When paired with the directly-competing Core i9-7900X, the new motherboards slightly outperform the old X99 platform across 3DMark and PCMark. Although it's far less-expensive, the Core i7-7800X can't stand up to the might of a 10-core CPU in 3DMark's Physics test.
Fewer shared resources; Supports 3-way SLI on 28-lane CPUs; Good memory overclocking; High-end 802.11AC controller in addition to Gigabit Ethernet; Moderate price
Mediocre CPU Overclocking; Poor efficiency; Reduced resource sharing is due to reduced feature set