AMD Steam Machine GPU vs NVIDIA H800 PCIe 80 GB Comparison

Head-to-Head Benchmarks

The recorded data shows no direct benchmark results for either the AMD Steam Machine GPU or the NVIDIA H800 PCIe 80 GB. Both entries carry an average benchmark score of zero and no entries in their head-to-head benchmark lists. The database also assigns both products a 50th percentile ranking among all GPUs, indicating that no performance differentiation can be derived from the available measurements.

The absence of benchmark data means that the AMD Steam Machine GPU and the NVIDIA H800 PCIe 80 GB cannot be compared on the basis of actual workload performance. The AMD part lists a floating-point throughput of 17.56 TFLOPS for FP32 and 17.56 TFLOPS for FP16 (1:1 ratio). The NVIDIA part lists FP32 at 51.22 TFLOPS and FP16 at 204.9 TFLOPS (4:1 ratio). These figures are theoretical peak rates from the specification sheets, not measured benchmark scores. The database does not yet contain any application-level results to confirm how these theoretical rates translate into real-world tasks.

The wins tally in the database shows zero wins for each side, reinforcing that no head-to-head testing has been completed. Without benchmark submissions, the relative performance between the two accelerators remains unquantified. The data confirms only that the NVIDIA H800 PCIe 80 GB carries a substantially higher FP32 peak and a vastly higher FP16 peak, but no measured score validates whether those peaks are sustained under load.

Architecture Differences

The AMD Steam Machine GPU uses the Navi 33 chip, built on the RDNA 3.0 architecture with the codename Hotpink Bonefish. It belongs to the Console GPU (Valve) generation. The NVIDIA H800 PCIe 80 GB uses the GH100 chip, built on the Hopper architecture, and belongs to the Server Hopper (Hxx) generation. The two designs target entirely different segments: one is a compact console-oriented GPU, the other is a server accelerator.

The manufacturing processes differ. AMD fabricated the Navi 33 on a 6 nm node at TSMC. NVIDIA fabricated the GH100 on a 5 nm node, also at TSMC. The transistor counts are dramatically different. The AMD chip contains 13,300 million transistors on a die size of 204 mm², giving a transistor density of 65.2 million per mm². The NVIDIA chip contains 80,000 million transistors on a die size of 814 mm², giving a transistor density of 98.3 million per mm². The NVIDIA die is roughly four times larger in area and holds roughly six times as many transistors.

The memory subsystems are fundamentally different. The AMD Steam Machine GPU uses 8 GB of GDDR6 memory on a 128-bit bus, producing 288.0 GB/s of bandwidth. The NVIDIA H800 PCIe 80 GB uses 80 GB of HBM2e memory on a 5120-bit bus, producing 2.04 TB/s of bandwidth. The NVIDIA part offers ten times the capacity and over seven times the bandwidth.

The compute resources show a large disparity. The AMD GPU has 1792 shading units, 112 texture mapping units, 64 render output units, and 28 ray tracing cores. It has no tensor cores listed. The NVIDIA GPU has 14,592 shading units, 456 texture mapping units, 24 render output units, and 456 tensor cores, with no ray tracing cores listed. The NVIDIA part has roughly eight times the shading units and four times the texture units.

Clock speeds also differ significantly. The AMD GPU runs at a base clock of 1720 MHz, a game clock of 2250 MHz, and a boost clock of 2450 MHz. Its memory runs at 2250 MHz with 18 Gbps effective data rate. The NVIDIA GPU runs at a base clock of 1095 MHz and a boost clock of 1755 MHz, with a memory clock of 1593 MHz and 3.2 Gbps effective data rate. The AMD part operates at higher clock frequencies, but the NVIDIA part compensates with far more compute units and a wider memory bus.

Pixel and texture rates reflect the architectural differences. The AMD GPU lists 156.8 GPixel/s and 274.4 GTexel/s. The NVIDIA GPU lists 42.12 GPixel/s and 800.3 GTexel/s. The AMD part has a higher pixel fill rate, while the NVIDIA part has a higher texture fill rate.

