Hello, sorry if i'm writing my reply so late, i tried a lot of thermal pads to solve this problem, let's start answering:
@FJC and BPD:
GPU#1 is the Core
GPU#2 is MEMio
GPU#3 is arnyalo
VDDC #1,2 and 3 are the VRM "in line"
i can say this because Everest shows me the name of the sensor, so i compared the temps.
as i wrote, the small VRM reaches over 70Â° while playing and my system crashes @~95Â°, i tried with furmark extreme test with max AA.
after removing the original pad i used an adesive Akasa thermal pad between the VRM and the original Sapphire plate and it lower it's temps of ~10Â°, but it still reaches 80Â° during benchs.
i'm sure if i use a little cooler like your i'm going to burn it, but i'll try when i come back home
months ago a bug of MSI After Burner increased my VRM voltage to 1.6 for a week, did it damage the small VRM?
is the same problem of the old 4870 LINK
An user of another forum has the same issue that i solved by half, using a VRM-R4 for VDDC#1,2,3, but GPU#2 and 3 are still high... LINK