AMD Steam Deck OLED GPU vs NVIDIA H20 Comparison

FAQ

Q: What are the core architectural differences between the AMD Steam Deck OLED GPU and the NVIDIA H20?

A: The AMD Steam Deck OLED GPU uses the RDNA 2.0 architecture on a 6 nm process, while the NVIDIA H20 uses the Hopper architecture on a 5 nm process. The AMD chip is named Sephiroth, and the NVIDIA chip is GH100.

Q: How do the memory subsystems compare between these two GPUs?

A: The AMD Steam Deck OLED GPU has 16 GB of LPDDR5 memory on a 128-bit bus with 176.0 GB/s bandwidth. The NVIDIA H20 has 96 GB of HBM3 memory on a 6144-bit bus with 4.03 TB/s bandwidth, which is roughly 23 times higher memory bandwidth.

Q: Which GPU has higher raw compute throughput in FP32 operations?

A: The NVIDIA H20 delivers 39.54 TFLOPS FP32 performance, compared to the AMD Steam Deck OLED GPU's 1.638 TFLOPS. The H20 has approximately 24 times higher FP32 throughput.

Q: What are the power requirements for each GPU?

A: The AMD Steam Deck OLED GPU has a 15 W TDP, while the NVIDIA H20 has a 500 W TDP. The H20 also requires a 900 W suggested PSU, whereas the AMD GPU does not list a suggested PSU.

Q: What display outputs does each GPU provide?

A: The AMD Steam Deck OLED GPU provides 1x USB Type-C display output. The NVIDIA H20 has no display outputs, as it is a server-class accelerator.

Q: What is the release timeline for both GPUs?

A: The AMD Steam Deck OLED GPU was released on 2023-11-08, and the NVIDIA H20 was released on 2024-01-31. Both are currently listed as Active in production status.

Architecture Differences

The AMD Steam Deck OLED GPU and NVIDIA H20 represent fundamentally different design philosophies and market targets. The AMD part is built on RDNA 2.0, a graphics-oriented architecture designed for console-class gaming workloads, while the NVIDIA H20 uses the Hopper architecture, which is engineered for server and datacenter acceleration.

The process technology shows a generational gap. AMD uses a 6 nm process from TSMC, while NVIDIA uses a 5 nm process, also from TSMC. The transistor counts differ dramatically: AMD integrates 2,400 million transistors on a 131 mm² die, resulting in a transistor density of 18.3M per mm². NVIDIA packs 80,000 million transistors onto an 814 mm² die, achieving a density of 98.3M per mm². The NVIDIA chip is over 33 times larger in transistor count and over 5 times larger in die area.

The compute pipeline structures diverge significantly. The AMD Steam Deck OLED GPU contains 512 shading units, 32 texture mapping units, 16 raster operation units, and 8 ray tracing cores. The NVIDIA H20 contains 9,984 shading units, 312 texture mapping units, 24 raster operation units, and 312 tensor cores. The NVIDIA H20 does not list dedicated ray tracing cores in its specifications, while the AMD part includes 8 RT cores for real-time ray tracing workloads.

Clock behavior also differs. The AMD GPU operates at a 1000 MHz base clock and 1600 MHz boost clock. The NVIDIA H20 runs at 1830 MHz base and 1980 MHz boost, representing substantially higher operating frequencies.

Memory architecture reflects their divergent roles. The AMD Steam Deck OLED GPU uses 16 GB of LPDDR5 with a 128-bit bus and 176.0 GB/s bandwidth. The NVIDIA H20 uses 96 GB of HBM3 with a 6144-bit bus and 4.03 TB/s bandwidth. The memory clock rates also differ: AMD's memory runs at 1375 MHz (11 Gbps effective), while NVIDIA's runs at 1313 MHz (5.3 Gbps effective), though the H20's much wider bus compensates with far higher aggregate bandwidth.

