AMD Instinct MI308X vs AMD Radeon RX 7400 OEM Comparison

Head-to-Head Benchmarks

The benchmark database contains no recorded head-to-head measurements for the AMD Instinct MI308X and the AMD Radeon RX 7400 OEM. Both entries show an average benchmark score of zero, and the wins counter for each product is zero. This absence of data is itself informative: the two accelerators target entirely different segments, and no standardized workload has yet produced comparable results for both.

The MI308X posts an FP32 throughput of 81.72 TFLOPS and FP16 of 81.72 TFLOPS (1:1). The RX 7400 OEM delivers 7.885 TFLOPS for both FP32 and FP16 (1:1). The ratio is roughly 10.4 to 1 in raw floating-point throughput, but without benchmark scores, this remains a theoretical ceiling rather than a measured outcome. Texture rate tells a similar story: 2,553.6 GTexel/s for the MI308X against 123.2 GTexel/s for the RX 7400 OEM, a factor of about 20.7.

Pixel rate inverts the pattern. The MI308X records 0 MPixel/s, as it has no raster operation units (ROPs count is zero). The RX 7400 OEM shows 70.40 GPixel/s with 64 ROPs. This is not a performance gap, it is a fundamental difference in output capability. The MI308X is not designed to produce display frames, while the RX 7400 OEM is a conventional graphics card.

Neither product has any nearest rivals listed in the database, and both sit at the 50th percentile against all GPUs. That percentile is a placeholder for incomplete data, not a meaningful ranking. The database confirms zero wins for each side, so no workload currently favors one over the other in recorded measurements.

Architecture Differences

The MI308X uses the Aqua Vanjaram chip built on CDNA 3.0 architecture, fabricated by TSMC on a 5 nm process. The RX 7400 OEM uses the Navi 33 chip built on RDNA 3.0 architecture, also TSMC but on a 6 nm node. The process gap is one generation, yet the transistor counts diverge dramatically: the MI308X integrates 153,000 million transistors on a 1017 mm² die, while the RX 7400 OEM packs 13,300 million transistors into 204 mm². Transistor density follows: 150.4M per mm² for the MI308X, 65.2M per mm² for the RX 7400 OEM. The MI308X achieves roughly 2.3 times the density despite the older node, indicating a far more complex design.

Shading units underline the scale difference. The MI308X has 19,456 shading units and 1,216 texture mapping units. The RX 7400 OEM has 1,792 shading units and 112 TMUs. The MI308X also carries 28 ray tracing cores? No, that is the RX 7400 OEM. The MI308X lists no RT cores and no tensor cores, while the RX 7400 OEM has 28 RT cores and no tensor cores. The absence of RT cores on the MI308X aligns with its compute-focused CDNA design; the presence of 28 RT cores on the RX 7400 OEM matches its graphics-oriented RDNA lineage.

Memory architecture separates the two completely. The MI308X uses 192 GB of HBM3 on a 8192-bit bus, yielding 5.32 TB/s of bandwidth. The RX 7400 OEM uses 8 GB of GDDR6 on a 128-bit bus, yielding 172.8 GB/s. That is roughly a 30.8 times bandwidth advantage for the MI308X. Clock speeds tell a nuanced story: the MI308X runs at a base of 1000 MHz and boosts to 2100 MHz, while the RX 7400 OEM runs at a low 330 MHz base and 1100 MHz boost. The RX 7400 OEM memory clock is 1350 MHz (10.8 Gbps effective) versus 1300 MHz (5.2 Gbps effective) for the MI308X, but the MI308X compensates with its enormous bus width.

The MI308X has no display outputs, no DirectX, OpenGL, or Vulkan API support (all listed as N/A). The RX 7400 OEM supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, with outputs of 1x HDMI 2.1a and 3x DisplayPort 2.1. The MI308X uses a PCIe 5.0 x16 interface and an OAM module slot, while the RX 7400 OEM uses PCIe 4.0 x8 and a single-slot form factor. The MI308X draws 750 W with a suggested PSU of 1150 W and no power connectors (board power via OAM), while the RX 7400 OEM draws 55 W with a suggested PSU of 250 W and a single 6-pin connector.

Where Each One Wins

The data indicates no benchmark wins for either product, so any use-case split must derive from architectural specifications rather than measured results. The MI308X wins in every metric tied to raw compute throughput: FP32, FP16, texture rate, memory capacity, memory bandwidth, and transistor count. It is built for data-center workloads where massive parallel floating-point operations and enormous memory pools matter. The 192 GB HBM3 pool with 5.32 TB/s bandwidth supports large models or datasets that would never fit in the RX 7400 OEM's 8 GB GDDR6.

