NVIDIA GeForce RTX 4090 D vs NVIDIA H20 NVL16 Comparison

Where Each One Wins

The recorded data draws a stark contrast between these two NVIDIA accelerators. The GeForce RTX 4090 D is a client-facing graphics card built for rendering, rasterization, and general compute workloads, while the H20 NVL16 is a server-oriented accelerator with no display outputs and a profile tuned for memory bandwidth and FP16 throughput.

The RTX 4090 D wins decisively in every benchmark category where scores exist. Its 3DMark Steel Nomad DX12 score of 8,587 points confirms strong graphics performance, and its Geekbench OpenCL score of 278,621 and Vulkan score of 246,941 both land in the top percentile of all GPUs. The H20 NVL16 has no recorded benchmark scores in the database, which means direct comparisons rely on architectural specifications rather than measured results.

Where the H20 NVL16 wins is in memory capacity and bandwidth. It carries 96 GB of HBM3 memory across a 6,144-bit bus, delivering 4.03 TB/s of bandwidth. The RTX 4090 D has 24 GB of GDDR6X on a 384-bit bus with 1.01 TB/s. For workloads that depend on holding large datasets or models in memory, the H20 NVL16 provides roughly four times the capacity and four times the bandwidth. The data also shows the H20 NVL16 has a 2:1 FP16 to FP32 ratio, producing 79.07 TFLOPS of FP16 compute versus 39.54 TFLOPS of FP32, while the RTX 4090 D offers 73.54 TFLOPS for both FP16 and FP32 at a 1:1 ratio.

The use-case split is clear. The RTX 4090 D targets interactive graphics, gaming, and desktop compute with its triple-slot cooler, 16-pin power connector, and display outputs. The H20 NVL16 targets server deployments where memory bandwidth and FP16 tensor throughput matter more than rasterization or pixel output.

Architecture Differences

The two chips come from different NVIDIA architectures. The RTX 4090 D uses the AD102 chip built on Ada Lovelace, fabricated by TSMC on a 5 nm process. It contains 76,300 million transistors on a 609 mm² die, giving a transistor density of 125.3 million per square millimeter. The H20 NVL16 uses the GH100 chip built on Hopper, also on TSMC 5 nm, with 80,000 million transistors on a larger 814 mm² die, producing a lower density of 98.3 million per square millimeter.

The compute resources differ substantially. The RTX 4090 D has 14,592 shading units, 456 texture mapping units, 176 ROPs, 114 RT cores, and 456 tensor cores. The H20 NVL16 has 9,984 shading units, 312 TMUs, only 24 ROPs, no RT cores listed, and 312 tensor cores. The pixel rate reflects the ROP disparity: 443.5 GPixel/s for the RTX 4090 D versus 47.52 GPixel/s for the H20 NVL16. Texture rate also favors the RTX 4090 D at 1,149.1 GTexel/s versus 617.8 GTexel/s.

Clock speeds differ as well. The RTX 4090 D runs at a base of 2,280 MHz and boosts to 2,520 MHz. The H20 NVL16 has a lower base of 1,830 MHz and a boost of 1,980 MHz. Memory clocks show the RTX 4090 D at 1,313 MHz with 21 Gbps effective, while the H20 NVL16 runs at 1,313 MHz with 5.3 Gbps effective, but the much wider HBM3 bus compensates in total bandwidth.

Form factor and interfaces diverge completely. The RTX 4090 D is a triple-slot PCIe 4.0 x16 card measuring 304 mm in length, 137 mm in height, and 61 mm in width, with one 16-pin power connector and a suggested 800 W PSU. The H20 NVL16 is an SXM module with no power connector listed, no dimensions, and a PCIe 5.0 x16 interface. The RTX 4090 D supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the H20 NVL16 reports N/A for all graphics APIs. Display outputs exist only on the RTX 4090 D: one HDMI 2.1 and three DisplayPort 1.4a.

Power consumption shows a 400 W TDP for the H20 NVL16 and 425 W for the RTX 4090 D, a modest gap given the different roles.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries for these two products, so the comparison relies on the individual recorded scores and the architectural specifications.

The RTX 4090 D posts an average benchmark score of 178,050 across its three tests, placing it in the 98th percentile of all GPUs. Its nearest rivals in the database are the NVIDIA RTX PRO 5000 Blackwell at 182,109 (2.2% higher), the A100 SXM4 80 GB at 183,725 (3.1% higher), the RTX 5000 Ada Generation at 184,664 (3.6% higher), and the A100 SXM4 40 GB at 187,147 (4.9% higher). These deltas show the RTX 4090 D sits within a few percentage points of several professional and server cards, despite being positioned as a consumer GeForce product.

