AMD Steam Machine GPU vs NVIDIA RTX PRO 4000 Blackwell Comparison

AMD Steam Machine GPU vs NVIDIA RTX PRO 4000 Blackwell

The AMD Steam Machine GPU and the NVIDIA RTX PRO 4000 Blackwell represent two very different approaches to graphics hardware, one designed for a specific console-like form factor and the other for professional workstation workloads. The database shows a clear performance hierarchy, with the RTX PRO 4000 Blackwell delivering substantially higher raw compute and memory throughput, while the AMD part offers a compact, low-power design with modern feature support. The recorded data indicates that the RTX PRO 4000 Blackwell sits in the 72nd percentile of all GPUs, while the AMD Steam Machine GPU is at the 50th percentile, a significant gap that reflects their different target markets and silicon budgets.

FAQ

Q: What is the memory capacity difference between the two GPUs?

A: The AMD Steam Machine GPU has 8 GB of GDDR6 memory on a 128-bit bus, while the NVIDIA RTX PRO 4000 Blackwell has 24 GB of GDDR7 memory on a 192-bit bus. This gives the NVIDIA part a 672.0 GB/s memory bandwidth versus 288.0 GB/s for the AMD part.

Q: How do their power requirements compare?

A: The AMD Steam Machine GPU has a TDP of 110 W and requires no power connectors, drawing power entirely from its slot. The NVIDIA RTX PRO 4000 Blackwell has a TDP of 140 W and requires a single 16-pin power connector, with a suggested PSU of 300 W.

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

A: The NVIDIA RTX PRO 4000 Blackwell delivers 36.83 TFLOPS of FP32 performance, which is more than double the 17.56 TFLOPS delivered by the AMD Steam Machine GPU. Both parts achieve a 1:1 ratio for FP16 and FP32 performance.

Q: What are the physical dimensions of each card?

A: The AMD Steam Machine GPU measures 156 mm in length, 152 mm in height, and 162 mm in width. The NVIDIA RTX PRO 4000 Blackwell is longer at 241 mm but much thinner, measuring 111 mm in height and only 20 mm in width, and it occupies a single slot.

Q: Which GPU has more ray tracing cores?

A: The NVIDIA RTX PRO 4000 Blackwell has 70 RT cores, while the AMD Steam Machine GPU has 28 RT cores. The NVIDIA part also includes 280 tensor cores, which the AMD part lacks entirely.

Q: What is the release timing for these products?

A: The NVIDIA RTX PRO 4000 Blackwell was released on March 17, 2025, while the AMD Steam Machine GPU has a later release date of June 28, 2026, and is listed as part of the Console GPU (Valve) generation.

Architecture Differences

The architectural divide between these two GPUs is substantial. The AMD Steam Machine GPU uses the Navi 33 chip built on RDNA 3.0 architecture, codenamed Hotpink Bonefish, and is manufactured on a 6 nm process at TSMC with 13,300 million transistors on a 204 mm² die. The NVIDIA RTX PRO 4000 Blackwell uses the GB203 chip on Blackwell 2.0 architecture, built on a 5 nm process at TSMC with 45,600 million transistors on a 378 mm² die. The transistor density figures confirm this gap: the NVIDIA part packs 120.6 million transistors per square millimeter, while the AMD part achieves 65.2 million per square millimeter.

The execution resources differ dramatically. The RTX PRO 4000 Blackwell has 8,960 shading units, 280 texture mapping units, and 96 render output units. The AMD Steam Machine GPU has 1,792 shading units, 112 TMUs, and 64 ROPs. In terms of specialized hardware, the NVIDIA card carries 70 RT cores and 280 tensor cores, while the AMD card has 28 RT cores and no tensor core support. This means the NVIDIA part is equipped for AI-accelerated workloads and advanced ray tracing, while the AMD part relies on its general-purpose shader array for those tasks.

