Funky,
I think I know what is going on here. First of all you have not increase you vcore from the default 1.7V (TBirds starting at 1GHz use 1.75V). Please don't set the vcore based on hardware monitor program, just go by the vcore adjustment setting. The second reason is the memory setting is tuned way over than what your Ram can take. You have the FSB running at 115 to 120MHz and that fine if you are using HOST CLK in DRAM Speed. Now this is the part that's went wrong, when you set the DRAM Speed to HCLK+33 (4/3=1.33, 100MHzX1.33=133MHz). You are thinking 115MHz+33MHz=148MHz. Nope. At 115MHz fsb with the HCLK Ratio 4/3=1.33 (115MHzX1.33=153MHz). At 153MHz memory speed, your ram might be able to run using CAS3 but definitely not CAS2 unless you have good PC150 CAS2 Ram. To take care of your problem, raise a little vcore to 1.75-1.85V and use HOST CLK in DRAM Speed+max memory timing. or it is time to unlock that TBird of yours.