The new H-series mobile lineup is led by the unlocked Core i9-9980HK, which has a base clock speed of 2.4GHz and can be boosted to 5GHz. It also features eight cores, 16 threads and a 16MB cache.
The H-Series Core mobile processors are for larger laptops, compared with the Y and U series for slimmer devices. The 9th-gen H-series includes locked i9, i7, and i5 processors. The i9-9880H has a base clock speed of 2.3GHz, and a boost speed of 4.8GHz.
As noted by ZDNet sister site CNET, the 9th-generation mobile processors offer minor performance boosts on the 8th-generation processors, which introduced six- and eight-cores after years of two- and four-cores. The i7-9750H, for example, has a boost clock of 4.5GHz compared with the i7-8750H's 4.3GHz.