This is the second time I have heard of this happening.
I have two G41-ES2L boards and they each have a 2.00 multiplier. I have used them with E5200, E6500, and E7500 CPU's. I also have a P35 and two different P45's used with E5200, Q6600, and Q9550. They all have a 2.00 multiplier. I don't know what is going on.
Any chance you have a G41MT-ES2L using DDR3 RAM?