AMD Instinct MI325X vs AMD Ryzen Z1 GPU Comparison

Where Each One Wins

The AMD Instinct MI325X and AMD Ryzen Z1 GPU occupy completely separate corners of the GPU landscape, and the division of wins reflects that separation clearly. The MI325X is a compute-oriented accelerator with no display outputs, no gaming API support, and a massive memory subsystem built for data-center workloads. The Ryzen Z1 GPU, by contrast, is a compact integrated graphics solution with full DirectX 12 Ultimate and Vulkan 1.4 support, designed for embedded and mobile form factors.

The MI325X wins on raw compute throughput, memory capacity, memory bandwidth, and texture throughput. Its FP32 output of 81.72 TFLOPS dwarfs the Ryzen Z1 GPU's 2.560 TFLOPS by a factor of roughly 32. The MI325X also carries 256 GB of HBM3e memory versus 16 GB of LPDDR5 on the Ryzen Z1 GPU, and its 6.14 TB/s memory bandwidth is roughly 120 times higher than the Z1's 51.20 GB/s. Texture rate follows the same pattern: 2,553.6 GTexel/s against 40.00 GTexel/s.

The Ryzen Z1 GPU wins on clock speeds, process efficiency, API compatibility, and physical practicality. Its base clock of 1500 MHz and boost clock of 2500 MHz both exceed the MI325X's 1000 MHz base and 2100 MHz boost. The Z1 GPU runs on a 4 nm process node versus the MI325X's 5 nm node, and it draws 30 W compared to 1000 W. The Z1 GPU also supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI325X lists N/A for all three APIs. The Ryzen Z1 GPU has an active production status, whereas the MI325X's production status is not recorded.

The data shows a clear use-case split: the MI325X exists for massive parallel compute workloads that need enormous memory capacity and bandwidth, while the Ryzen Z1 GPU targets conventional graphics rendering and interactive applications in power-constrained environments.

Architecture Differences

The two GPUs come from different architectural families within AMD's lineup. The MI325X uses CDNA 3.0, AMD's compute-focused architecture, built on the Aqua Vanjaram chip. The Ryzen Z1 GPU uses RDNA 3.0, the gaming-oriented architecture, built on the Phoenix chip. This fundamental divergence explains nearly every difference in their specifications.

The process nodes differ: the MI325X is fabricated on a 5 nm process at TSMC, while the Ryzen Z1 GPU uses a 4 nm process, also at TSMC. The transistor counts reflect their vastly different scales. The MI325X packs 153,000 million transistors across a 1017 mm² die, yielding a transistor density of 150.4 million per square millimeter. The Ryzen Z1 GPU contains 25,390 million transistors on a 178 mm² die, with a density of 142.6 million per square millimeter. The MI325X's die is nearly six times larger and holds roughly six times more transistors.

Shader core counts diverge dramatically. The MI325X has 19,456 shading units and 1,216 texture mapping units, while the Ryzen Z1 GPU has 256 shading units and 16 TMUs. The MI325X has zero ROPs and zero ray tracing cores, with its pixel rate recorded as 0 MPixel/s. The Ryzen Z1 GPU has 8 ROPs and 4 ray tracing cores, delivering a pixel rate of 20.00 GPixel/s. This difference is structural: the CDNA architecture prioritizes compute throughput over rasterization, while RDNA 3.0 includes dedicated ray tracing hardware and traditional graphics pipeline stages.

Memory architectures are entirely different. The MI325X uses HBM3e on an 8192-bit bus, whereas the Ryzen Z1 GPU uses LPDDR5 on a 64-bit bus. The MI325X's memory clock is listed as 1500 MHz with 6 Gbps effective speed, while the Z1 GPU's memory runs at 800 MHz with 6.4 Gbps effective. The bus width difference is the dominant factor in their bandwidth gap.

The MI325X uses an OAM Module slot width with no power connectors and no display outputs. The Ryzen Z1 GPU has no slot width recorded, also has no power connectors and no display outputs, but it does have physical dimensions: 280 mm length, 111 mm height, and 21 mm width. The MI325X's dimensions are not recorded.

Head-to-Head Benchmarks

No direct benchmark results exist in the database for this pairing, so the comparison rests entirely on specification-level analysis. The recorded data shows zero wins for either side in head-to-head benchmark tests, which is consistent with their completely different target markets.

The FP32 compute gap is the most striking difference. The MI325X delivers 81.72 TFLOPS, which is approximately 31.9 times the Ryzen Z1 GPU's 2.560 TFLOPS. In FP16, the relationship changes: the MI325X maintains 81.72 TFLOPS with a 1:1 ratio, while the Ryzen Z1 GPU doubles to 5.120 TFLOPS with a 2:1 ratio. Even with that doubling, the MI325X still delivers roughly 16 times the FP16 throughput.

Memory bandwidth comparisons are even more lopsided. The MI325X's 6.14 TB/s against the Ryzen Z1 GPU's 51.20 GB/s represents a factor of approximately 120. This bandwidth advantage directly enables the MI325X to feed its massive compute array, while the Z1 GPU's narrow 64-bit bus limits its memory-bound workloads.

