If the X460 bootrom is lower than 220.127.116.11 hyperthreading is not activated which could enable much more CPU performance.
If your X460 is using a lower bootrom version than 18.104.22.168 upgrade to the latest.
The bootrom version is displayed in show version
X460-48p.1 # sh ver
Switch : 800324-00-13 xxxxx-xxxxxxx Rev 13.0 BootROM: 22.214.171.124
How to upgrade the bootrom is shown in below link.How to upgrade BootROM on a Summit switch