I am using a single monitor. the clock speed is:
the resolution is:
1920 x 1080 which is the recommended setting with my monitor
and the refresh rate:
this is just the basic setting that is being used on my monitor.
Alot depends on the ambient temps as well...the part of the world I live in is much hotter in August (90's F) than in February (50's F). Can you take off the side of the case to allow more air to circulate...just as a troubleshooting step? Have you blown out the dust from around the graphics card vents?
My R9 290 runs around 45c.