AMD Radeon R7 M365X vs AMD Radeon RX 6400 Comparison

Head-to-Head Benchmarks

The benchmark database records two direct comparisons between the AMD Radeon RX 6400 and the AMD Radeon R7 M365X, and the results are decisively one-sided. In the Geekbench OpenCL test, the RX 6400 scores 32,011 points against the R7 M365X’s 5,939 points, a difference of 439%. That is not a marginal improvement; it is a generational leap in raw compute throughput. The OpenCL workload exercises general-purpose GPU compute, and the RX 6400’s RDNA 2.0 architecture with 768 shading units simply overwhelms the older GCN 1.0 part with 384 shading units.

The second recorded test, Geekbench Vulkan, shows a similar pattern. The RX 6400 posts 16,372 points, while the R7 M365X manages 4,893 points, giving the RX 6400 a 234.6% advantage. Vulkan is a low-level graphics API, and the RX 6400’s support for Vulkan 1.4 versus the R7 M365X’s Vulkan 1.2.170 explains part of the gap, but the sheer hardware disparity is the dominant factor. The RX 6400 has twice the shading units, twice the texture mapping units, and four times the render output units of the R7 M365X, so its dominance across both API workloads is consistent with the architectural specs.

The database’s aggregate scores corroborate this. The RX 6400 has an average benchmark score of 6,001 across all recorded tests, while the R7 M365X averages 5,416. That is a narrower overall gap than the head-to-head tests suggest, largely because the RX 6400 has a much larger pool of benchmarks (including PassMark tests where it scores 7,673 in G3D and 2,812 in compute), whereas the R7 M365X only has two recorded Geekbench results. Still, the RX 6400 wins 2 out of 2 head-to-head comparisons, with no wins recorded for the R7 M365X.

Looking at the RX 6400’s other benchmark results, its PassMark DirectX 9 score of 93 and DirectX 11 score of 70 indicate strong legacy API performance, while its DirectX 12 score of 30 is lower, reflecting the test’s specific workload characteristics. The R7 M365X lacks any PassMark entries in the database, so no direct comparison is possible there. The RX 6400 also shows strong compute capabilities in PassMark GPU Compute with 2,812 points, a figure that aligns with its OpenCL dominance.

The Verdict

The data points to a single conclusion: the AMD Radeon RX 6400 is the superior product for every measurable workload recorded in the database. Its 439% lead in OpenCL and 234.6% lead in Vulkan are not close calls; they are outright victories. The RX 6400 also holds a higher percentile ranking, sitting in the 35th percentile of all GPUs, versus the R7 M365X’s 32nd percentile. While both are end-of-life products, the RX 6400 is from the Radeon RX 6000 series with RDNA 2.0 architecture, while the R7 M365X belongs to the older R7 M300 series with GCN 1.0.

Who should pick the RX 6400? Any user needing modern API support, higher compute throughput, or better memory bandwidth. The RX 6400 offers 4 GB of GDDR6 memory with 128.0 GB/s bandwidth, compared to the R7 M365X’s 1 GB of GDDR5 with 64.00 GB/s. That 2x bandwidth advantage directly impacts texture streaming and high-resolution workloads. The RX 6400 also supports DirectX 12 Ultimate (12_2), while the R7 M365X only reaches DirectX 12 (11_1), meaning games and applications built for newer feature levels will run far better on the RX 6400.

Who should pick the R7 M365X? The database records no scenario where it wins. Its only advantages are a wider 128-bit memory bus (versus 64-bit on the RX 6400) and a smaller die size (77 mm² versus 107 mm²), but the RX 6400 compensates with faster memory clocks and a more efficient 6 nm process versus 28 nm. The R7 M365X also has a lower launch date (2015) and fewer recorded tests, making it a weaker candidate for any modern workload. For legacy applications that only use Vulkan 1.2 or DirectX 11, the R7 M365X might suffice, but the RX 6400 still outperforms it in those same APIs based on the recorded scores.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon RX 6400 averages 6,001 points across all recorded tests, while the AMD Radeon R7 M365X averages 5,416 points. The RX 6400 leads by 585 points.

Q: What is the largest recorded performance gap between the two?

A: The Geekbench OpenCL test shows the RX 6400 scoring 32,011 versus the R7 M365X’s 5,939, a 439% difference. This is the largest delta in the head-to-head data.

Q: Does the R7 M365X win any benchmark?

A: No. The database records 2 head-to-head tests (Geekbench OpenCL and Vulkan), and the RX 6400 wins both. The R7 M365X has zero recorded wins.

Q: How do their memory configurations differ?

A: The RX 6400 has 4 GB of GDDR6 on a 64-bit bus with 128.0 GB/s bandwidth. The R7 M365X has 1 GB of GDDR5 on a 128-bit bus with 64.00 GB/s bandwidth. The RX 6400 has double the bandwidth despite a narrower bus.

