NVIDIA GeForce RTX 4080 SUPER vs NVIDIA H20 Comparison

The NVIDIA GeForce RTX 4080 SUPER and the NVIDIA H20 occupy different corners of the GPU market. The RTX 4080 SUPER is a consumer graphics card built on Ada Lovelace, aimed at high-end desktop rendering and gaming. The H20 is a server accelerator built on Hopper, designed for datacenter compute workloads. The recorded data shows almost no overlap in their intended use cases, and the benchmark results available for the RTX 4080 SUPER cannot be directly compared to the H20, which has no recorded benchmark scores in the database. This analysis relies strictly on the specification sheets and the performance context provided for the RTX 4080 SUPER, while the H20 is assessed through its architectural and memory characteristics.

Where Each One Wins

The RTX 4080 SUPER wins in every scenario involving rasterized graphics, ray tracing, and direct consumer API support. Its benchmark results are extensive: a 3DMark Steel Nomad DX12 score of 6600, a Geekbench OpenCL score of 219065, a Geekbench Vulkan score of 260075, and a Passmark G3D score of 34245. These numbers place it at the 86th percentile among all GPUs in the database, with an average benchmark score of 54209. Its nearest rivals confirm its position: the RTX 4080 sits 0.1% behind, the AMD Radeon Pro W5700X is 1.1% behind, the AMD Radeon RX 6750 GRE 12 GB is 2.7% behind, and the AMD Radeon 8060S is 2.8% behind. This means the RTX 4080 SUPER delivers performance that is competitive with, and slightly ahead of, the RTX 4080 in the recorded averages, while maintaining a clear edge over several AMD options in the same performance tier.

The H20 wins in memory capacity and bandwidth. It has 96 GB of HBM3 memory on a 6144-bit bus, delivering 4.03 TB/s of bandwidth. That is six times the memory capacity of the RTX 4080 SUPER, which has 16 GB of GDDR6X on a 256-bit bus with 736.3 GB/s. For workloads that require holding large datasets in GPU memory, such as large language model inference or massive matrix operations, the H20 is the only viable option between these two. The H20 also leads in FP16 compute: it delivers 79.07 TFLOPS with a 2:1 ratio, whereas the RTX 4080 SUPER delivers 52.22 TFLOPS with a 1:1 ratio. The H20 has 312 tensor cores compared to 320 on the RTX 4080 SUPER, but the H20’s higher FP16 throughput and larger memory pool indicate it is built for dense compute rather than graphics.

The RTX 4080 SUPER wins in pixel and texture throughput. Its pixel rate is 285.6 GPixel/s versus 47.52 GPixel/s on the H20, and its texture rate is 816.0 GTexel/s versus 617.8 GTexel/s. The H20 has only 24 ROPs, while the RTX 4080 SUPER has 112. This makes the H20 poorly suited for any rasterization-heavy task, and it has no display outputs at all. The RTX 4080 SUPER also holds the advantage in raw FP32 performance: 52.22 TFLOPS versus 39.54 TFLOPS on the H20. For single-precision floating-point math, which is common in gaming and many scientific applications, the RTX 4080 SUPER is ahead by roughly 32%.

The Verdict

The recorded data supports a clear split: pick the RTX 4080 SUPER for any client-side workload involving graphics, real-time rendering, or API compatibility. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and it has both HDMI 2.1 and DisplayPort 1.4a outputs. The H20 has no API support listed, no outputs, and its DirectX, OpenGL, and Vulkan entries are all N/A. The RTX 4080 SUPER is also end-of-life, but remains active in the benchmark database with a percentile rank of 86, which indicates strong standing against all recorded GPUs.

