AMD Ryzen Z2 GPU vs NVIDIA H800 SXM5 Comparison

The Verdict

The AMD Ryzen Z2 GPU and NVIDIA H800 SXM5 occupy entirely different segments of the hardware spectrum, and the recorded data reflects that divide clearly. The NVIDIA H800 SXM5 is the dominant compute solution for server workloads, delivering 59.30 TFLOPS FP32 performance, 237.2 TFLOPS FP16 (4:1), and 3.36 TB/s memory bandwidth. The AMD Ryzen Z2 GPU, by contrast, is a 28 W console-class part with 8.294 TFLOPS FP32, 16 GB of LPDDR5X memory, and 119.9 GB/s bandwidth. Neither product competes with the other in any meaningful benchmark scenario.

The data indicates that the H800 SXM5 is the correct choice for datacenter deployments, AI training, and high-throughput scientific computing. Its 80 GB HBM3 memory, 528 tensor cores, and 528 TMUs position it as a server accelerator with massive parallel throughput. The Ryzen Z2 GPU, with its 12 RT cores, 768 shading units, and 32 ROPs, is built for portable or embedded gaming-class rendering, and it includes display output via USB Type-C, which the H800 completely lacks.

Benchmark results, as recorded in the database, show no head-to-head wins for either part because no shared workload exists between a 28 W integrated-style GPU and a 700 W SXM server module. The percentile data places both at the 50th percentile against all GPUs, but that metric is based on an average benchmark score of zero for both, meaning the database has no recorded performance samples for either product. The verdict is straightforward: pick the H800 SXM5 for compute density and memory capacity, pick the Ryzen Z2 GPU for low-power rendering with display connectivity.

Where Each One Wins

The AMD Ryzen Z2 GPU wins in power efficiency and physical integration. Its 28 W TDP requires no power connectors, and its 4 nm TSMC process node packs 25,390 million transistors into a 178 mm² die. The H800 SXM5 demands 700 W, uses an 8-pin EPS connector, and suggests a 1100 W power supply. The Ryzen Z2 also provides a display output (1x USB Type-C), while the H800 has no outputs at all, making the AMD part the only option for systems that need to drive a screen.

The NVIDIA H800 SXM5 wins in raw throughput and memory capacity. Its FP32 rate of 59.30 TFLOPS is 7.1 times higher than the Ryzen Z2's 8.294 TFLOPS. Its FP16 rate of 237.2 TFLOPS (4:1) exceeds the Ryzen Z2's 8.294 TFLOPS (1:1) by a factor of 28.6. Memory bandwidth tells a similar story: 3.36 TB/s versus 119.9 GB/s, a 28.0 times advantage. The H800 also has 80 GB of HBM3 memory versus 16 GB of LPDDR5X, and 16,896 shading units versus 768.

The H800's texture rate of 926.6 GTexel/s dwarfs the Ryzen Z2's 129.6 GTexel/s, while the Ryzen Z2's pixel rate of 86.40 GPixel/s exceeds the H800's 42.12 GPixel/s. That pixel-rate advantage suggests the Ryzen Z2 is tuned for rasterization-style output, while the H800 prioritizes texture and compute workloads.

Architecture Differences

The AMD Ryzen Z2 GPU uses the RDNA 3.0 architecture on a Hawk Point chip, manufactured on TSMC's 4 nm process. The NVIDIA H800 SXM5 uses the Hopper architecture on a GH100 chip, manufactured on TSMC's 5 nm process. The transistor counts differ substantially: 25,390 million for AMD versus 80,000 million for NVIDIA. Die sizes are 178 mm² and 814 mm² respectively, giving transistor densities of 142.6 million per mm² for AMD and 98.3 million per mm² for NVIDIA.

Memory subsystems are fundamentally different. The Ryzen Z2 uses 16 GB of LPDDR5X on a 128-bit bus, running at 937 MHz with 7.5 Gbps effective speed. The H800 uses 80 GB of HBM3 on a 5120-bit bus, running at 1313 MHz with 5.3 Gbps effective speed. The H800's bandwidth advantage comes from its extremely wide bus, not from higher clock speeds.

Compute units differ in composition. The Ryzen Z2 has 768 shading units, 48 TMUs, 32 ROPs, and 12 RT cores, with no tensor cores. The H800 has 16,896 shading units, 528 TMUs, 24 ROPs, and 528 tensor cores, with no dedicated RT cores. The H800's FP16 throughput of 237.2 TFLOPS at a 4:1 ratio indicates heavy reliance on tensor operations for mixed-precision work. The Ryzen Z2's FP16 runs at 1:1 with FP32, meaning no dedicated tensor hardware.

API support also differs. The Ryzen Z2 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The H800 lists no DirectX, OpenGL, or Vulkan support in the database, consistent with a server accelerator that does not target graphics APIs.

Clock behavior shows the different design goals. The Ryzen Z2 has a base clock of 800 MHz and a boost clock of 2700 MHz, a 3.4 times boost range. The H800 has a base clock of 1095 MHz and a boost clock of 1755 MHz, a 1.6 times boost range. The Ryzen Z2's wide boost range allows aggressive power scaling, while the H800 runs closer to its sustained maximum.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA H800 SXM5 delivers 59.30 TFLOPS FP32, which is 7.1 times higher than the AMD Ryzen Z2 GPU's 8.294 TFLOPS.

Q: What memory configurations do these GPUs use?

