He inherited his father's appanages in the west sometime later before 990, becoming the founder of the Hasanid branch of the Karakhanid family.
[1] He invaded Samanid domains in 991 on the invitation of disgruntled vassals and governor of Khorasan - Abu'l-Hasan Simjuri, beginning the Karakhanid-Samanid wars.
He adopted honorific titles "Sahib ud-Dawla" (Possessor of the State) and "Zahir al-Dawaa" (Supporter of the Cause) same year, strucking coins in Ilaq.
[3] Bughra Khan fell sick in Bukhara sometime later and Nuh's uncle Abd al-Aziz the ruler of the Samanid dynasty as a Karakhanid puppet, traveled to Samarkand, and then died on the road northward near Kochkarbashi, Tien Shan.
He had several sons: Yusuf Qadir Khan who inherited his domains in west, Ali Tegin, Muhammad Toghan Khan, Shihab ud-Dawla Suleyman who ruled Uzgen and Adod ud-Dawla Husayn who ruled Ilaq.