that's the thing though I keep everything pretty clean...about 3 cans of air per month's worth. I haven't pulled the card in a long time so possibly there's some gunk hiding where the air-blasts can't reach it.
I'll pull the card and give it a real good clean, see if that makes a difference.
thanks for your reply F -
It may also be time to replace the TIM between the chip and heatsink. If you're going to give it a thorough cleaning, take the time to reapply new thermal paste of your choice.
Dead Man Walking: i5 6600K, 16 gigs RAM, Radeon RX 480, Windows 10 Pro x64
Endpoint: Ryzen 7 1700, 16 gigs DDR4-2400, Radeon RX 480, Win10 Pro x64 / Xubuntu 17.04
HTPC: i3 4170, 8 gigs RAM, Geforce GTX 1050 Ti, Windows 8.1 x64