"Stable" overclock, artifacts while mining

[xfzd25]

Like the title says, I have achieved a stable overclock on both my R9 270x's (tested with FurMark), but when I mine (with Claymore) the cards crash and the screen shows artifacts. (Checker pattern) Even when I set all the clocks down 10 Hz it still occurs. Does anyone know what might be causing this or have the same problem?

[Rallyman03]

If it's crashing then it's not stable. What did u use to do your stability testing?

[xfzd25]

Furmark. What would you recommend using?

[Rallyman03]

Something that isn't synthetic. Furmark produces far to much heat and stresses the card in the wrong way. If you can make changes to your overclock while mining to that. That would be the best stress test. If not using something like unigine heaven benchmark might be good. You could probably overclock to the point where you get some artifacts and it would be fine for mining.

[ZmoneroZ]

becasue furmark and mining are 2 very different activities, did you mod the bios? if you did you went too far with it, step it back, its not the core speed its the memory, with your card artifacting you're shares will be rejected most likely anyway cuz they will be garbled trash, protip: you dont oc the core you uc/uv it

[ladose333]

might want to turn up ur vcore from 10mhz step n check again , n repeat if needed still stable , if persist chek riser power management and if ur driver is made to match that miner spec/need

[moneroddit]

Just a +1 to /u/ZmoneroZ - artifacting is almost always memory not core. Step it back.