AMD Instinct MI350P vs AMD Steam Machine GPU Comparison

Where Each One Wins

The AMD Instinct MI350P and the AMD Steam Machine GPU occupy completely different corners of the AMD product stack, and the recorded data reflects that split clearly. The MI350P is an accelerator built around the CDNA 4.0 architecture, designed for compute workloads that demand massive memory capacity and bandwidth. The Steam Machine GPU is a compact RDNA 3.0 console part, configured for a Valve-based system with a focus on conventional graphics rendering and low power draw.

The MI350P wins outright on raw compute throughput, memory capacity, and memory bandwidth. Its FP32 performance is listed at 36.04 TFLOPS, exactly double the Steam Machine GPU's 17.56 TFLOPS. The FP16 figure is identical to the FP32 figure on both parts, with each listed as 1:1, so the MI350P also doubles the Steam Machine GPU on FP16 work. Texture rate follows the same pattern: 1,126.4 GTexel/s versus 274.4 GTexel/s, a 4.1x advantage for the MI350P.

The Steam Machine GPU wins on pixel throughput and display functionality. It has 64 ROPs and a pixel rate of 156.8 GPixel/s, while the MI350P has zero ROPs and a pixel rate of 0 MPixel/s. The Steam Machine GPU also has 28 ray tracing cores, while the MI350P lists no RT cores at all. Display outputs are present on the Steam Machine GPU (1x HDMI 2.1a and 1x DisplayPort 2.1), while the MI350P lists no outputs.

The use-case split is stark. For compute-heavy tasks such as large model inference or scientific simulation, the MI350P's 144 GB of HBM3e memory and 8.19 TB/s bandwidth are the dominant factors. For graphics rendering, rasterization, and ray tracing in a console context, the Steam Machine GPU is the only one of the two with the necessary ROPs, RT cores, and display interfaces.

FAQ

Q: Which GPU has more memory and bandwidth?

A: The AMD Instinct MI350P has 144 GB of HBM3e memory with an 8192-bit bus and 8.19 TB/s bandwidth. The AMD Steam Machine GPU has 8 GB of GDDR6 memory on a 128-bit bus with 288.0 GB/s bandwidth.

Q: How do the FP32 compute figures compare?

A: The MI350P delivers 36.04 TFLOPS of FP32, while the Steam Machine GPU delivers 17.56 TFLOPS. The MI350P is exactly double the Steam Machine GPU in FP32 throughput.

Q: Does either GPU support ray tracing?

A: The Steam Machine GPU includes 28 ray tracing cores. The MI350P does not list any RT cores.

Q: What are the process nodes and foundries for each?

A: The MI350P is built on a 3 nm process at TSMC, with 73,000 million transistors on a 1190 mm² die. The Steam Machine GPU uses a 6 nm process at TSMC, with 13,300 million transistors on a 204 mm² die.

Q: What is the power draw difference?

A: The MI350P has a TDP of 600 W with a single 16-pin power connector and a suggested PSU of 1000 W. The Steam Machine GPU has a TDP of 110 W and lists no power connectors.

Q: What API support does each GPU have?

A: The Steam Machine GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI350P lists N/A for DirectX, OpenGL, and Vulkan.

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark runs between these two parts, and neither GPU has an average benchmark score or a nearest-rivals list populated. What the data does provide are the raw specification-derived performance ceilings, and those ceilings differ by a wide margin.

The most significant single-number comparison is FP32 compute. The MI350P's 36.04 TFLOPS is double the Steam Machine GPU's 17.56 TFLOPS. This is not a marginal gap; it is a full 2x multiplier. For any workload that scales with shader throughput, the MI350P has a decisive theoretical advantage. The same doubling applies to FP16, since both parts list FP16 at 36.04 TFLOPS (1:1) and 17.56 TFLOPS (1:1) respectively.

Texture rate shows an even larger gap. The MI350P reaches 1,126.4 GTexel/s, which is 4.1 times the Steam Machine GPU's 274.4 GTexel/s. This follows from the MI350P having 512 TMUs versus 112 TMUs on the Steam Machine GPU. The clock speeds do not compensate: the MI350P boosts to 2200 MHz, while the Steam Machine GPU boosts to 2450 MHz. The higher clock on the smaller part narrows the per-TMU throughput gap but cannot overcome the 4.6x difference in TMU count.

Pixel rate flips the comparison entirely. The Steam Machine GPU outputs 156.8 GPixel/s from its 64 ROPs. The MI350P has no ROPs and a listed pixel rate of 0 MPixel/s. This is a categorical difference, not a quantitative one. The MI350P is not slower at rasterization; it is structurally incapable of it, which is consistent with its lack of display outputs and its N/A API status for DirectX, OpenGL, and Vulkan.

Memory bandwidth is the other major separator. The MI350P's 8.19 TB/s is 28.4 times the Steam Machine GPU's 288.0 GB/s. The MI350P uses an 8192-bit bus with HBM3e memory, while the Steam Machine GPU uses a 128-bit bus with GDDR6. The effective memory clock on the Steam Machine GPU is 18 Gbps, versus 8 Gbps on the MI350P, but the bus width difference dominates. This bandwidth advantage is what makes the MI350P suitable for memory-bound compute workloads, while the Steam Machine GPU's narrower bus is adequate for a console-class graphics part.

