AMD Radeon RX 7800M vs NVIDIA H20 Comparison

The AMD Radeon RX 7800M and NVIDIA H20 occupy entirely different corners of the hardware landscape, and the recorded data makes that separation explicit. The RX 7800M is a mobile graphics solution from the Radeon RX 7000 series, built on the Navi 32 chip with RDNA 3.0 architecture, while the H20 is a server accelerator based on the GH100 chip with Hopper architecture. The H20 carries no benchmark entries in the database, which limits direct performance comparison, but the specification sheets reveal fundamental design philosophies that shape their respective roles.

FAQ

Q: What is the process node and foundry for both GPUs?

A: Both the AMD Radeon RX 7800M and the NVIDIA H20 are manufactured on a 5 nm process at TSMC. The RX 7800M packs 28,100 million transistors on a 346 mm² die, while the H20 crams 80,000 million transistors onto an 814 mm² die.

Q: How much memory does each card have, and what type?

A: The RX 7800M features 12 GB of GDDR6 memory on a 192-bit bus, delivering 432.0 GB/s of bandwidth. The H20 offers 96 GB of HBM3 memory on a 6144-bit bus, providing 4.03 TB/s of bandwidth.

Q: What are the base and boost clocks for these GPUs?

A: The RX 7800M runs at a base clock of 1295 MHz and boosts to 2335 MHz, with a game clock of 2145 MHz. The H20 has a base clock of 1830 MHz and a boost clock of 1980 MHz.

Q: Which card has a higher FP32 compute rating?

A: The H20 delivers 39.54 TFLOPS of FP32 performance, while the RX 7800M produces 35.87 TFLOPS. The H20 leads by roughly 10% in this metric.

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

A: The RX 7800M has a TDP of 180 W and uses no power connectors, functioning as an integrated graphics package. The H20 has a TDP of 500 W and requires a suggested PSU of 900 W.

Q: Are there any benchmark scores available for the NVIDIA H20?

A: The database contains no benchmark entries for the H20, and its average benchmark score is recorded as 0, with a percentile rank of 50 among all GPUs. The RX 7800M has multiple benchmark scores across DirectX and compute tests.

Architecture Differences

The architectural split between these two parts is stark. The RX 7800M uses RDNA 3.0, the latest graphics architecture from AMD, built around the Navi 32 chip with the codename Wheat Nas. It belongs to the Navi Mobile generation, specifically the RX 7000M family, and targets portable devices. The H20, in contrast, uses the Hopper architecture from NVIDIA, built around the GH100 chip, and belongs to the Server Hopper generation, designated as Hxx series parts.

The transistor counts tell the story of their divergent purposes. The RX 7800M has 28,100 million transistors on a 346 mm² die, resulting in a transistor density of 81.2M per mm². The H20 carries 80,000 million transistors on an 814 mm² die, achieving a density of 98.3M per mm². The H20's larger die and higher transistor count reflect its server-oriented design, where compute density and memory capacity outweigh power efficiency.

Clock behavior differs significantly. The RX 7800M boosts to 2335 MHz with a game clock of 2145 MHz, while the H20 has a more conservative boost of 1980 MHz. The H20's lower clocks align with its higher TDP of 500 W, suggesting the design prioritizes sustained compute workloads over burst gaming performance. The RX 7800M, at 180 W, operates within a mobile power envelope.

Memory architecture is where the two diverge most dramatically. The RX 7800M uses 12 GB of GDDR6 on a 192-bit bus, yielding 432.0 GB/s. The H20 uses 96 GB of HBM3 on a 6144-bit bus, delivering 4.03 TB/s, nearly ten times the bandwidth. The H20's memory subsystem is built for massive data movement in AI and high-performance computing, while the RX 7800M's memory is sized for gaming workloads on portable devices.

Compute resources also differ. The RX 7800M has 3840 shading units, 240 TMUs, and 96 ROPs, with 60 ray tracing cores and no tensor cores. The H20 has 9984 shading units, 312 TMUs, and only 24 ROPs, with 312 tensor cores and no dedicated ray tracing cores. The H20's tensor core count, matching its TMU count, indicates a focus on matrix operations, while the RX 7800M's higher ROP count supports rasterization-heavy graphics tasks.

The Verdict

The data points to two products with no practical overlap. The RX 7800M is a mobile GPU for gaming and graphics workloads, evidenced by its DirectX 12 Ultimate support, Vulkan 1.4, OpenGL 4.6, and portable device-dependent display outputs. The H20 is a server accelerator with no display outputs, no DirectX support, no OpenGL support, and no Vulkan support, making it unsuitable for any traditional graphics rendering tasks.

The benchmark results for the RX 7800M show a percentile rank of 73 among all GPUs, with an average benchmark score of 27883. Its nearest rivals include the AMD Radeon Pro Vega 20 at 27839 (0.2% difference), the AMD Radeon Pro W5500X at 27973 (-0.3%), the NVIDIA GeForce GTX 980 Ti at 28020 (-0.5%), and the AMD FirePro S7150 at 28117 (-0.8%). These margins are minimal, placing the RX 7800M in a tight performance cluster.

The H20 has no benchmark data, no average score, and no nearest rivals. Its percentile rank of 50 is the default baseline, indicating the database has no recorded performance information for this part. The absence of benchmark entries means any performance claims about the H20 would lack empirical support from the recorded data.

For users seeking a mobile graphics solution with gaming capabilities, the RX 7800M is the only viable option between these two. For server deployments requiring tensor core acceleration and massive memory capacity, the H20's specifications align with that role, though its actual performance remains unmeasured in the database.

