AMD Ryzen Z1 Extreme GPU vs NVIDIA H20 Comparison

Head-to-Head Benchmarks

The recorded data shows no direct benchmark comparisons between the AMD Ryzen Z1 Extreme GPU and the NVIDIA H20. Both entries carry an average benchmark score of 0, and the database lists no head-to-head benchmark results for this pairing. The percentile ranking for both parts sits at 50, indicating that within the database's recorded distribution, neither part has accumulated enough measured performance data to be positioned above or below the other.

The absence of measured results does not mean the two parts are comparable. The AMD Ryzen Z1 Extreme GPU delivers 8.294 TFLOPS of FP32 compute, while the NVIDIA H20 delivers 39.54 TFLOPS. That difference, a factor of roughly 4.8, places the H20 in a different performance class entirely. In FP16 throughput, the H20 reaches 79.07 TFLOPS with a 2:1 ratio, while the Ryzen Z1 Extreme GPU reaches 16.59 TFLOPS under the same ratio. The H20's FP16 output is approximately 4.8 times higher, matching the FP32 gap.

Texture processing follows a similar pattern. The NVIDIA H20 achieves 617.8 GTexel/s, compared to 129.6 GTexel/s for the AMD part, a 4.8 times difference. Pixel throughput, however, tells a different story. The AMD Ryzen Z1 Extreme GPU posts 86.40 GPixel/s, while the NVIDIA H20 posts 47.52 GPixel/s. The AMD part is roughly 82% higher in pixel fill rate, a significant advantage that reflects the H20's server-oriented design, which prioritizes compute and tensor workloads over traditional rasterization output.

Memory bandwidth is where the H20 separates itself most decisively. The NVIDIA H20 delivers 4.03 TB/s of bandwidth from its HBM3 memory, while the AMD Ryzen Z1 Extreme GPU manages 51.20 GB/s from LPDDR5. The H20's bandwidth is approximately 79 times higher. This gap matters for large data movement, particularly in AI inference and training workloads where memory access patterns dominate execution time.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA H20. It delivers 39.54 TFLOPS of FP32 compute, compared to 8.294 TFLOPS for the AMD Ryzen Z1 Extreme GPU, a difference of roughly 4.8 times.

Q: How do the memory configurations differ?

A: The AMD Ryzen Z1 Extreme GPU uses 16 GB of LPDDR5 memory on a 64-bit bus, yielding 51.20 GB/s of bandwidth. The NVIDIA H20 uses 96 GB of HBM3 memory on a 6144-bit bus, yielding 4.03 TB/s of bandwidth.

Q: Which part has more shading units?

A: The NVIDIA H20 has 9,984 shading units, while the AMD Ryzen Z1 Extreme GPU has 768 shading units. The H20 also has 312 tensor cores and 312 TMUs, whereas the AMD part has 48 TMUs and 12 RT cores.

Q: What are the power requirements for each?

A: The AMD Ryzen Z1 Extreme GPU has a TDP of 30 W and requires no power connectors. The NVIDIA H20 has a TDP of 500 W and carries a suggested PSU rating of 900 W.

Q: Do both support DirectX?

A: No. The AMD Ryzen Z1 Extreme GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA H20 reports N/A for DirectX, OpenGL, and Vulkan, consistent with its server-oriented design that has no display outputs.

Q: What is the physical form factor difference?

A: The AMD Ryzen Z1 Extreme GPU measures 280 mm in length, 111 mm in height, and 21 mm in width, with a display output of 1x USB Type-C. The NVIDIA H20 is an SXM module with no listed dimensions and no display outputs.

Architecture Differences

The two accelerators come from different architectural lineages. The AMD Ryzen Z1 Extreme GPU uses the Phoenix chip built on RDNA 3.0, while the NVIDIA H20 uses the GH100 chip built on Hopper. The process nodes differ: AMD fabricates on TSMC's 4 nm process, while NVIDIA uses TSMC's 5 nm process. Transistor counts diverge sharply, with the H20 carrying 80,000 million transistors on an 814 mm² die, versus 25,390 million transistors on a 178 mm² die for the AMD part. Transistor density favors AMD at 142.6M per mm², compared to 98.3M per mm² for NVIDIA.

The H20's compute architecture emphasizes tensor operations with 312 tensor cores, a feature the AMD Ryzen Z1 Extreme GPU lacks entirely. The AMD part instead includes 12 RT cores for ray tracing, which the H20 does not list. Shader organization also differs: the AMD part has 768 shading units, 48 TMUs, and 32 ROPs, while the H20 has 9,984 shading units, 312 TMUs, and only 24 ROPs. The low ROP count on the H20, combined with its higher shading unit count, indicates a design optimized for compute throughput rather than pixel output.

