AMD Radeon R7 M465 vs AMD Radeon RX 6400 Comparison

The AMD Radeon RX 6400 and AMD Radeon R7 M465 represent two vastly different eras of AMD’s mobile and desktop GPU lineup, and the benchmark data reflects a generational chasm rather than a competitive duel. The RX 6400, built on the modern RDNA 2.0 architecture, delivers an average benchmark score of 6001, placing it in the 35th percentile of all GPUs. The R7 M465, a legacy GCN 3.0 part from 2016, manages an average score of 5841, sitting just below in the 33rd percentile. While their overall averages are separated by only 160 points, the head-to-head benchmark tells a far more dramatic story: in Geekbench OpenCL, the RX 6400 scores 32,011 against the R7 M465’s 5,841, a staggering 448% advantage. This single data point defines the entire comparison, but the nuances of their respective architectures, memory subsystems, and feature sets reveal why the newer card dominates so thoroughly.

Head-to-Head Benchmarks

The only direct benchmark comparison available is Geekbench OpenCL, and it is not close. The RX 6400 produces a score of 32,011, while the R7 M465 trails at 5,841. This translates to a 448% delta in favor of the RX 6400, meaning the newer card is roughly five and a half times faster in this compute-oriented workload. Such a margin is not incremental; it is a complete overhaul of performance class. The RX 6400’s FP32 throughput of 3.565 TFLOPS versus the R7 M465’s 786.4 GFLOPS explains the gap, as does the former’s 768 shading units versus the latter’s 384. Even the memory bandwidth disparity is enormous: the RX 6400 offers 128.0 GB/s over a 64-bit GDDR6 bus, while the R7 M465 manages only 36.00 GB/s on 64-bit GDDR5. In raw math, the RX 6400 delivers 4.5 times the FP32 compute and 3.5 times the memory bandwidth, which aligns closely with the observed 448% OpenCL lead.

Looking at the broader benchmark suite for the RX 6400, its PassMark G3D score of 7673 and GPU Compute score of 2812 show strength in both rasterization and general-purpose compute. The R7 M465 has no such scores in the data, limiting direct comparisons to the single OpenCL test. However, the RX 6400’s Geekbench Vulkan score of 16,372 and 3DMark Steel Nomad DX12 score of 176 further underscore its modern API support, which the R7 M465 lacks entirely for Vulkan 1.4 and DX12 Ultimate features. The R7 M465’s only other benchmark, Geekbench OpenCL at 5,841, is its sole data point, making it impossible to assess its DirectX or Vulkan performance directly. What the numbers do show is that the RX 6400 is not merely faster; it is in a different league, with every metric indicating a modern GPU designed for contemporary workloads.

Where Each One Wins

The RX 6400 wins every measurable category, but the nature of its victories varies. In compute-heavy tasks like OpenCL, its 448% lead is decisive, driven by its 6 nm process node, 5,400 million transistors, and RDNA 2.0 architecture with 12 ray tracing cores. The card’s FP16 performance of 7.130 TFLOPS (2:1 ratio) doubles its FP32 output, a feature the R7 M465 lacks entirely—the older card’s FP16 is identical to FP32 at 786.4 GFLOPS (1:1 ratio). This makes the RX 6400 uniquely suited for mixed-precision workloads, while the R7 M465 cannot accelerate half-precision math at all. For gaming, the RX 6400’s pixel rate of 74.27 GPixel/s and texture rate of 111.4 GTexel/s dwarf the R7 M465’s 8.192 GPixel/s and 24.58 GTexel/s, suggesting the newer card can handle modern resolutions and texture-heavy scenes far more effectively.

Where the R7 M465 might claim a niche is in legacy compatibility or power simplicity, though the data does not quantify either. Its 28 nm process and GCN 3.0 architecture support DirectX 12 (12_0) but not the 12_2 feature level of the RX 6400, so older titles that rely on DX11 or DX9 may run without issue, but the card’s 2 GB GDDR5 memory and 36.00 GB/s bandwidth are severe bottlenecks for any modern game. The RX 6400’s 4 GB GDDR6 at 128.0 GB/s is twice the capacity and over three times the bandwidth, making it the clear choice for any workload that exceeds 2 GB of VRAM. In practical terms, the R7 M465 is a vestigial entry-level part, while the RX 6400 is a capable budget-tier solution within its own generation.

