Asus recently announced an offering for miniPCs, this round they're based on AMD Ryzen 4000-U Series processors. Mostly used in Ultra portables the 15 Watt SoC can also be used to power up mini PC. 

ASUS didn't price these rather competitively, but we'll have to wait and see how the market responds. Then again, there's isn't mich competion on this product series, and that translates into pricing.

ASUS PN50 specifications:

• SoC (one or the other)
  • AMD Ryzen 7 4800U 8C/16T processor up to 1.8 / 4.2 GHz with 8-core
    Radeon Graphics; 12MB L2/L3 cache
  • AMD Ryzen 7 4700U 8C/8T processor up to 2.0 / 4.1 GHz with 7-core
    Radeon Graphics; 12MB L2/L3 cache
  • AMD Ryzen 5 4600U 6C/12T processor up to 2.1 / 4.0 GHz with 6-core
    Radeon Graphics; 11MB L2/L3 cache
  • AMD Ryzen 5 4500U 6C/6T processor up to 2.3 / 4.0 GHz with 6-core
    Radeon Graphics; 11MB L2/L3 cache
  • AMD Ryzen 3 4300U 4C/4T processor up to 2.7 / 3.7 GHz with 5-core
    Radeon Graphics; 6MB L2/L3 cache
• System Memory – 2x DDR4 SO-DIMM up to 64GB RAM
• Storage – M.2 socket for SSD, 2.5″ drive bay for HDD or SSD, MicroSD card socket
• Video Output – 1x HDMI 2.0 and 1x DisplayPort 1.4
• Audio – 3.5mm headphone jack, digital audio output via HDMI port
• Connectivity – Gigabit Ethernet (RJ45), WiFi 6 and Bluetooth 5 via Intel AX200 M.2 card
• USB – 3x USB 3.0/3.1 ports, 2x USB 3.1 Gen2 USB-C ports with DisplayPort Alt mode support
• Misc – Power button, IR receiver, and HDD LED
• Power Supply – TBD
• Dimensions – 115 x 115 x 49 mm
• Weight – 0.7 kg

As usual with barebones, you have to supply memory, storage and operating system. Several prices have leaked online:

• Ryzen 3 4300U model – $327 ex. VAT
• Ryzen 5 4500U model – $336 ex VAT
• Ryzen 7 4700U model – $388 ex VAT
• Ryzen 7 4800U model – $508 ex VAT