Power consumption differs by a wide margin. The AMD Steam Machine GPU has a TDP of 110 W and requires no power connectors. The NVIDIA H800 PCIe 80 GB has a TDP of 350 W and requires a single 16-pin power connector, with a suggested PSU of 750 W.

The physical designs are also distinct. The AMD GPU measures 156 mm in length, 152 mm in height, and 162 mm in width. The NVIDIA GPU measures 268 mm in length and 111 mm in height, with no width listed, and occupies a dual-slot footprint. The AMD GPU has no slot width listed.

Display outputs differ completely. The AMD Steam Machine GPU provides one HDMI 2.1a output and one DisplayPort 2.1 output. The NVIDIA H800 PCIe 80 GB provides no display outputs.

API support differs as well. The AMD GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA GPU lists no API support in the database.

The bus interface also separates the two. The NVIDIA H800 PCIe 80 GB uses PCIe 5.0 x16. The AMD Steam Machine GPU has no bus interface listed.

The Verdict

The data indicates that these two products serve entirely different purposes, and the selection depends strictly on the workload context. The AMD Steam Machine GPU is a low-power, console-oriented GPU with a 110 W TDP, no power connectors, and integrated display outputs. It is designed for a compact gaming device, as evidenced by its RDNA 3.0 architecture, ray tracing cores, and support for DirectX 12 Ultimate, OpenGL, and Vulkan.

The NVIDIA H800 PCIe 80 GB is a server accelerator with a 350 W TDP, a 16-pin power connector, a suggested 750 W PSU, and no display outputs. Its Hopper architecture, 80 GB of HBM2e memory, 2.04 TB/s bandwidth, and 456 tensor cores point toward data center compute workloads, particularly those involving tensor operations and large memory footprints.

The AMD GPU is the only one of the two with display outputs, making it suitable for a system that needs to drive a screen. The NVIDIA GPU has no display outputs, so it cannot function as a standalone graphics output device.

For tasks that require FP16 throughput, the NVIDIA H800 PCIe 80 GB lists 204.9 TFLOPS, which is over eleven times the AMD GPU's 17.56 TFLOPS. For FP32 workloads, the NVIDIA part lists 51.22 TFLOPS versus 17.56 TFLOPS, a factor of roughly three. For memory bandwidth, the NVIDIA part lists 2.04 TB/s versus 288.0 GB/s, a factor of roughly seven.

For a compact gaming console with a low power envelope and display connectivity, the AMD Steam Machine GPU is the only viable option in this comparison. For a server environment requiring massive memory capacity, tensor cores, and high bandwidth, the NVIDIA H800 PCIe 80 GB is the only viable option. Neither product can substitute for the other based on the recorded specifications.

The production status for both is listed as active. The release dates differ, with the NVIDIA H800 PCIe 80 GB released on March 20, 2023, and the AMD Steam Machine GPU released on June 28, 2026. The NVIDIA part has a listed predecessor (Server Ada) and successor (Server Blackwell), while the AMD part has no listed predecessor or successor.

Specification Differences

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

Process node: AMD uses 6 nm; NVIDIA uses 5 nm.

Transistors: AMD has 13,300 million; NVIDIA has 80,000 million.

Die size: AMD measures 204 mm²; NVIDIA measures 814 mm².

Transistor density: AMD has 65.2 million per mm²; NVIDIA has 98.3 million per mm².

Base clock: AMD runs at 1720 MHz; NVIDIA runs at 1095 MHz.

Boost clock: AMD runs at 2450 MHz; NVIDIA runs at 1755 MHz.

Game clock: AMD lists 2250 MHz; NVIDIA lists none.

Memory clock: AMD lists 2250 MHz with 18 Gbps effective; NVIDIA lists 1593 MHz with 3.2 Gbps effective.

