Bitcoin Forum

Currently, I am hashing at around 33mh/s at the following settings +13mv, +10PL, 1180Mhz Core Clock and 1500Mhz Memory Clock with temperatures not exceeding 75 celsius on all my GPUs (Open Rig... Oh and the last GPU3 value is for a regular 390 without x)
https://s32.postimg.org/xja8i5ssl/Screen_Shot_2016_06_16_at_1_57_24_PM.png

My questions:
1) What are the best OC settings for R9 390x for the maximum Hashrate? (I own Sapphire and ASUS GPUs and heard that they can get up to 35MH/s)
2) Does OC decrease the lifetime of the card? If yes, does it have a really big impact on its lifetime?
3) How long is the lifetime of a regular GPU mining 24/7 with good ventilation, regular fan oiling and dust cleaning :D

If the temperature is fine, GPU and more important VRM temp life of the card is not declined... only problem can be bad quality of fan which will fail after few years of hard work

And by "Temperature is Fine", what range are you referring to... Is 70-80 celsius fine for 24/7 non stop mining without turning off the computer for months or even years?

70 to 80 degree is OK for long term mining. It is better to keep the temperature constant. High-low-high temperature cycle will make the solder loose.

yes it is, but look at VRM temp (GPU-z can show that), sometimes GPU can be 80C and VRM 110C which is not good, depending on a card design, but ETH is low usage algo, other coins are more demanding