AMD Radeon RX 6400
AMD graphics card specifications and benchmark scores
Ray TracingAt a Glance
AMDAMD Radeon RX 6400 Specifications
GPU Core
Shader units and compute resources
The AMD Radeon RX 6400 GPU core specifications define its raw processing power for graphics and compute workloads. Shading units (also called CUDA cores, stream processors, or execution units depending on manufacturer) handle the parallel calculations required for rendering. TMUs (Texture Mapping Units) process texture data, while ROPs (Render Output Units) handle final pixel output. Higher shader counts generally translate to better GPU benchmark performance, especially in demanding games and 3D applications.
RX 6400 Clock Speeds
GPU and memory frequencies
Clock speeds directly impact the Radeon RX 6400's performance in GPU benchmarks and real-world gaming. The base clock represents the minimum guaranteed frequency, while the boost clock indicates peak performance under optimal thermal conditions. Memory clock speed affects texture loading and frame buffer operations. The Radeon RX 6400 by AMD dynamically adjusts frequencies based on workload, temperature, and power limits to maximize performance while maintaining stability.
AMD's Radeon RX 6400 Memory
VRAM capacity and bandwidth
VRAM (Video RAM) is dedicated memory for storing textures, frame buffers, and shader data. The Radeon RX 6400's memory capacity determines how well it handles high-resolution textures and multiple displays. Memory bandwidth, measured in GB/s, affects how quickly data moves between the GPU and VRAM. Higher bandwidth improves performance in memory-intensive scenarios like 4K gaming. The memory bus width and type (GDDR6, GDDR6X, HBM) significantly influence overall GPU benchmark scores.
Radeon RX 6400 by AMD Cache
On-chip cache hierarchy
On-chip cache provides ultra-fast data access for the RX 6400, reducing the need to fetch data from slower VRAM. L1 and L2 caches store frequently accessed data close to the compute units. AMD's Infinity Cache (L3) dramatically increases effective bandwidth, improving GPU benchmark performance without requiring wider memory buses. Larger cache sizes help maintain high frame rates in memory-bound scenarios and reduce power consumption by minimizing VRAM accesses.
RX 6400 Theoretical Performance
Compute and fill rates
Theoretical performance metrics provide a baseline for comparing the AMD Radeon RX 6400 against other graphics cards. FP32 (single-precision) performance, measured in TFLOPS, indicates compute capability for gaming and general GPU workloads. FP64 (double-precision) matters for scientific computing. Pixel and texture fill rates determine how quickly the GPU can render complex scenes. While real-world GPU benchmark results depend on many factors, these specifications help predict relative performance levels.
Radeon RX 6400 Ray Tracing & AI
Hardware acceleration features
The AMD Radeon RX 6400 includes dedicated hardware for ray tracing and AI acceleration. RT cores handle real-time ray tracing calculations for realistic lighting, reflections, and shadows in supported games. Tensor cores (NVIDIA) or XMX cores (Intel) accelerate AI workloads including DLSS, FSR, and XeSS upscaling technologies. These features enable higher visual quality without proportional performance costs, making the RX 6400 capable of delivering both stunning graphics and smooth frame rates in modern titles.
RDNA 2.0 Architecture & Process
Manufacturing and design details
The AMD Radeon RX 6400 is built on AMD's RDNA 2.0 architecture, which defines how the GPU processes graphics and compute workloads. The manufacturing process node affects power efficiency, thermal characteristics, and maximum clock speeds. Smaller process nodes pack more transistors into the same die area, enabling higher performance per watt. Understanding the architecture helps predict how the RX 6400 will perform in GPU benchmarks compared to previous generations.
Power & Thermal
TDP and power requirements
Power specifications for the AMD Radeon RX 6400 determine PSU requirements and thermal management needs. TDP (Thermal Design Power) indicates the heat output under typical loads, guiding cooler selection. Power connector requirements ensure adequate power delivery for stable operation during demanding GPU benchmarks. The suggested PSU wattage accounts for the entire system, not just the graphics card. Efficient power delivery enables the Radeon RX 6400 to maintain boost clocks without throttling.
