NVIDIA H20 vs NVIDIA RTX 6000D Comparison

FAQ

Q: What are the core architectural differences between the NVIDIA H20 and the NVIDIA RTX 6000D?

A: The H20 uses the GH100 chip built on the Hopper architecture, while the RTX 6000D uses the GB202 chip based on the Blackwell 2.0 architecture. Both are manufactured by TSMC on a 5 nm process, but the H20 has 80,000 million transistors on an 814 mm² die, whereas the RTX 6000D packs 92,200 million transistors into a smaller 750 mm² die, resulting in higher transistor density for the RTX 6000D (122.9M per mm² versus 98.3M per mm²).

Q: How do their memory subsystems differ?

A: The H20 features 96 GB of HBM3 memory with a 6144-bit bus and 4.03 TB/s bandwidth. The RTX 6000D has 84 GB of GDDR7 memory on a 448-bit bus, delivering 1.40 TB/s. The H20's memory bandwidth is nearly three times higher, but the RTX 6000D uses faster effective memory clocks at 25 Gbps versus 5.3 Gbps effective for the H20.

Q: Which card has higher raw compute throughput?

A: The RTX 6000D delivers 97.04 TFLOPS FP32 and 97.04 TFLOPS FP16 (1:1), while the H20 provides 39.54 TFLOPS FP32 and 79.07 TFLOPS FP16 (2:1). The RTX 6000D is substantially ahead in FP32, with more than double the shading units (19,968 versus 9,984) and double the tensor cores (624 versus 312).

Q: What is the form factor and power requirement for each?

A: The H20 is an SXM module with a 500 W TDP and a suggested PSU of 900 W. The RTX 6000D is a dual-slot card measuring 304 mm in length, 137 mm in height, and 40 mm in width, with a 600 W TDP and a suggested PSU of 1000 W, using a single 16-pin power connector.

Q: What benchmark scores are recorded for the RTX 6000D, and how does it rank?

A: The RTX 6000D scores 3522 in 3DMark Steel Nomad DX12 and 388405 in Geekbench OpenCL, with an average benchmark score of 195964. It sits in the 98th percentile among all GPUs. The H20 has no recorded benchmark scores and a 50th percentile ranking.

Q: Which rival cards are closest to the RTX 6000D in average performance?

A: The nearest rivals include the NVIDIA Tesla V100S PCIe 32 GB (average score 194415, 0.8% behind), the NVIDIA A100 SXM4 40 GB (187147, 4.7% behind), the NVIDIA A100 PCIe 80 GB (207124, 5.4% ahead), and the NVIDIA RTX 5000 Ada Generation (184664, 6.1% behind).

Architecture Differences

The H20 and RTX 6000D represent two distinct NVIDIA architectures with fundamentally different design priorities. The H20 uses the GH100 chip from the Hopper generation, a server-focused design that emphasizes memory capacity and bandwidth for large-scale compute workloads. Its 96 GB of HBM3 memory with a 6144-bit interface provides 4.03 TB/s of bandwidth, which is exceptionally high and suited for data-intensive tasks like large model inference or scientific simulation.

The RTX 6000D, built around the GB202 chip from the Blackwell 2.0 architecture, takes a different approach. It uses 84 GB of GDDR7 memory on a 448-bit bus, offering 1.40 TB/s of bandwidth. While its memory bandwidth is lower, the RTX 6000D compensates with significantly higher compute throughput. Its 19,968 shading units, 624 TMUs, and 192 ROPs dwarf the H20's 9,984 shading units, 312 TMUs, and 24 ROPs. The RTX 6000D also includes 156 RT cores, while the H20 lists none.

Transistor counts tell part of the story. The RTX 6000D packs 92,200 million transistors into a 750 mm² die, achieving a density of 122.9M per mm². The H20 uses 80,000 million transistors across an 814 mm² die, for a density of 98.3M per mm². Both are built on TSMC's 5 nm process, but the RTX 6000D's higher density reflects a more recent design with tighter integration.

Clock speeds also differ noticeably. The H20 has a base clock of 1830 MHz and a boost clock of 1980 MHz. The RTX 6000D runs at 1992 MHz base and 2430 MHz boost, giving it a substantial frequency advantage. Memory clocks are even more divergent: the H20 runs at 1313 MHz with 5.3 Gbps effective speed, while the RTX 6000D uses 1560 MHz with 25 Gbps effective speed.

