I have a 560 rig with windows 10 updated, if I switch to cryptonight and then back to ethash sometimes it will not work even after a reboot, I need to fully power off the rig and cold boot.
You also might have a card(s) with the mem clock too high, trying downing them by 10 mhz at a time.
Claymore 11.7 seems to be a tad more sensitive to overclocks.
Claymore 11.7 seems to be a tad more sensitive to overclocks.
To be clear, claymore does no such thing!
All claymore is doing is "sending" the clock value YOU specify, that is all, nothing else.
If it fails, your clock setting is wrong, or you're working too close to the limit of your hardware.
What has changed/improved over time in Claymore is ability to leverage more from the hardware, so if you're cutting it too fine, or dual mining, you might tip it over the edge.
But regardless, claymore has no such "sensitivity", it simply does what you ask of it, and you need to ensure that is rational for your rig/hadware.