Losty, if you have it set at FSB 101/33 + 4 and HST CLK + PCI CLK , your RAM would be running at 133 + 5 = the RAM speed at 138MHz
For example, mine is set at 105/35 + 4 = 109. RAM at 135 + 9 (RAM is at HST CLK + PCI CLK) = 144MHz.
EDIT: Sandra does not report the RAM speed correctly.