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Rectangular silver metal power supply unit with rear fan grille and side label

DELL

DELL YK840 275 W power supply for OptiPlex 740 745 755 SFF

SKU CH-PTXZ-WS9YR

275 watt power supply fits Dell OptiPlex 740, 745 and 755 small-form-factor desktops

  • 275 W output powers OptiPlex SFF systems reliably
  • Direct fit for OptiPlex 740 745 755 small form factor
  • New Dell YK840 unit ensures OEM compatibility
  • 275 watt capacity supports standard desktop components

Direct replacement for OptiPlex SFF

This 275 watt power supply is built for Dell OptiPlex 740 745 755 small form factor desktops. It restores factory power delivery when the original unit fails or ages. Buyers who need higher wattage or a different form factor cannot use this part.

Proprietary SFF connector layout

The unit uses the Dell specific pinout and mounting tabs required by the OptiPlex SFF chassis. Standard ATX cables will not connect and the bracket will not align with other cases. Installers must verify the exact model number before fitting.

How it compares

Measured against everything we stock in Server & Hot-Plug PSUs, at today’s prices. Recalculated every night.

Price $66.99
Cheaper than about 81% of the 3,798 comparable items (median $131.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What wattage does the Dell YK840 supply to OptiPlex 740, 745 or 755 SFF systems?

The Dell YK840 delivers 275 W of power and is built for OptiPlex 740, 745 and 755 small-form-factor desktops.

Will this power supply fit the SFF chassis of an OptiPlex 740, 745 or 755?

Yes, the YK840 is designed for the small-form-factor cases of the OptiPlex 740, 745 and 755 models.

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