My vTT is well below vCore.

vCore = 1.425 (in BIOS, which gives me 1.408v actual (under load)
vTT = 1.26, and I think I can run this lower and remain stable

So what gives? There's a huge difference between the two voltages and no instability. vTT is a bit scary. I'm reluctant to push it over 1.4v.