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I’m running 64Gb 3200mhz 16-18-18-38 4x16gb
That’s really weird, your boosts are better with no PBO, 6 or your cores are over 5ghz where as with PBO only one of your cores boost to 5ghz
Mine is 3200MHz as well, and that was the ten minute test where I got the 25509. The RAM is a hyperx part, DDR4-3200 CL16-18-18, and I have 64Gb installed.
I haven't tried PBO. Any time I've tried messing with the RAM timings (when I had the 3800X in here) the machine just wouldn't boot.
Can you do just one run....and are you running 4 or 2 sticks?