AMD Radeon Instinct MI308X vs AMD Ryzen Z2 A GPU Comparison

Head-to-Head Benchmarks

The recorded database contains no direct head-to-head benchmark scores for the AMD Radeon Instinct MI308X and the AMD Ryzen Z2 A GPU. Both products have an average benchmark score of 0 and a percentile rank of 50 among all GPUs tracked in the database. With zero wins recorded for either side, there are no benchmark deltas to report. The absence of comparative data means the analysis must rely entirely on the architectural specifications and performance indicators recorded for each part.

The MI308X delivers 81.72 TFLOPS of FP32 compute and 653.7 TFLOPS of FP16 compute with an 8:1 ratio. The Ryzen Z2 A GPU produces 1.638 TFLOPS FP32 and 3.277 TFLOPS FP16 with a 2:1 ratio. These figures place the MI308X at approximately 49.9 times the FP32 throughput of the Ryzen Z2 A GPU, a gap that reflects their entirely different design targets. The texture rate tells a similar story: the MI308X reaches 2,553.6 GTexel/s versus 51.20 GTexel/s for the Ryzen Z2 A GPU, a 49.9x difference. Pixel rate, however, flips the comparison in the other direction. The MI308X records 0 MPixel/s because it has zero ROPs, while the Ryzen Z2 A GPU manages 25.60 GPixel/s from its 16 ROPs.

Architecture Differences

The two GPUs come from different architectural generations and process nodes. The MI308X uses CDNA 3.0 architecture on a 5 nm TSMC process with the Aqua Vanjaram chip. The Ryzen Z2 A GPU uses RDNA 2.0 architecture on a 7 nm TSMC process with the Van Gogh chip. Transistor counts differ enormously: the MI308X packs 153,000 million transistors across a 1017 mm² die, yielding a transistor density of 150.4M per mm². The Ryzen Z2 A GPU integrates 2,400 million transistors on a 163 mm² die, for a density of 14.7M per mm². The MI308X die is roughly 6.2 times larger in area and contains 63.75 times more transistors.

Memory subsystems are equally divergent. The MI308X uses 192 GB of HBM3 memory on an 8192-bit bus, achieving 10.3 TB/s of bandwidth. The Ryzen Z2 A GPU uses 16 GB of LPDDR5 memory on a 128-bit bus, delivering 102.4 GB/s. The MI308X memory bus is 64 times wider, and its bandwidth is approximately 100.6 times higher. Clock speeds show a narrower gap: both start at 1000 MHz base, but the MI308X boosts to 2100 MHz while the Ryzen Z2 A GPU boosts to 1600 MHz. Memory clocks differ as well, with the MI308X running at 2525 MHz (10.1 Gbps effective) versus 800 MHz (6.4 Gbps effective) for the Ryzen Z2 A GPU.

Compute unit configurations reflect the architectural split. The MI308X has 19,456 shading units, 1,216 TMUs, and zero ROPs, with no recorded ray tracing cores. The Ryzen Z2 A GPU has 512 shading units, 32 TMUs, 16 ROPs, and 8 ray tracing cores. The MI308X is a pure compute accelerator with no display outputs, while the Ryzen Z2 A GPU includes a single USB Type-C output and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI308X lists no API support in the database.

Power and physical specifications differ as expected. The MI308X has a 750 W TDP with no power connectors and a suggested PSU of 1150 W, occupying an OAM Module slot width. The Ryzen Z2 A GPU has a 15 W TDP, no recorded slot width or power connector data, and no suggested PSU. The MI308X connects via PCIe 5.0 x16, while the Ryzen Z2 A GPU has no recorded bus interface.

Release timing shows the MI308X launched on 2023-12-05, with the Ryzen Z2 A GPU following on 2024-12-31. The MI308X predecessor is listed as FirePro Data Center, while the Ryzen Z2 A GPU has no recorded predecessor. The Ryzen Z2 A GPU remains in active production; the MI308X production status is not recorded.

Where Each One Wins

The data supports a clear functional split. The MI308X wins decisively in raw compute throughput, memory capacity, memory bandwidth, and texture processing. Its 192 GB HBM3 pool with 10.3 TB/s bandwidth is built for large-scale data residency, while its 81.72 TFLOPS FP32 and 653.7 TFLOPS FP16 rates target dense numerical workloads. The 1,216 TMUs enable texture-heavy processing at 2,553.6 GTexel/s, far beyond anything the Ryzen Z2 A GPU can approach.

The Ryzen Z2 A GPU wins in areas the MI308X does not address at all. It has 16 ROPs and a 25.60 GPixel/s pixel rate, whereas the MI308X records 0 MPixel/s with zero ROPs. The Ryzen Z2 A GPU includes 8 ray tracing cores, which the MI308X lacks entirely. It also supports modern graphics APIs (DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4) and has a display output via USB Type-C, making it suitable for rendering to a screen. The MI308X has no display outputs and no recorded API compatibility.

