Arc B390 vs Radeon RX 550X
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 650 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 8.72 | no data |
| Architecture | GCN 4.0 (2016−2020) | Xe3-LPG (2026) |
| GPU code name | Lexa | Panther Lake |
| Market segment | Desktop | Laptop |
| Release date | 16 December 2018 (7 years ago) | 27 January 2026 (less than a year ago) |
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 | 512 | 1536 |
| Core clock speed | 1100 MHz | 300 MHz |
| Boost clock speed | 1183 MHz | 2500 MHz |
| Number of transistors | 2,200 million | no data |
| Manufacturing process technology | 14 nm | 3 nm |
| Power consumption (TDP) | 50 Watt | 80 Watt |
| Texture fill rate | 37.86 | 120.0 |
| Floating-point processing power | 1.211 TFLOPS | 7.68 TFLOPS |
| ROPs | 16 | 24 |
| TMUs | 32 | 48 |
| Ray Tracing Cores | no data | 12 |
| L1 Cache | 128 KB | 768 KB |
| L2 Cache | 512 KB | 16 MB |
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 x8 | IGP |
| Length | 145 mm | no data |
| Width | 2-slot | no data |
| Supplementary power connectors | None | 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 | System Shared |
| Maximum RAM amount | 4 GB | System Shared |
| Memory bus width | 128 Bit | System Shared |
| Memory clock speed | 1500 MHz | System Shared |
| Memory bandwidth | 96 GB/s | no data |
| Shared memory | - | + |
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 | 1x DVI, 1x HDMI, 1x DisplayPort | Portable Device Dependent |
| HDMI | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_0) | 12 Ultimate (12_2) |
| Shader Model | 6.4 | 6.9 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 3.0 |
| Vulkan | 1.2.131 | 1.4 |
Synthetic benchmarks
Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.
Passmark
This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.
Pros & cons summary
| Recency | 16 December 2018 | 27 January 2026 |
| Chip lithography | 14 nm | 3 nm |
| Power consumption (TDP) | 50 Watt | 80 Watt |
RX 550X has 60% lower power consumption.
Arc B390, on the other hand, has an age advantage of 7 years, and a 366.7% more advanced lithography process.
We couldn't decide between Radeon RX 550X and Arc B390. We've got no test results to judge.
Be aware that Radeon RX 550X is a desktop graphics card while Arc B390 is a notebook one.
Other comparisons
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
