1 1 5 1 ▁revision ▁ 2 ▁ ▁Second ▁revision ▁of ▁the ▁L GA ▁ 1 1 5 1 ▁socket ▁for ▁C off ee ▁Lake ▁CPU s ▁ ▁The ▁L GA ▁ 1 1 5 1 ▁socket ▁was ▁re vised ▁for ▁the ▁C off ee ▁Lake ▁generation ▁CPU s ▁and ▁comes ▁along ▁with ▁the ▁Intel ▁ 3 0 0 - series ▁ch ips ets . ▁While ▁physical ▁dimensions ▁remain ▁un changed , ▁the ▁updated ▁socket ▁re assign s ▁some ▁reserved ▁p ins , ▁adding ▁power ▁and ▁ground ▁lines ▁to ▁support ▁the ▁requirements ▁of ▁ 6 - core ▁and ▁ 8 - core ▁CPU s . ▁The ▁new ▁socket ▁also ▁re loc ates ▁the ▁processor ▁detection ▁pin , ▁breaking ▁compatibility ▁with ▁earlier ▁process ors ▁and ▁mother boards . ▁As ▁a ▁result , ▁desktop ▁C off ee ▁Lake ▁CPU s ▁are ▁officially ▁not ▁compatible ▁with ▁the ▁ 1 0 0 ▁( original ▁Sky la ke ) ▁and ▁ 2 0 0 ▁( K aby ▁Lake ) ▁series ▁ch ips ets . ▁Similarly , ▁ 3 0 0 ▁series ▁ch ips ets ▁officially ▁only ▁support ▁C off ee ▁Lake ▁and ▁are ▁not ▁compatible ▁with ▁Sky la ke ▁and ▁K aby ▁Lake ▁CPU s . ▁ ▁Socket ▁ 1 1 5 1 ▁rev ▁ 2 ▁is ▁sometimes ▁also ▁referred ▁to ▁as ▁" 1 1 5 1 - 2 ". ▁ ▁C off ee ▁Lake ▁ch ips ets ▁( 3 0 0 ▁series ) ▁▁ ▁Like ▁with ▁K aby ▁Lake ▁ch ips ets , ▁four ▁additional ▁P CH