Power efficiency heavily favors the Ryzen Z2 A GPU. It delivers its 1.638 TFLOPS FP32 within a 15 W TDP, while the MI308X consumes 750 W for its 81.72 TFLOPS. Normalizing for power, the Ryzen Z2 A GPU produces approximately 0.109 TFLOPS per watt, while the MI308X produces 0.109 TFLOPS per watt as well. The two parts achieve identical compute density per watt, despite the massive absolute performance difference. The Ryzen Z2 A GPU is the only one of the two with a confirmed active production status.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The MI308X delivers 81.72 TFLOPS FP32, which is approximately 49.9 times the 1.638 TFLOPS of the Ryzen Z2 A GPU.

Q: How do the memory bandwidth figures compare?

A: The MI308X provides 10.3 TB/s bandwidth from 192 GB of HBM3 on an 8192-bit bus. The Ryzen Z2 A GPU offers 102.4 GB/s from 16 GB of LPDDR5 on a 128-bit bus. The MI308X bandwidth is about 100.6 times higher.

Q: Does either GPU support ray tracing?

A: The Ryzen Z2 A GPU includes 8 ray tracing cores. The MI308X has no recorded ray tracing cores.

Q: What display outputs does each GPU have?

A: The MI308X has no display outputs. The Ryzen Z2 A GPU has one USB Type-C output.

Q: What are the power consumption figures?

A: The MI308X has a 750 W TDP with a suggested PSU of 1150 W. The Ryzen Z2 A GPU has a 15 W TDP and no suggested PSU recorded.

Q: Which GPU has a larger memory capacity?

A: The MI308X has 192 GB of HBM3, while the Ryzen Z2 A GPU has 16 GB of LPDDR5. The MI308X capacity is 12 times larger.

The Verdict

The recorded data describes two products with no overlapping use cases. The MI308X is a data center compute accelerator: no display outputs, no graphics API support, zero ROPs, and no ray tracing hardware. Its 192 GB memory, 10.3 TB/s bandwidth, and 653.7 TFLOPS FP16 throughput point to workloads involving massive datasets and dense matrix operations. The 750 W TDP and OAM Module form factor confirm a server-oriented design.

The Ryzen Z2 A GPU is a low-power graphics processor: 15 W TDP, 16 ROPs, 8 ray tracing cores, a USB Type-C display output, and full support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. Its 16 GB LPDDR5 memory and 102.4 GB/s bandwidth suit framebuffer and texture storage for rendering, not large-scale compute. The active production status and later release date (2024-12-31 versus 2023-12-05) suggest it remains a current product.

A user needing maximum FP32 or FP16 throughput, large memory capacity, or extreme memory bandwidth should select the MI308X. A user needing rasterization, ray tracing, API compatibility, or a display output should select the Ryzen Z2 A GPU. There is no scenario in the data where either part substitutes for the other. The MI308X cannot output video, and the Ryzen Z2 A GPU cannot approach the MI308X compute rates. The choice is determined entirely by workload requirements.

Specification Differences

| Specification | AMD Radeon Instinct MI308X | AMD Ryzen Z2 A GPU |

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

| Architecture | CDNA 3.0 | RDNA 2.0 |

| Process Node | 5 nm | 7 nm |

| Transistors | 153,000 million | 2,400 million |

| Die Size | 1017 mm² | 163 mm² |

| Transistor Density | 150.4M / mm² | 14.7M / mm² |

| Base Clock | 1000 MHz | 1000 MHz |

| Boost Clock | 2100 MHz | 1600 MHz |

| Memory Clock | 2525 MHz, 10.1 Gbps effective | 800 MHz, 6.4 Gbps effective |

| Memory Size | 192 GB | 16 GB |

| Memory Type | HBM3 | LPDDR5 |

| Memory Bus Width | 8192 bit | 128 bit |

| Memory Bandwidth | 10.3 TB/s | 102.4 GB/s |

| Shading Units | 19,456 | 512 |

| TMUs | 1,216 | 32 |

| ROPs | 0 | 16 |

| Ray Tracing Cores | Not recorded | 8 |

| Pixel Rate | 0 MPixel/s | 25.60 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 51.20 GTexel/s |

| FP32 Performance | 81.72 TFLOPS | 1.638 TFLOPS |

| FP16 Performance | 653.7 TFLOPS (8:1) | 3.277 TFLOPS (2:1) |

| TDP | 750 W | 15 W |

| Slot Width | OAM Module | Not recorded |

| Power Connectors | None | Not recorded |

| Suggested PSU | 1150 W | Not recorded |

| Bus Interface | PCIe 5.0 x16 | Not recorded |

| Display Outputs | No outputs | 1x USB Type-C |

| DirectX Support | Not recorded | 12 Ultimate (12_2) |

| OpenGL Support | Not recorded | 4.6 |

| Vulkan Support | Not recorded | 1.4 |

| Release Date | 2023-12-05 | 2024-12-31 |

| Production Status | Not recorded | Active |