AMD Instinct MI300A vs AMD Radeon RX 7400 OEM Comparison

Head-to-Head Benchmarks

The recorded database contains no benchmark scores for either the AMD Instinct MI300A or the AMD Radeon RX 7400 OEM. Both entries show a percentile rank of 50 against all GPUs, and the average benchmark score for each is zero. The head-to-head benchmark array is empty, meaning there are no direct comparative performance measurements available in the database at this time.

The absence of benchmark data is notable given the extreme contrast in raw compute specifications. The Instinct MI300A delivers 61.29 TFLOPS of FP32 performance, while the RX 7400 OEM provides 7.885 TFLOPS. This represents a substantial gap, with the MI300A offering approximately 7.8 times the FP32 throughput based on the recorded figures. The texture rate tells a similar story: the MI300A reaches 1,915.2 GTexel/s compared to 123.2 GTexel/s for the RX 7400 OEM, a factor of roughly 15.5.

The pixel rate comparison is inverted due to architectural design choices. The Instinct MI300A lists 0 MPixel/s with 0 ROPs, as it is not designed for rasterized graphics output. The RX 7400 OEM, by contrast, delivers 70.40 GPixel/s using its 64 ROPs. This is a fundamental split: one part is a compute accelerator without display capabilities, the other is a graphics card with full rendering output.

Memory bandwidth further separates the two. The MI300A accesses 128 GB of HBM3 across an 8192-bit bus, achieving 5.32 TB/s. The RX 7400 OEM uses 8 GB of GDDR6 on a 128-bit bus, reaching 172.8 GB/s. The bandwidth ratio is approximately 30.8 to 1 in favor of the MI300A, which aligns with its role in memory-intensive compute workloads.

Architecture Differences

The two accelerators come from different architectural lineages. The Instinct MI300A uses the CDNA 3.0 architecture on the Aqua Vanjaram chip, fabricated on a 5 nm process at TSMC. It belongs to the Instinct (MIx) generation. The Radeon RX 7400 OEM uses RDNA 3.0 on the Navi 33 chip (codename Hotpink Bonefish), built on a 6 nm process, also at TSMC. It sits in the Navi III (RX 7000) series generation.

Transistor counts differ dramatically. The MI300A packs 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4 million per mm². The RX 7400 OEM contains 13,300 million transistors on a 204 mm² die, for a density of 65.2 million per mm². The MI300A die is about five times larger in area and holds more than eleven times the transistor count.

Compute unit organization reflects the divergent purposes. The MI300A has 14,592 shading units, 912 texture mapping units, and zero ROPs. It has no ray tracing cores and no tensor cores listed. The RX 7400 OEM has 1,792 shading units, 112 TMUs, and 64 ROPs, plus 28 ray tracing cores. The RX 7400 OEM supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300A lists N/A for DirectX, OpenGL, and Vulkan, confirming its non-graphics orientation.

Clock behavior also differs. The MI300A runs at a 1000 MHz base clock and boosts to 2100 MHz. Its memory clock is 1300 MHz, with 5.2 Gbps effective data rate. The RX 7400 OEM has a 330 MHz base and 1100 MHz boost, with a 1350 MHz memory clock and 10.8 Gbps effective rate. The boost clocks are close, but the base clock gap is substantial, indicating the MI300A sustains higher operating frequencies under load.

Power delivery and physical format show the separation in use cases. The MI300A consumes 750 W TDP, uses an OAM Module slot width, has no power connectors (presumably relying on the module socket), and requires a suggested 1150 W PSU. It has no display outputs and uses a PCIe 5.0 x16 interface. The RX 7400 OEM has 55 W TDP, a single-slot design, one 6-pin power connector, a suggested 250 W PSU, and provides 1x HDMI 2.1a plus 3x DisplayPort 2.1 outputs. Its bus interface is PCIe 4.0 x8, and its physical length is 167 mm (6.6 inches).

Release timing places them far apart. The MI300A launched on December 5, 2023, succeeding the Radeon Instinct line. The RX 7400 OEM launched on August 7, 2025, with the predecessor listed as Navi II and successor as Navi IV. No launch MSRP is recorded for either product.

