AMD Instinct MI300X vs AMD Steam Machine GPU Comparison

Head-to-Head Benchmarks

The recorded database shows a single benchmark entry for the AMD Instinct MI300X, the Geekbench OpenCL test, with a score of 317,994 points. This places the accelerator at the 100th percentile of all GPUs in the database. The AMD Steam Machine GPU has no benchmark scores recorded, holding a 50th percentile position with an average score of zero. Direct comparison between the two is therefore limited to the MI300X’s absolute performance and its position relative to other data center accelerators.

The MI300X’s score of 317,994 sits between several NVIDIA offerings in the nearest rivals list. It trails the NVIDIA B200, which averages 345,482 points, a difference of 8%. It also falls short of the NVIDIA H200 NVL, which averages 334,891 points, a gap of 5%. On the other side, the MI300X leads the NVIDIA L40S, which averages 295,763 points, by 7.5%. The advantage over the NVIDIA RTX 6000 Ada Generation is larger, with that card averaging 287,237 points, placing the MI300X 10.7% ahead. These deltas indicate that the MI300X occupies a strong mid-to-high position among professional accelerators, though it is not the absolute leader in this specific workload.

Because the Steam Machine GPU has no recorded scores, the head-to-head comparison cannot yield percentage deltas or win counts. The database records zero wins for each side. The MI300X’s raw compute output, however, is substantially higher than the Steam Machine GPU’s. The MI300X delivers 81.72 TFLOPS of FP32 performance, while the Steam Machine GPU delivers 17.56 TFLOPS. That is a 4.65 times difference in favor of the MI300X. Texture rate follows a similar pattern: the MI300X reaches 2,553.6 GTexel/s against the Steam Machine GPU’s 274.4 GTexel/s. Pixel rate is a different story, the MI300X reports 0 MPixel/s due to its architecture lacking traditional raster output units, while the Steam Machine GPU achieves 156.8 GPixel/s.

Memory bandwidth also diverges sharply. The MI300X uses 192 GB of HBM3 across an 8192-bit bus, yielding 5.32 TB/s. The Steam Machine GPU uses 8 GB of GDDR6 on a 128-bit bus, yielding 288.0 GB/s. The MI300X’s bandwidth is roughly 18.5 times higher. These figures reflect the fundamentally different purposes of the two parts, one is a server accelerator designed for massive parallel workloads, the other is a compact console GPU.

FAQ

Q: What is the average benchmark score for the AMD Instinct MI300X?

A: The MI300X has an average benchmark score of 317,994, based on the Geekbench OpenCL test. This places it at the 100th percentile of all GPUs in the database.

Q: Does the AMD Steam Machine GPU have any benchmark scores?

A: No. The database records no benchmark entries for the Steam Machine GPU, giving it an average score of zero and a 50th percentile ranking.

Q: How does the MI300X compare to the NVIDIA H200 NVL?

A: The MI300X scores 317,994, which is 5% lower than the NVIDIA H200 NVL’s average score of 334,891.

Q: What is the FP32 compute difference between the two AMD parts?

A: The MI300X delivers 81.72 TFLOPS of FP32 performance, while the Steam Machine GPU delivers 17.56 TFLOPS. The MI300X is approximately 4.65 times higher in this metric.

Q: What memory configurations do the two GPUs use?

A: The MI300X uses 192 GB of HBM3 with an 8192-bit bus and 5.32 TB/s bandwidth. The Steam Machine GPU uses 8 GB of GDDR6 with a 128-bit bus and 288.0 GB/s bandwidth.

Q: Which GPU has a higher pixel rate?

A: The Steam Machine GPU has a pixel rate of 156.8 GPixel/s. The MI300X reports 0 MPixel/s, as it has no raster output units.

Architecture Differences

The two GPUs come from different architectural families within AMD’s lineup. The MI300X uses CDNA 3.0 architecture, built on the Aqua Vanjaram chip. This is a compute-focused design with no display outputs and no DirectX, OpenGL, or Vulkan API support. It is fabricated on a 5 nm process at TSMC, containing 153,000 million transistors on a 1017 mm² die. The transistor density is 150.4 million per mm². The Steam Machine GPU uses RDNA 3.0 architecture, built on the Navi 33 chip with the codename Hotpink Bonefish. It uses a 6 nm process at TSMC, with 13,300 million transistors on a 204 mm² die, yielding a density of 65.2 million per mm².

The MI300X’s compute configuration includes 19,456 shading units and 1,216 texture mapping units, but zero ROPs. It has no dedicated ray tracing cores and no tensor cores listed. Its FP16 performance is identical to FP32 at 81.72 TFLOPS with a 1:1 ratio. The Steam Machine GPU has 1,792 shading units, 112 TMUs, and 64 ROPs. It includes 28 ray tracing cores and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Its FP16 performance is also 1:1 with FP32 at 17.56 TFLOPS.

