Lenovo Finn-1 Planar Mainboard i5-8250U KBL 5B21U33472

Laptop system board with integrated Intel Core i5-8250U processor, delivering reliable performance for everyday computing. This board is a direct replacement for select Lenovo IdeaPad 330S models, restoring full functionality with its 8th generation Kaby Lake Refresh CPU and Intel UHD Graphics 620.

Advantages

Integrated quad-core processor with 8 threads handles multitasking smoothly. Supports up to 20GB of DDR4 memory via one SODIMM slot plus soldered RAM. Offers both M.2 NVMe and SATA III storage options for flexible configurations. Includes essential internal connectors for keyboard, touchpad, display, speakers, battery, fan, and Wi-Fi module.

Suitable for

• Lenovo IdeaPad 330S-15IKB laptops
• Select Lenovo IdeaPad 330S-14IKB variants
• Technicians performing board-level repairs
• System builders needing a compact, power-efficient platform

Key specifications

• Processor: Intel Core i5-8250U (4 cores, 8 threads, 1.6 GHz base, 3.4 GHz turbo)
• Graphics: Intel UHD Graphics 620
• Memory: DDR4, 1 SODIMM slot, max 20GB
• Storage: 1x M.2 NVMe PCIe slot, 1x SATA III connector
• External ports: USB 3.0, USB 2.0, USB-C, HDMI, audio jack, power jack
• FRU: 5B21U33472

Recommendations

Verify exact model compatibility before installation. Handle with anti-static precautions. Pair with a compatible DDR4 SODIMM and M.2 SSD for optimal performance.