AMD Ryzen Z2 GPU vs NVIDIA H800 PCIe 80 GB Comparison

FAQ

Q: What are the core architectural identities of these two GPUs?

A: The AMD Ryzen Z2 GPU is an RDNA 3.0 part built on TSMC's 4 nm process, using the Hawk Point chip. The NVIDIA H800 PCIe 80 GB is a Hopper architecture part built on TSMC's 5 nm process, using the GH100 chip.

Q: How do the memory subsystems differ?

A: The AMD Ryzen Z2 GPU uses 16 GB of LPDDR5X on a 128-bit bus, delivering 119.9 GB/s of bandwidth. The NVIDIA H800 PCIe 80 GB uses 80 GB of HBM2e on a 5120-bit bus, delivering 2.04 TB/s of bandwidth.

Q: What is the difference in shading unit counts?

A: The AMD Ryzen Z2 GPU has 768 shading units, while the NVIDIA H800 PCIe 80 GB has 14,592 shading units, a 19x difference.

Q: Do both GPUs support ray tracing acceleration hardware?

A: The AMD Ryzen Z2 GPU includes 12 ray tracing cores. The NVIDIA H800 PCIe 80 GB does not list dedicated ray tracing core counts in the database.

Q: What are the power requirements for each?

A: The AMD Ryzen Z2 GPU has a 28 W TDP with no power connectors. The NVIDIA H800 PCIe 80 GB has a 350 W TDP, uses a single 16-pin connector, and lists a suggested power supply of 750 W.

Q: What display outputs does each GPU provide?

A: The AMD Ryzen Z2 GPU provides one USB Type-C display output. The NVIDIA H800 PCIe 80 GB provides no display outputs.

Where Each One Wins

The recorded data shows a complete split between the two products across nearly every measurable category. The AMD Ryzen Z2 GPU wins in the areas of pixel processing, process efficiency, transistor density, and physical footprint. The NVIDIA H800 PCIe 80 GB wins decisively in raw compute throughput, memory capacity, memory bandwidth, texture processing, and interface capabilities.

For pixel rate, the AMD Ryzen Z2 GPU achieves 86.40 GPixel/s versus 42.12 GPixel/s for the NVIDIA H800 PCIe 80 GB. This means the AMD part delivers more than double the pixel throughput, which indicates a design optimized for rasterization-heavy workloads at lower resolutions. The NVIDIA part's lower pixel rate relative to its massive compute resources suggests a different priority: high-density compute rather than display-oriented rendering.

For texture rate, the NVIDIA H800 PCIe 80 GB delivers 800.3 GTexel/s compared to 129.6 GTexel/s for the AMD Ryzen Z2 GPU. This is a 6.2x advantage, driven by 456 texture mapping units against 48. The NVIDIA part also leads in FP32 throughput with 51.22 TFLOPS versus 8.294 TFLOPS, a 6.2x gap. In FP16 compute, the NVIDIA part reaches 204.9 TFLOPS (using a 4:1 ratio) versus 8.294 TFLOPS for AMD, a 24.7x gap, owing to its dedicated tensor cores.

Memory capacity favors the NVIDIA H800 PCIe 80 GB with 80 GB versus 16 GB, a 5x difference. Memory bandwidth favors NVIDIA with 2.04 TB/s versus 119.9 GB/s, a 17x difference. The bus width difference is equally stark: 5120-bit versus 128-bit.

The AMD Ryzen Z2 GPU has the advantage in process node (4 nm versus 5 nm) and transistor density (142.6M per mm² versus 98.3M per mm²). It also has a much smaller die at 178 mm² versus 814 mm². The AMD part supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, whereas the NVIDIA H800 PCIe 80 GB lists no API support in the database.

Architecture Differences

The AMD Ryzen Z2 GPU uses the Hawk Point chip, which is part of the RDNA 3.0 architecture. It is classified as a Console GPU generation. The NVIDIA H800 PCIe 80 GB uses the GH100 chip, part of the Hopper architecture, classified as Server Hopper (Hxx). These are fundamentally different design philosophies: one targets integrated, low-power console-class rendering; the other targets high-throughput server compute.

The manufacturing processes differ. The AMD part uses TSMC's 4 nm node, while the NVIDIA part uses TSMC's 5 nm node. The transistor counts diverge sharply: the AMD Ryzen Z2 GPU contains 25,390 million transistors on a 178 mm² die, yielding a density of 142.6M per mm². The NVIDIA H800 PCIe 80 GB contains 80,000 million transistors on an 814 mm² die, yielding a density of 98.3M per mm². The AMD part achieves higher transistor density despite having far fewer total transistors.

Ray tracing support also differs. The AMD Ryzen Z2 GPU includes 12 ray tracing cores. The NVIDIA H800 PCIe 80 GB does not report ray tracing core counts, but it includes 456 tensor cores, which the AMD part does not have. This indicates the NVIDIA part is built for matrix and AI workloads, while the AMD part focuses on conventional graphics pipelines with ray tracing acceleration.