Pick the H20 for server-side compute where memory size and bandwidth are the primary constraints. Its 96 GB of HBM3 and 4.03 TB/s bandwidth are unmatched by the RTX 4080 SUPER. The H20 is active in production, uses a PCIe 5.0 x16 interface, and has a higher TDP of 500 W compared to 320 W. The H20 has no launch MSRP recorded, so pricing is not part of this analysis. Its average benchmark score is 0, and it has no nearest rivals in the database, meaning there is no direct performance comparison available. The H20’s strength is structural: more memory, faster memory, and higher FP16 throughput.

For a desktop builder, the choice is obvious. The RTX 4080 SUPER offers a complete feature set with a launch MSRP of 999 USD, triple-slot cooling, and a single 16-pin power connector. The H20 is an SXM module with no dimensions recorded and no power connector listed, which indicates it is not designed for consumer installation. The RTX 4080 SUPER has a suggested PSU of 700 W, while the H20 suggests 900 W. The data confirms that these are different products for different markets, and there is no scenario where they are direct substitutes.

Head-to-Head Benchmarks

There are no head-to-head benchmark tests recorded between these two GPUs. The database lists zero wins for each side in direct comparisons. Instead, the analysis must rely on the individual specification sheets and the RTX 4080 SUPER’s benchmark results. The RTX 4080 SUPER has ten recorded benchmark scores, while the H20 has none. This lack of overlapping data means that any comparison is indirect, based on architectural capabilities rather than measured performance.

Looking at compute throughput, the RTX 4080 SUPER delivers 52.22 TFLOPS in FP32, while the H20 delivers 39.54 TFLOPS. That is a 32% advantage for the RTX 4080 SUPER in single-precision workloads. In FP16, the H20 flips the result: 79.07 TFLOPS versus 52.22 TFLOPS on the RTX 4080 SUPER, a 51% advantage for the H20. The H20’s FP16 is achieved with a 2:1 ratio, meaning it processes two FP16 operations per clock per core, whereas the RTX 4080 SUPER processes FP16 at a 1:1 ratio. This is a significant architectural difference that favors the H20 for mixed-precision AI training and inference.

Memory bandwidth is where the H20 dominates. The H20’s 4.03 TB/s is more than five times the RTX 4080 SUPER’s 736.3 GB/s. The H20 uses HBM3 with a 6144-bit bus, while the RTX 4080 SUPER uses GDDR6X with a 256-bit bus. The memory clock rates also differ: the H20 runs at 1313 MHz with 5.3 Gbps effective, while the RTX 4080 SUPER runs at 1438 MHz with 23 Gbps effective. Despite the higher effective speed on the RTX 4080 SUPER, the H20’s vastly wider bus delivers far more aggregate bandwidth.

In pixel processing, the RTX 4080 SUPER is over six times faster: 285.6 GPixel/s versus 47.52 GPixel/s. Texture rate is closer, with the RTX 4080 SUPER at 816.0 GTexel/s and the H20 at 617.8 GTexel/s, a 32% lead for the RTX 4080 SUPER. The H20 has 312 TMUs, while the RTX 4080 SUPER has 320, so the texture rate difference is modest. The ROP count is the largest disparity: 112 on the RTX 4080 SUPER versus 24 on the H20. This confirms that the H20 is not built for rasterization.

FAQ

Q: Which GPU has more memory?

A: The NVIDIA H20 has 96 GB of HBM3 memory, while the NVIDIA GeForce RTX 4080 SUPER has 16 GB of GDDR6X.

Q: Which GPU is faster in FP32 compute?

A: The RTX 4080 SUPER delivers 52.22 TFLOPS in FP32, compared to 39.54 TFLOPS on the H20.

Q: Does the H20 support DirectX or Vulkan?

A: No. The H20 lists DirectX, OpenGL, and Vulkan as N/A, and it has no display outputs. The RTX 4080 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What is the memory bandwidth difference?

A: The H20 provides 4.03 TB/s of bandwidth, while the RTX 4080 SUPER provides 736.3 GB/s. The H20’s bandwidth is over five times higher.

Q: Which GPU has a higher transistor count?