The memory subsystems reflect their different roles. The AMD GPU uses 8 GB of GDDR6 with a 128-bit bus and 288.0 GB/s bandwidth, while the NVIDIA GPU uses 24 GB of GDDR7 with a 192-bit bus and 672.0 GB/s bandwidth. Clock behavior also differs: the AMD card has a base clock of 1720 MHz, a game clock of 2250 MHz, and a boost clock of 2450 MHz, while the NVIDIA card has a lower base clock of 1230 MHz and a boost clock of 2055 MHz. The higher clock speeds on the AMD part help it compensate partially for its smaller shader count, but cannot overcome the NVIDIA card's massive resource advantage.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API-level feature parity exists. Display outputs differ, with the AMD card offering one HDMI 2.1a and one DisplayPort 2.1, while the NVIDIA card offers four DisplayPort 2.1b outputs. The NVIDIA card uses a PCIe 5.0 x16 bus interface, while the AMD card has no bus interface listed in the database. The physical design also diverges sharply, with the AMD part being a compact square-like module and the NVIDIA part being a traditional single-slot card with a 16-pin power connector.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between these two specific GPUs, and the AMD Steam Machine GPU has no individual benchmark scores recorded. However, the NVIDIA RTX PRO 4000 Blackwell has a full set of benchmark results that place it clearly in the performance hierarchy. Its average benchmark score is 27,135, and it sits at the 72nd percentile of all GPUs. Its nearest rivals provide context: it scores 1.1% below the AMD Radeon RX 6700 XT, 1.1% below the NVIDIA GeForce RTX 4070 Mobile, 1.6% below the NVIDIA GeForce RTX 3090, and 1.7% above the NVIDIA RTX A4000.

The RTX PRO 4000 Blackwell's individual benchmark results show its strengths. In the 3DMark Steel Nomad DX12 test, it scores 4,648. In Geekbench Vulkan, it achieves 194,168. The PassMark suite shows a G3D score of 28,427 and a GPU compute score of 14,805. Its DirectX scores are 354 for DX9, 276 for DX11, 173 for DX10, and 97 for DX12, while its G2D score is 1,265. These figures indicate a card that excels in modern graphics workloads and compute tasks, with the Vulkan and 3DMark scores being particularly strong relative to its PassMark numbers.

Given that the AMD Steam Machine GPU has zero recorded benchmark scores and zero wins against the NVIDIA card in the head-to-head data, the comparison must rely on architectural and specification analysis. The FP32 throughput difference alone, 36.83 TFLOPS versus 17.56 TFLOPS, suggests the NVIDIA card should deliver roughly double the shader-bound performance. The texture rate of 575.4 GTexel/s on the NVIDIA part versus 274.4 GTexel/s on the AMD part reinforces this, as does the pixel rate of 197.3 GPixel/s versus 156.8 GPixel/s. Memory bandwidth is even more lopsided, with the NVIDIA card offering 672.0 GB/s against 288.0 GB/s, a difference that becomes critical in high-resolution textures and large data sets.

Specification Differences

The two GPUs differ across nearly every measurable specification. The process node is 6 nm for the AMD part and 5 nm for the NVIDIA part, both from TSMC. Transistor count is 13,300 million for AMD and 45,600 million for NVIDIA, with die sizes of 204 mm² and 378 mm² respectively. The AMD card has 1,792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores, while the NVIDIA card has 8,960 shading units, 280 TMUs, 96 ROPs, 70 RT cores, and 280 tensor cores. The AMD part has no tensor cores at all.

Memory configuration is a major differentiator. The AMD card has 8 GB of GDDR6 on a 128-bit bus, while the NVIDIA card has 24 GB of GDDR7 on a 192-bit bus. Bandwidth is 288.0 GB/s versus 672.0 GB/s. Clock speeds favor AMD in raw frequency: base 1720 MHz versus 1230 MHz, boost 2450 MHz versus 2055 MHz, and a game clock of 2250 MHz that the NVIDIA card does not list. Memory clocks are 2250 MHz with 18 Gbps effective for AMD and 1750 MHz with 28 Gbps effective for NVIDIA, the higher effective speed on the NVIDIA part stemming from the GDDR7 standard.

