Just for comparison here is the 1st generation core i3 330um (ultramobile 18w chip+3.5w chipsett) at 1.2 ghz 2 cores 4 threads
Single
1297
Multi
2982
Multi speedup
2.30 (remeber it is just a dual core, hyperthread added a little over 15%)
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single core is a little to low!?
1.2GHz Core 2 Duo SU 9300 (10W CPU and +-15W NB+SB I think?)
1391.5
2463
cb 10 32bit
anyway, just for fun I looked at some much older stuff, it's around the same single core score as a 2GHz Athlon XP.
at the same time if you look at the first Atom (230) from 2008 the gains is huge, it only achieved 550 points for the single core test.