Dell OptiPlex 7420 - Add-In Card Dimensions; Slot Limitations

Table 22. Physical system dimensions(continued)
Feature Values
Shipping weight (including packaging materials) 12.04 kg (26.54 lb)
Packaging parameters with height adjustable stand
Height
● ROW: 798 mm (31.42 in.)
● DAO: 833 mm (32.80 in.)
Width 495 mm (19.49 in.)
Depth 193 mm (7.60 in.)
Shipping weight (including packaging materials) 12.96 kg (28.57 lb)
Add-in card dimensions
Slot limitations
The following table lists the system board connector maximum add-in card allowable dimensions of your OptiPlex All-in-One
7420.
Table 23. M.2 2230 slot for Wi-Fi card 
Voltage 3.3 V
Width 0.86 in. (22 mm)
Length 1.18 in. (30 mm)
Thickness 0.14 in. (3.65 mm)
Maximum wattage 6.6 W
Table 24. M.2 2230/2280 slot for solid-state drive
Voltage 3.3 V
Width 0.86 in. (22 mm)
Length
● 2230: 1.18 in. (30 mm)
● 2280: 3.15 in. (80 mm)
Thickness 0.14 in. (3.65 mm)
Maximum Wattage 8.25 W
28 Engineering specifications