Jump to content
Corsair Community

AX860i weird voltage drop during heavy load

Recommended Posts

Hey guys ,


I have a AX860i since 2013 now , but there is a weird voltage drop when there i don't know how to interpret this but i'll post a picture for you to see :



I was running ROG furmark at the same time , so the 12V at the PSU level seems to be stable but when you are looking at GPU + 12V on aida64 Extreme , it drops down to a really low level , here 11.188V way below the ATX voltages tolerances specs that should be no more than 5% meaning 11.4 to 12.6 V.


So my question is what's wrong with that low voltage ? does this mean that the PSU is struggling to provide a stable 12V at the PCIe connector level ? What does this value means on Aida64 ?


Thanks !

Link to comment
Share on other sites



Yes i use some PCIe extension cables for the 8 and 6 pins , they measure 45 cm in length, they are BitFenix Alchemy Black and red , do you think they can cause some drops like this ?




My Ax860i is set on multirail mode rail right ? If you are looking at Aida64 extreme , the GPU vrm's are consuming 65A way more than the 40A than corsair link is actually showing at the screen if the PSU is in multi rail mode . Should i give a try in single rail mode and remove the PCIe extensions cable ? how do i set the PSU in single rail mode ?

Edited by Nonanche92000
Link to comment
Share on other sites

try connecting the GPU without extensions and see what the drop is, if there's any.

My experience of extensions.. i used two sets.

The first one dropped the GPU voltage to 11.6V under load, the second 11.8V. Still in spec but using the PSU cables or cablemod cables (not extensions) i got 12.2V..

A colleague i gave my first extensions had even worse result at 11.4V. he removed them.


It's worth trying without them.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...