Ok, so I've got two old PCs lying about. A 2.8GHz P4 and a 3.4GHz HT (550J) P4. Power hogs, as the P4 was known to be at the time.
I've also been intrigued (though information is lacking) on the J-series Celeron and Pentium chips that have come out within the past two years - the Silvermont based processors.
My question: how do the Silvermont Pentiums and Celerons compare, performance-wise to the old electricity-guzzling P4s. Say, for example, light 3D gaming (yeah, I know this is oft more GPU bound than CPU) or other CPU-intenstive tasks, that might push that archaic 3.4HT to its limit? Assume all other hardware (GPU, memory, etc) to be equal. Obviously, power consumption's an order of magnitude improved on the new ones (10W vs 80-120W), but can they keep up with the old ones in performance?
I did read a comment on a message board that pretty much said any cpu you buy today will outdo the P4s.
I mean, Tom's Hardware has a CPU hierarchy chart, but they don't count the ultra-budget stuff in there, and of course the P4s are ancient enough to not even be on the list.
But I'm curious as to how they compare with each other... (and where they might fall within the spectrum of the list on that CPU hierarchy chart, though I imagine pretty near the bottom, if not off the bottom) or compared to the old Dual Core or Core 2 Duo chips... but predominantly against each other (say, J2900 vs P4 3.4HT). Anyone know or have a ballpark idea?