Clock speeds differ as well. The MI300X operates at a base clock of 1000 MHz with a boost of 2100 MHz. Memory runs at 1300 MHz with 5.2 Gbps effective data rate. The Steam Machine GPU has a base clock of 1720 MHz, a game clock of 2250 MHz, and a boost of 2450 MHz. Its memory runs at 2250 MHz with 18 Gbps effective. The MI300X’s power target is 750 W with a suggested PSU of 1150 W, while the Steam Machine GPU has a 110 W TDP and no suggested PSU listed.

Physical form factors also separate the two. The MI300X is an OAM module with no power connectors and no display outputs. The Steam Machine GPU has dimensions of 156 mm by 152 mm by 162 mm, includes 1x HDMI 2.1a and 1x DisplayPort 2.1 outputs, and is marked as Active in production status. The MI300X was released on 2023-12-05, while the Steam Machine GPU has a release date of 2026-06-28.

The Verdict

The data indicates that the AMD Instinct MI300X is built for high-throughput compute workloads, with a Geekbench OpenCL score of 317,994 that places it in the 100th percentile. Its nearest rivals show a tight competitive band: it is 5% behind the NVIDIA H200 NVL, 8% behind the NVIDIA B200, but 7.5% ahead of the NVIDIA L40S and 10.7% ahead of the NVIDIA RTX 6000 Ada Generation. This positions the MI300X as a strong contender for data center tasks that rely on massive memory bandwidth and FP32 throughput.

The AMD Steam Machine GPU, by contrast, has no recorded benchmark scores and sits at the 50th percentile. Its specifications point to a consumer-oriented part, with ray tracing cores, display outputs, and API support for DirectX 12 Ultimate and Vulkan 1.4. Its pixel rate of 156.8 GPixel/s and FP32 of 17.56 TFLOPS are modest compared to the MI300X, but it operates at a 110 W TDP, far lower than the MI300X’s 750 W.

For users selecting a device strictly from database measurements, the MI300X is the clear choice for compute-heavy applications where OpenCL performance and memory capacity matter. The Steam Machine GPU offers no benchmark data to validate its performance, so its suitability rests on its architectural features, such as ray tracing and display connectivity. The MI300X’s lack of display outputs and graphics API support disqualifies it for any rendering or gaming role. The Steam Machine GPU’s 8 GB memory and 288.0 GB/s bandwidth are sufficient for its intended console context, but they are dwarfed by the MI300X’s 192 GB and 5.32 TB/s.

Specification Differences

| Specification | AMD Instinct MI300X | AMD Steam Machine GPU |

| --- | --- | --- |

| Architecture | CDNA 3.0 | RDNA 3.0 |

| Chip | Aqua Vanjaram | Navi 33 |

| Process Node | 5 nm | 6 nm |

| Transistors | 153,000 million | 13,300 million |

| Die Size | 1017 mm² | 204 mm² |

| Transistor Density | 150.4M / mm² | 65.2M / mm² |

| Base Clock | 1000 MHz | 1720 MHz |

| Boost Clock | 2100 MHz | 2450 MHz |

| Game Clock | None | 2250 MHz |

| Memory Size | 192 GB | 8 GB |

| Memory Type | HBM3 | GDDR6 |

| Memory Bus Width | 8192 bit | 128 bit |

| Memory Bandwidth | 5.32 TB/s | 288.0 GB/s |

| Shading Units | 19,456 | 1,792 |

| TMUs | 1,216 | 112 |

| ROPs | 0 | 64 |

| Ray Tracing Cores | None | 28 |

| Pixel Rate | 0 MPixel/s | 156.8 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 274.4 GTexel/s |

| FP32 Performance | 81.72 TFLOPS | 17.56 TFLOPS |

| FP16 Performance | 81.72 TFLOPS (1:1) | 17.56 TFLOPS (1:1) |

| TDP | 750 W | 110 W |

| Slot Width | OAM Module | None |

| Power Connectors | None | None |

| Suggested PSU | 1150 W | None |

| Bus Interface | PCIe 5.0 x16 | None |

| Display Outputs | No outputs | 1x HDMI 2.1a, 1x DisplayPort 2.1 |

| DirectX Support | N/A | 12 Ultimate (12_2) |

| OpenGL Support | N/A | 4.6 |

| Vulkan Support | N/A | 1.4 |

| Dimensions | None | 156 mm, 152 mm, 162 mm |

| Production Status | None | Active |

| Release Date | 2023-12-05 | 2026-06-28 |