Memory size: AMD has 8 GB; NVIDIA has 80 GB.

Memory type: AMD uses GDDR6; NVIDIA uses HBM2e.

Memory bus width: AMD has 128 bit; NVIDIA has 5120 bit.

Memory bandwidth: AMD has 288.0 GB/s; NVIDIA has 2.04 TB/s.

Shading units: AMD has 1792; NVIDIA has 14,592.

Texture mapping units: AMD has 112; NVIDIA has 456.

Render output units: AMD has 64; NVIDIA has 24.

Ray tracing cores: AMD has 28; NVIDIA has none listed.

Tensor cores: AMD has none listed; NVIDIA has 456.

Pixel rate: AMD has 156.8 GPixel/s; NVIDIA has 42.12 GPixel/s.

Texture rate: AMD has 274.4 GTexel/s; NVIDIA has 800.3 GTexel/s.

FP32 throughput: AMD has 17.56 TFLOPS; NVIDIA has 51.22 TFLOPS.

FP16 throughput: AMD has 17.56 TFLOPS (1:1); NVIDIA has 204.9 TFLOPS (4:1).

TDP: AMD has 110 W; NVIDIA has 350 W.

Slot width: AMD has none listed; NVIDIA is dual-slot.

Power connectors: AMD has none; NVIDIA has one 16-pin connector.

Suggested PSU: AMD has none listed; NVIDIA lists 750 W.

Bus interface: AMD has none listed; NVIDIA uses PCIe 5.0 x16.

Display outputs: AMD has one HDMI 2.1a and one DisplayPort 2.1; NVIDIA has no outputs.

DirectX support: AMD supports 12 Ultimate (12_2); NVIDIA lists none.

OpenGL support: AMD supports 4.6; NVIDIA lists none.

Vulkan support: AMD supports 1.4; NVIDIA lists none.

Dimensions: AMD measures 156 mm length, 152 mm height, 162 mm width; NVIDIA measures 268 mm length, 111 mm height, no width.

Release date: AMD released June 28, 2026; NVIDIA released March 20, 2023.

Predecessor: AMD has none; NVIDIA has Server Ada.

Successor: AMD has none; NVIDIA has Server Blackwell.

Codename: AMD has Hotpink Bonefish; NVIDIA has none listed.

Generation: AMD is Console GPU (Valve); NVIDIA is Server Hopper (Hxx).

FAQ

Q: Which GPU has more memory bandwidth?

A: The NVIDIA H800 PCIe 80 GB has 2.04 TB/s of memory bandwidth. The AMD Steam Machine GPU has 288.0 GB/s. The NVIDIA part offers over seven times the bandwidth.

Q: What is the difference in FP32 floating-point performance?

A: The NVIDIA H800 PCIe 80 GB lists 51.22 TFLOPS of FP32 throughput. The AMD Steam Machine GPU lists 17.56 TFLOPS. The NVIDIA part has roughly three times the FP32 peak.

Q: Does either GPU support display outputs?

A: The AMD Steam Machine GPU provides one HDMI 2.1a output and one DisplayPort 2.1 output. The NVIDIA H800 PCIe 80 GB provides no display outputs.

Q: Which GPU has tensor cores?

A: The NVIDIA H800 PCIe 80 GB has 456 tensor cores. The AMD Steam Machine GPU has no tensor cores listed in the database.

Q: What are the power requirements for each GPU?

A: The AMD Steam Machine GPU has a TDP of 110 W and requires no power connectors. The NVIDIA H800 PCIe 80 GB has a TDP of 350 W, requires one 16-pin power connector, and lists a suggested PSU of 750 W.

Q: Which GPU uses a larger memory bus?

A: The NVIDIA H800 PCIe 80 GB uses a 5120-bit bus. The AMD Steam Machine GPU uses a 128-bit bus. The NVIDIA part has a bus width that is forty times larger.