Lately, there have been a slew of new CPUs intended for netbooks and ultraportables. You will notice the ones from AMD and Intel are already capable of supporting DDR3 RAMs.
Check this chart for a list of the more common ones I’ve been seeing in the market:
You will notice that Intel has the N4x5 model with the same specs as the N4xx (i.e. N450 vs. N455 and N470 vs. N475). The difference is basically support for DDR3 on the N4x5.
On the other hand, the newer ones by AMD offers single-core and dual-core CPUs with higher cache memory. I’m particularly interested with the dual-core K325 running at 1.3GHz and how it compares with Intel’s SU4100 or SU7300.
Notice thought that TDP of the AMD chips are still way higher at 12watts; that’s almost twice that of the ones from Intel so they should be some noticeable battery life differences between the two.