AMD Instinct MI300 vs AMD Radeon RX 7400 Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the AMD Instinct MI300 and the AMD Radeon RX 7400. The MI300 has no recorded benchmark scores, an average benchmark score of zero, and no nearest rivals listed. The RX 7400, by contrast, has eight recorded benchmark results, an average score of 2467, and sits at the 17th percentile of all GPUs in the database.

The RX 7400's benchmark results span several API generations. In 3DMark Steel Nomad DX12, it records a score of 1103. The PassMark suite shows a DirectX 9 score of 176, DirectX 10 score of 59, DirectX 11 score of 97, and DirectX 12 score of 44. Its PassMark G3D score is 11897, the G2D score is 1209, and the GPU compute score is 5152. These figures place the RX 7400 in the lower quartile of all GPUs, with the 17th percentile indicating that roughly 83% of recorded GPUs outperform it on average.

The MI300's absence from the benchmark database means no direct score comparison is possible. Its percentile rank of 50 is a neutral placeholder, not a measured performance position. The head-to-head wins count is zero for both parts, which accurately reflects the lack of overlapping benchmark data.

Where Each One Wins

Based strictly on recorded data, the RX 7400 wins in every measurable category because it is the only part with benchmark scores. It demonstrates capability across legacy APIs with its DirectX 9 score of 176, which is its highest API-specific result. Its DirectX 11 score of 97 is roughly double its DirectX 12 score of 44, suggesting stronger performance under older workloads. The G3D score of 11897 dominates its compute score of 5152, indicating a graphics-oriented workload profile.

The MI300 wins no measured benchmarks in this database. However, its architectural parameters indicate a different intended workload. The MI300 delivers 47.87 TFLOPS of FP32 performance, nearly three times the RX 7400's 16.49 TFLOPS. Its FP16 performance is listed as 47.87 TFLOPS at a 1:1 ratio, while the RX 7400 achieves 32.97 TFLOPS at a 2:1 ratio. The MI300's memory subsystem provides 5.32 TB/s of bandwidth, which is roughly 18 times the RX 7400's 288.0 GB/s. These figures point to compute-oriented strengths, though no benchmark scores confirm them.

The RX 7400's nearest rivals in the database are all low-end parts. It leads the AMD Radeon 8040S by 1.1%, the NVIDIA GeForce 710M by 1.4%, the Intel HD Graphics 610 by 1.8%, and the NVIDIA GeForce GT 710M by 1.9%. These narrow margins indicate that the RX 7400 competes in the entry-level segment, not the high-end compute segment where the MI300 sits.

Architecture Differences

The MI300 uses the Aqua Vanjaram chip built on CDNA 3.0 architecture, fabricated on a 5 nm TSMC process. The RX 7400 uses the Navi 33 chip built on RDNA 3.0 architecture, fabricated on a 6 nm TSMC process. The process node difference of one nanometer contributes to substantial transistor density divergence: the MI300 packs 153,000 million transistors into a 1017 mm² die, yielding 150.4 million transistors per square millimeter. The RX 7400 contains 13,300 million transistors on a 204 mm² die, for a density of 65.2 million per square millimeter.

The MI300 belongs to the Instinct (MIx) generation with the predecessor listed as Radeon Instinct. The RX 7400 belongs to the Radeon RX 7000 series, generation Navi III, with the codename "Hotpink Bonefish", a predecessor of Navi II, and a successor of Navi IV. The MI300 has no codename listed.

Compute unit organization differs dramatically. The MI300 contains 14080 shading units, 880 texture mapping units, and zero raster operation units. The RX 7400 contains 1792 shading units, 112 TMUs, and 64 ROPs. The MI300's pixel rate is recorded as 0 MPixel/s, while the RX 7400 delivers 147.2 GPixel/s. The texture rates are 1,496.0 GTexel/s for the MI300 versus 257.6 GTexel/s for the RX 7400.

The MI300 has no ray tracing cores listed, while the RX 7400 includes 28 ray tracing cores. Neither part lists tensor cores. The MI300 reports no API support for DirectX, OpenGL, or Vulkan, while the RX 7400 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Specification Differences

Memory configuration marks the largest specification gap. The MI300 uses 128 GB of HBM3 across an 8192 bit bus, delivering 5.32 TB/s bandwidth. The RX 7400 uses 8 GB of GDDR6 across a 128 bit bus, delivering 288.0 GB/s. The MI300's memory clock is 1300 MHz with 5.2 Gbps effective, while the RX 7400 runs at 2250 MHz with 18 Gbps effective.

Clock speeds favor the RX 7400 in base and boost frequencies. The RX 7400 has a base clock of 1452 MHz and a boost clock of 2300 MHz, with a game clock of 2200 MHz. The MI300 has a base clock of 1000 MHz and a boost clock of 1700 MHz. The RX 7400's higher clocks reflect its graphics-oriented design, while the MI300 relies on massive parallel width.

Power draw differs by an order of magnitude. The MI300 has a TDP of 600 W with dual 8-pin power connectors and a suggested PSU of 1000 W. The RX 7400 has a TDP of 43 W with a single 6-pin connector and a suggested PSU of 200 W. The MI300 is 267 mm long and 111 mm tall, while the RX 7400 has no dimensions listed but is specified as dual-slot.

Bus interfaces differ: the MI300 uses PCIe 5.0 x16, while the RX 7400 uses PCIe 4.0 x8. Display outputs differ completely. The MI300 has no display outputs, while the RX 7400 provides 1x HDMI 2.1a and 3x DisplayPort 2.1. Release dates are also distinct: the MI300 launched on 2023-01-03, while the RX 7400 launched on 2025-08-07. Neither part has a launch MSRP recorded in the database.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The MI300 delivers 47.87 TFLOPS of FP32, which is approximately 2.9 times the RX 7400's 16.49 TFLOPS.

Q: How do the memory bandwidth figures compare?

A: The MI300 provides 5.32 TB/s of bandwidth from 128 GB of HBM3 on an 8192 bit bus. The RX 7400 provides 288.0 GB/s from 8 GB of GDDR6 on a 128 bit bus.

Q: Does the RX 7400 support ray tracing?

A: Yes, the RX 7400 includes 28 ray tracing cores. The MI300 has no ray tracing cores listed.

Q: What is the RX 7400's average benchmark score and percentile?

A: The RX 7400 has an average benchmark score of 2467 and sits at the 17th percentile of all GPUs in the database.

Q: Which GPU has a higher transistor density?

A: The MI300 has a transistor density of 150.4 million per square millimeter on a 5 nm process. The RX 7400 has 65.2 million per square millimeter on a 6 nm process.

Q: What are the TDP requirements for each GPU?

A: The MI300 has a TDP of 600 W with a suggested PSU of 1000 W. The RX 7400 has a TDP of 43 W with a suggested PSU of 200 W.