Q: Which GPU supports newer APIs?

A: The RX 6400 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The R7 M365X supports DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.170. The RX 6400 is ahead on both DirectX and Vulkan.

Q: What do the percentile rankings indicate?

A: The RX 6400 sits in the 35th percentile of all GPUs, while the R7 M365X sits in the 32nd percentile. This means the RX 6400 outperforms a larger share of the GPU population in the database.

Specification Differences

| Specification | AMD Radeon RX 6400 | AMD Radeon R7 M365X |

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

| Process Node | 6 nm | 28 nm |

| Transistors | 5,400 million | 950 million |

| Die Size | 107 mm² | 77 mm² |

| Transistor Density | 50.5M / mm² | 12.3M / mm² |

| Memory Size | 4 GB | 1024 MB |

| Memory Type | GDDR6 | GDDR5 |

| Memory Bus Width | 64 bit | 128 bit |

| Memory Bandwidth | 128.0 GB/s | 64.00 GB/s |

| Memory Clock | 2000 MHz (16 Gbps effective) | 1000 MHz (4 Gbps effective) |

| Shading Units | 768 | 384 |

| Texture Mapping Units | 48 | 24 |

| Render Output Units | 32 | 8 |

| Pixel Rate | 74.27 GPixel/s | 6.600 GPixel/s |

| Texture Rate | 111.4 GTexel/s | 19.80 GTexel/s |

| FP32 Performance | 3.565 TFLOPS | 633.6 GFLOPS |

| FP16 Performance | 7.130 TFLOPS (2:1) | null |

| TDP | 53 W | null |

| Slot Width | Single-slot | null |

| Power Connectors | None | null |

| Suggested PSU | 250 W | null |

| Bus Interface | PCIe 4.0 x4 | PCIe 3.0 x8 |

| Display Outputs | 1x HDMI 2.1, 1x DisplayPort 1.4a | null |

| DirectX Support | 12 Ultimate (12_2) | 12 (11_1) |

| Vulkan Support | 1.4 | 1.2.170 |

Architecture Differences

The architectural divide between these two GPUs is fundamental. The RX 6400 is built on RDNA 2.0 (chip: Navi 24) from the Radeon RX 6000 series, using a 6 nm TSMC process with 5,400 million transistors on a 107 mm² die. Its transistor density is 50.5 million per square millimeter, a figure that reflects the advanced manufacturing node. In contrast, the R7 M365X uses GCN 1.0 (chip: Litho) from the R7 M300 series, fabricated on a 28 nm TSMC process with 950 million transistors on a 77 mm² die, yielding a density of just 12.3 million per square millimeter.

The RX 6400’s RDNA 2.0 architecture brings hardware ray tracing support with 12 dedicated RT cores, a feature entirely absent from the R7 M365X, which has no RT cores listed. The RX 6400 also includes 32 render output units versus 8 on the R7 M365X, which is why its pixel rate (74.27 GPixel/s) is over 11 times higher than the R7 M365X’s 6.600 GPixel/s. Texture rate tells a similar story: 111.4 GTexel/s versus 19.80 GTexel/s, driven by 48 TMUs against 24.

Memory architecture differs sharply as well. The RX 6400 uses 4 GB of GDDR6 on a 64-bit bus, but its 2000 MHz memory clock (16 Gbps effective) delivers 128.0 GB/s. The R7 M365X uses 1 GB of GDDR5 on a wider 128-bit bus, yet its slower 1000 MHz clock (4 Gbps effective) yields only 64.00 GB/s. The RX 6400 achieves double the bandwidth with half the bus width, proof of the efficiency of newer memory technology.

Compute capabilities are equally divergent. The RX 6400 delivers 3.565 TFLOPS FP32 and 7.130 TFLOPS FP16 (2:1 ratio), while the R7 M365X manages only 633.6 GFLOPS FP32 and has no FP16 figures recorded. The RX 6400’s 768 shading units double the R7 M365X’s 384, and its 53 W TDP (with no external power connectors and a 250 W suggested PSU) indicates a far more power-efficient design. The R7 M365X has no TDP, slot width, or power connector data in the database.

Connectivity also differs: the RX 6400 offers PCIe 4.0 x4, while the R7 M365X uses PCIe 3.0 x8. The RX 6400 has explicit display outputs (1x HDMI 2.1 and 1x DisplayPort 1.4a), whereas the R7 M365X lists none. Finally, the API support gap is notable: the RX 6400 supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the R7 M365X is limited to DirectX 12 (11_1) and Vulkan 1.2.170. Both support OpenGL 4.6, but that is where the common ground ends. The RX 6400’s generation is listed as Navi II (RX 6000), with a predecessor of Navi and successor of Navi III, while the R7 M365X belongs to the Gem System (R7 M300) generation, with a predecessor of Solar System and successor of Polaris Mobile.