NVIDIA H20 NVL16 vs NVIDIA RTX 4000 Ada Generation Comparison

FAQ

Q: Which GPU has more memory and memory bandwidth?

A: The NVIDIA H20 NVL16 uses 96 GB of HBM3 on a 6144-bit bus, delivering 4.03 TB/s of bandwidth. The NVIDIA RTX 4000 Ada Generation has 20 GB of GDDR6 on a 160-bit bus, delivering 360.0 GB/s. The H20 NVL16 has significantly more capacity and bandwidth.

Q: What are the raw compute differences between the two?

A: The H20 NVL16 delivers 39.54 TFLOPS FP32 and 79.07 TFLOPS FP16 (2:1). The RTX 4000 Ada Generation delivers 26.73 TFLOPS FP32 and 26.73 TFLOPS FP16 (1:1). The H20 NVL16 leads in both FP32 and FP16 throughput.

Q: Which card supports modern graphics APIs?

A: The RTX 4000 Ada Generation supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The H20 NVL16 has no graphics API support, marked as N/A for DirectX, OpenGL, and Vulkan.

Q: How do the physical specifications differ?

A: The H20 NVL16 is an SXM Module with a 400 W TDP and an 800 W suggested PSU. The RTX 4000 Ada Generation is a single-slot PCIe card with a 130 W TDP, a 300 W suggested PSU, and measures 245 mm (9.6 inches) in length and 112 mm (4.4 inches) in height.

Q: What is the performance percentile ranking for each?

A: The H20 NVL16 sits at the 50th percentile among all GPUs in the database. The RTX 4000 Ada Generation sits at the 95th percentile. The RTX 4000 Ada Generation also has an average benchmark score of 135218, while the H20 NVL16 has no recorded benchmark scores.

Q: Which card has display outputs?

A: The RTX 4000 Ada Generation has 4x DisplayPort 1.4a outputs. The H20 NVL16 has no display outputs, making it unsuitable for direct display connection.

The Verdict

The data shows two fundamentally different tools. The NVIDIA H20 NVL16 is a compute-focused server module, built for large memory workloads with 96 GB of HBM3 and 4.03 TB/s bandwidth. It lacks display outputs and graphics API support entirely. Its 50th percentile ranking reflects that it is not designed for general-purpose or graphics benchmarking.

The NVIDIA RTX 4000 Ada Generation is a workstation card with 20 GB of GDDR6, 4x DisplayPort 1.4a outputs, and full graphics API support including DirectX 12 Ultimate and Vulkan 1.4. It holds a 95th percentile ranking and delivers an average benchmark score of 135218, placing it within 0.9% of its nearest rivals in the database.

Pick the H20 NVL16 for server-side compute tasks that need massive memory capacity and high FP16 throughput. Pick the RTX 4000 Ada Generation for workstation use where graphics output, API compatibility, and compact power usage matter. The RTX 4000 Ada Generation is clearly the better choice for any workload involving rendering, display output, or standard graphics pipelines. The H20 NVL16 is the better choice for large-scale data processing or inference workloads that fit within its 96 GB memory pool and benefit from its 79.07 TFLOPS FP16 rate.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between these two cards. Instead, the available data comes from separate benchmark entries. The RTX 4000 Ada Generation has two recorded scores: 146593 in Geekbench OpenCL and 123842 in Geekbench Vulkan. These average to 135218, which places the card at the 95th percentile among all GPUs.

The H20 NVL16 has no recorded benchmark scores, and its average benchmark score is listed as 0. Its 50th percentile ranking is derived from the overall database distribution, not from measured performance data. This absence of scores indicates the H20 NVL16 is not typically used in the kinds of benchmarks that populate the database, likely because its server-oriented design lacks the graphics and display features required for standard GPU testing.

The nearest rivals for the RTX 4000 Ada Generation show how tightly packed workstation performance is at this tier. The NVIDIA A10M scores 135230, a 0% delta. The AMD Radeon PRO W6800 scores 135396, a -0.1% delta. The AMD Radeon Pro W6800X Duo scores 135774, a -0.4% delta. The AMD Radeon PRO V620 scores 136472, a -0.9% delta. The RTX 4000 Ada Generation effectively matches these rivals, with all five cards within a 1% spread.

For the H20 NVL16, no rival data exists in the database, so no comparative performance statements can be made from recorded measurements.

Specification Differences

The H20 NVL16 uses the GH100 chip on the Hopper architecture, built on TSMC's 5 nm process. It contains 80,000 million transistors on an 814 mm² die, with a transistor density of 98.3M per mm². Its base clock is 1830 MHz and boost clock is 1980 MHz. Memory runs at 1313 MHz with 5.3 Gbps effective. The card has 9984 shading units, 312 TMUs, 24 ROPs, 312 tensor cores, and no RT cores. Pixel rate is 47.52 GPixel/s, texture rate is 617.8 GTexel/s. FP32 is 39.54 TFLOPS, FP16 is 79.07 TFLOPS (2:1). TDP is 400 W, it uses an SXM Module slot, and the suggested PSU is 800 W. Bus interface is PCIe 5.0 x16. It has no display outputs.

