The 48x was set in BIOS. All of ken's setting's were also set in BIOS as well. Strangely, even if I put TDP limits in BIOS at 88W boost power and 110W short power, in Intel XTU, it shows up as 704W and 880W respectively. I changed these manually in XTU as you can see in the pictures I am posting.
I did some testing with my current limit and found something interesting:
The above is with current limit set at 166A. As you can see, there is current limit throttling with max of 61% throttle. If I set it at 167A, I get max of 15% throttle.
Now, same test above with current limit of 168A:
As you can see on the screen that I am pointing at, I had one instance of 1 throttle, but otherwise pretty clean. Average temperatures were also 2C lower than with current limit set at 256A. Apparently my magic number is 169A to get through the XTU stress test without any throttling. Everyone else seems to be at 256A. Why the difference?
Also, if you can find my previous posts, at stock speeds (44x x 4 with ASUS MB) my current limit was around 161A before seeing throttling.