Memory architecture diverges completely. The AMD Ryzen Z2 GPU uses LPDDR5X with a 128-bit interface, a configuration typical of integrated or compact designs. The NVIDIA H800 PCIe 80 GB uses HBM2e with a 5120-bit interface, a configuration designed for massive bandwidth in server environments. The memory clocks reflect this: the AMD part runs at 937 MHz (7.5 Gbps effective), while the NVIDIA part runs at 1593 MHz (3.2 Gbps effective).

The form factors differ as well. The NVIDIA H800 PCIe 80 GB is a dual-slot card measuring 268 mm in length and 111 mm in height, with a PCIe 5.0 x16 bus interface and a single 16-pin power connector. The AMD Ryzen Z2 GPU has no listed dimensions, slot width, or bus interface, and uses no power connectors, consistent with an embedded or mobile-class component.

Specification Differences

| Specification | AMD Ryzen Z2 GPU | NVIDIA H800 PCIe 80 GB |

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

| Process node | 4 nm | 5 nm |

| Transistors | 25,390 million | 80,000 million |

| Die size | 178 mm² | 814 mm² |

| Transistor density | 142.6M / mm² | 98.3M / mm² |

| Base clock | 800 MHz | 1095 MHz |

| Boost clock | 2700 MHz | 1755 MHz |

| Memory clock | 937 MHz (7.5 Gbps effective) | 1593 MHz (3.2 Gbps effective) |

| Memory size | 16 GB | 80 GB |

| Memory type | LPDDR5X | HBM2e |

| Memory bus width | 128 bit | 5120 bit |

| Memory bandwidth | 119.9 GB/s | 2.04 TB/s |

| Shading units | 768 | 14,592 |

| TMUs | 48 | 456 |

| ROPs | 32 | 24 |

| RT cores | 12 | None listed |

| Tensor cores | None listed | 456 |

| Pixel rate | 86.40 GPixel/s | 42.12 GPixel/s |

| Texture rate | 129.6 GTexel/s | 800.3 GTexel/s |

| FP32 | 8.294 TFLOPS | 51.22 TFLOPS |

| FP16 | 8.294 TFLOPS (1:1) | 204.9 TFLOPS (4:1) |

| TDP | 28 W | 350 W |

| Power connectors | None | 1x 16-pin |

| Suggested PSU | None listed | 750 W |

| Bus interface | None listed | PCIe 5.0 x16 |

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

| API support | DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4 | None listed |

Head-to-Head Benchmarks

The database contains no direct benchmark scores for either GPU, but the recorded specification data allows for direct computational comparisons across key metrics.

The largest single advantage for the NVIDIA H800 PCIe 80 GB appears in FP16 throughput. The NVIDIA part delivers 204.9 TFLOPS against 8.294 TFLOPS for the AMD Ryzen Z2 GPU, a 24.7x margin. This stems from the NVIDIA part's 4:1 FP16 ratio and its 456 tensor cores, which enable accelerated half-precision and matrix operations. The AMD part runs FP16 at a 1:1 ratio with FP32.

Memory bandwidth shows the next largest gap. The NVIDIA H800 PCIe 80 GB provides 2.04 TB/s versus 119.9 GB/s for the AMD Ryzen Z2 GPU, a 17x difference. The 5120-bit bus and HBM2e memory are the primary contributors. This bandwidth advantage directly supports the NVIDIA part's large compute throughput and its 80 GB capacity.

Shading unit count favors the NVIDIA part by 19x (14,592 versus 768). Texture rate favors the NVIDIA part by 6.2x (800.3 GTexel/s versus 129.6 GTexel/s). FP32 throughput also favors the NVIDIA part by 6.2x (51.22 TFLOPS versus 8.294 TFLOPS). These three metrics are consistent with each other, indicating that the NVIDIA part scales its compute resources proportionally.

The AMD Ryzen Z2 GPU holds a 2.05x advantage in pixel rate (86.40 GPixel/s versus 42.12 GPixel/s). Its 32 ROPs versus 24 ROPs on the NVIDIA part, combined with a higher boost clock of 2700 MHz against 1755 MHz, explains this result. The AMD part also has a higher transistor density (142.6M per mm² versus 98.3M per mm²) and a smaller die (178 mm² versus 814 mm²).

The NVIDIA H800 PCIe 80 GB has a higher base clock (1095 MHz versus 800 MHz), but the AMD Ryzen Z2 GPU has a higher boost clock (2700 MHz versus 1755 MHz). The AMD part's boost clock is 54% higher than its base clock, while the NVIDIA part's boost clock is only 60% higher than its base clock, showing different clock management strategies.

Power consumption differs by an order of magnitude: 28 W for the AMD Ryzen Z2 GPU versus 350 W for the NVIDIA H800 PCIe 80 GB. The AMD part achieves its pixel rate advantage with 12.5x less power, while the NVIDIA part achieves its compute advantages with significantly higher power draw, a 16-pin connector, and a 750 W suggested power supply.

The release dates place the NVIDIA H800 PCIe 80 GB in March 2023 and the AMD Ryzen Z2 GPU in December 2024. The NVIDIA part lists a predecessor (Server Ada) and a successor (Server Blackwell), while the AMD part lists neither. Both parts remain in active production status.