NVIDIA GeForce RTX 4080 Mobile vs NVIDIA H20 NVL16 Comparison

The Verdict

The recorded data presents an unusual comparison: the NVIDIA GeForce RTX 4080 Mobile is a fully benchmarked consumer mobile part, while the NVIDIA H20 NVL16 is a server accelerator with no benchmark scores in the database. The RTX 4080 Mobile holds an average benchmark score of 38135 and sits at the 81st percentile of all GPUs. The H20 NVL16 has an average benchmark score of 0 and sits at the 50th percentile, a position that reflects the absence of recorded performance data rather than measured capability.

For users seeking a mobile gaming or workstation GPU with validated performance metrics, the RTX 4080 Mobile is the only option with direct benchmark evidence. The data shows it delivers a balanced set of scores across DirectX, OpenCL, and Vulkan workloads. For server deployments requiring large memory capacity and high compute throughput, the H20 NVL16 offers 96 GB of HBM3 memory and 39.54 TFLOPS of FP32 performance, but the database contains no benchmark results to confirm its real-world standing. The verdict from the data is clear: the RTX 4080 Mobile is the choice when measured performance matters, while the H20 NVL16 is the choice when memory capacity and server form factor dominate, with the understanding that its performance profile remains unverified in this database.

Architecture Differences

The two GPUs come from separate NVIDIA architectures. The RTX 4080 Mobile uses the AD104 chip built on Ada Lovelace architecture, fabricated by TSMC on a 5 nm process. The H20 NVL16 uses the GH100 chip built on Hopper architecture, also on a 5 nm TSMC process. Both share the same node, but the physical implementations diverge sharply.

The transistor counts reveal the scale difference. The H20 NVL16 integrates 80,000 million transistors on a 814 mm² die, while the RTX 4080 Mobile integrates 35,800 million transistors on a 294 mm² die. The transistor density favors the mobile part: the RTX 4080 Mobile achieves 121.8M transistors per mm², while the H20 NVL16 reaches 98.3M per mm². This suggests the Ada Lovelace chip packs more logic into less silicon, while the Hopper chip uses a larger area for server-oriented features.

Clock speeds also differ. The H20 NVL16 runs a base clock of 1830 MHz and a boost clock of 1980 MHz. The RTX 4080 Mobile runs a base clock of 1290 MHz and a boost clock of 1665 MHz. The server part operates at higher frequencies, which aligns with its higher thermal design power of 400 W versus 110 W for the mobile part. The RTX 4080 Mobile uses no power connectors and is integrated into the motherboard as an IGP, while the H20 NVL16 is an SXM module with a suggested PSU of 800 W.

The API support differs completely. The RTX 4080 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The H20 NVL16 reports N/A for DirectX, OpenGL, and Vulkan, reflecting its server-focused design with no display outputs. The bus interfaces also differ: the mobile part uses PCIe 4.0 x16, while the server part uses PCIe 5.0 x16.

Where Each One Wins

The RTX 4080 Mobile wins in every recorded benchmark category, simply because the H20 NVL16 has no recorded benchmark scores. The database shows nine benchmark results for the RTX 4080 Mobile, spanning Geekbench and Passmark suites. Its highest score is 159575 in Geekbench OpenCL, followed by 145807 in Geekbench Vulkan. In Passmark tests, it scores 24926 in G3D, 11191 in GPU Compute, 929 in G2D, 286 in DirectX 9, 244 in DirectX 11, 157 in DirectX 10, and 96 in DirectX 12.

The H20 NVL16 has an empty benchmark array, so it cannot claim wins in any measured test. However, the specification data indicates where it would likely excel in unmeasured scenarios. The H20 NVL16 offers 96 GB of HBM3 memory with a 6144-bit bus and 4.03 TB/s bandwidth. The RTX 4080 Mobile offers 12 GB of GDDR6 memory on a 192-bit bus with 432.0 GB/s bandwidth. For workloads that fit within 12 GB, the mobile part is the only one with performance evidence. For workloads that require tens of gigabytes of memory, the H20 NVL16 has a clear capacity advantage that no benchmark in the database contradicts.

The compute capabilities also split. The H20 NVL16 delivers 39.54 TFLOPS of FP32 and 79.07 TFLOPS of FP16 with a 2:1 ratio. The RTX 4080 Mobile delivers 24.72 TFLOPS of FP32 and 24.72 TFLOPS of FP16 with a 1:1 ratio. The H20 NVL16 has nearly double the FP16 throughput, which matters for AI inference and training workloads. The RTX 4080 Mobile has 58 ray tracing cores and 232 tensor cores, while the H20 NVL16 lists 312 tensor cores and no ray tracing cores, reinforcing the server part's compute orientation.

FAQ

Q: Which GPU has more shading units?

A: The H20 NVL16 has 9984 shading units, while the RTX 4080 Mobile has 7424 shading units. The server part also leads in texture mapping units, with 312 versus 232, and in tensor cores, with 312 versus 232.

Q: What memory capacity does each GPU offer?

A: The H20 NVL16 offers 96 GB of HBM3 memory with a 6144-bit bus and 4.03 TB/s bandwidth. The RTX 4080 Mobile offers 12 GB of GDDR6 memory with a 192-bit bus and 432.0 GB/s bandwidth.

Q: How do the clock speeds compare?

