 GB of LPDDR5 on a 64-bit bus with 51.20 GB/s bandwidth and a memory clock of 800 MHz (6.4 Gbps effective).

Clock behavior also diverges. The MI355X has a 1000 MHz base clock and 2400 MHz boost. The Ryzen Z1 Extreme GPU has an 800 MHz base clock and 2700 MHz boost. The Ryzen Z1 Extreme GPU therefore has a 300 MHz higher boost clock, despite its much lower power budget.

Power delivery and physical format are unrelated. The MI355X is an OAM module with no power connectors listed, a 1400 W TDP, a suggested 1800 W PSU, dimensions of 102 mm by 165 mm, and a PCIe 5.0 x16 bus interface. The Ryzen Z1 Extreme GPU has no slot width, no power connectors, no suggested PSU, no bus interface listed, dimensions of 280 mm by 111 mm by 21 mm, and a production status of Active.

Feature support is mutually exclusive. The MI355X lists N/A for DirectX, OpenGL, and Vulkan, and has no display outputs. The Ryzen Z1 Extreme GPU lists DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, plus one USB Type-C display output. The release dates are separated by approximately two years: the MI355X released on 2025-06-11, and the Ryzen Z1 Extreme GPU released on 2023-06-12.