Specification Differences

The two GPUs differ across nearly every specification field. The RX 7800M comes from the Radeon RX 7000 series, while the H20 has no series designation. The RX 7800M uses the Navi 32 chip with RDNA 3.0 architecture and the codename Wheat Nas, while the H20 uses the GH100 chip with Hopper architecture and no codename.

Process nodes match at 5 nm from TSMC, but transistor counts differ: 28,100 million for the RX 7800M versus 80,000 million for the H20. Die sizes are 346 mm² versus 814 mm², and transistor densities are 81.2M per mm² versus 98.3M per mm².

Clock speeds show the RX 7800M with a base of 1295 MHz, boost of 2335 MHz, and game clock of 2145 MHz. The H20 has a base of 1830 MHz and boost of 1980 MHz, with no game clock. Memory clocks are 2250 MHz (18 Gbps effective) for the RX 7800M versus 1313 MHz (5.3 Gbps effective) for the H20.

Memory configurations: 12 GB GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth versus 96 GB HBM3 on a 6144-bit bus with 4.03 TB/s. The RX 7800M has 3840 shading units, 240 TMUs, 96 ROPs, and 60 RT cores. The H20 has 9984 shading units, 312 TMUs, 24 ROPs, no RT cores, and 312 tensor cores.

Pixel rates are 224.2 GPixel/s for the RX 7800M versus 47.52 GPixel/s for the H20. Texture rates are 560.4 GTexel/s versus 617.8 GTexel/s. FP32 performance is 35.87 TFLOPS versus 39.54 TFLOPS. FP16 performance is 35.87 TFLOPS (1:1) for the RX 7800M versus 79.07 TFLOPS (2:1) for the H20.

TDP values are 180 W versus 500 W. The RX 7800M has an IGP slot width with no power connectors, while the H20 uses an SXM Module with a suggested PSU of 900 W. Bus interfaces are PCIe 4.0 x16 versus PCIe 5.0 x16. Display outputs are portable device dependent for the RX 7800M and none for the H20.

API support: the RX 7800M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The H20 has no API support recorded. Release dates are 2024-09-10 for the RX 7800M and 2024-01-31 for the H20. The RX 7800M's predecessor is Polaris Mobile with no successor, while the H20's predecessor is Server Ada and its successor is Server Blackwell.

Head-to-Head Benchmarks

The database lists no head-to-head benchmark results between these two GPUs. The RX 7800M has ten recorded benchmark scores, while the H20 has none. The absence of H20 benchmark data prevents any direct performance comparison.

The RX 7800M's benchmark results show its strongest performance in compute-oriented tests. Its Geekbench Vulkan score is 126668, and its Geekbench OpenCL score is 120778. The Passmark G3D score is 17613, with a GPU compute score of 9342. Lower DirectX scores include 176 for DirectX 11, 99 for DirectX 10, 89 for DirectX 12, and 174 for DirectX 9. The Passmark G2D score is 892, and the 3DMark Steel Nomad DX12 score is 2994.

Without H20 benchmark scores, the only quantitative comparison comes from specification-derived metrics. The H20's FP32 of 39.54 TFLOPS exceeds the RX 7800M's 35.87 TFLOPS by 3.67 TFLOPS, a 10.2% advantage. The H20's FP16 of 79.07 TFLOPS is more than double the RX 7800M's 35.87 TFLOPS, reflecting the H20's 2:1 FP16 ratio versus the RX 7800M's 1:1 ratio.

Memory bandwidth heavily favors the H20: 4.03 TB/s versus 432.0 GB/s, a 9.3 times difference. Texture rate slightly favors the H20 at 617.8 GTexel/s versus 560.4 GTexel/s, a 10.2% difference. Pixel rate strongly favors the RX 7800M at 224.2 GPixel/s versus 47.52 GPixel/s, a 4.7 times difference.

Where Each One Wins

The RX 7800M wins in scenarios requiring rasterization and pixel output. Its pixel rate of 224.2 GPixel/s dwarfs the H20's 47.52 GPixel/s, and its 96 ROPs versus 24 ROPs confirms a design optimized for filling framebuffers. The RX 7800M's DirectX 12 Ultimate support, Vulkan 1.4, and OpenGL 4.6 make it suitable for gaming and graphics applications, while the H20 has no graphics API support at all.

The RX 7800M also wins on power efficiency. Its 180 W TDP with no power connectors suits mobile and integrated deployments, whereas the H20's 500 W TDP and 900 W suggested PSU require substantial server infrastructure. The RX 7800M's PCIe 4.0 x16 interface is more common in consumer platforms, while the H20's PCIe 5.0 x16 targets newer server platforms.

The H20 wins in compute density and memory capacity. Its 96 GB of HBM3 memory with 4.03 TB/s bandwidth provides massive data throughput for large models and datasets. Its 312 tensor cores and 79.07 TFLOPS FP16 performance indicate a design aimed at AI inference and training workloads. The H20's 9984 shading units and 312 TMUs give it higher raw compute and texture throughput than the RX 7800M.

The H20 also wins on FP32 compute, delivering 39.54 TFLOPS versus the RX 7800M's 35.87 TFLOPS. Its transistor count of 80,000 million and die size of 814 mm² represent a more complex, more capable compute device. The H20's release date of 2024-01-31 precedes the RX 7800M's 2024-09-10, and its successor, Server Blackwell, is already designated, while the RX 7800M has no successor listed.

The RX 7800M's benchmark percentile of 73 versus the H20's 50 further illustrates the measurement gap. The RX 7800M's average benchmark score of 27883 places it among mid-range GPUs, while the H20's score of 0 reflects no recorded performance data. Users seeking a graphics card with verified gaming performance should choose the RX 7800M. Users requiring a server accelerator with tensor cores and high memory bandwidth should consider the H20, though its actual performance remains unverified in the database.