On that 8-9 yr old model it would be a waste of money even if you could. Think about upgrading memory and/or hard drive instead. Better still, put the money towards a new computer.
it is your PC and your cash
you can do what ever you want, no job stated (killer app) that runs too slow , so no advice really on that.
sure you can. upgrade if what you nave is the cheaper slower CPU.
the H67 chip set will only allows gen2, gen 3, just that 1 chip alone on any PC on earth with it.
then bios , then what Dell allows for watts and last what the mobo can do BW.
upgrade the BIOS first.
then new CPU, that does not use out of spec, too high TPD watts.
uses Sandy Bridge based Intel Core i5 / i7 processors. only. and Ivy bridge some. 3770.
the 150watt and 130watt no way, jose'
the list is here, Id go 65watt max but ID DO NOT HAVE MOBO VRM POWER SPEC< its a secret at dell.
95watt maybe with right heatsink, not 65watt HS no way.
the unknowns are, what gen 3 it runs (never all), and not too many watts and BIOS ALLOWS.
1,2,3 and if there are any BW limits or clock limits..... IDK , this is not documented at dell, no true spec.
like say ASUS Z270 prime, clear specs.
answer 2, vastly more easy, why not read what others did, the 40million others.
lets go there now. (im doing this now , not tech way below,, ok)1265 did, this.
if smarter than me (easy) learn to use filters there, to hone in on max CPU.
but gee, 1/2 way down that pate is the 3770, clear as day. see?
never ask dell this, ask REAL PEOPLE for sure, 1000 hits is low, nobody hot rods this OLD PC.
zero net gain is way.
i did not click through all 60 pages there to find max CPU. not me, im a lazy dog.