Quick overview from the supplier:
Dell Optiplex 3090 MFF Black (Core i5-10500T 2.3-3.8 GHz, 8GB RAM, 256GB SSD, WiFi, Ubuntu)
Product Family : Dell Optiplex 3090
Case Form Factor: MFF
CPU : Intel Core i5-10500T (6C / 12T, 2.3-3.8GHz, 12MB)
RAM : 1x 8GB DIMM DDR4-2400 (two 288-pin DIMM sockets)
HDD : 256GB SSD M.2 PCIe NVMe
Card Reader no
Optical drive No
Graphics : Integrated Intel UHD Graphics 630
WLAN : Intel Wi-Fi 6 AX201 2x2 + Bluetooth 5
5 x USB3.2 Gen 1
2 x DP
1Gb LAN (RJ-45)
1 Universal Audio Jack (front)
1 Line-out audio port (front, retaksable)
Keyboard : Dell KB216 Multimedia USB Keyboard
Mouse : USB Dell MS116, Black
PSU 65 watts
Ubuntu
Maincase : Black