Hi CZ,

I found that I needed 1.65 vdimm. I've tried as high as 1.7, but it only helps a tiny bit, so I left it at 1.65. Sometimes +.1 nb helps mem stability. I had to back off just slightly for 24/7 to 1600, running cpunb @2400 with 1.225 volts. I'm using the 1333 mem divider (looks like you are too) @240 ref clock. With the 1600 divider, it won't even post @c7. Luckily, I'm able to achieve tight timings, but your mileage may vary. Currently 777 21 1t and tight on the subtimings too. Wish I had a nicer cpu.

I didn't notice any real difference with the newer bios, but I've been changing a lot of variables. It's worth a shot. They all kinda blur together after a while, even with notes.