A: The H20 NVL16 runs at a base clock of 1830 MHz and a boost clock of 1980 MHz. The RTX 4080 Mobile runs at a base clock of 1290 MHz and a boost clock of 1665 MHz. The server part operates at higher frequencies.

Q: Does the H20 NVL16 have any benchmark scores in the database?

A: No. The benchmark array for the H20 NVL16 is empty, and its average benchmark score is 0. The RTX 4080 Mobile has nine recorded benchmark scores with an average of 38135.

Q: What is the thermal design power for each GPU?

A: The H20 NVL16 has a TDP of 400 W and a suggested PSU of 800 W. The RTX 4080 Mobile has a TDP of 110 W and no power connectors, as it is an integrated GPU in a mobile form factor.

Q: Which GPU supports DirectX?

A: Only the RTX 4080 Mobile supports DirectX, specifically DirectX 12 Ultimate (12_2). The H20 NVL16 lists N/A for DirectX, OpenGL, and Vulkan, and has no display outputs.

Head-to-Head Benchmarks

The head-to-head benchmark array contains no entries, and the wins count for both GPUs is zero. This means the database has no direct comparison measurements between the RTX 4080 Mobile and the H20 NVL16. The only performance data available is the standalone benchmark suite for the RTX 4080 Mobile.

The RTX 4080 Mobile's strongest recorded result is in Geekbench OpenCL, where it scores 159575. Its Geekbench Vulkan score is 145807, which indicates strong cross-platform compute performance. In Passmark tests, the G3D score of 24926 places it well above the GPU compute score of 11191, suggesting the part excels in graphics rendering workloads more than in pure compute tasks.

The H20 NVL16 has no scores to compare directly. Its specification sheet suggests it would dominate in memory bandwidth, with 4.03 TB/s versus 432.0 GB/s, a factor of roughly 9.3 times higher. Its FP32 throughput of 39.54 TFLOPS is about 60% higher than the RTX 4080 Mobile's 24.72 TFLOPS. Its FP16 throughput of 79.07 TFLOPS is more than three times the RTX 4080 Mobile's 24.72 TFLOPS. These are computed from the specification fields, not from benchmark runs, so they remain theoretical until the database records actual test results for the H20 NVL16.

The pixel rate comparison favors the mobile part: the RTX 4080 Mobile produces 133.2 GPixel/s, while the H20 NVL16 produces 47.52 GPixel/s. The texture rate favors the server part: the H20 NVL16 achieves 617.8 GTexel/s versus 386.3 GTexel/s for the RTX 4080 Mobile. These metrics reflect their different design goals: the mobile part focuses on rasterization output, while the server part focuses on texture and compute throughput.

Specification Differences

The two GPUs differ across nearly every specification field in the database.

Process and Die: Both use a 5 nm process from TSMC. The H20 NVL16 uses the GH100 chip with 80,000 million transistors on an 814 mm² die. The RTX 4080 Mobile uses the AD104 chip with 35,800 million transistors on a 294 mm² die. Transistor density is 121.8M per mm² for the mobile part and 98.3M per mm² for the server part.

Clocks: The H20 NVL16 has a base clock of 1830 MHz and a boost clock of 1980 MHz. The RTX 4080 Mobile has a base clock of 1290 MHz and a boost clock of 1665 MHz. Memory clocks also differ: the H20 NVL16 runs at 1313 MHz with 5.3 Gbps effective, while the RTX 4080 Mobile runs at 2250 MHz with 18 Gbps effective.

Memory: The H20 NVL16 has 96 GB of HBM3 on a 6144-bit bus with 4.03 TB/s bandwidth. The RTX 4080 Mobile has 12 GB of GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth.

Compute Units: The H20 NVL16 has 9984 shading units, 312 TMUs, and 24 ROPs. The RTX 4080 Mobile has 7424 shading units, 232 TMUs, and 80 ROPs. The H20 NVL16 has 312 tensor cores and no listed ray tracing cores. The RTX 4080 Mobile has 58 ray tracing cores and 232 tensor cores.

Performance Rates: The H20 NVL16 delivers 47.52 GPixel/s and 617.8 GTexel/s. The RTX 4080 Mobile delivers 133.2 GPixel/s and 386.3 GTexel/s. FP32 is 39.54 TFLOPS for the server part and 24.72 TFLOPS for the mobile part. FP16 is 79.07 TFLOPS with a 2:1 ratio for the server part and 24.72 TFLOPS with a 1:1 ratio for the mobile part.

Power and Form: The H20 NVL16 has a TDP of 400 W, uses an SXM module slot, and has a suggested PSU of 800 W. The RTX 4080 Mobile has a TDP of 110 W, uses an IGP slot, and has no power connectors. The H20 NVL16 uses PCIe 5.0 x16, while the RTX 4080 Mobile uses PCIe 4.0 x16.

Outputs and APIs: The H20 NVL16 has no display outputs and lists N/A for DirectX, OpenGL, and Vulkan. The RTX 4080 Mobile has portable device dependent display outputs and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Release and Status: The H20 NVL16 was released on 2025-09-01, while the RTX 4080 Mobile was released on 2023-01-02. Both are listed as Active production status. The H20 NVL16 lists Server Ada as its predecessor and Server Blackwell as its successor. The RTX 4080 Mobile lists GeForce 30 Mobile as its predecessor and GeForce 50 Mobile as its successor.