A: The AMD Ryzen Z2 GPU has 16 GB of LPDDR5X on a 128-bit bus with 119.9 GB/s bandwidth. The NVIDIA H800 SXM5 has 80 GB of HBM3 on a 5120-bit bus with 3.36 TB/s bandwidth.

Q: Does either GPU have tensor cores?

A: The NVIDIA H800 SXM5 has 528 tensor cores. The AMD Ryzen Z2 GPU has no tensor cores listed in the database.

Q: Which GPU supports display output?

A: Only the AMD Ryzen Z2 GPU has a display output, listed as 1x USB Type-C. The NVIDIA H800 SXM5 has no display outputs.

Q: What are the power requirements for each GPU?

A: The AMD Ryzen Z2 GPU has a 28 W TDP and requires no power connectors. The NVIDIA H800 SXM5 has a 700 W TDP, uses an 8-pin EPS connector, and the database suggests a 1100 W power supply.

Q: Which GPU has a higher pixel rate?

A: The AMD Ryzen Z2 GPU has a pixel rate of 86.40 GPixel/s, which exceeds the NVIDIA H800 SXM5's 42.12 GPixel/s despite the H800's much higher overall compute throughput.

Head-to-Head Benchmarks

The database records no head-to-head benchmark results between the AMD Ryzen Z2 GPU and the NVIDIA H800 SXM5. The winsA and winsB fields are both zero, and the headToHeadBenchmarks array is empty. This absence is expected given the product categories: a 28 W console GPU with display output versus a 700 W SXM server module with no outputs.

Despite the lack of direct measurements, the recorded specifications allow for clear comparisons. The largest single-spec win for the H800 is FP16 throughput: 237.2 TFLOPS versus 8.294 TFLOPS, a 28.6 times advantage. Memory bandwidth is the second-largest gap: 3.36 TB/s versus 119.9 GB/s, a 28.0 times difference. Shading unit count favors the H800 at 16,896 versus 768, a 22.0 times difference. Texture rate favors the H800 at 926.6 GTexel/s versus 129.6 GTexel/s, a 7.1 times difference. Tensor cores exist only on the H800 (528 cores), giving it exclusive capability for tensor-accelerated workloads.

The Ryzen Z2 GPU wins on pixel rate: 86.40 GPixel/s versus 42.12 GPixel/s, a 2.05 times advantage. It also wins on boost clock range, with a 2700 MHz boost versus the H800's 1755 MHz, and on transistor density, at 142.6 million per mm² versus 98.3 million per mm². The Ryzen Z2's 12 RT cores provide hardware ray tracing capability that the H800 does not list. The Ryzen Z2 also supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the H800 lists no graphics APIs.

The FP32 comparison is 59.30 TFLOPS versus 8.294 TFLOPS, a 7.1 times advantage for the H800. The H800's texture rate advantage matches that ratio exactly, at 7.1 times. The H800's memory clock runs at 1313 MHz versus 937 MHz, and its effective speed is 5.3 Gbps versus 7.5 Gbps. The Ryzen Z2's higher effective memory speed compensates partially for its narrower bus, but the 5120-bit bus on the H800 is the decisive factor.

Specification Differences

The following fields differ between the AMD Ryzen Z2 GPU and the NVIDIA H800 SXM5:

• Manufacturer: AMD versus NVIDIA
• Chip: Hawk Point versus GH100
• Architecture: RDNA 3.0 versus Hopper
• Generation: Console GPU (AMD) versus Server Hopper (Hxx)
• Process node: 4 nm versus 5 nm
• Transistors: 25,390 million versus 80,000 million
• Die size: 178 mm² versus 814 mm²
• Transistor density: 142.6M per mm² versus 98.3M per mm²
• Base clock: 800 MHz versus 1095 MHz
• Boost clock: 2700 MHz versus 1755 MHz
• Memory clock: 937 MHz (7.5 Gbps effective) versus 1313 MHz (5.3 Gbps effective)
• Memory size: 16 GB versus 80 GB
• Memory type: LPDDR5X versus HBM3
• Memory bus width: 128 bit versus 5120 bit
• Memory bandwidth: 119.9 GB/s versus 3.36 TB/s
• Shading units: 768 versus 16,896
• TMUs: 48 versus 528
• ROPs: 32 versus 24
• RT cores: 12 versus none listed
• Tensor cores: none listed versus 528
• Pixel rate: 86.40 GPixel/s versus 42.12 GPixel/s
• Texture rate: 129.6 GTexel/s versus 926.6 GTexel/s
• FP32: 8.294 TFLOPS versus 59.30 TFLOPS
• FP16: 8.294 TFLOPS (1:1) versus 237.2 TFLOPS (4:1)
• TDP: 28 W versus 700 W
• Slot width: not listed versus SXM Module
• Power connectors: None versus 8-pin EPS
• Suggested PSU: not listed versus 1100 W
• Bus interface: not listed versus PCIe 5.0 x16
• Display outputs: 1x USB Type-C versus No outputs
• APIs: DirectX 12 Ultimate (12_2), OpenGL 4.6, Vulkan 1.4 versus none listed
• Release date: 2024-12-31 versus 2023-03-20
• Predecessor: none listed versus Server Ada
• Successor: none listed versus Server Blackwell

Fields that match or are absent in both include series, codename, game clock, launch MSRP, dimensions, benchmarks, and average benchmark score. Both products are listed as Active in production status, and both have a percentile of 50 against all GPUs.