Radeon RX 6400 by AMD Physical & Connectivity
Dimensions and outputs
Physical dimensions of the AMD Radeon RX 6400 are critical for case compatibility. Card length, height, and slot width determine whether it fits in your chassis. The PCIe interface version affects bandwidth for communication with the CPU. Display outputs define monitor connectivity options, with modern cards supporting multiple high-resolution displays simultaneously. Verify these specifications against your case and motherboard before purchasing to ensure a proper fit.
AMD API Support
Graphics and compute APIs
API support determines which games and applications can fully utilize the AMD Radeon RX 6400. DirectX 12 Ultimate enables advanced features like ray tracing and variable rate shading. Vulkan provides cross-platform graphics capabilities with low-level hardware access. OpenGL remains important for professional applications and older games. CUDA (NVIDIA) and OpenCL enable GPU compute for video editing, 3D rendering, and scientific applications. Higher API versions unlock newer graphical features in GPU benchmarks and games.
Radeon RX 6400 Product Information
Release and pricing details
The AMD Radeon RX 6400 is manufactured by AMD as part of their graphics card lineup. Release date and launch pricing provide context for comparing GPU benchmark results with competing products from the same era. Understanding the product lifecycle helps evaluate whether the Radeon RX 6400 by AMD represents good value at current market prices. Predecessor and successor information aids in tracking generational improvements and planning future upgrades.
About AMD Radeon RX 6400
The AMD Radeon RX 6400 occupies a peculiar position in the GPU landscape: it is a modern architecture constrained by a narrow memory interface and a small frame buffer, yet its benchmark scores place it in a dead heat with much older, lower-tier hardware. The data shows an average benchmark score of 8,265, which positions the card at the 41st percentile of all GPUs. This is not a performance tier that suggests high-refresh or high-detail gaming; instead, it is firmly an entry-level part whose scores indicate it is best suited for light 1080p workloads. The card’s compute potential, as measured by Geekbench, shows 32,977 in OpenCL and 38,040 in Vulkan, which are respectable figures for its class but do not translate into strong rasterization performance, as evidenced by its PassMark G3D score of 7,673.
Benchmark Performance
The RX 6400’s most telling result is its PassMark DirectX 12 score of just 30, which is exceptionally low and highlights a severe weakness in modern API workloads. In contrast, its DirectX 11 score of 70 and DirectX 9 score of 93 are comparatively much stronger, suggesting the architecture performs better in legacy titles or lighter rendering paths. The DirectX 10 score of 54 sits between these extremes. This pattern indicates that while the card can handle older games reasonably well, it struggles significantly when pushed with contemporary DirectX 12 features and draw calls. The 3DMark Steel Nomad DX12 score of 176 reinforces this narrative—it is a minimal result that places the card far below any playable threshold for modern AAA titles at standard settings.
Comparing the RX 6400 to its nearest rivals by average score reveals a statistical tie rather than a clear victory. It matches the NVIDIA Quadro K1200 exactly at 8,265 points, with a 0% delta. Against the NVIDIA GeForce GTX 950M, the RX 6400 trails by just 0.3%, as the GTX 950M averages 8,289. Similarly, it is 0.7% behind the AMD Radeon RX 550, which scores 8,324. The only rival it beats is the NVIDIA GeForce 945M, where the RX 6400 leads by 2% (8,265 vs. 8,099). These deltas are within noise margins, meaning the RX 6400 does not outperform its immediate competition in any meaningful way. The PassMark G2D score of 722 is the only area where the card shows a clear strength, indicating solid 2D desktop performance, but this is irrelevant for gaming.
How It Compares
NVIDIA Quadro K1200: The RX 6400 and the K1200 are exact score twins at 8,265 average. However, the K1200 is a workstation card with a different driver focus, while the RX 6400 is a gaming-oriented product. In raw benchmark terms, there is no separation; the data shows a 0% delta. This means any real-world difference will come down to feature support, not fps.
NVIDIA GeForce GTX 950M: The GTX 950M edges out the RX 6400 by 0.3%. The 950M is a mobile GPU from an older generation, yet it still manages a slightly higher average score of 8,289. This is a damning comparison for the RX 6400, as a modern desktop card cannot decisively beat a several-year-old laptop part. The delta is negligible, but the fact that it is negative is notable.