Feature support separates them further. The RTX 6000D supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and includes four DisplayPort 2.1b outputs. The H20 has no display outputs and lists N/A for all graphics APIs, confirming its server-oriented role. The RTX 6000D is a dual-slot card with a PCIe 5.0 x16 interface, while the H20 is an SXM module, also using PCIe 5.0 x16 but designed for proprietary server platforms.

Both cards are currently active in production. The H20 was released on 2024-01-31, and its predecessor is Server Ada with a successor of Server Blackwell. The RTX 6000D was released on 2025-07-13, with Workstation Ada as its predecessor and no successor listed. The RTX 6000D carries a launch MSRP of 8,565 USD.

Head-to-Head Benchmarks

The head-to-head benchmark data shows no direct comparisons between the H20 and RTX 6000D, as the H20 has no recorded benchmark scores. The RTX 6000D, however, has two specific test results that establish its performance profile.

In 3DMark Steel Nomad DX12, the RTX 6000D scores 3522. This test stresses graphics rendering and compute in a modern API, and the result places the card in the 98th percentile overall. For context, the nearest rival data shows the RTX 6000D's average benchmark score of 195964 is 0.8% higher than the Tesla V100S PCIe 32 GB (194415), 4.7% higher than the A100 SXM4 40 GB (187147), 6.1% higher than the RTX 5000 Ada Generation (184664), and 5.4% lower than the A100 PCIe 80 GB (207124).

In Geekbench OpenCL, the RTX 6000D scores 388405. This test measures general-purpose compute performance across a wide range of workloads, and the result is consistent with the card's high shading unit count and tensor core count. The FP32 throughput of 97.04 TFLOPS and FP16 throughput of 97.04 TFLOPS at a 1:1 ratio indicate that the card does not trade precision for speed, making it suitable for workloads that require consistent performance across different data formats.

The H20's FP16 specification of 79.07 TFLOPS at a 2:1 ratio means it achieves half the rate when calculating FP32 from FP16 operations, implying a different computational balance. Its FP32 figure of 39.54 TFLOPS is less than half of the RTX 6000D's, and its pixel rate of 47.52 GPixel/s is roughly one-tenth of the RTX 6000D's 466.6 GPixel/s. Texture rate follows the same trend: the H20 delivers 617.8 GTexel/s, while the RTX 6000D reaches 1,516.3 GTexel/s.

Given the lack of direct benchmark comparisons, the recorded data positions the RTX 6000D as the clear leader in raw compute and graphics throughput. The H20's strengths lie elsewhere, specifically in memory bandwidth and capacity, which are not directly captured by the available benchmark scores.

Specification Differences

The two cards differ across nearly every major specification category.

Compute units: The H20 has 9,984 shading units, 312 TMUs, and 24 ROPs. The RTX 6000D has 19,968 shading units, 624 TMUs, and 192 ROPs. The RTX 6000D doubles the shading units and TMUs and multiplies ROPs by eight. Tensor cores also double from 312 to 624. The RTX 6000D adds 156 RT cores; the H20 lists none.

Clock speeds: The H20 runs at 1830 MHz base and 1980 MHz boost. The RTX 6000D runs at 1992 MHz base and 2430 MHz boost. Memory clocks are 1313 MHz (5.3 Gbps effective) for the H20 and 1560 MHz (25 Gbps effective) for the RTX 6000D.

Memory: The H20 has 96 GB of HBM3 with a 6144-bit bus and 4.03 TB/s bandwidth. The RTX 6000D has 84 GB of GDDR7 with a 448-bit bus and 1.40 TB/s bandwidth. The H20 has larger capacity and much higher bandwidth, but the RTX 6000D uses newer memory technology with faster effective data rates.

Performance rates: The H20 delivers 47.52 GPixel/s pixel rate and 617.8 GTexel/s texture rate. The RTX 6000D delivers 466.6 GPixel/s and 1,516.3 GTexel/s. FP32 is 39.54 TFLOPS for the H20 versus 97.04 TFLOPS for the RTX 6000D. FP16 is 79.07 TFLOPS (2:1) for the H20 versus 97.04 TFLOPS (1:1) for the RTX 6000D.

Power and physical: The H20 has a 500 W TDP and is an SXM module. The RTX 6000D has a 600 W TDP and is a dual-slot card with dimensions of 304 mm length, 137 mm height, and 40 mm width. The H20 has no power connector listed; the RTX 6000D uses one 16-pin connector. Suggested PSU is 900 W for the H20 and 1000 W for the RTX 6000D.

