AMD Steam Machine GPU vs NVIDIA H20 Comparison

Head-to-Head Benchmarks

The recorded database contains no direct head-to-head benchmark entries for the AMD Steam Machine GPU and the NVIDIA H20. Both parts hold a 50th percentile placement versus all GPUs in the database, and neither has an average benchmark score recorded. The absence of measured results means the comparison must rely entirely on the architectural and specification data captured for each product.

The AMD Steam Machine GPU delivers 17.56 TFLOPS of FP32 compute, while the NVIDIA H20 reaches 39.54 TFLOPS. That places the H20 roughly 2.25 times ahead of the AMD part in single-precision floating-point throughput. In FP16, the gap widens further: the NVIDIA H20 produces 79.07 TFLOPS with a 2:1 ratio, whereas the Steam Machine GPU provides 17.56 TFLOPS at a 1:1 ratio. The H20 therefore exceeds the AMD part by a factor of 4.5 in FP16 work.

Texture throughput also favors the NVIDIA H20. The H20 achieves 617.8 GTexel/s, while the Steam Machine GPU reaches 274.4 GTexel/s. The H20 is roughly 2.25 times faster in texture fill rate. Pixel rate tells the opposite story. The Steam Machine GPU outputs 156.8 GPixel/s, while the H20 manages 47.52 GPixel/s. The AMD part is about 3.3 times faster in pixel throughput, a direct result of its 64 ROPs versus the H20's 24 ROPs.

Memory bandwidth is heavily skewed toward the NVIDIA H20. The H20 provides 4.03 TB/s of bandwidth over a 6144-bit HBM3 interface, while the Steam Machine GPU offers 288.0 GB/s over a 128-bit GDDR6 bus. The H20's bandwidth advantage is approximately 14 times. Memory capacity follows the same pattern: 96 GB on the H20 against 8 GB on the AMD part.

Clock behavior differs in an interesting way. The Steam Machine GPU boosts to 2450 MHz with a base clock of 1720 MHz and a game clock of 2250 MHz. The NVIDIA H20 runs lower, with a base of 1830 MHz and a boost of 1980 MHz. The AMD part holds a higher boost clock by 470 MHz, yet the H20 compensates with a much larger shader array.

Power draw is not listed as a benchmark result, but the recorded TDP figures place the Steam Machine GPU at 110 W and the H20 at 500 W. The AMD part uses roughly one-fifth of the power budget of the NVIDIA accelerator.

Architecture Differences

The two chips share a foundry but little else. Both are manufactured by TSMC, with the AMD Steam Machine GPU on a 6 nm process and the NVIDIA H20 on a 5 nm process. Transistor counts differ enormously: the AMD chip contains 13,300 million transistors on a 204 mm² die, while the NVIDIA H20 packs 80,000 million transistors onto an 814 mm² die. Transistor density favors the NVIDIA part at 98.3M per mm² versus 65.2M per mm² for the AMD chip.

The AMD Steam Machine GPU uses the RDNA 3.0 architecture under the codename Hotpink Bonefish, and it belongs to the Console GPU (Valve) generation. The NVIDIA H20 uses the Hopper architecture on the GH100 chip and sits in the Server Hopper (Hxx) generation. These are fundamentally different design philosophies: one aimed at console-class rendering, the other at server compute.

Shader resources show the scale of the H20. The NVIDIA part has 9984 shading units, 312 TMUs, and 312 tensor cores. The AMD part has 1792 shading units, 112 TMUs, and 28 ray tracing cores. The H20 has no recorded ray tracing core count, while the Steam Machine GPU has no recorded tensor core count. Each design targets different acceleration paths.

Memory architecture is a major split. The Steam Machine GPU uses 8 GB of GDDR6 on a 128-bit bus. The H20 uses 96 GB of HBM3 on a 6144-bit bus. The bandwidth difference follows directly from the bus width and memory type.

Feature support diverges sharply. The AMD Steam Machine GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA H20 records N/A for DirectX, OpenGL, and Vulkan. The H20 has no display outputs, while the Steam Machine GPU provides 1x HDMI 2.1a and 1x DisplayPort 2.1. The H20 is a compute accelerator without a graphics output path.

Physical and electrical characteristics also differ. The Steam Machine GPU draws power through no external power connectors and measures 156 mm by 152 mm by 162 mm. The H20 is an SXM Module with a suggested PSU of 900 W and a PCIe 5.0 x16 bus interface. The H20 has no recorded dimensions.

Release timing places the H20 earlier. The NVIDIA H20 launched on 2024-01-31, while the AMD Steam Machine GPU launched on 2026-06-28. The H20 lists Server Ada as its predecessor and Server Blackwell as its successor. The AMD part has no predecessor or successor recorded.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA H20 delivers 39.54 TFLOPS of FP32, which is roughly 2.25 times the 17.56 TFLOPS produced by the AMD Steam Machine GPU.

Q: How do the memory systems compare?

A: The NVIDIA H20 uses 96 GB of HBM3 on a 6144-bit bus with 4.03 TB/s bandwidth. The AMD Steam Machine GPU uses 8 GB of GDDR6 on a 128-bit bus with 288.0 GB/s bandwidth. The H20 has about 14 times the bandwidth and 12 times the capacity.

Q: Does the NVIDIA H20 support graphics APIs?

A: No. The NVIDIA H20 records N/A for DirectX, OpenGL, and Vulkan, and it has no display outputs. The AMD Steam Machine GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and it includes HDMI 2.1a and DisplayPort 2.1 outputs.