The API support profiles are distinct. AMD supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3. The NVIDIA H20 lists N/A for DirectX, OpenGL, and Vulkan, indicating it is not designed for traditional graphics API workloads. The AMD GPU provides a USB Type-C display output, while the NVIDIA H20 has no outputs at all.

Physical specifications also separate them. The AMD Steam Deck OLED GPU measures 298 mm in length, 117 mm in height, and 49 mm in width. The NVIDIA H20 is an SXM Module with no listed dimensions. The AMD GPU's form factor suits embedded and handheld designs, while the H20 targets server chassis integration.

Head-to-Head Benchmarks

The recorded data shows no direct head-to-head benchmark results between the AMD Steam Deck OLED GPU and the NVIDIA H20, and neither GPU has individual benchmark scores in the database. Both GPUs sit at the 50th percentile when compared against all GPUs in the database, and both have an average benchmark score of 0. This lack of recorded benchmarks means the quantitative comparison must rely on the specification-level differences that are documented.

The FP32 compute gap is the most striking differentiator. The NVIDIA H20 delivers 39.54 TFLOPS, which is roughly 24 times the AMD Steam Deck OLED GPU's 1.638 TFLOPS. For FP16 workloads, the H20 provides 79.07 TFLOPS (2:1), while the AMD part delivers 3.277 TFLOPS (2:1), again a roughly 24-fold difference.

Texture processing shows a similar pattern. The NVIDIA H20 achieves a texture rate of 617.8 GTexel/s, compared to the AMD GPU's 51.20 GTexel/s. This represents approximately 12 times higher texture throughput. Pixel rates differ less dramatically: the H20 produces 47.52 GPixel/s versus 25.60 GPixel/s for the AMD part, a gap of roughly 1.9 times.

Memory bandwidth is where the NVIDIA H20 demonstrates its largest advantage. The H20's 4.03 TB/s bandwidth is approximately 23 times the AMD GPU's 176.0 GB/s. This bandwidth advantage is critical for server workloads that move large datasets, whereas the AMD GPU's memory subsystem is sized for handheld gaming scenarios.

The NVIDIA H20 also holds advantages in raw resource counts. It has 9,984 shading units versus 512 for the AMD part, 312 texture mapping units versus 32, and 312 tensor cores versus none listed for the AMD GPU. However, the AMD Steam Deck OLED GPU includes 8 ray tracing cores, which the H20 does not list.

Specification Differences

The two GPUs differ across nearly every measurable specification field.

Process and Die: AMD uses 6 nm with 2,400 million transistors on a 131 mm² die. NVIDIA uses 5 nm with 80,000 million transistors on an 814 mm² die. Transistor density is 18.3M per mm² for AMD and 98.3M per mm² for NVIDIA.

Clocks: AMD base clock is 1000 MHz and boost is 1600 MHz. NVIDIA base clock is 1830 MHz and boost is 1980 MHz. AMD memory clock is 1375 MHz (11 Gbps effective), NVIDIA memory clock is 1313 MHz (5.3 Gbps effective).

Memory: AMD has 16 GB LPDDR5 with 128-bit bus and 176.0 GB/s bandwidth. NVIDIA has 96 GB HBM3 with 6144-bit bus and 4.03 TB/s bandwidth.

Compute Units: AMD has 512 shading units, 32 TMUs, 16 ROPs, and 8 RT cores. NVIDIA has 9,984 shading units, 312 TMUs, 24 ROPs, and 312 tensor cores.

Rates: AMD pixel rate is 25.60 GPixel/s and texture rate is 51.20 GTexel/s. NVIDIA pixel rate is 47.52 GPixel/s and texture rate is 617.8 GTexel/s.

FP32 and FP16: AMD FP32 is 1.638 TFLOPS and FP16 is 3.277 TFLOPS (2:1). NVIDIA FP32 is 39.54 TFLOPS and FP16 is 79.07 TFLOPS (2:1).

Power: AMD TDP is 15 W. NVIDIA TDP is 500 W with a suggested PSU of 900 W.

