Per HECKLER's remark -- essentially "TRUE."
I have a DDR BOOSTER, and it works. There is nothing empirically robust that I have at the moment that confirms this "belief," but I "believe" it stabilizes voltages to memory even if it's set down to its minimum -- your motherboard's "maximum."
I have another friend who uses it to bump up his OCZ VX modules to 3+V -- maybe higher.
Other friends have said "I'd never put something like that in my system," but they're also afraid to over-clock, even though they have a range of settings under stock VCORE and VDIMM which would allow them to do so.