AMD Radeon R7 M365X vs AMD Radeon R7 M465 Comparison

FAQ

Q: Which GPU is faster in the Geekbench OpenCL benchmark?

A: The AMD Radeon R7 M365X scores 5,939 versus the R7 M465's 5,841, making the M365X 1.7% faster in this specific test. This is a narrow margin, and the M365X wins the only head-to-head benchmark recorded.

Q: How do these two GPUs compare in terms of memory bandwidth?

A: The R7 M365X has a 128-bit memory bus and delivers 64.00 GB/s of bandwidth, while the R7 M465 uses a 64-bit bus with 36.00 GB/s. The M365X offers nearly double the memory bandwidth, which is a significant advantage for texture-heavy workloads.

Q: Do both GPUs support the same modern graphics APIs?

A: No. The R7 M465 supports DirectX 12 (12_0), while the R7 M365X is limited to DirectX 12 (11_1). Both support OpenGL 4.6 and Vulkan 1.2.170, so the M465 has an edge in DirectX 12 feature level.

Q: What is the difference in transistor count and die size between the two?

A: The R7 M465 packs 1,550 million transistors on a 125 mm² die, while the R7 M365X has 950 million transistors on a 77 mm² die. Both are built on the same 28 nm TSMC process, but the M465 is a substantially larger chip.

Q: Which GPU has a higher boost clock speed?

A: The R7 M465 has a boost clock of 1024 MHz, whereas the R7 M365X does not have a listed boost clock. The M465 also has a base clock of 730 MHz, while the M365X lacks a specified base clock in the data.

Q: How do their average benchmark scores compare overall?

A: The R7 M465 has an average benchmark score of 5,841, placing it at the 33rd percentile of all GPUs. The R7 M365X has an average score of 5,416 (32nd percentile), which is dragged down by its Vulkan score of 4,893, despite a higher OpenCL score.

Where Each One Wins

The R7 M365X takes the crown in raw compute performance as measured by OpenCL. Its score of 5,939 edges out the M465's 5,841, and it also offers a Vulkan score of 4,893, a test the M465 does not appear in. For users running OpenCL-accelerated applications, the M365X is the safer bet, especially given its 64.00 GB/s memory bandwidth — a figure that doubles the M465's 36.00 GB/s. That bandwidth advantage likely helps in memory-bound tasks like high-resolution texture streaming or large buffer operations.

The R7 M465, however, wins on architectural modernity and feature support. It uses GCN 3.0 architecture versus the M365X's GCN 1.0, and it supports DirectX 12 (12_0) compared to the M365X's (11_1). This makes the M465 better suited for newer games and applications that leverage DX12's advanced feature set. Its higher boost clock (1024 MHz vs. none listed) and greater shading throughput — 786.4 GFLOPS FP32 versus 633.6 GFLOPS — suggest it can push more raw shader work when clocks are sustained.

In practice, the M365X wins for compute-heavy, bandwidth-hungry workloads, while the M465 is the pick for compatibility with modern graphics APIs and higher peak shader throughput. The M365X's larger memory bus (128-bit vs. 64-bit) is a structural advantage that no clock speed can fully compensate for in memory-bound scenarios. Conversely, the M465's newer architecture and DirectX 12 feature level give it a forward-looking edge that the older M365X cannot match.

Architecture Differences

The two GPUs come from different generations of AMD's Graphics Core Next design. The R7 M465 is built on GCN 3.0, while the R7 M365X uses the original GCN 1.0. This is a fundamental generational leap: GCN 3.0 introduced architectural refinements in compute unit efficiency and instruction scheduling that GCN 1.0 lacks.

Both chips are fabricated on TSMC's 28 nm process, but the silicon itself diverges sharply. The M465 uses the Topaz chip, which packs 1,550 million transistors into a 125 mm² die. The M365X uses the Litho chip, with 950 million transistors on a 77 mm² die. Transistor density is nearly identical (12.4M / mm² for the M465, 12.3M / mm² for the M365X), meaning the M465's larger die is simply more silicon rather than denser logic.

The memory subsystems are radically different. The M465 runs a 64-bit bus with 2 GB of GDDR5, while the M365X uses a 128-bit bus with 1 GB of GDDR5. This explains the bandwidth gap: 36.00 GB/s versus 64.00 GB/s. The M465's memory clock is 1125 MHz (4.5 Gbps effective), while the M365X's is 1000 MHz (4 Gbps effective). The M365X compensates for lower clock speed with a wider bus.