A: The H20 has 80,000 million transistors on an 814 mm² die. The RTX 4080 SUPER has 45,900 million transistors on a 379 mm² die.

Q: What is the TDP of each GPU?

A: The RTX 4080 SUPER has a TDP of 320 W with a suggested PSU of 700 W. The H20 has a TDP of 500 W with a suggested PSU of 900 W.

Architecture Differences

The RTX 4080 SUPER is built on the AD103 chip using the Ada Lovelace architecture. The H20 is built on the GH100 chip using the Hopper architecture. Both use a 5 nm process from TSMC, but the die sizes differ significantly: the AD103 is 379 mm², while the GH100 is 814 mm². The transistor counts also differ: the RTX 4080 SUPER has 45,900 million transistors, while the H20 has 80,000 million. Transistor density is higher on the RTX 4080 SUPER at 121.1 million per mm², compared to 98.3 million per mm² on the H20. This suggests the Ada Lovelace design is more compact, while the Hopper design uses a larger die for more memory and compute resources.

The RTX 4080 SUPER has 10240 shading units, 320 TMUs, and 112 ROPs. It also has 80 RT cores and 320 tensor cores. The H20 has 9984 shading units, 312 TMUs, and only 24 ROPs. It has no RT cores listed, and 312 tensor cores. The absence of RT cores and the low ROP count indicate that the H20 is not intended for real-time ray tracing or traditional graphics output. The H20’s architecture prioritizes tensor operations and memory throughput.

The RTX 4080 SUPER uses a 256-bit memory bus with GDDR6X, while the H20 uses a 6144-bit bus with HBM3. This is a fundamental difference in memory technology. The H20’s memory clock is lower at 1313 MHz with 5.3 Gbps effective, versus 1438 MHz with 23 Gbps effective on the RTX 4080 SUPER, but the H20’s bus width compensates with far higher total bandwidth.

The RTX 4080 SUPER supports PCIe 4.0 x16, while the H20 supports PCIe 5.0 x16. The RTX 4080 SUPER has display outputs (1x HDMI 2.1 and 3x DisplayPort 1.4a), while the H20 has no outputs. The RTX 4080 SUPER is triple-slot, while the H20 is an SXM module, which is a different form factor for server installation.

Specification Differences

The RTX 4080 SUPER has a base clock of 2295 MHz and a boost clock of 2550 MHz. The H20 has a base clock of 1830 MHz and a boost clock of 1980 MHz. The RTX 4080 SUPER has a higher pixel rate (285.6 GPixel/s versus 47.52 GPixel/s) and a higher texture rate (816.0 GTexel/s versus 617.8 GTexel/s). The RTX 4080 SUPER has 112 ROPs, while the H20 has 24. The RTX 4080 SUPER has 10240 shading units, while the H20 has 9984.

The H20 has more memory: 96 GB versus 16 GB. The H20 has a wider memory bus: 6144 bit versus 256 bit. The H20 has higher memory bandwidth: 4.03 TB/s versus 736.3 GB/s. The H20 has higher FP16 performance: 79.07 TFLOPS versus 52.22 TFLOPS. The RTX 4080 SUPER has higher FP32 performance: 52.22 TFLOPS versus 39.54 TFLOPS.

The RTX 4080 SUPER has a TDP of 320 W and uses a 1x 16-pin power connector, with a suggested PSU of 700 W. The H20 has a TDP of 500 W, no power connector listed, and a suggested PSU of 900 W. The RTX 4080 SUPER has a launch MSRP of 999 USD, while the H20 has no launch MSRP recorded. The RTX 4080 SUPER is end-of-life, while the H20 is active in production. The RTX 4080 SUPER has a release date of 2024-01-30, and the H20 has a release date of 2024-01-31. The RTX 4080 SUPER measures 310 mm in length, 140 mm in height, and 61 mm in width. The H20 has no dimensions recorded.