AMD Radeon PRO W7900 vs NVIDIA H20 Comparison

The Verdict

The recorded data presents two fundamentally different accelerators with almost no direct overlap in measured performance. The AMD Radeon PRO W7900 is a workstation graphics card with a substantial benchmark presence, posting an average benchmark score of 110,725 and sitting in the 94th percentile of all GPUs in the database. The NVIDIA H20, by contrast, has no recorded benchmark scores, an average benchmark score of zero, and a 50th percentile ranking, which reflects its status as a compute-oriented server module rather than a graphics-rendering product. For any task that involves the Geekbench OpenCL or Vulkan workloads captured in the database, the AMD card is the only one with measurable results. The NVIDIA H20 cannot be evaluated on those same graphics benchmarks because it has no display outputs and no DirectX, OpenGL, or Vulkan API support in the database.

The data indicates that the AMD Radeon PRO W7900 is the appropriate choice for workstation graphics workloads where rendering, pixel output, and graphics API compatibility matter. The NVIDIA H20 is better understood as a dense compute accelerator: it carries 80,000 million transistors, 96 GB of HBM3 memory, and 312 tensor cores, but the database contains no benchmark results to confirm its practical performance. The verdict from the evidence is straightforward: the AMD card has demonstrated graphics performance, while the NVIDIA H20 has no verified performance data in this database and cannot be compared on equal terms.

Where Each One Wins

The AMD Radeon PRO W7900 wins in every recorded benchmark category by default, since the NVIDIA H20 has no entries in the head-to-head benchmark list and no standalone benchmark scores. The AMD card delivers 61.32 TFLOPS of FP32 compute and 61.32 TFLOPS of FP16 compute with a 1:1 ratio, which indicates balanced throughput for both single-precision and half-precision workloads. Its pixel rate of 479.0 GPixel/s and texture rate of 958.1 GTexel/s point toward strong rasterization performance, which matters for graphics-intensive workstation tasks.

The NVIDIA H20 wins in categories that the database does not measure with benchmarks. It offers 79.07 TFLOPS of FP16 compute with a 2:1 ratio, which means its half-precision throughput is double its FP32 rate of 39.54 TFLOPS. This asymmetric ratio is typical of accelerators designed for AI training and inference, where reduced-precision arithmetic dominates. The H20 also provides 4.03 TB/s of memory bandwidth from its 6144-bit HBM3 bus, which is substantially higher than the AMD card's 864.0 GB/s from a 384-bit GDDR6 bus. For memory-bound compute tasks, the H20's bandwidth advantage is clear from the specifications alone, even without benchmark confirmation.

Architecture Differences

The two accelerators come from different architectural lineages. The AMD Radeon PRO W7900 uses the Navi 31 chip with the RDNA 3.0 architecture, codenamed Plum Bonito, built on a 5 nm TSMC process with 57,700 million transistors on a 529 mm² die. The NVIDIA H20 uses the GH100 chip with the Hopper architecture, also built on a 5 nm TSMC process, but with 80,000 million transistors on a larger 814 mm² die. The transistor density differs: the AMD chip packs 109.1 million transistors per square millimeter, while the NVIDIA chip achieves 98.3 million per square millimeter.

The compute resources diverge significantly. The AMD card has 6,144 shading units, 384 texture mapping units, and 192 ROPs, with 96 ray tracing cores and no tensor cores. The NVIDIA H20 has 9,984 shading units, 312 texture mapping units, and only 24 ROPs, with no ray tracing cores listed and 312 tensor cores. The ROP count difference is stark: 192 versus 24, which explains the AMD card's dominant pixel rate of 479.0 GPixel/s compared to the H20's 47.52 GPixel/s. The H20's low ROP count and lack of display outputs confirm its role as a compute accelerator rather than a graphics card.

Memory architecture also differs. The AMD card uses 48 GB of GDDR6 on a 384-bit bus, while the NVIDIA H20 uses 96 GB of HBM3 on a 6144-bit bus. The H20's memory clock is 1313 MHz with 5.3 Gbps effective transfer, while the AMD card's memory runs at 2250 MHz with 18 Gbps effective. The H20's much wider bus more than compensates for its lower clock speed, yielding 4.03 TB/s versus 864.0 GB/s. The NVIDIA H20 also uses a PCIe 5.0 x16 interface, while the AMD card uses PCIe 4.0 x16.

FAQ

Q: Which card has higher FP32 compute performance?

A: The AMD Radeon PRO W7900 delivers 61.32 TFLOPS of FP32 compute, while the NVIDIA H20 delivers 39.54 TFLOPS. The AMD card is approximately 55% higher in single-precision throughput.

Q: Does the NVIDIA H20 support graphics APIs?

A: No. The database lists DirectX, OpenGL, and Vulkan as N/A for the NVIDIA H20, and it has no display outputs. The AMD Radeon PRO W7900 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, with three DisplayPort 2.1 outputs and one mini-DisplayPort 2.1 output.

Q: How do the memory capacities compare?

A: The NVIDIA H20 has 96 GB of HBM3 memory, which is double the 48 GB of GDDR6 found on the AMD Radeon PRO W7900. The H20 also has a much wider 6144-bit memory bus compared to the AMD card's 384-bit bus.

