I try even that..so for now ..if i put setup on 5700xt 1400mhz and 750mV..gpu dont want even to start mining..i try 1400mhz 850mV works for almost 24h..now i put 975mV..and see what happends...and overclock is stock..didnt want to touch ..
are u mining in windows or a mining OS?
1400 is high for TRM in the default b config
the devs say if u push memory and core to max in b config it can use more power than normal
i run all my 5700/xt at
1320Mhz 750-760mV core
895-900Mhz at 775-800mV mem (samsung needs at least 780 i think) (micron can work down to 760 but i had problems)
going to 805-810mV on memory can help stability, even with higher clocks of course
micron memory can overclock high than samsung from what i noticed and others have shown while actually mining
but all my cards run mostly stable around 900Mhz on memory
anytime i push anything above 905-910Mhz on mem i get reboots
memory temperature is huge for 2 reasons
main reason is a run away temp on memory will crash card
so u have to make sure ur fans are cooling the memory before it goes above 98C
2nd is memory will degrade with 24 hour operation above certain temps
micron will degrade above 94C with 24 hour operation
samsung will degrade above 86C with 24 hour operation
if ur mining in windows u will prolly just need to set ur fans to 75% depending on specific GPU
hiveOS and a lot of other mining OS give an option to cool the card based on memory temp instead of gpu temp