Texture throughput favors the MI325X by a factor of roughly 64: 2,553.6 GTexel/s versus 40.00 GTexel/s. Pixel rate, however, goes the other way. The MI325X records 0 MPixel/s, while the Ryzen Z1 GPU delivers 20.00 GPixel/s. This reflects the absence of ROPs on the MI325X, which cannot rasterize in the conventional sense.

Clock speeds favor the Ryzen Z1 GPU. Its base clock of 1500 MHz is 50% higher than the MI325X's 1000 MHz, and its boost clock of 2500 MHz is about 19% higher than 2100 MHz. The Z1 GPU achieves these higher clocks while consuming only 30 W, compared to the MI325X's 1000 W TDP.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI325X delivers 81.72 TFLOPS, which is roughly 32 times the Ryzen Z1 GPU's 2.560 TFLOPS.

Q: How do their memory capacities compare?

A: The MI325X has 256 GB of HBM3e memory, while the Ryzen Z1 GPU has 16 GB of LPDDR5. The MI325X's memory bandwidth of 6.14 TB/s is approximately 120 times the Z1 GPU's 51.20 GB/s.

Q: Which GPU supports modern graphics APIs?

A: The Ryzen Z1 GPU supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. The MI325X lists N/A for DirectX, OpenGL, and Vulkan, indicating no graphics API support.

Q: What are the power requirements for each GPU?

A: The MI325X has a TDP of 1000 W with a suggested PSU of 1400 W. The Ryzen Z1 GPU has a TDP of 30 W with no suggested PSU recorded.

Q: Do either of these GPUs have display outputs?

A: Neither GPU has display outputs recorded. Both list "No outputs" in the database.

Q: What process nodes do they use?

A: The MI325X uses a 5 nm process at TSMC, while the Ryzen Z1 GPU uses a 4 nm process, also at TSMC.

Specification Differences

| Specification | AMD Instinct MI325X | AMD Ryzen Z1 GPU |

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

| Architecture | CDNA 3.0 | RDNA 3.0 |

| Chip | Aqua Vanjaram | Phoenix |

| Process Node | 5 nm | 4 nm |

| Transistors | 153,000 million | 25,390 million |

| Die Size | 1017 mm² | 178 mm² |

| Transistor Density | 150.4M / mm² | 142.6M / mm² |

| Base Clock | 1000 MHz | 1500 MHz |

| Boost Clock | 2100 MHz | 2500 MHz |

| Memory Clock | 1500 MHz, 6 Gbps effective | 800 MHz, 6.4 Gbps effective |

| Memory Size | 256 GB | 16 GB |

| Memory Type | HBM3e | LPDDR5 |

| Memory Bus Width | 8192 bit | 64 bit |

| Memory Bandwidth | 6.14 TB/s | 51.20 GB/s |

| Shading Units | 19,456 | 256 |

| TMUs | 1,216 | 16 |

| ROPs | 0 | 8 |

| Ray Tracing Cores | None recorded | 4 |

| Pixel Rate | 0 MPixel/s | 20.00 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 40.00 GTexel/s |

| FP32 | 81.72 TFLOPS | 2.560 TFLOPS |

| FP16 | 81.72 TFLOPS (1:1) | 5.120 TFLOPS (2:1) |

| TDP | 1000 W | 30 W |

| Slot Width | OAM Module | Not recorded |

| Suggested PSU | 1400 W | Not recorded |

| Bus Interface | PCIe 5.0 x16 | Not recorded |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | Not recorded | 280 mm length, 111 mm height, 21 mm width |

| Production Status | Not recorded | Active |

| Release Date | 2024-10-09 | 2023-09-17 |

| Launch MSRP | Not recorded | 599 USD |

The Verdict

The recorded data points to two entirely different purchasing decisions based on workload requirements. The AMD Instinct MI325X is built for compute-heavy environments where memory capacity, bandwidth, and raw FP32 throughput are the dominant constraints. Its 256 GB HBM3e pool, 8192-bit bus, and 81.72 TFLOPS FP32 output make it suitable for large-scale data processing, AI training, and scientific simulation workloads that can tolerate 1000 W power draw and require no display output. The absence of graphics API support and ROPs confirms this is not a rendering product.

The AMD Ryzen Z1 GPU, with its 30 W TDP, 4 nm process, and full DirectX 12 Ultimate support, fits into compact systems where power efficiency and graphics API compatibility matter more than absolute compute throughput. Its 2500 MHz boost clock, 16 GB LPDDR5 memory, and 4 ray tracing cores indicate a focus on conventional graphics rendering and interactive workloads in constrained thermal envelopes. The active production status and recorded physical dimensions suggest it is currently available for integration into shipping products.

The data shows no overlap in their target applications. The MI325X's 0 MPixel/s pixel rate and N/A API support make it unsuitable for any graphics rendering task, while the Ryzen Z1 GPU's 2.560 TFLOPS FP32 output and 51.20 GB/s bandwidth would be inadequate for the MI325X's intended data-center workloads. The choice between them is determined entirely by the workload: massive parallel compute with enormous memory demands points to the MI325X, while power-efficient, API-complete graphics processing points to the Ryzen Z1 GPU.