Q: What is the transistor count difference?

A: The NVIDIA H20 uses 80,000 million transistors on its GH100 chip, while the AMD Radeon PRO W7900 uses 57,700 million transistors on its Navi 31 chip. The NVIDIA chip is also larger at 814 mm² versus 529 mm².

Q: Why does the NVIDIA H20 have no benchmark scores in the database?

A: The recorded data shows an empty benchmark array, an average benchmark score of zero, and a 50th percentile ranking for the NVIDIA H20. The AMD Radeon PRO W7900 has two recorded benchmarks: a Geekbench OpenCL score of 84,379 and a Geekbench Vulkan score of 137,070, giving it a 94th percentile ranking.

Q: What are the thermal and power requirements?

A: The AMD Radeon PRO W7900 has a TDP of 295 W and requires a 600 W suggested PSU, using two 8-pin power connectors in a triple-slot form factor. The NVIDIA H20 has a TDP of 500 W and requires a 900 W suggested PSU, using an SXM module form factor with no power connectors listed.

Head-to-Head Benchmarks

The head-to-head benchmark list is empty, meaning the database contains no direct comparison results between the AMD Radeon PRO W7900 and the NVIDIA H20. The only measurable performance data comes from the AMD card's standalone benchmarks. Its Geekbench OpenCL score of 84,379 and Geekbench Vulkan score of 137,070 combine to produce an average benchmark score of 110,725. The NVIDIA H20 has no standalone scores to analyze.

The AMD card's nearest rivals in the database provide context for its performance level. It sits 1% above the AMD Radeon Pro Vega II, which averages 109,617, and 3.2% above the AMD Radeon Pro W6600X, which averages 107,342. It trails the NVIDIA RTX A5500 Mobile by 2.8% (that rival averages 113,944) and the NVIDIA Tesla V100 SXM2 16 GB by 3.2% (that rival averages 114,395). These narrow margins indicate the W7900 sits in a competitive performance band among workstation and professional GPUs, despite its lack of a direct H20 comparison.

The NVIDIA H20's 50th percentile ranking with zero average score places it below every GPU with recorded benchmarks in the database. This is not evidence of poor performance; rather, it reflects the absence of measured results. The H20's specifications suggest compute capability that the current benchmark suite does not capture. Its FP16 throughput of 79.07 TFLOPS exceeds the AMD card's 61.32 TFLOPS, and its memory bandwidth of 4.03 TB/s is over four times the AMD card's 864.0 GB/s. The AMD card's FP32 rate of 61.32 TFLOPS, however, exceeds the H20's 39.54 TFLOPS, and the AMD card's pixel rate of 479.0 GPixel/s dwarfs the H20's 47.52 GPixel/s.

Specification Differences

The two accelerators differ across nearly every recorded specification. The AMD Radeon PRO W7900 uses the Navi 31 chip with RDNA 3.0 architecture and the Plum Bonito codename, while the NVIDIA H20 uses the GH100 chip with Hopper architecture and no recorded codename. Both use a 5 nm TSMC process, but the AMD chip has 57,700 million transistors on a 529 mm² die with a density of 109.1M per mm², while the NVIDIA chip has 80,000 million transistors on an 814 mm² die with a density of 98.3M per mm².

Clock speeds differ: the AMD card has a base clock of 1760 MHz and a boost clock of 2495 MHz, while the H20 has a base clock of 1830 MHz and a boost clock of 1980 MHz. Memory clocks also differ, with the AMD card at 2250 MHz (18 Gbps effective) and the H20 at 1313 MHz (5.3 Gbps effective). Memory capacity, type, bus width, and bandwidth all favor the H20: 96 GB HBM3 on a 6144-bit bus with 4.03 TB/s versus 48 GB GDDR6 on a 384-bit bus with 864.0 GB/s.

Compute unit counts show a mixed picture. The H20 has more shading units (9,984 versus 6,144) and more tensor cores (312 versus none), while the AMD card has more TMUs (384 versus 312), more ROPs (192 versus 24), and more ray tracing cores (96 versus none). The AMD card achieves higher pixel rate (479.0 GPixel/s versus 47.52 GPixel/s) and higher texture rate (958.1 GTexel/s versus 617.8 GTexel/s). The AMD card leads in FP32 (61.32 TFLOPS versus 39.54 TFLOPS), while the H20 leads in FP16 (79.07 TFLOPS versus 61.32 TFLOPS).

Power and physical specifications also differ. The AMD card draws 295 W with a 600 W suggested PSU, uses two 8-pin connectors, and occupies a triple-slot form factor measuring 280 mm in length, 110 mm in height, and 51 mm in width. The H20 draws 500 W with a 900 W suggested PSU, uses an SXM module form factor with no listed power connectors or dimensions, and has no display outputs. The AMD card uses PCIe 4.0 x16, while the H20 uses PCIe 5.0 x16. The AMD card supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4; the H20 lists N/A for all three APIs. The AMD card was released on May 25, 2023, with a launch MSRP of 3,999 USD, while the H20 was released on January 31, 2024, with no launch MSRP recorded. The AMD card's predecessor is the Radeon Pro Vega, while the H20's predecessor is Server Ada and its successor is Server Blackwell.