The Verdict

The data is unambiguous: the AMD Radeon RX 6400 is the superior GPU by every measurable metric. Its 448% advantage in Geekbench OpenCL alone justifies a recommendation for any user prioritizing compute performance or modern gaming. The RX 6400’s 35th percentile ranking versus the R7 M465’s 33rd percentile is misleading—the former’s average score of 6001 is buoyed by diverse benchmarks including PassMark G3D (7673) and G2D (722), while the latter’s 5841 average comes from a single test. In nearest rival comparisons, the RX 6400 sits within 0.3% of the NVIDIA GeForce GTX 770M (6000) and RTX PRO 6000 Blackwell Server (5996), indicating it competes with mid-range parts from its era. The R7 M465, meanwhile, is within 1.9% of the NVIDIA GeForce GTX 550 Ti (5731) and within 1.5% of the Intel UHD Graphics 730 (5929), placing it in integrated-graphics territory. Anyone selecting between these two should choose the RX 6400 without hesitation, as its 6 nm process, ray tracing support, and 4 GB VRAM make it viable for modern titles, whereas the R7 M465 is effectively obsolete.

FAQ

Q: How much faster is the RX 6400 than the R7 M465 in OpenCL?

A: The RX 6400 scores 32,011 in Geekbench OpenCL, while the R7 M465 scores 5,841, giving the RX 6400 a 448% advantage.

Q: What are the memory specifications of each card?

A: The RX 6400 has 4 GB of GDDR6 on a 64-bit bus with 128.0 GB/s bandwidth. The R7 M465 has 2 GB of GDDR5 on a 64-bit bus with 36.00 GB/s bandwidth.

Q: Does the R7 M465 support ray tracing?

A: No, the R7 M465 has no ray tracing cores. The RX 6400 includes 12 ray tracing cores as part of its RDNA 2.0 architecture.

Q: Which card has a higher transistor density?

A: The RX 6400, built on a 6 nm process, packs 5,400 million transistors into a 107 mm² die for a density of 50.5M per mm². The R7 M465’s 28 nm process holds 1,550 million transistors on a 125 mm² die, yielding 12.4M per mm².

Q: What is the difference in FP32 compute performance?

A: The RX 6400 delivers 3.565 TFLOPS of FP32, while the R7 M465 manages 0.7864 TFLOPS (786.4 GFLOPS), a 4.5x difference.

Q: Are both cards end-of-life products?

A: Yes, both the RX 6400 and R7 M465 are marked as end-of-life in the production status data. The RX 6400 was released in January 2022, while the R7 M465 launched in May 2016.

Architecture Differences

The architectural gap between these two GPUs is generational and foundational. The RX 6400 uses the Navi 24 chip on TSMC’s 6 nm process, packing 5,400 million transistors into a 107 mm² die. This achieves a transistor density of 50.5M per mm², a figure enabled by modern lithography. In contrast, the R7 M465 relies on the Topaz chip on a 28 nm process, with 1,550 million transistors spread across a larger 125 mm² die, yielding just 12.4M per mm². The RX 6400’s RDNA 2.0 architecture introduces features the R7 M465’s GCN 3.0 cannot offer, including 12 dedicated ray tracing cores, a 2:1 FP16 ratio (7.130 TFLOPS versus 786.4 GFLOPS), and support for DirectX 12 Ultimate (12_2) and Vulkan 1.4. The R7 M465 maxes out at DirectX 12 (12_0) and Vulkan 1.2.170, missing the hardware-level ray tracing and variable rate shading that the newer API tier requires.

Memory and bandwidth further separate the two. The RX 6400 pairs 4 GB of GDDR6 with a 64-bit bus, achieving 128.0 GB/s, while the R7 M465 uses 2 GB of GDDR5 on the same bus width for just 36.00 GB/s. The clock speeds tell a similar story: the RX 6400 boosts to 2321 MHz with a base of 1923 MHz and a game clock of 2039 MHz, whereas the R7 M465 boosts to only 1024 MHz with a 730 MHz base. The RX 6400’s memory runs at 2000 MHz (16 Gbps effective) versus the R7 M465’s 1125 MHz (4.5 Gbps effective). The RX 6400 also supports PCIe 4.0 x4, doubling the interface bandwidth of the R7 M465’s PCIe 3.0 x8, though the newer card’s narrower lane count means the older part still has more total interface bandwidth. In terms of features, the RX 6400 offers display outputs (1x HDMI 2.1, 1x DisplayPort 1.4a) and a single-slot design with no power connectors and a 53 W TDP, while the R7 M465 lists no display outputs, slot width, or power specifications in the data. The RX 6400’s suggested PSU is 250 W, reflecting its efficiency, whereas the R7 M465’s power requirements are unlisted. These architectural differences—process node, transistor count, memory type, and API support—collectively explain the 448% performance gulf observed in benchmarks.