I7 14700k and one 8-pin ATX 12V power connector.

[Clarence Boddicker]

Ive just built a pc using an i7 14700k cpu. The motherboard only has one 8-pin ATX 12V power connector. I keep reading conflicting info on how many watts one 8 pin psu to cpu cable can supply. Some people say 250w others say over 300w, up to 384w. Some people say only the same as the pcie cable, 150w.

Can anyone confirm a number and if one 8 pin connector is enough for the 14700. Apparently it can pull well over 300w so im getting a bit worried im going to have to change the motherboard.

 

[Clarence Boddicker]

Which motherboard?

Its a Gigabyte b760 Gaming x ax.

 

[Clarence Boddicker]

The ATX standard used to recommend that power for that cable be on its own rail, but that was removed in ATX12v v2.3 and the reality is most power supplies only have a single rail, or 2-3 at most and that cable will be supplied on a rail which also supplies something else. The issue there being that it will be a rail with often vastly more current available, and the power supply doesnt care what that connector is rated for.

The biggest risk isnt instability, it's overloading that socket, causing damage and possible fire. Gamer's nexus tested the 14700k and theirs drew 284w from the eps12v rail which is more than the 8 pin socket is rated for. Undervolting is something i would look at regardless, but again i'd be ware of using that cpu and board combo.

These comments on reddit are what worried me.