NVIDIA H20 vs NVIDIA RTX 4000 Mobile Ada Generation Comparison

Head-to-Head Benchmarks

The recorded database contains no head-to-head benchmark results for the NVIDIA H20 versus the NVIDIA RTX 4000 Mobile Ada Generation. Both entries show an empty benchmark array, zero wins each, and an average benchmark score of zero. The percentileVsAllGpus field for both GPUs is 50, indicating that neither product has a measured performance percentile relative to the broader GPU population in the database at this time.

Without benchmark scores, no direct numerical comparison of compute performance can be made from the recorded data. The absence of results does not imply parity; it simply reflects that no standardized test data has been captured for either product in this database. The H20 has zero wins and the RTX 4000 Mobile Ada has zero wins, confirming that no head-to-head competition has been logged.

The database does, however, contain substantial architectural and specification data for both units, which allows for a structural comparison. The H20 is a server-grade SXM module with a TDP of 500 W, while the RTX 4000 Mobile Ada is a mobile integrated graphics processor (IGP) with a TDP of 110 W. The power envelope difference is stark: the H20 consumes more than four times the power of the RTX 4000 Mobile Ada. This alone indicates that the two products target entirely different operating environments and use cases.

The H20 features a much larger memory footprint at 96 GB of HBM3, compared to 12 GB of GDDR6 on the RTX 4000 Mobile Ada. Memory bandwidth scales accordingly: 4.03 TB/s versus 432.0 GB/s, a nearly tenfold difference. The bus width for the H20 is 6144 bit, while the RTX 4000 Mobile Ada uses 192 bit. These figures indicate that the H20 is designed for massive data throughput, while the mobile part prioritizes efficiency and physical integration.

Compute throughputs also differ substantially. The H20 delivers 39.54 TFLOPS FP32 and 79.07 TFLOPS FP16 with a 2:1 ratio. The RTX 4000 Mobile Ada provides 24.72 TFLOPS FP32 and 24.72 TFLOPS FP16 with a 1:1 ratio. The H20 is roughly 60% ahead in FP32 and more than three times ahead in FP16. Texture and pixel rates follow a different pattern: the H20 has a texture rate of 617.8 GTexel/s versus 386.3 GTexel/s for the mobile part, but the pixel rate favors the RTX 4000 Mobile Ada at 133.2 GPixel/s versus 47.52 GPixel/s for the H20.

Clock speeds are also recorded. The H20 runs at a base clock of 1830 MHz and a boost clock of 1980 MHz. The RTX 4000 Mobile Ada runs at 1290 MHz base and 1665 MHz boost. The H20 has higher clocks, but the mobile part's smaller die and lower power budget suggest a different design philosophy.

Where Each One Wins

Based strictly on the recorded data, the NVIDIA H20 wins in raw compute throughput, memory capacity, memory bandwidth, and FP16 performance. Its FP32 figure of 39.54 TFLOPS exceeds the RTX 4000 Mobile Ada's 24.72 TFLOPS by approximately 60%. In FP16, the H20's 79.07 TFLOPS is more than triple the mobile part's 24.72 TFLOPS. The H20 also has a substantial advantage in texture rate at 617.8 GTexel/s versus 386.3 GTexel/s.

The H20's memory subsystem is categorically superior. With 96 GB of HBM3, it offers eight times the capacity of the RTX 4000 Mobile Ada's 12 GB of GDDR6. Bandwidth is 4.03 TB/s versus 432.0 GB/s, a difference of roughly 9.3 times. The 6144-bit bus versus the 192-bit bus explains this disparity. For workloads that require large models or datasets resident in GPU memory, the H20 is the only option between the two.

The RTX 4000 Mobile Ada wins in pixel fill rate, delivering 133.2 GPixel/s against the H20's 47.52 GPixel/s. This is a 2.8 times advantage. The mobile part also has more ROPs: 80 versus 24. This suggests that the RTX 4000 Mobile Ada is better suited for rasterization-heavy tasks such as traditional 3D rendering, despite its lower overall compute throughput.

The RTX 4000 Mobile Ada also supports a full API stack: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The H20 lists all APIs as N/A, meaning the database records no graphics API support for the server part. The mobile GPU also has 58 RT cores, while the H20 lists no RT core count. For ray-traced workloads, the RTX 4000 Mobile Ada has explicit hardware support; the H20's data shows no such capability.

The mobile part uses PCIe 4.0 x16, while the H20 uses PCIe 5.0 x16. The newer bus standard on the H20 allows for higher host transfer rates, though the mobile part's portable device dependent display outputs enable direct video output, which the H20 lacks entirely.

Architecture Differences

The NVIDIA H20 is built on the GH100 chip using the Hopper architecture, manufactured on a 5 nm process at TSMC. The RTX 4000 Mobile Ada uses the AD104 chip with the Ada Lovelace architecture, also on a 5 nm TSMC process. Both share the same process node and foundry, but the implementations diverge sharply.

Transistor counts differ by a factor of more than two. The H20 packs 80,000 million transistors on a die of 814 mm², yielding a transistor density of 98.3 million per mm². The RTX 4000 Mobile Ada has 35,800 million transistors on a 294 mm² die, with a higher density of 121.8 million per mm². The mobile chip achieves greater density, but the H20's much larger die allows for a dramatically higher absolute transistor count.