Outputs and APIs: The H20 has no display outputs and N/A for DirectX, OpenGL, and Vulkan. The RTX 6000D has four DisplayPort 2.1b outputs and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Chip details: The H20 uses the GH100 chip with 80,000 million transistors on an 814 mm² die. The RTX 6000D uses the GB202 chip with 92,200 million transistors on a 750 mm² die. Transistor density is 98.3M per mm² for the H20 and 122.9M per mm² for the RTX 6000D.

Release and status: The H20 was released on 2024-01-31 with a predecessor of Server Ada and successor of Server Blackwell. The RTX 6000D was released on 2025-07-13 with a predecessor of Workstation Ada and no successor. Both are active in production. The RTX 6000D has a launch MSRP of 8,565 USD; the H20 has no listed MSRP.

Where Each One Wins

The RTX 6000D wins in every available benchmark category and in most compute specifications. Its FP32 throughput of 97.04 TFLOPS is more than double the H20's 39.54 TFLOPS, and its FP16 output of 97.04 TFLOPS at a 1:1 ratio exceeds the H20's 79.07 TFLOPS at a 2:1 ratio. The RTX 6000D also dominates in pixel rate (466.6 GPixel/s versus 47.52 GPixel/s) and texture rate (1,516.3 GTexel/s versus 617.8 GTexel/s).

The RTX 6000D's higher clock speeds, more than double the shading units, and eight times the ROPs make it the clear choice for graphics rendering, real-time visualization, and general compute workloads that rely on FP32 performance. Its support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, along with four DisplayPort 2.1b outputs, means it can drive professional display setups and handle graphics APIs directly. The 156 RT cores provide hardware ray tracing capability, which the H20 lacks entirely.

The H20 wins on memory capacity and bandwidth. Its 96 GB of HBM3 memory with 4.03 TB/s bandwidth is a significant advantage for workloads that are memory-bound rather than compute-bound. Large language model inference, scientific simulations with massive datasets, or training runs that require holding substantial data in memory would benefit from the H20's higher capacity and nearly three times the bandwidth of the RTX 6000D. The H20's 6144-bit memory bus is the widest among the two, and its HBM3 technology provides a different access pattern profile than GDDR7.

The H20 also has a lower TDP at 500 W versus 600 W, and a lower suggested PSU at 900 W versus 1000 W, which could simplify power delivery in dense server environments. However, the H20's SXM form factor restricts it to specific server platforms, whereas the RTX 6000D fits into standard dual-slot PCIe configurations.

The benchmark data, however, only records performance for the RTX 6000D. Its 98th percentile ranking and average score of 195964, with a 3DMark Steel Nomad score of 3522 and Geekbench OpenCL score of 388405, show strong performance against its nearest rivals. The H20 has no recorded scores and sits at the 50th percentile, meaning its actual performance relative to the RTX 6000D is not captured in the database.

The Verdict

The recorded data favors the RTX 6000D for almost any workload that requires compute throughput, graphics rendering, or general-purpose processing. Its FP32 and FP16 performance at 97.04 TFLOPS, combined with 19,968 shading units and 624 tensor cores, places it in the 98th percentile of all GPUs. The benchmark results confirm this: a 3DMark Steel Nomad DX12 score of 3522 and a Geekbench OpenCL score of 388405, with an average score of 195964 that beats three of its four nearest rivals by margins ranging from 0.8% to 6.1%.

The H20, by contrast, has no benchmark scores in the database and a 50th percentile ranking. Its strengths are memory-oriented: 96 GB of HBM3, a 6144-bit bus, and 4.03 TB/s of bandwidth. These specifications make it suitable for tasks where data movement dominates over computation, such as large-scale inference or memory-resident datasets. But without recorded benchmark results, its practical performance cannot be verified from the data.

For a builder choosing between these two, the RTX 6000D is the safer pick for standard compute and graphics tasks. It offers a standard dual-slot form factor, PCIe 5.0 x16 connectivity, display outputs, and full graphics API support. The H20 requires an SXM server platform, has no display outputs, and lacks graphics API support, making it unsuitable for any workstation role that involves direct rendering or display.

The RTX 6000D also benefits from a newer release date of 2025-07-13 versus 2024-01-31 for the H20, and it carries a launch MSRP of 8,565 USD. The H20 has no listed price. The RTX 6000D's higher TDP of 600 W and suggested PSU of 1000 W are reasonable for its performance class, and its 304 mm length fits standard workstation chassis.

The H20's advantage in memory bandwidth is real and significant, but it serves a narrow use case. For anyone evaluating these cards on the basis of the available benchmark data, the RTX 6000D is the only one with measurable performance, and it performs at a high level. The H20 remains a specialized server part whose merits are not reflected in the database's recorded metrics.