For coins ETHW and ETHF this option works best for video cards with 8Gb memory or more, if you enable caching for video cards with less than 8Gb memory your miner can show error and stop working.

For ETC, the function will work on cards with 6GB of memory or more.

For ERG, the function will work on cards with 5GB of memory or more.

You can enable caching by writing these commands in your miner settings:

GMiner--cache_dag 1
lolminer --enablezilcache
--extra-dag-epoch 0
T-Rex(HiveOS)"extra-dag-epoch": 0
NBMiner(HiveOS)"enable-dag-cache": true
nanominerzilEpoch = 0