You have to review the specs of your current system or mtrbd. to see if it supports DIMM3. If not, then you need a true compatible ready DIMM3 mtrbd. Now, some systems that are DIMM3 will be compatible to older DIMM2. Of course all ram modules do need to similar types/class in or to run. Its best not to mix such ram DIMM2 with DIMM3 but it can be done provided the mtrbd. supports that. And is usually the case it will run at the slowest and lower class rating. I won't expect a bios update to change anything here if any for the DIMMx case. DIMM3 is already here and expect a premium price if you rush out now. As for speed difference or any benefit, yes its there but not a wholesale increase in any big way. Of course, any increase is better than none at all and this is a solid increase.
I read that DIMM3 memory is, or is soon going to be, available, and faster than DIMM2.
Would an update be worthwhile?
Would that be a transparent switchout for DIMM2, or are older motherboards not forward compatible?