Originally Posted by Bartouille
There is no official "max voltage". Actually yea there is, it's stock voltage lol
You are not going to get anything out of more than 200mv, maybe even +100mv (speaking about 24/7 oc).
Thanks for the pointers. I am starting to get odd throttling happening at 1150 mhz core w +100mv or 1175 mhz core with +75mv. GPU temp is 70 deg C, In GPU-Z I am seeing VDDC Power [W] jump above 150w and VDDC Current [A] will be from 120-140 then the core speed will drop to 600mhz or so.
Is there a hard limit I am hitting for power draw or is this a cooling issue? I cannot see VRM temps, the VRMs have a heatsink and I have a fan blowing over it.
Originally Posted by ducegt
What are your clocks at with +100mv and what voltage are you actually seeing with gpu-z? I did some tests with cooling better than water and I pushed to 1.35v for 1225 to 1250mhz. I only gained 500 3dmark firestrike graphics points compared to 1150 on the core with 1.2v and normal room temperature cooling. My 285 is flashed as a 380x so I actually don't over volt with software at all.
sorry missed this.
with +100mv I have not determined what the wall is as I get the stuttering mentioned before. Seeing 1.2-1.225 volts.
my stable oc of 1150 with +50mv moves from 1.175 to 1.21Edited by Gruelius - 5/21/16 at 7:05pm