Aavid Thermal Technologies, Inc. Exhibit 12.1 NINE MONTHS ENDED FISCAL YEAR ENDED DECEMBER 31, -------------------------- --------------------------------------------- September 26, October 2, 1994 1995 1996 1997 1998 1998 1999 ------ ------- ------ ------ ------ ------------- ---------- Net income 2,835 (715) (30) 8,493 8,121 5,177 9,487 Extraordinary item - - 171 - - - - Provision for income taxes 1,677 831 2,002 4,824 4,385 2,832 5,241 ------ ------ ------ ------- ------- --------- --------- "Earnings" 4,512 116 2,143 13,317 12,506 8,009 14,728 ------ ------ ------ ------- ------- --------- --------- ------ ------ ------ ------- ------- --------- --------- Fixed Charges: Interest expense including amortization of debt expense and discount 1,567 2,611 1,591 2,178 1,611 1,272 899 "Fixed Charges" 1,567 2,611 1,591 2,178 1,611 1,272 899 ------ ------ ------ ------- ------- --------- --------- ------ ------ ------ ------- ------- --------- --------- Earnings available for fixed charges 6,079 2,727 3,734 15,495 14,117 9,281 15,627 Ratio of earnings to fixed charges 3.9 1.0 2.3 7.1 8.8 7.3 17.4 PRO FORMA PRO FORMA PRO FORMA YEAR ENDED NINE MONTHS ENDED NINE MONTHS ENDED DECEMBER 31, 1998 SEPTEMBER 26, 1998 OCTOBER 2, 1999 Net income (23,302) (18,698) (18,409) Provision for income taxes 226 219 2,569 "Earnings" (23,076) 18,479 (15,840) ------- ------ ------ ------- ------ ------ Fixed Charges: Interest expense including amortization of debt expense and discount 26,113 19,585 19,646 "Fixed Charges" 26,113 19,585 19,646 ------- ------ ------ ------- ------ ------ Earnings available for fixed charges 3,037 1,106 3,806 Fixed charges exceed earnings by: 23,076 18,479 15,840