I am surprised people still have quad-cores.... Honestly cannot remember in recent history using a quaddy.
Even my $800 AUD notebook has a 6-core CPU... And my phone has an 8-core chip.
Been using a 6-core or better CPU since 2010 starting with the Phenom 2 x6 1090T.
How do they handle in modern games and software?
--::{PC Gaming Master Race}::--