Power and physical specifications also diverge. The AMD card has a 110 W TDP and no power connectors, while the NVIDIA card has a 140 W TDP and requires one 16-pin connector with a suggested PSU of 300 W. The AMD card is 156 mm long, 152 mm tall, and 162 mm wide, while the NVIDIA card is 241 mm long, 111 mm tall, and 20 mm wide, and is explicitly listed as single-slot. Display outputs are one HDMI 2.1a plus one DisplayPort 2.1 for AMD versus four DisplayPort 2.1b for NVIDIA. The NVIDIA card has a PCIe 5.0 x16 interface, the AMD card has none listed. The NVIDIA card's predecessor is listed as Workstation Ada, while the AMD card has no predecessor or successor. Both are marked as Active in production status.

The Verdict

The recorded data indicates that the NVIDIA RTX PRO 4000 Blackwell is the stronger GPU in almost every measurable category. It more than doubles the FP32 compute throughput, offers three times the memory capacity, provides over twice the memory bandwidth, and includes tensor cores that the AMD part lacks entirely. Its 72nd percentile ranking versus the AMD part's 50th percentile quantifies this gap. The NVIDIA card also has a longer release history, having launched in March 2025 compared to the AMD card's June 2026 date, and its predecessor, Workstation Ada, confirms its professional lineage.

The AMD Steam Machine GPU does hold advantages in certain areas. Its compact dimensions, lower TDP of 110 W, and lack of any power connector requirement make it easier to integrate into space-constrained designs. Its higher clock speeds, including a 2450 MHz boost and a 2250 MHz game clock, show that it is tuned for efficiency within its power envelope. The single HDMI 2.1a output and single DisplayPort 2.1 output suggest a focus on simple display configurations rather than multi-monitor professional setups.

For users who need maximum compute performance, large memory capacity for data-heavy workloads, and professional-grade features like tensor cores and multiple display outputs, the RTX PRO 4000 Blackwell is the clear choice from the data. For applications that prioritize small size, low power draw, and simple installation, the AMD Steam Machine GPU offers a viable alternative, though its performance ceiling is significantly lower. The benchmark results for the NVIDIA card show it performing competitively with cards like the RTX 3090 and RX 6700 XT, while the AMD card has no recorded scores to compare.

Where Each One Wins

The NVIDIA RTX PRO 4000 Blackwell wins in all compute-heavy scenarios based on the specification data. Its 36.83 TFLOPS of FP32 performance, 575.4 GTexel/s texture rate, and 197.3 GPixel/s pixel rate make it suited for rendering, simulation, and AI inference workloads where its 280 tensor cores can be utilized. The 24 GB of GDDR7 memory on a 192-bit bus with 672.0 GB/s bandwidth supports large models, high-resolution textures, and multi-application workflows. Its four DisplayPort 2.1b outputs enable multi-monitor professional configurations, and its single-slot design allows dense workstation builds.

The AMD Steam Machine GPU wins in scenarios where power efficiency and physical footprint take priority. Its 110 W TDP, compared to 140 W for the NVIDIA card, and its lack of power connectors make it simpler to deploy in compact systems. Its dimensions of 156 mm by 152 mm by 162 mm, while not small in every axis, allow for flexible mounting in custom enclosures. The higher clock speeds, with a 2450 MHz boost and 2250 MHz game clock, indicate that it can deliver competitive performance per watt for its class, and its 17.56 TFLOPS of FP32 performance is respectable for a 110 W part. The single HDMI 2.1a and single DisplayPort 2.1 outputs cover basic display needs, and its RDNA 3.0 architecture provides full DirectX 12 Ultimate support with 28 RT cores for entry-level ray tracing.

The data does not support the AMD part winning any performance benchmark against the NVIDIA card, given the NVIDIA card's 72nd percentile ranking and the AMD card's 50th percentile ranking. The nearest rival data for the NVIDIA card shows it trading blows with high-end cards like the RTX 3090 and RX 6700 XT, which puts it in a completely different performance class than the AMD Steam Machine GPU. The AMD card's role is best understood as a specialized console component for Valve's Steam Machine platform, optimized for its specific use case rather than for raw performance leadership.