AMD Steam Machine GPU vs NVIDIA L4 Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the AMD Steam Machine GPU and the NVIDIA L4. However, the available benchmark data for the NVIDIA L4 provides a reference point. The NVIDIA L4 records an average benchmark score of 131,072 across two tests: 140,838 in Geekbench OpenCL and 121,306 in Geekbench Vulkan. This places the L4 in the 95th percentile among all GPUs in the database. Its nearest rivals include the NVIDIA GeForce RTX 3090 Ti, which scores 131,938, a difference of -0.7 percent, and the NVIDIA RTX 4000 Ada Generation, which scores 135,218, a difference of -3.1 percent. The AMD Radeon PRO W6800 also sits close, at 135,396, with a -3.2 percent delta relative to the L4.

The AMD Steam Machine GPU has no recorded benchmark scores in the database, and its average benchmark score is zero. Its percentile ranking is 50, which indicates a mid-pack position among all GPUs, but without measured scores, direct numeric comparisons to the L4 are not possible from the recorded data. The L4, by contrast, demonstrates strong compute performance, with its OpenCL score exceeding its Vulkan score by 19,532 points, suggesting that its architecture is well-suited to general-purpose compute workloads. The lack of any head-to-head benchmark entries means that the only quantitative comparison available is through the L4's absolute scores and its position relative to other server and workstation GPUs in the database.

FAQ

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

A: The AMD Steam Machine GPU uses 8 GB of GDDR6 memory on a 128-bit bus, providing 288.0 GB/s of bandwidth. The NVIDIA L4 uses 24 GB of GDDR6 memory on a 192-bit bus, providing 300.1 GB/s of bandwidth. The L4 holds a significant advantage in capacity, with three times the memory, while bandwidth is nearly equivalent, with the L4 ahead by 12.1 GB/s.

Q: Which GPU has a higher transistor count and what does that indicate?

A: The NVIDIA L4 contains 35,800 million transistors on a 294 mm² die, while the AMD Steam Machine GPU contains 13,300 million transistors on a 204 mm² die. The L4 has roughly 2.7 times the transistor count and a higher transistor density of 121.8M per mm² compared to 65.2M per mm² for the AMD part. This reflects the L4's larger compute resources, including 7,424 shading units versus 1,792 for the Steam Machine GPU.

Q: How do the power requirements differ between the two cards?

A: The AMD Steam Machine GPU has a TDP of 110 W and requires no power connectors. The NVIDIA L4 has a TDP of 72 W, also requires no power connectors, but lists a suggested PSU of 250 W. Despite the L4 having a lower TDP, it carries a suggested PSU rating, whereas the Steam Machine GPU's database entry does not specify one.

Q: What are the physical dimensions of each GPU?

A: The AMD Steam Machine GPU measures 156 mm in length, 152 mm in height, and 162 mm in width. The NVIDIA L4 measures 169 mm in length and 56 mm in height, with no width listed. The L4 is a single-slot card, while the Steam Machine GPU's slot width is not specified in the database.

Q: Does either GPU support display outputs?

A: The AMD Steam Machine GPU includes 1x HDMI 2.1a and 1x DisplayPort 2.1 outputs. The NVIDIA L4 has no display outputs, as it is designed for server use. This makes the Steam Machine GPU suitable for direct display connection, while the L4 relies on other means for video output.

Q: What is the release timeframe for each product?

A: The AMD Steam Machine GPU has a release date of June 28, 2026, while the NVIDIA L4 was released on March 20, 2023. Both are marked as Active in production status. The L4's predecessor is Server Ampere, and its successor is Server Hopper, whereas the Steam Machine GPU has no listed predecessor or successor.

Architecture Differences

The two GPUs are built on fundamentally different architectures. The AMD Steam Machine GPU uses the RDNA 3.0 architecture, with the Navi 33 chip and the codename Hotpink Bonefish. It is classified as a Console GPU for Valve. The NVIDIA L4 uses the Ada Lovelace architecture, with the AD104 chip, and is classified as a Server Ada GPU. The process nodes differ: the Steam Machine GPU is fabricated on a 6 nm process at TSMC, while the L4 uses a 5 nm process, also at TSMC.

The compute resources are heavily skewed toward the L4. The L4 has 7,424 shading units, 240 texture mapping units, 80 ROPs, 60 RT cores, and 240 tensor cores. The Steam Machine GPU has 1,792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores, with no tensor cores listed. This means the L4 has approximately 4.1 times the shading units, 2.1 times the TMUs, and 2.1 times the RT cores. The L4's tensor cores are a notable addition, enabling AI and machine learning workloads that the Steam Machine GPU cannot accelerate through dedicated hardware.