The RTX 4000 Ada Generation uses the AD104 chip on the Ada Lovelace architecture, also on TSMC's 5 nm process. It contains 35,800 million transistors on a 294 mm² die, with a transistor density of 121.8M per mm². Base clock is 1500 MHz, boost clock is 2175 MHz. Memory runs at 2250 MHz with 18 Gbps effective. The card has 6144 shading units, 192 TMUs, 64 ROPs, 48 RT cores, and 192 tensor cores. Pixel rate is 139.2 GPixel/s, texture rate is 417.6 GTexel/s. FP32 is 26.73 TFLOPS, FP16 is 26.73 TFLOPS (1:1). TDP is 130 W, it is a single-slot card with a 1x 16-pin power connector, and the suggested PSU is 300 W. Bus interface is PCIe 4.0 x16. It has 4x DisplayPort 1.4a outputs.

The H20 NVL16 has higher transistor count, larger die, more shading units, more TMUs, more tensor cores, and higher FP32 and FP16 throughput. The RTX 4000 Ada Generation has more ROPs, higher clock speeds, RT cores, a lower TDP, a smaller physical footprint, and display outputs.

Architecture Differences

The H20 NVL16 is built on the Hopper architecture, designed for server and data center workloads. Its GH100 chip uses 80,000 million transistors across an 814 mm² die. The architecture prioritizes tensor throughput, with 312 tensor cores supporting 79.07 TFLOPS FP16. It lacks RT cores and graphics API support, confirming its compute-only orientation. The 96 GB HBM3 memory with a 6144-bit bus is sized for large models and datasets. The card is released in the Server Hopper generation, with a predecessor of Server Ada and a successor of Server Blackwell.

The RTX 4000 Ada Generation is built on the Ada Lovelace architecture, designed for workstation and professional graphics. Its AD104 chip uses 35,800 million transistors across a 294 mm² die, achieving a higher transistor density of 121.8M per mm² compared to the H20 NVL16's 98.3M per mm². The architecture includes 48 RT cores for ray tracing and full support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. FP16 runs at 1:1 rate with FP32, meaning no dedicated FP16 acceleration advantage. The 20 GB GDDR6 memory on a 160-bit bus provides 360.0 GB/s. It belongs to the Workstation Ada generation, with a predecessor of Workstation Ampere and a successor of Blackwell PRO W.

The key architectural split is compute density versus feature completeness. The H20 NVL16 delivers more raw FP16 performance and memory bandwidth, while the RTX 4000 Ada Generation delivers graphics features, RT cores, and a compact single-slot form factor.

Where Each One Wins

NVIDIA H20 NVL16 wins on:

• FP32 throughput: 39.54 TFLOPS versus 26.73 TFLOPS, a 48% advantage.
• FP16 throughput: 79.07 TFLOPS versus 26.73 TFLOPS, a 196% advantage.
• Memory capacity: 96 GB versus 20 GB.
• Memory bandwidth: 4.03 TB/s versus 360.0 GB/s, over 11 times higher.
• Memory bus width: 6144-bit versus 160-bit.
• Texture rate: 617.8 GTexel/s versus 417.6 GTexel/s.
• Shading units: 9984 versus 6144.
• Tensor cores: 312 versus 192.
• PCIe interface: PCIe 5.0 x16 versus PCIe 4.0 x16.
• Transistor count: 80,000 million versus 35,800 million.

NVIDIA RTX 4000 Ada Generation wins on:

• Pixel rate: 139.2 GPixel/s versus 47.52 GPixel/s.
• ROPs: 64 versus 24.
• Boost clock: 2175 MHz versus 1980 MHz.
• RT cores: 48 versus 0.
• Graphics API support: DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4 versus N/A.
• Display outputs: 4x DisplayPort 1.4a versus none.
• Power efficiency: 130 W TDP versus 400 W TDP.
• Suggested PSU: 300 W versus 800 W.
• Physical footprint: single-slot, 245 mm length versus SXM Module.
• Transistor density: 121.8M per mm² versus 98.3M per mm².
• Benchmark standing: 95th percentile with a 135218 average score versus 50th percentile with no scores.

The H20 NVL16 is the clear winner for massive parallel compute, large memory footprints, and high-bandwidth data movement. The RTX 4000 Ada Generation is the clear winner for any task requiring graphics output, ray tracing, standard API compatibility, or low power consumption in a workstation chassis. The benchmark data only records scores for the RTX 4000 Ada Generation, so its 95th percentile ranking reflects measured performance, while the H20 NVL16's 50th percentile is a placeholder without recorded test results.