Shader count reinforces the compute divide. The MI350P has 8192 shading units, while the Steam Machine GPU has 1792. Even with the Steam Machine GPU's higher boost clock of 2450 MHz versus 2200 MHz, the MI350P's 4.6x shading unit count yields the 2x FP32 advantage observed in the TFLOPS figures.

Specification Differences

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

The MI350P uses the MI350 128CU chip, while the Steam Machine GPU uses the Navi 33 chip. The MI350P is built on a 3 nm process at TSMC, with 73,000 million transistors on a 1190 mm² die. The Steam Machine GPU uses a 6 nm process at TSMC, with 13,300 million transistors on a 204 mm² die. Transistor density is close: 61.3M per mm² for the MI350P, versus 65.2M per mm² for the Steam Machine GPU.

Clock speeds differ in both base and boost. The MI350P runs at 1000 MHz base and 2200 MHz boost. The Steam Machine GPU runs at 1720 MHz base and 2450 MHz boost, with a game clock of 2250 MHz. The Steam Machine GPU also lists a memory clock of 2250 MHz with 18 Gbps effective, while the MI350P lists 2000 MHz with 8 Gbps effective.

Memory configuration is fundamentally different. The MI350P has 144 GB of HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth. The Steam Machine GPU has 8 GB of GDDR6 on a 128-bit bus with 288.0 GB/s bandwidth.

Compute unit counts align with the chip names. The MI350P has 8192 shading units, 512 TMUs, and 0 ROPs. The Steam Machine GPU has 1792 shading units, 112 TMUs, and 64 ROPs. The Steam Machine GPU has 28 RT cores; the MI350P lists none.

Power and physical specifications diverge sharply. The MI350P has a 600 W TDP, a dual-slot form factor, one 16-pin power connector, and a suggested PSU of 1000 W. The Steam Machine GPU has a 110 W TDP, no power connectors, and no suggested PSU. The MI350P is 267 mm long, 111 mm high, and 40 mm wide. The Steam Machine GPU is 156 mm long, 152 mm high, and 162 mm wide.

Bus interface and display outputs also differ. The MI350P uses PCIe 5.0 x16 and has no display outputs. The Steam Machine GPU lists no bus interface and has 1x HDMI 2.1a and 1x DisplayPort 2.1.

Release dates are close: the MI350P is dated 2026-05-06 and the Steam Machine GPU is dated 2026-06-28. The Steam Machine GPU has a production status of Active, while the MI350P's production status is not listed. The MI350P's predecessor is listed as Radeon Instinct, while the Steam Machine GPU has no predecessor. Neither part lists a successor.

Architecture Differences

The architectural split is between CDNA 4.0 and RDNA 3.0. These are distinct design philosophies from AMD, and the recorded data shows how they manifest in hardware.

The MI350P uses CDNA 4.0, which is the compute-focused architecture in the Instinct (MIx) generation. Its design prioritizes FP32 and FP16 throughput, memory capacity, and memory bandwidth over graphics-specific features. The absence of ROPs, RT cores, and display outputs is consistent with this orientation. The API list for the MI350P is entirely N/A for DirectX, OpenGL, and Vulkan, indicating that it is not intended for conventional graphics application interfaces.

The Steam Machine GPU uses RDNA 3.0, with the codename Hotpink Bonefish. It belongs to the Console GPU (Valve) generation. This architecture includes 28 RT cores, 64 ROPs, and full support for DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The presence of display outputs and a 12_2 feature level indicates a part designed for interactive graphics rendering in a console environment.

The transistor counts reflect the architectural scope. The MI350P packs 73,000 million transistors into a 1190 mm² die, while the Steam Machine GPU fits 13,300 million transistors into 204 mm². The MI350P's die is 5.8 times larger in area and holds 5.5 times more transistors. Despite this, the transistor density is similar: 61.3M per mm² for the MI350P versus 65.2M per mm² for the Steam Machine GPU. The process node difference, 3 nm versus 6 nm, allows the MI350P to pack more transistors at a comparable density on the larger die.

Memory architecture follows the compute-versus-graphics divide. The MI350P uses HBM3e with a 8192-bit bus, which is typical for accelerators that need to feed large compute arrays. The Steam Machine GPU uses GDDR6 on a 128-bit bus, which is common for consumer and console graphics parts where bandwidth requirements are lower and cost constraints are tighter.

The clock behavior is also informative. The Steam Machine GPU has higher base and boost clocks (1720 MHz and 2450 MHz) than the MI350P (1000 MHz and 2200 MHz). This is typical of RDNA parts, which favor higher clocks for latency-sensitive graphics workloads, versus CDNA parts, which rely on parallelism and memory bandwidth rather than raw clock speed.

The MI350P has no RT cores, while the Steam Machine GPU has 28. This is a defining architectural difference. Ray tracing hardware is a graphics feature, and its absence on the MI350P reinforces that the part is not intended for real-time rendering workloads.

The power envelope reflects these architectural choices. The MI350P draws 600 W, requires a 1000 W suggested PSU, and uses a single 16-pin connector. The Steam Machine GPU draws 110 W and requires no external power connectors. The MI350P's power budget supports its 8192 shading units and 8.19 TB/s memory subsystem, while the Steam Machine GPU's 110 W budget is sufficient for its 1792 shading units and 288.0 GB/s memory.

The physical dimensions differ accordingly. The MI350P is a dual-slot card at 267 mm length, 111 mm height, and 40 mm width. The Steam Machine GPU is a compact unit at 156 mm length, 152 mm height, and 162 mm width, which is a more cube-like form factor suited to a console chassis.