ACC just released how they were doing it:
"The approved format will continue to have each member institution play eight conference games per season, with all 17 teams playing each other at least twice over the next seven seasons – once at home and once on the road. The current 14 conference teams will play a total of three times each in California over the seven years and none will travel west to California in back-to-back seasons.
The new scheduling model protects 16 annual matchups. Of the 16 matchups, 11 are retained from the current 3-5-5 schedule model, two are restored rivalries from the divisional format in Miami-Virginia Tech and NC State-Wake Forest and the three new schools fill the remaining three. The annual protected matchups are Boston College-Syracuse, Boston College-Pitt, Syracuse-Pitt, North Carolina-Virginia, North Carolina-Duke, North Carolina-NC State, NC State-Wake Forest, NC State-Duke, Duke-Wake Forest, Virginia Tech-Virginia, Florida State-Clemson, Miami-Florida State, Miami-Virginia Tech, Stanford-Cal, Stanford-SMU, and Cal-SMU."
CHARLOTTE, N.C. (theACC.com) – The Atlantic Coast Conference announced today its future football schedule model for the next seven years, 2024 through 2030. With the addition of the ACC’s three new member institutions next summer – University of California (Cal), Southern Methodist University...
theacc.com