Q: Which chip has the higher pixel fill rate?

A: The AMD Steam Machine GPU achieves 156.8 GPixel/s, which is about 3.3 times the 47.52 GPixel/s of the NVIDIA H20. This reflects the AMD part's 64 ROPs versus the H20's 24 ROPs.

Q: What is the transistor count difference?

A: The NVIDIA H20 contains 80,000 million transistors on an 814 mm² die. The AMD Steam Machine GPU contains 13,300 million transistors on a 204 mm² die. The H20 has roughly six times the transistor count.

Q: Which GPU runs at higher boost clocks?

A: The AMD Steam Machine GPU boosts to 2450 MHz, which is 470 MHz higher than the NVIDIA H20's 1980 MHz boost clock. The AMD part also has a higher base clock at 1720 MHz versus 1830 MHz for the H20, meaning the H20 has the higher base clock by 110 MHz.

Specification Differences

The two products differ in nearly every recorded specification field.

• Architecture: RDNA 3.0 (AMD) versus Hopper (NVIDIA)
• Codename: Hotpink Bonefish (AMD) versus none recorded (NVIDIA)
• Generation: Console GPU (Valve) versus Server Hopper (Hxx)
• Process node: 6 nm (AMD) versus 5 nm (NVIDIA)
• Transistors: 13,300 million versus 80,000 million
• Die size: 204 mm² versus 814 mm²
• Transistor density: 65.2M / mm² versus 98.3M / mm²
• Base clock: 1720 MHz versus 1830 MHz
• Boost clock: 2450 MHz versus 1980 MHz
• Game clock: 2250 MHz (AMD) versus none recorded (NVIDIA)
• Memory clock: 2250 MHz 18 Gbps effective versus 1313 MHz 5.3 Gbps effective
• Memory size: 8 GB versus 96 GB
• Memory type: GDDR6 versus HBM3
• Memory bus width: 128 bit versus 6144 bit
• Memory bandwidth: 288.0 GB/s versus 4.03 TB/s
• Shading units: 1792 versus 9984
• TMUs: 112 versus 312
• ROPs: 64 versus 24
• RT cores: 28 versus none recorded
• Tensor cores: none recorded versus 312
• Pixel rate: 156.8 GPixel/s versus 47.52 GPixel/s
• Texture rate: 274.4 GTexel/s versus 617.8 GTexel/s
• FP32: 17.56 TFLOPS versus 39.54 TFLOPS
• FP16: 17.56 TFLOPS (1:1) versus 79.07 TFLOPS (2:1)
• TDP: 110 W versus 500 W
• Slot width: none recorded versus SXM Module
• Power connectors: None versus none recorded
• Suggested PSU: none recorded versus 900 W
• Bus interface: none recorded versus PCIe 5.0 x16
• Display outputs: 1x HDMI 2.1a, 1x DisplayPort 2.1 versus no outputs
• DirectX: 12 Ultimate (12_2) versus N/A
• OpenGL: 4.6 versus N/A
• Vulkan: 1.4 versus N/A
• Dimensions: 156 mm by 152 mm by 162 mm versus none recorded
• Release date: 2026-06-28 versus 2024-01-31
• Predecessor: none versus Server Ada
• Successor: none versus Server Blackwell

Where Each One Wins

The AMD Steam Machine GPU wins in pixel throughput. Its 156.8 GPixel/s, driven by 64 ROPs, outpaces the NVIDIA H20's 47.52 GPixel/s by a factor of 3.3. This makes the AMD part the stronger choice for rasterization-heavy workloads that depend on fill rate.

The AMD part also leads in clock speed. A boost clock of 2450 MHz and a game clock of 2250 MHz give it a responsiveness advantage in latency-sensitive rendering tasks. Its graphics output support, with HDMI 2.1a and DisplayPort 2.1, means it can drive displays directly, a capability the H20 lacks entirely.

Power efficiency belongs to the AMD part. With a TDP of 110 W against the H20's 500 W, the Steam Machine GPU operates at a fraction of the power envelope. For constrained environments where thermal and electrical budgets are tight, the AMD part holds a clear advantage.

The NVIDIA H20 wins decisively in compute throughput. Its 39.54 TFLOPS of FP32 and 79.07 TFLOPS of FP16 dwarf the AMD part's 17.56 TFLOPS in both precisions. The presence of 312 tensor cores and the 2:1 FP16 ratio indicate a design oriented toward accelerated compute, not conventional graphics.

Memory capacity and bandwidth are entirely on the H20's side. The 96 GB HBM3 pool with 4.03 TB/s bandwidth supports large model footprints and high-bandwidth data movement. The Steam Machine GPU's 8 GB GDDR6 at 288.0 GB/s cannot approach that class of memory-intensive work.

The H20 also wins on interconnect and integration. Its PCIe 5.0 x16 bus interface and SXM Module form factor align with server infrastructure. The suggested PSU of 900 W reflects a system-level design built around sustained compute loads.

The two products occupy separate roles. The Steam Machine GPU is a console-class graphics processor with display outputs, graphics API support, and a compact 156 mm by 152 mm by 162 mm footprint. The H20 is a server accelerator with no display path, no graphics API support, and a form factor designed for dense data center deployment. The recorded data shows complementary strengths: the AMD part for rendering and power-limited graphics, the NVIDIA part for massive compute and memory throughput.