Clock behavior also differs. The AMD part has a base clock of 1720 MHz, a game clock of 2250 MHz, and a boost clock of 2450 MHz. The L4 has a much lower base clock of 795 MHz but a boost clock of 2040 MHz. Memory clocks differ as well: the Steam Machine GPU runs its memory at 2250 MHz (18 Gbps effective), while the L4 runs at 1563 MHz (12.5 Gbps effective). Despite the lower memory clock, the L4 achieves higher bandwidth due to its wider 192-bit bus.

The L4's architecture is designed for compute density and low power. Its TDP of 72 W is lower than the Steam Machine GPU's 110 W, yet it delivers substantially higher raw throughput. The L4's FP32 performance is 30.29 TFLOPS, compared to 17.56 TFLOPS for the Steam Machine GPU. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical.

Specification Differences

The specification sheets reveal several clear divergences. Memory size differs: 8 GB on the Steam Machine GPU versus 24 GB on the L4. Bus width is 128-bit versus 192-bit. Bandwidth is 288.0 GB/s versus 300.1 GB/s. Shading units, TMUs, and ROPs all favor the L4, with 7,424 versus 1,792, 240 versus 112, and 80 versus 64, respectively. RT cores are 60 versus 28. Tensor cores are present only on the L4, at 240.

Pixel rate and texture rate follow the same pattern. The L4 achieves 163.2 GPixel/s and 489.6 GTexel/s. The Steam Machine GPU achieves 156.8 GPixel/s and 274.4 GTexel/s. FP32 and FP16 performance are both 30.29 TFLOPS on the L4, while the Steam Machine GPU delivers 17.56 TFLOPS for both. TDP is 72 W for the L4 and 110 W for the Steam Machine GPU. The L4 lists a suggested PSU of 250 W; the Steam Machine GPU has none.

Physical and interface specifications differ as well. The L4 is single-slot, 169 mm long and 56 mm high, with a PCIe 4.0 x16 bus interface. The Steam Machine GPU has dimensions of 156 mm by 152 mm by 162 mm, with no slot width or bus interface listed. The L4 has no display outputs; the Steam Machine GPU has one HDMI 2.1a and one DisplayPort 2.1. The L4 has a predecessor (Server Ampere) and a successor (Server Hopper); the Steam Machine GPU has neither. The L4's release date is March 20, 2023; the Steam Machine GPU's is June 28, 2026.

Where Each One Wins

The NVIDIA L4 wins decisively in compute-heavy workloads. Its FP32 throughput of 30.29 TFLOPS is 72 percent higher than the Steam Machine GPU's 17.56 TFLOPS. The L4 also has 240 tensor cores, which the Steam Machine GPU lacks entirely, making the L4 the only option for accelerated AI inference or training within this comparison. The L4's 24 GB memory capacity is triple that of the Steam Machine GPU, which is a critical advantage for large datasets, deep learning models, or in-memory processing. The L4's texture rate of 489.6 GTexel/s is 78 percent higher, and its ROP count of 80 versus 64 gives it an edge in fill-rate-bound tasks.

The L4 also wins on efficiency relative to its compute output. It delivers 30.29 TFLOPS at a TDP of 72 W, whereas the Steam Machine GPU delivers 17.56 TFLOPS at 110 W. The L4's performance per watt is superior, and its single-slot form factor with a 169 mm length makes it easier to integrate into dense server chassis. The L4's percentile ranking of 95 versus 50 for the Steam Machine GPU reinforces its position as a high-tier part in the database.

The AMD Steam Machine GPU wins in areas tied to its intended use as a console GPU. It has display outputs, with one HDMI 2.1a and one DisplayPort 2.1, enabling direct connection to displays, while the L4 has none. The Steam Machine GPU also has a higher boost clock of 2450 MHz versus 2040 MHz, which can benefit latency-sensitive or lightly threaded tasks. Its base clock of 1720 MHz is more than double the L4's 795 MHz, suggesting a design tuned for consistent sustained performance rather than burst compute. The Steam Machine GPU's dimensions, while larger in height and width, are still compact at 156 mm in length.

For gaming-specific workloads, the Steam Machine GPU's 28 RT cores and 64 ROPs, combined with its high clocks and 288.0 GB/s bandwidth, provide a reasonable baseline for real-time graphics. However, the L4's higher pixel rate of 163.2 GPixel/s versus 156.8 GPixel/s means even in pure rasterization terms, the L4 holds a slight edge. The Steam Machine GPU's advantage is therefore not in raw throughput but in its feature set for interactive use: display connectivity, a higher boost clock, and a form factor suited to a console enclosure. Its lack of tensor cores and lower memory capacity make it unsuitable for the server and AI workloads where the L4 is designed to operate.