+135MHz to core is the maximum allowed without vBIOS changes.
Memory is limited to +5000MHz, I think, but that's impossbile to achieve anyways.
If you're seeing artifacts at +350 to memory then you probably just got unlucky with your particular one.
Try +300. I run my 980M at +324MHz based on a hunch on the base memory clock being 324MHz, like the core base clock being 135MHz.
Probably has nothing to do with how it works, but hey, I like the number lol
Don't be too worried about it, though. Number of cores is what mainly affects performance, not so much clock speeds.
No, but seriously, bad luck, people have reported doing stable +500 without any modifications with just MSI Afterburner.