Both GPUs share the same core counts: 384 shading units, 24 texture mapping units, and 8 ROPs. However, the M465's higher clocks (730 MHz base / 1024 MHz boost vs. no base or boost listed for the M365X) translate to higher pixel and texture rates: 8.192 GPixel/s and 24.58 GTexel/s for the M465, versus 6.600 GPixel/s and 19.80 GTexel/s for the M365X.

API support also diverges. The M465 supports DirectX 12 (12_0), while the M365X only reaches DirectX 12 (11_1). Both support OpenGL 4.6 and Vulkan 1.2.170. The M465 also lists FP16 compute at 786.4 GFLOPS (1:1 ratio), while the M365X has no FP16 figure listed.

Specification Differences

| Specification | AMD Radeon R7 M465 | AMD Radeon R7 M365X |

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

| Chip | Topaz | Litho |

| Architecture | GCN 3.0 | GCN 1.0 |

| Generation | Gem System (R7 M400) | Gem System (R7 M300) |

| Transistors | 1,550 million | 950 million |

| Die Size | 125 mm² | 77 mm² |

| Base Clock | 730 MHz | Not listed |

| Boost Clock | 1024 MHz | Not listed |

| Memory Clock | 1125 MHz (4.5 Gbps effective) | 1000 MHz (4 Gbps effective) |

| Memory Size | 2 GB | 1024 MB |

| Memory Bus Width | 64 bit | 128 bit |

| Memory Bandwidth | 36.00 GB/s | 64.00 GB/s |

| Pixel Rate | 8.192 GPixel/s | 6.600 GPixel/s |

| Texture Rate | 24.58 GTexel/s | 19.80 GTexel/s |

| FP32 | 786.4 GFLOPS | 633.6 GFLOPS |

| FP16 | 786.4 GFLOPS (1:1) | Not listed |

| DirectX Support | 12 (12_0) | 12 (11_1) |

| Release Date | 2016-05-14 | 2015-05-04 |

The R7 M465 is the newer part, released roughly a year after the M365X. It carries double the memory capacity (2 GB vs. 1 GB) and a higher transistor budget, but sacrifices bus width to achieve it. The M365X retains the wider 128-bit bus, which is its key specification advantage.

Head-to-Head Benchmarks

The only direct benchmark comparison available is Geekbench OpenCL, where the AMD Radeon R7 M365X beats the AMD Radeon R7 M465 by a margin of 1.7%. The M365X scores 5,939, while the M465 trails at 5,841. This is a narrow victory, but it is consistent with the M365X's memory bandwidth advantage: 64.00 GB/s versus 36.00 GB/s. In OpenCL workloads that are memory-bound, the wider bus can more than compensate for the M465's higher clocks.

The M465's average benchmark score of 5,841 places it at the 33rd percentile of all GPUs, just behind the AMD Radeon R5 M435 (5,859, -0.3%) and Intel UHD Graphics 730 (5,929, -1.5%), but ahead of the NVIDIA GeForce GTX 550 Ti (5,731, +1.9%) and AMD Radeon HD 8730M (5,955, -1.9%). The M365X's average score of 5,416 (32nd percentile) is lower than its OpenCL score because its Vulkan result is much weaker at 4,893. Its nearest rivals include the AMD Radeon 610M (5,444, -0.5%), Intel UHD Graphics P630 (5,370, +0.9%), NVIDIA Quadro M4000 (5,467, -0.9%), and AMD Radeon R7 M445 (5,358, +1.1%).

The Vulkan score for the M365X (4,893) is 17.6% lower than its OpenCL score (5,939), indicating that it performs better in compute-oriented APIs than in graphics-oriented ones. The M465 has no Vulkan score in the data, so a direct comparison in that API is impossible. However, the M465's DirectX 12 (12_0) support suggests it may handle modern graphics APIs more efficiently than the M365X's (11_1) level.

Looking at the raw compute figures, the M465 has a clear theoretical advantage in FP32 throughput (786.4 GFLOPS vs. 633.6 GFLOPS, a 24.1% difference) and pixel rate (8.192 GPixel/s vs. 6.600 GPixel/s, a 24.1% difference). Yet the M365X still wins the OpenCL benchmark. This suggests the M365X's 128-bit memory bus is the deciding factor in real-world compute tests, allowing it to feed data to the shaders more efficiently despite lower clocks. The M465's 64-bit bus is a bottleneck that its higher clock speeds cannot overcome in bandwidth-limited scenarios.

The benchmark results paint a clear picture: in a direct OpenCL contest, the older, wider-bus GPU wins. The M365X's 1.7% lead is small but meaningful, especially given that the M465 is the newer part with more transistors and a higher clock speed. This is a case where memory subsystem design trumps raw compute specifications.