According to the Overclockers.com CPU database, the average overclock for a 2.8C is 3392. People with IC7s hit 3600 (with a Vapochill PE), 3423 (with a Zalman 7000cu), 3400 (with a stock HS/F), 3333 (with a TT SubZero4G PIV), and 3200 (with a SwiftTech MCX-4000[Delta EHE 80er]). 3200 was the lowest overclock.