Shader unit counts follow the die size trend. The H20 has 9984 shading units, 312 TMUs, and 24 ROPs. The RTX 4000 Mobile Ada has 7424 shading units, 232 TMUs, and 80 ROPs. The H20 has roughly 34% more shading units and 34% more TMUs, but the mobile part has more than three times the ROP count.

Tensor core counts are 312 on the H20 and 232 on the RTX 4000 Mobile Ada. The H20's tensor cores are tied to its FP16 throughput of 79.07 TFLOPS with a 2:1 ratio, while the mobile part's tensor cores deliver 24.72 TFLOPS FP16 with a 1:1 ratio. The H20's FP16 advantage is thus amplified by both a higher core count and a more aggressive FP16-to-FP32 ratio.

Ray tracing hardware exists only on the RTX 4000 Mobile Ada, which lists 58 RT cores. The H20 records no RT core count. This aligns with the API support difference: the mobile part supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the H20 records N/A for all three. The H20 is a compute-focused server part with no display outputs, while the RTX 4000 Mobile Ada has portable device dependent display outputs.

Memory architecture differs fundamentally. The H20 uses HBM3 with 96 GB capacity and a 6144-bit bus. The RTX 4000 Mobile Ada uses GDDR6 with 12 GB on a 192-bit bus. Memory clock rates are recorded as 1313 MHz with 5.3 Gbps effective for the H20 and 2250 MHz with 18 Gbps effective for the mobile part. The effective data rate is higher on the mobile part per pin, but the H20's enormous bus width produces far greater aggregate bandwidth.

Power and physical configuration are also distinct. The H20 is an SXM module with a 500 W TDP and a suggested PSU of 900 W. The RTX 4000 Mobile Ada is an IGP with a 110 W TDP and no power connectors. The H20 uses PCIe 5.0 x16, while the mobile part uses PCIe 4.0 x16. Release dates differ: the H20 launched on 2024-01-31, while the RTX 4000 Mobile Ada launched on 2023-03-20. The H20's predecessor is Server Ada and its successor is Server Blackwell; the mobile part's predecessor is Ampere-MW and its successor is Blackwell-MW.

The Verdict

The data indicates that the NVIDIA H20 is a server-grade compute accelerator designed for high-throughput workloads with massive memory requirements. Its 500 W TDP, SXM form factor, 96 GB HBM3, and 4.03 TB/s bandwidth position it for data center tasks such as large-scale AI inference or training, where memory capacity and FP16 throughput are paramount. The absence of display outputs and graphics API support confirms that it is not intended for any form of direct rendering or user-facing graphics work.

The NVIDIA RTX 4000 Mobile Ada Generation is a mobile GPU with a 110 W TDP, integrated into a laptop or mobile workstation. Its 12 GB GDDR6, 432.0 GB/s bandwidth, and full support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 make it suitable for professional mobile graphics, ray tracing, and rasterization. Its higher pixel rate of 133.2 GPixel/s and 80 ROPs give it a clear advantage in fill-rate-bound scenarios.

For compute-heavy workloads that fit within the H20's architecture, the H20 is the stronger part. The FP32 advantage of 60% and the FP16 advantage of over 200% are decisive for general compute. The memory capacity difference is even more pronounced: 96 GB versus 12 GB means the H20 can hold datasets eight times larger without spilling to system memory or disk.

For graphics workloads, the RTX 4000 Mobile Ada is the only viable option between the two. It has RT cores, graphics API support, display outputs, and a pixel rate nearly three times higher. The H20 cannot be used for any display or graphics purpose according to the recorded data.

Users requiring a server accelerator for AI or high-performance computing should select the H20. Users requiring a mobile GPU for rendering, ray tracing, or any graphics API workload should select the RTX 4000 Mobile Ada. The two products do not compete in the same segment; the data shows a clear division between server compute and mobile graphics.

FAQ

Q: Which GPU has higher FP32 performance?

A: The NVIDIA H20 has 39.54 TFLOPS FP32, while the RTX 4000 Mobile Ada has 24.72 TFLOPS. The H20 is approximately 60% higher.

Q: What is the FP16 performance difference?

A: The H20 delivers 79.07 TFLOPS FP16 with a 2:1 ratio. The RTX 4000 Mobile Ada delivers 24.72 TFLOPS FP16 with a 1:1 ratio. The H20's FP16 throughput is more than triple the mobile part's.

Q: Which GPU has more memory?

A: The H20 has 96 GB of HBM3. The RTX 4000 Mobile Ada has 12 GB of GDDR6. The H20's capacity is eight times larger.

Q: Does the H20 support ray tracing?

A: The database records no RT cores for the H20. The RTX 4000 Mobile Ada has 58 RT cores and supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. The H20 lists all graphics APIs as N/A.

Q: What are the power requirements?

A: The H20 has a TDP of 500 W and a suggested PSU of 900 W. The RTX 4000 Mobile Ada has a TDP of 110 W and no power connectors.

Q: Which GPU has a higher pixel rate?

A: The RTX 4000 Mobile Ada has a pixel rate of 133.2 GPixel/s with 80 ROPs. The H20 has 47.52 GPixel/s with 24 ROPs. The mobile part is roughly 2.8 times higher.