Close to Metal

Close to Metal is a perk in Fallout 4.

Effects
The player character has 1 more guess to dial the password in terminals. Also, terminals have 50% less time to be reset after failed hacking.

To gain the perk, the Sole Survivor has to befriend Nick Valentine.

Behind the scenes
In computing, Close To Metal is the name of a beta version of a low-level programming interface developed by ATI, now the AMD Graphics Product Group. This refers to Nick being a prototype synth.