FAQ

Q: Which product has higher FP32 compute performance?

A: The Instinct MI300A delivers 61.29 TFLOPS of FP32, while the Radeon RX 7400 OEM provides 7.885 TFLOPS. The MI300A is roughly 7.8 times faster in this metric.

Q: Can the Instinct MI300A output video to a display?

A: No. The MI300A lists no display outputs and has 0 ROPs with a 0 MPixel/s pixel rate. It also reports N/A for DirectX, OpenGL, and Vulkan API support. The RX 7400 OEM, by contrast, offers 1x HDMI 2.1a and 3x DisplayPort 2.1 outputs.

Q: What memory configurations do these cards use?

A: The MI300A uses 128 GB of HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth. The RX 7400 OEM uses 8 GB of GDDR6 on a 128-bit bus with 172.8 GB/s bandwidth.

Q: How do their power requirements compare?

A: The MI300A has a 750 W TDP and a suggested PSU of 1150 W. The RX 7400 OEM has a 55 W TDP and a suggested PSU of 250 W. The MI300A does not use external power connectors, while the RX 7400 OEM uses one 6-pin connector.

Q: Which product supports ray tracing?

A: Only the RX 7400 OEM lists ray tracing cores, with 28 RT cores. The MI300A has no RT core count recorded.

Q: What are the transistor and die size differences?

A: The MI300A has 153,000 million transistors on a 1017 mm² die. The RX 7400 OEM has 13,300 million transistors on a 204 mm² die. The MI300A die is approximately five times larger by area.

Specification Differences

The two products differ across nearly every recorded specification. The table below highlights only the fields where values diverge.

| Specification | AMD Instinct MI300A | AMD Radeon RX 7400 OEM |

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

| Chip | Aqua Vanjaram | Navi 33 |

| Architecture | CDNA 3.0 | RDNA 3.0 |

| Codename | (none listed) | 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 | 128 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 | 14592 | 1792 |

| TMUs | 912 | 112 |

| ROPs | 0 | 64 |

| RT Cores | (none listed) | 28 |

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

| Texture Rate | 1,915.2 GTexel/s | 123.2 GTexel/s |

| FP32 Compute | 61.29 TFLOPS | 7.885 TFLOPS |

| FP16 Compute | (not listed) | 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 |

| Length | (none listed) | 167 mm, 6.6 inches |

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

| Predecessor | Radeon Instinct | Navi II |

| Successor | (none listed) | Navi IV |

| Series | (none listed) | Radeon RX 7000 series |

Fields not listed above, such as manufacturer (both AMD), foundry (both TSMC), and average benchmark score (both 0), are identical between the two entries.

The Verdict

The data positions these as opposite ends of the accelerator spectrum. The Instinct MI300A is a 750 W compute module with 61.29 TFLOPS FP32, 5.32 TB/s memory bandwidth, and no graphics output. The Radeon RX 7400 OEM is a 55 W graphics card with 7.885 TFLOPS FP32, 172.8 GB/s bandwidth, and full display connectivity including HDMI 2.1a and DisplayPort 2.1.

For compute-intensive workloads that need massive memory capacity and bandwidth, the MI300A shows clear superiority in the recorded specifications. Its 128 GB HBM3 pool and 8192-bit bus dwarf the RX 7400 OEM's 8 GB GDDR6 on a 128-bit interface. The MI300A also holds a commanding lead in shading units (14,592 versus 1,792) and texture rate (1,915.2 versus 123.2 GTexel/s).

For conventional graphics rendering, the RX 7400 OEM is the only viable option of the two. It has 64 ROPs, 28 ray tracing cores, and a 70.40 GPixel/s pixel rate, none of which the MI300A can match. The RX 7400 OEM also supports modern graphics APIs and fits in a single slot with a 250 W PSU recommendation.

The percentile ranks are identical at 50, and no benchmark scores exist to separate them empirically. The specification sheet alone, however, makes the intended use cases unambiguous. The MI300A targets server-side computation with no display path. The RX 7400 OEM targets client-side rendering with modest power draw. Any selection between them depends entirely on whether the workload requires graphics output or pure compute throughput, as the recorded data shows no overlap in those capabilities.