1. Optical Disk Drive (optional)
2. Power button with diagnostic LED
3. Hard-drive activity light
4. Universal audio jack
5. Two USB 2.0 ports
6. Two dummy slots
1. Re-tasking Line out/Line in audio port
2. Two DisplayPort 1.4
3. Serial/PS2 slot (optional)
4. Four USB 3.2 Gen 1 Type-A ports
5. Two USB 2.0 ports with Smart Power on
6. Three expansion card slots
7. Power connector port
8. Power-supply diagnostic light
9. Knock-out slot (optional SMA connector)
10. Kensington security-cable slot
11. RJ-45 Ethernet port
12. Service tag
13. Padlock loop
14. 3rd Video Port (VGA/DP 1.4/HDMI 2.0b) (optional)
Service Tag
The service tag is a unique alphanumeric identifier that allows Dell service technicians to identify the hardware components in
your computer and access warranty information.
Description Values
Height:
Front height 324.30 mm ( 12.77 in.)
Rear height 324.30 mm (12.77 in.)
Width 154.00 mm (6.06 in.)
Depth 292.20 mm (11.50 in.)
Weight
NOTE: The weight of your computer depends on the
configuration ordered and manufacturing variability.
1. Minimum: 5.35 kg (11.79 lb)
2. Maximum: 6.50 kg (14.33 lb)
Operating system
Your OptiPlex 3090 Tower supports the following operating systems:
● Windows 10 Enterprise LTSC, 64-bit
● Windows 11 Pro, 64-bit
● Windows 11 Downgrade (Windows 10 image)
● Windows 11 Home, 64-bit
● Windows 11 Pro Education, 64-bit
● Kylin Linux Desktop version 10.1 (China only)
● Ubuntu Linux 20.04 LTS, 64-bit
● Windows 10 CMIT Government Edition, 64-bit (China only)
Memory
The following table lists the memory specifications of your OptiPlex 3090 Tower .
Table 5. Memory specifications
Description Values
Memory slots Two DIMM slots
Memory type DDR4
Memory speed 2666 MHz
Maximum memory configuration 64 GB
Minimum memory configuration 4 GB
Memory size per slot 4 GB, 8GB, 16 GB, 32 GB
Memory configurations supported ● 4 GB, 1 x 8 GB, DDR4, 2666 MHz, non-ECC
● 8 GB, 1 x 8 GB, DDR4, 2666 MHz, non-ECC
● 8 GB, 2 x 4 GB, DDR4, 2666 MHz, non-ECC, dual-channel
● 16 GB, 1 x 16 GB, DDR4, 2666 MHz, non-ECC
● 16 GB, 2 x 8 GB, DDR4, 2666 MHz, non-ECC, dualchannel
● 32 GB, 1 x 32 GB, DDR4, 2666 MHz, non-ECC
● 32 GB, 2 x 16 GB, DDR4, 2666 MHz, non-ECC, dualchannel
● 64 GB, 2 x 32 GB, DDR4, 2666 MHz, non-ECC, dualchannel
NOTE: Memory speed varies by different type of DPC
(DIMM per Channel) installation.
Memory configuration matrix
Table 6. Memory configuration matrix
Configuration
Slot
DIMM1 DIMM2
4 GB DDR4 4 GB
8 GB DDR4 4 GB 4 GB
8 GB DDR4 8 GB
16 GB DDR4 8 GB 8 GB
16 GB DDR4 16 GB
32 GB DDR4 16 GB 16 GB
32 GB DDR4 32 GB
64 GB DDR4 32 GB 32 GB
External ports
The following table lists the external ports of your OptiPlex 3090 Tower .
Table 7. External ports
Description Values
Network port One RJ-45 Ethernet port 10/100/1000 Mbps
USB ports ● Two USB 2.0 port (front)
● Four USB 3.2 Gen 1 ports (rear)
● Two USB 2.0 ports with SmartPower on (rear)
Audio port ● One Universal Audio Jack port (front)
● One Re-tasking Line-out/Line-in audio port (rear)
Video port ● Two DisplayPort 1.4 ports (rear)
● One 3rd Video Port (VGA/DP 1.4/HDMI 2.0b) (rear,
optional)
NOTE: Download and install the latest Intel Graphics
driver from www.dell.com/support to enable multiple
displays.
Media-card reader Not supported
Power-adapter port Not supported
Security-cable slot ● One Kensington lock slot
● One Padlock ring
Model number Qualcomm QCA61x4A
(DW1820)
Intel AX201 Intel 9462
Transfer rate 867 Mbps 2400 Mbps 433 Mbps
Frequency bands supported 2.4 GHz/5 GHz 2.4 GHz/5 GHz 2.4 GHz/5 GHz
Wireless standards ● WiFi 802.11a/b/g
● Wi-Fi 4 (WiFi 802.11n)
● Wi-Fi 5 (WiFi 802.11ac)
● WiFi 802.11a/b/g
● Wi-Fi 4 (WiFi 802.11n)
● Wi-Fi 5 (WiFi 802.11ac)
● Wi-Fi 6 (WiFi 802.11ax)
● WiFi 802.11a/b/g
● Wi-Fi 4 (WiFi 802.11n)
● Wi-Fi 5 (WiFi 802.11ac)
Encryption ● 64-bit/128-bit WEP ● 64-bit/128-bit WEP ● 64-bit/128-bit WEP
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