Form Factor and Interface: AMD has dimensions of 298 mm x 117 mm x 49 mm and a USB Type-C display output. NVIDIA is an SXM Module with no dimensions, no display outputs, and a PCIe 5.0 x16 bus interface.

API Support: AMD supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3. NVIDIA lists N/A for all three APIs.

Release and Status: AMD released 2023-11-08 and NVIDIA released 2024-01-31. Both are Active. NVIDIA lists its predecessor as Server Ada and successor as Server Blackwell, while AMD lists no predecessor or successor.

The Verdict

The data shows two GPUs that occupy completely separate performance tiers and use cases. The NVIDIA H20 is the dominant compute part by every raw performance metric recorded. It delivers roughly 24 times the FP32 throughput, 24 times the FP16 throughput, 23 times the memory bandwidth, 12 times the texture rate, and nearly 2 times the pixel rate of the AMD Steam Deck OLED GPU. It also carries 6 times the memory capacity and over 19 times the shading units.

The AMD Steam Deck OLED GPU holds advantages in areas relevant to its intended form factor. Its 15 W TDP is 33 times lower than the H20's 500 W TDP, making it viable for handheld and portable devices. It includes ray tracing cores, which the H20 does not list. It supports standard graphics APIs including DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.3, while the H20 lists no graphics API support. It also provides a display output, which the H20 lacks entirely.

The H20's 900 W suggested PSU and SXM Module form factor indicate a datacenter installation context, not a consumer graphics context. Its lack of display outputs and graphics API support confirms this classification. The AMD GPU, by contrast, is a complete graphics solution with integrated display output and full API compatibility.

Neither GPU has recorded benchmark scores, and both sit at the 50th percentile in the database's overall GPU rankings. The absence of benchmark data means the verdict rests entirely on the specification comparison. Based on that comparison, the NVIDIA H20 is the clear choice for compute-heavy server workloads where power consumption and physical size are not constraints. The AMD Steam Deck OLED GPU is the appropriate choice for portable gaming devices where power efficiency, graphics API support, and display output are required.

Where Each One Wins

NVIDIA H20 wins in compute density and throughput. The H20's 39.54 TFLOPS FP32 and 79.07 TFLOPS FP16 performance are roughly 24 times the AMD part's figures. Its 4.03 TB/s memory bandwidth supports large-scale data movement that the AMD GPU's 176.0 GB/s cannot approach. The 96 GB HBM3 capacity is 6 times the AMD GPU's 16 GB, enabling larger working sets.

NVIDIA H20 wins in texture and pixel processing. The H20's 617.8 GTexel/s texture rate is approximately 12 times the AMD GPU's 51.20 GTexel/s. Its 47.52 GPixel/s pixel rate is nearly double the AMD part's 25.60 GPixel/s. The H20 also supports PCIe 5.0 x16, providing a modern high-bandwidth host interface that the AMD GPU does not list.

AMD Steam Deck OLED GPU wins in power efficiency. The AMD part's 15 W TDP is 33 times lower than the H20's 500 W TDP. This efficiency enables operation in handheld and embedded form factors where the H20's power requirements are impossible to meet.

AMD Steam Deck OLED GPU wins in graphics feature support. The AMD GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3. The H20 lists N/A for all three. The AMD part includes 8 ray tracing cores, while the H20 lists none. The AMD GPU's USB Type-C display output makes it a complete graphics solution, whereas the H20 has no outputs.

AMD Steam Deck OLED GPU wins in physical integration. The AMD GPU's dimensions of 298 mm x 117 mm x 49 mm fit into portable device chassis. The H20's SXM Module form factor requires server infrastructure. The AMD GPU's release date of 2023-11-08 predates the H20's 2024-01-31 release, giving it earlier market availability.

NVIDIA H20 wins in tensor processing. The H20's 312 tensor cores provide dedicated acceleration for tensor workloads, a capability the AMD GPU does not list. This makes the H20 suitable for machine learning inference and training tasks that require tensor operations.