AMD Radeon RX 550: The RX 550, a budget card from the previous architecture generation, leads the RX 6400 by 0.7% with an average of 8,324. This is a direct intra-company comparison, and the result indicates that the RX 6400’s architectural advancements are nullified by its limited memory bus and 4 GB VRAM. The performance is effectively identical, making the newer card’s launch seem incremental at best.
NVIDIA GeForce 945M: The RX 6400’s only win is against the 945M, where it holds a 2% advantage (8,265 vs. 8,099). Even this victory is modest, and the 945M is an even older mobile chip than the 950M. The data shows that the RX 6400 is not faster than its peer group; it is simply part of the same performance tier, which is a low bar.
Who Should Consider It
Benchmark results indicate the RX 6400 is suited for 1080p gaming at low to medium settings in e-sports titles or older games, where its DirectX 9 and DirectX 11 scores (93 and 70, respectively) can be utilized effectively. For modern DirectX 12 games, the score of 30 is a clear warning that performance will be poor, often below 30 fps at 1080p. Users with a 720p display or those who primarily play 2D or indie games may find it adequate, as the PassMark G2D score of 722 is strong. However, anyone targeting 1440p or high refresh rates should look elsewhere, as the 4 GB memory size and 128.0 GB/s bandwidth are insufficient for such demands. The card is also a candidate for basic multimedia PCs or HTPCs, given its single-slot design and lack of power connectors, but not for gaming beyond the lightest titles.
Power and Cooling
The RX 6400 has a TDP of just 53 W, making it one of the most power-efficient discrete GPUs available. AMD recommends a 250 W power supply, which is a very low requirement and compatible with most pre-built systems that lack extra PCIe power cables. The card requires no power connectors, drawing all its power from the PCIe slot. This simplifies installation and makes it an ideal drop-in upgrade for office desktops with weak power supplies. Thermally, the 53 W TDP can be managed by a single-slot cooler, and the card’s dimensions are not specified, but the design allows for compact builds. The process node is 6 nm at TSMC, with 5,400 million transistors on a 107 mm² die, contributing to the low power draw.
FAQ
Q: Does the RX 6400 require a power supply upgrade?
A: No, the card has a TDP of 53 W and requires no power connectors; AMD suggests a 250 W PSU, which is common in many office systems.
Q: Can the RX 6400 handle 4K video playback?
A: While the card has display outputs of 1x HDMI 2.1 and 1x DisplayPort 1.4a, its 4 GB VRAM and 128.0 GB/s bandwidth are not designed for 4K gaming; the benchmarks do not support 4K gaming viability, but video playback is not benchmarked.
Q: How does the RX 6400 compare to the RX 550?
A: The RX 6400 is 0.7% slower than the RX 550 in average benchmark score (8,265 vs. 8,324), making them effectively equal in performance.
Q: Is the RX 6400 good for DirectX 12 games?
A: No, its PassMark DirectX 12 score is 30, which is very low and indicates poor performance in modern API titles.
Q: What is the memory bandwidth of the RX 6400?
A: The card features 4 GB of GDDR6 memory on a 64-bit bus, providing 128.0 GB/s of bandwidth.
Q: Does the RX 6400 support ray tracing?
A: Yes, it has 12 ray tracing cores and supports DirectX 12 Ultimate (12_2), but its low compute performance limits ray tracing to very light use.
Memory Subsystem
The RX 6400 is equipped with 4 GB of GDDR6 memory on a 64-bit bus, yielding a bandwidth of 128.0 GB/s. This is a severe bottleneck, as modern games at 1080p often exceed 4 GB VRAM usage, leading to texture pop-in or stuttering. The 64-bit bus is half the width of typical entry-level cards, and the memory clock is 2000 MHz (16 Gbps effective). The pixel rate is 74.27 GPixel/s and the texture rate is 111.4 GTexel/s, which are low figures that align with its 32 ROPs and 48 TMUs. For high resolutions, this memory subsystem is inadequate; 1440p and 4K gaming will result in frame rates below playable levels. The card’s 768 shading units and FP32 performance of 3.565 TFLOPS further limit its ability to push high pixel counts. Data suggests the card is only viable for 1080p with reduced texture quality settings to stay within the VRAM limit.
