Finally after months of googling I came across your posting!
And you are the only one that solved this problem so many people on the net experienced but could not solve unless they read you posting!
Even R&D Daniel Huang 黃沛峰 of SUNIX Co., Ltd. 三泰科技股份有限公司 Mobile: +886-928-893958 .......I'm Here (Taiwan) (wanted me to phone him?)
nor Barend Nel, Intel Techie of Pinnacle here in Cape Town
could not come up with an answer!
I loaded the older BIOS and Hey, IT WORKS !!
I then loaded the latest Bios 5561 and Hey it still works!
You are my hero!!! (for the moment anyway!
Thanks and Regards
Also add keywords: RENESAS USB3 USB2300D NECEL and NEC μPD720200