Radeon RX 6400 vs R9 280X2
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 320 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 45.67 |
| Power efficiency | no data | 26.42 |
| Architecture | GCN 1.0 (2012−2020) | RDNA 2.0 (2020−2025) |
| GPU code name | Tahiti | Navi 24 |
| Market segment | Desktop | Desktop |
| Release date | no data | 19 January 2022 (3 years ago) |
| Launch price (MSRP) | no data | $159 |
Cost-effectiveness evaluation
The higher the performance-to-price ratio, the better. We use the manufacturer's recommended prices for comparison.
Performance to price scatter graph
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 2048 ×2 | 768 |
| Core clock speed | 950 MHz | 1923 MHz |
| Boost clock speed | 1000 MHz | 2321 MHz |
| Number of transistors | 4,313 million | 5,400 million |
| Manufacturing process technology | 28 nm | 6 nm |
| Power consumption (TDP) | 375 Watt | 53 Watt |
| Texture fill rate | 128.0 ×2 | 111.4 |
| Floating-point processing power | 4.096 TFLOPS ×2 | 3.565 TFLOPS |
| ROPs | 32 ×2 | 32 |
| TMUs | 128 ×2 | 48 |
| Ray Tracing Cores | no data | 12 |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 3.0 x16 | PCIe 4.0 x4 |
| Length | 315 mm | no data |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | 3x 8-pin | None |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR5 | GDDR6 |
| Maximum RAM amount | 3 GB ×2 | 4 GB |
| Memory bus width | 384 Bit ×2 | 64 Bit |
| Memory clock speed | 1500 MHz | 2000 MHz |
| Memory bandwidth | 288.0 GB/s ×2 | 128.0 GB/s |
| Resizable BAR | - | + |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | 6x mini-DisplayPort 1.2 | 1x HDMI 2.1, 1x DisplayPort 1.4a |
| HDMI | - | + |
API and SDK compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_1) | 12 Ultimate (12_2) |
| Shader Model | 6.5 (5.1) | 6.7 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 (1.2) | 2.2 |
| Vulkan | 1.2.170 | 1.3 |
Pros & cons summary
| Maximum RAM amount | 3 GB | 4 GB |
| Chip lithography | 28 nm | 6 nm |
| Power consumption (TDP) | 375 Watt | 53 Watt |
RX 6400 has a 33.3% higher maximum VRAM amount, a 366.7% more advanced lithography process, and 607.5% lower power consumption.
We couldn't decide between Radeon R9 280X2 and Radeon RX 6400. We've got no test results to judge.
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