MINISFORUM BD790i Mini ITX Motherboard with integrated AMD Ryzen 9 7945HX ( 16 Cores / Zen4 / PCI-e 5.0 )Amazon EU

A brilliant price for this set-up with a 16 core Zen4 laptop CPU Uses DDR5 SODIMMs and has PCI-e 5.0 too.
Reviews
Minisforum BD790iX3D 7945HX3D vs 7945HX 16-Core ITX Battle(Tek Syndicate)
The New BD790i Is 16 Core Mini ITX Board We Built A Powerful Small Foot Print PC(ETA PRIME)
Key Features
Powerful ProcessorPowered by AMD Ryzen 9 7945HX processor, 16 cores and 32 threads (64MB cache, up to 5.4GHz), AMD Radeon 610M, 5nm TSMC manufacturing, based on Zen 4 architecture, this processor provides fast response time for multithreaded
Advanced Cooling System The BD790i has a custom cooling solution specifically for mobile chips, as well as a custom CPU cooler and an active SSD cooler. It is reliable and safe and can operate at high speeds for long periods of time. The maximum power consumption of 85W ensures optimal performance (12cm fan not included).
Full ConnectivityThe BD790i is equipped with three video output ports: HDMI, DisplayPort and USB-C. Up to three monitors can be connected simultaneously (up to 8K 60Hz). This allows seamless multitasking to increase productivity. Plus, it has four USB-A ports and one 2.5G RJ45 port to make everyday tasks easier.
Dual PCIe 5.0 M.2 & DDR5 BD790i ITX motherboard has two M.2 2280 PCIe 5.0 SSD slots and offers ultra-fast data access speeds. Dual channel 5200MHz DDR5 memory can be expanded up to 96GB for lower latency and higher memory bandwidth.
PCIe 5.0 x16 The BD790i motherboard is equipped with a PCIe 5.0 x16 graphics card slot, which fully exploits the potential of high-performance components. Ideal for various applications requiring a powerful graphics card. (Compatible with Nvidia RTX 4090/AMD RX 7900 XTX)
The product page is here.