Memory architecture reinforces the divide. The AMD Ryzen Z1 Extreme GPU uses LPDDR5 memory with a 64-bit bus, typical for an integrated or low-power console-oriented part. The H20 uses HBM3 with a 6144-bit bus, a configuration built for bandwidth-intensive server workloads. The API support also reflects different target environments: AMD lists DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while NVIDIA lists N/A for all three, paired with a PCIe 5.0 x16 bus interface and no display outputs.

Specification Differences

The two parts differ across nearly every measured specification. Clock speeds: the AMD part runs at a base of 800 MHz and a boost of 2700 MHz, while the H20 runs at a base of 1830 MHz and a boost of 1980 MHz. Memory clocks also differ: AMD lists 800 MHz with 6.4 Gbps effective, NVIDIA lists 1313 MHz with 5.3 Gbps effective. Memory capacity and type diverge completely: 16 GB LPDDR5 versus 96 GB HBM3. Bus width: 64 bit versus 6144 bit. Bandwidth: 51.20 GB/s versus 4.03 TB/s.

Compute resources differ by an order of magnitude. Shading units: 768 versus 9,984. TMUs: 48 versus 312. ROPs: 32 versus 24. The AMD part has 12 RT cores; the H20 has none listed. The H20 has 312 tensor cores; the AMD part has none listed. Pixel rate: 86.40 GPixel/s versus 47.52 GPixel/s. Texture rate: 129.6 GTexel/s versus 617.8 GTexel/s. FP32: 8.294 TFLOPS versus 39.54 TFLOPS. FP16: 16.59 TFLOPS versus 79.07 TFLOPS, both at 2:1 ratios.

Power and physical specifications are equally distinct. The AMD part has a 30 W TDP, no power connectors, and dimensions of 280 mm by 111 mm by 21 mm. The H20 has a 500 W TDP, a 900 W suggested PSU, and is an SXM module with no listed dimensions. The AMD part has one USB Type-C display output; the H20 has no outputs. The bus interface: the AMD part lists none, the H20 uses PCIe 5.0 x16. Release dates also differ: the AMD part launched on 2023-06-12, the H20 on 2024-01-31. The H20 lists a predecessor (Server Ada) and successor (Server Blackwell); the AMD part lists neither. The AMD part has a launch MSRP of 699 USD; the H20 lists no MSRP.

The Verdict

The data indicates two products with fundamentally different purposes. The NVIDIA H20 is a server accelerator built for compute-heavy tasks, evidenced by its 39.54 TFLOPS FP32 output, 79.07 TFLOPS FP16 output, 312 tensor cores, 96 GB of HBM3 memory, and 4.03 TB/s of bandwidth. Its 500 W TDP and SXM module form factor further confirm a data-center orientation. The AMD Ryzen Z1 Extreme GPU is a low-power part with a 30 W TDP, 8.294 TFLOPS FP32, 16 GB of LPDDR5 memory, and 51.20 GB/s of bandwidth, designed for a compact, mobile or embedded context with a single USB Type-C output.

Benchmark results do not exist to rank them against each other, but the specification gap is so wide that no direct comparison is needed. The H20 outperforms the AMD part by roughly 4.8 times in FP32 and FP16 compute, and by approximately 79 times in memory bandwidth. The AMD part counters with a higher pixel rate, 86.40 GPixel/s versus 47.52 GPixel/s, and a much lower power envelope.

The H20's lack of display outputs and graphics API support means it cannot function as a conventional graphics card. The AMD part, with DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support, is a fully capable graphics processor for rendering workloads. The data does not support treating them as alternatives; they occupy separate product categories.

Where Each One Wins

The NVIDIA H20 wins in every compute-oriented specification. FP32 and FP16 throughput are roughly 4.8 times higher. Texture rate is 4.8 times higher. Memory bandwidth is approximately 79 times higher. Tensor core presence, 312 cores, gives the H20 a dedicated path for AI and machine learning workloads that the AMD part cannot match. The H20's 96 GB of HBM3 memory provides capacity for large models and datasets, while its PCIe 5.0 x16 interface supports high-speed host communication in server environments.

The AMD Ryzen Z1 Extreme GPU wins in pixel throughput, posting 86.40 GPixel/s against the H20's 47.52 GPixel/s. It also wins on power efficiency, with a 30 W TDP versus 500 W. The AMD part has a higher boost clock at 2700 MHz versus 1980 MHz, and a higher transistor density at 142.6M per mm² versus 98.3M per mm². It supports a full graphics API stack with DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and it includes 12 RT cores for ray tracing, a feature absent from the H20's listed specifications. The AMD part has a physical display output, 1x USB Type-C, and fits in a 280 mm by 111 mm by 21 mm form factor, while the H20 is a module with no display capability.

For rendering and graphics tasks, the AMD part holds the advantage in pixel rate and API compatibility. For compute, tensor, and memory-intensive workloads, the H20 dominates across every relevant metric. The database records no benchmark scores to refine this split further, so the verdict rests on the specification differences alone.