The H20 NVL16 has an average benchmark score of zero, a percentile rank of 50, and no nearest rivals. This means the database holds no measured performance data for it. The only quantitative information comes from its specification sheet.

Looking at raw compute numbers, the RTX 4090 D delivers 73.54 TFLOPS of FP32, nearly double the 39.54 TFLOPS of the H20 NVL16. In FP16, the RTX 4090 D again hits 73.54 TFLOPS, but the H20 NVL16 reaches 79.07 TFLOPS thanks to its 2:1 ratio. That is a 7.5% advantage for the H20 NVL16 in FP16, a meaningful edge for AI inference and training workloads that rely on reduced precision.

Memory bandwidth presents the largest single-spec gap. The H20 NVL16's 4.03 TB/s is exactly four times the 1.01 TB/s of the RTX 4090 D. Memory capacity follows the same pattern: 96 GB versus 24 GB, also a 4:1 ratio. The H20 NVL16's 6,144-bit bus is 16 times wider than the RTX 4090 D's 384-bit bus, though the lower effective memory clock narrows the realized bandwidth advantage.

The pixel rate tells a different story. The RTX 4090 D outputs 443.5 GPixel/s, which is more than nine times the 47.52 GPixel/s of the H20 NVL16. The ROP count of 176 versus 24 explains this disparity. The H20 NVL16 is not designed for rasterization output; its 24 ROPs are minimal, and the lack of display outputs confirms its server orientation.

The Verdict

The data supports a clear split. The GeForce RTX 4090 D is the choice for graphics-heavy workloads, desktop compute, and any task requiring display output, DirectX 12 Ultimate support, or high FP32 throughput. Its 98th percentile ranking, 8,587 Steel Nomad score, and 278,621 OpenCL score demonstrate strong measured performance. The 425 W TDP, triple-slot cooler, and 1x 16-pin connector make it a conventional high-end graphics card.

The H20 NVL16 is the choice for memory-bound server workloads. Its 96 GB HBM3 pool, 4.03 TB/s bandwidth, and 79.07 TFLOPS FP16 compute target large model inference and training scenarios. The absence of display outputs, graphics API support, and recorded benchmarks means no data supports claims about its real-world performance, but the specifications indicate a specialized accelerator rather than a general-purpose GPU.

Users who need rasterization, ray tracing, or OpenGL/Vulkan support have exactly one option in this pair: the RTX 4090 D. Users who need maximum memory capacity and FP16 throughput in a server chassis have exactly one option: the H20 NVL16. Neither product substitutes for the other.

The RTX 4090 D was released on 2023-12-27 with a launch MSRP of 1,599 USD and is now end-of-life, succeeded by the GeForce 50 series. The H20 NVL16 was released on 2025-09-01, remains active, and sits between Server Ada as its predecessor and Server Blackwell as its successor. These lifecycles reinforce the different market positions.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The RTX 4090 D delivers 73.54 TFLOPS of FP32, while the H20 NVL16 delivers 39.54 TFLOPS. The RTX 4090 D has nearly double the FP32 throughput.

Q: Which GPU has more memory bandwidth?

A: The H20 NVL16 has 4.03 TB/s of bandwidth from its 96 GB HBM3 memory on a 6,144-bit bus. The RTX 4090 D has 1.01 TB/s from 24 GB GDDR6X on a 384-bit bus.

Q: Does the H20 NVL16 support DirectX or Vulkan?

A: No. The H20 NVL16 reports N/A for DirectX, OpenGL, and Vulkan. The RTX 4090 D supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Q: What is the difference in FP16 performance?

A: The H20 NVL16 achieves 79.07 TFLOPS of FP16 with a 2:1 FP16 to FP32 ratio. The RTX 4090 D achieves 73.54 TFLOPS of FP16 with a 1:1 ratio. The H20 NVL16 is 7.5% higher in FP16.

Q: Which GPU has more shading units and texture units?

A: The RTX 4090 D has 14,592 shading units and 456 texture units. The H20 NVL16 has 9,984 shading units and 312 texture units.

Q: What are the power requirements for each?

A: The RTX 4090 D has a 425 W TDP with a suggested 800 W PSU. The H20 NVL16 has a 400 W TDP with a suggested 800 W PSU.