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Rectangular metal power supply unit with printed labels and connector ports

myVolts

myVolts 300W Power Supply for iMac A1419 27" 2012-2017

SKU CH-RQ1T-2VQTM

A 300 W replacement power supply for 27‑inch iMac A1419 models from 2012 to 2017

  • TypeAT
  • Restores full power to your iMac with a genuine 300 W Apple PSU
  • Fits every 27″ A1419 model from 2012 through 2017
  • Wide 100 V–240 V input handles any mains supply worldwide
  • Delivers 25 A on the main +12 V rail for stable heavy loads
  • Original LITEON PA-1311-2A unit matches Apple part 661-7170 exactly

Replacement PSU for iMac A1419 27

This 300W power supply replaces the original unit in iMac A1419 27-inch models from 2012 through 2017. It matches Apple part numbers PA-1311-2A and 661-7170. The board fits Late 2012, Late 2013, Retina 5K Late 2014, Mid 2015 and Mid 2017 configurations. It restores power to systems that will not start due to a failed supply.

Thermals noise and 300W delivery

The unit accepts 100V to 240V input at 50 or 60Hz and draws up to 4A. It provides a +12Vs5 rail rated at 25A and a +12Vs 5 DC rail at 5A. As an OEM pull the board may show light scuffs from storage but operates within the original thermal design. No additional cooling or fan changes are required.

OEM board with original connectors

The supply uses the factory connector layout so it plugs directly into the iMac logic board and power button assembly. Mounting holes align with the chassis standoffs for a secure fit. Because it is a used OEM part, buyers who need a brand-new retail unit or a higher wattage design should look elsewhere.

Highlights

  • Restores full power to your iMac with a genuine 300 W Apple PSU
  • Fits every 27″ A1419 model from 2012 through 2017
  • Wide 100 V–240 V input handles any mains supply worldwide
  • Delivers 25 A on the main +12 V rail for stable heavy loads
  • Original LITEON PA-1311-2A unit matches Apple part 661-7170 exactly

Specifications

TypeAT

Questions about this item

How do I install the myVolts 300W PSU into my iMac A1419, and which step catches people out?

Remove the screen and logic board to reach the PSU; the step most miss is reconnecting the 12 V sense cable (printed PA-1311-2A) before reassembly.

What maintenance or replacement will this 300W unit need later?

The internal fan bearings and electrolytic capacitors age first; plan a capacitor refresh or fan swap after several years of continuous 25 A load.

Under sustained use, which limit of this 300W supply appears first?

The +12 V rail is rated 25 A; prolonged draws near that level hit thermal protection before the 300 W label is reached.

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