Ray Tracing and Feature Set
The RX 6400 includes 12 ray tracing cores, part of the RDNA 2.0 architecture, and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. However, the hardware’s ray tracing capability is severely limited by its compute throughput of 3.565 TFLOPS FP32 and low memory bandwidth. Benchmark data does not include a dedicated ray tracing test, but the PassMark DirectX 12 score of 30 suggests that enabling ray tracing would result in unusable frame rates. The card also has no tensor cores (null), so it lacks any dedicated AI acceleration for DLSS-type features; AMD’s FSR would need to be used, but that relies on software. The FP16 performance is 7.130 TFLOPS (2:1 ratio), which can be used for some compute workloads but does not aid gaming. The card’s feature set is modern on paper, but the execution is too weak to make these features practical beyond basic effects at low resolutions.
Detailed benchmark scores and charts for the AMD Radeon RX 6400 are below.
Benchmark Scores
3dmark_3dmark_steel_nomad_dx12Source
3DMark Steel Nomad is the latest GPU benchmark running at native 4K with DirectX 12. It's roughly 3x more demanding than Time Spy, testing AMD Radeon RX 6400 with cutting-edge rendering techniques. The benchmark uses state-of-the-art graphics technologies to stress modern hardware. Scores accurately predict AMD Radeon RX 6400 performance in demanding AAA games at 4K resolution.
Top 5 Performers
Top 5 PerformersNearby Performers
Nearby Performersgeekbench_openclSource
Geekbench OpenCL tests GPU compute performance using the cross-platform OpenCL API. This shows how AMD Radeon RX 6400 handles parallel computing tasks like video encoding and scientific simulations. OpenCL is widely supported across different GPU vendors and platforms. Higher scores benefit applications that leverage GPU acceleration for non-graphics workloads.
Top 5 Performers
Nearby Performers
geekbench_vulkanSource
Geekbench Vulkan tests GPU compute using the modern low-overhead Vulkan API. This shows how AMD Radeon RX 6400 performs with next-generation graphics and compute workloads.
Top 5 Performers
Nearby Performers
passmark_directx_10Source
DirectX 10 tests AMD Radeon RX 6400 with the graphics API introduced with Windows Vista. This shows performance in games from the 2007-2009 era that targeted this feature level. DX10 introduced geometry shaders and other features still used today.
Top 5 Performers
Nearby Performers
passmark_directx_11Source
DirectX 11 tests AMD Radeon RX 6400 with the widely-used graphics API powering most current games. This shows mainstream gaming performance across the majority of today's titles. DX11 remains the most common rendering path even in newer games. Tessellation and compute shaders introduced in DX11 are heavily used in modern game engines.
Top 5 Performers
Nearby Performers
passmark_directx_12Source
DirectX 12 tests AMD Radeon RX 6400 with the modern low-overhead graphics API. This shows performance in next-gen games that leverage DX12 features like ray tracing and mesh shaders.
Top 5 Performers
Nearby Performers
passmark_directx_9Source
DirectX 9 tests AMD Radeon RX 6400 performance with the legacy graphics API still used by older games. This shows compatibility and performance with classic titles from the 2000s era.
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passmark_g2dSource
PassMark G2D tests 2D graphics performance for desktop rendering, UI elements, and productivity applications. This shows how AMD Radeon RX 6400 handles everyday visual tasks.
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passmark_g3dSource
PassMark G3D measures overall 3D graphics performance of AMD Radeon RX 6400 across DirectX 9 through 12 tests. This provides a comprehensive gaming capability score. The combined result predicts performance across various game engines and API versions.
Top 5 Performers
Nearby Performers
passmark_gpu_computeSource
GPU compute tests parallel processing capability of AMD Radeon RX 6400 using OpenCL. This shows performance in video encoding, scientific computing, and AI workloads.
Top 5 Performers
Nearby Performers
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