Glad to hear your new card is working Matt.
Care to share how to do the undervolting and the best way to validate the result?
how are you measuring if your voltage changes are taking effect Matt? I'm not seeing any change on the wattage measure socket thing I've got plugged into the wall. With a 100mv drop sould be seeing 100 watts difference or so so it should be blatantly obvious. I don't even think my volt changes are taking any sort of effect.
In the driver available on the website, voltage control is not working, but I'm using a slightly newer build in which it works. No ETA on its arrival I'm afraid, but it will come.
I'm uploading a BF4 video where i give it a quick run out with the undervolt in place. I'll share that with you once it's uploaded. As it's 4K @60FPS file size is 2.2GB so may take an hour or more.
Here's some quick HWINFO64 stats while it's uploading.
Stock settings (1750Mhz/945Mhz) +50% PL
Undervolted -0.075mv (1750Mhz/945Mhz) +50% PL
The 0.075mv undervolt allows for about a 10% reduction in required fan speed to maintain 65C. 30-35% fan speed is required and that is silent for me.