Well, I don't think it's the memory. I've tried 1:1 for lower frequencies, and the same thing happens. I've tried 2x1GB too, and it's still the same. Also, the memory passes endless hours of memtest at 1110MHz, 4x1GB, 5-5-5-12.
Anyway, here's the voltages I'm using at the moment:
Some of the may be artificially high right now as I'm testing things. These voltages gave me 12 hours+ of prime stability at 452x8, memory 5:6 (1084). I think I can do these CPU frequencies with lower vcore, but I haven't tried lower yet.
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