If the X460 bootrom is lower than 126.96.36.199 hyperthreading is not activated which could enable much more CPU performance.
If your X460 is using a lower bootrom version than 188.8.131.52 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: 184.108.40.206
How to upgrade the bootrom is shown in below link.How to upgrade BootROM on a Summit switch