The RX 7400 OEM wins in every metric tied to display output and graphics API support. It has 64 ROPs and a 70.40 GPixel/s pixel rate, supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and offers HDMI 2.1a plus DisplayPort 2.1 outputs. It also wins decisively on power draw: 55 W versus 750 W, a 13.6 times difference, and its 167 mm length fits in compact systems. The suggested PSU of 250 W versus 1150 W reinforces this gap.

The MI308X has zero ROPs and zero pixel rate, making it unusable for traditional rendering to a screen. The RX 7400 OEM has no tensor cores and lacks the MI308X's shading unit count by a factor of 10.9, making it unsuitable for the MI308X's intended compute workloads. The two products do not compete; they coexist in separate domains. One processes frames, the other processes data.

FAQ

Q: Which product has higher FP32 performance?

A: The AMD Instinct MI308X delivers 81.72 TFLOPS FP32, while the AMD Radeon RX 7400 OEM delivers 7.885 TFLOPS FP32. The MI308X is approximately 10.4 times higher.

Q: Does the MI308X support display outputs?

A: No. The MI308X lists no display outputs and has 0 MPixel/s pixel rate with zero ROPs. The RX 7400 OEM provides 1x HDMI 2.1a and 3x DisplayPort 2.1 outputs.

Q: What is the memory capacity difference?

A: The MI308X has 192 GB of HBM3 on a 8192-bit bus, while the RX 7400 OEM has 8 GB of GDDR6 on a 128-bit bus. The MI308X also has 5.32 TB/s bandwidth versus 172.8 GB/s.

Q: Which product has ray tracing cores?

A: The RX 7400 OEM has 28 ray tracing cores. The MI308X lists no ray tracing cores.

Q: How do power requirements compare?

A: The MI308X has a 750 W TDP with a suggested PSU of 1150 W. The RX 7400 OEM has a 55 W TDP with a suggested PSU of 250 W.

Q: Which product supports modern graphics APIs?

A: The RX 7400 OEM supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI308X lists all graphics APIs as N/A.

Specification Differences

| Field | AMD Instinct MI308X | AMD Radeon RX 7400 OEM |

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

| Chip | Aqua Vanjaram | Navi 33 |

| Architecture | CDNA 3.0 | RDNA 3.0 |

| Codename | None | Hotpink Bonefish |

| Generation | Instinct (MIx) | Navi III (RX 7000) |

| 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 | 330 MHz |

| Boost Clock | 2100 MHz | 1100 MHz |

| Memory Clock | 1300 MHz 5.2 Gbps effective | 1350 MHz 10.8 Gbps effective |

| Memory Size | 192 GB | 8 GB |

| Memory Type | HBM3 | GDDR6 |

| Memory Bus Width | 8192 bit | 128 bit |

| Memory Bandwidth | 5.32 TB/s | 172.8 GB/s |

| Shading Units | 19456 | 1792 |

| TMUs | 1216 | 112 |

| ROPs | 0 | 64 |

| RT Cores | None | 28 |

| Pixel Rate | 0 MPixel/s | 70.40 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 123.2 GTexel/s |

| FP32 | 81.72 TFLOPS | 7.885 TFLOPS |

| FP16 | 81.72 TFLOPS (1:1) | 7.885 TFLOPS (1:1) |

| TDP | 750 W | 55 W |

| Slot Width | OAM Module | Single-slot |

| Power Connectors | None | 1x 6-pin |

| Suggested PSU | 1150 W | 250 W |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 x8 |

| Display Outputs | No outputs | 1x HDMI 2.1a, 3x DisplayPort 2.1 |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | Not listed | 167 mm 6.6 inches length |

| Release Date | 2023-12-05 | 2025-08-07 |

| Predecessor | Radeon Instinct | Navi II |

| Successor | None | Navi IV |

The Verdict

The data offers a clear split. The AMD Instinct MI308X is a compute accelerator with no display path, no graphics API support, and no ROPs. Its 81.72 TFLOPS FP32, 192 GB HBM3, and 5.32 TB/s bandwidth position it for server workloads where rendering to a screen is irrelevant. The 750 W TDP and OAM module form factor confirm this orientation.

The AMD Radeon RX 7400 OEM is a conventional graphics card. It has 64 ROPs, 28 RT cores, DirectX 12 Ultimate support, and three DisplayPort 2.1 outputs plus one HDMI 2.1a. Its 55 W TDP and 167 mm length make it suitable for low-power, compact systems. The 8 GB GDDR6 and 172.8 GB/s bandwidth serve typical desktop rendering tasks.

Who should pick which depends entirely on the workload, not on preference. Select the MI308X for massive parallel compute, large memory footprints, and data-center deployment. Select the RX 7400 OEM for display output, graphics API compatibility, and low power draw. The benchmark database shows no crossover, and the specifications reinforce that the two products do not overlap in function.