I forgot to mention the mem speed thing. The early run I had wouldn't do 2600 at all. The later one will do 2600 2T. But I have it at 2400 CS10 1T. Since that seems to perform best.
You can tell the earlier runs from the later by the shape of the lid. The later runs have a bevel on the corners of the lid. And on the bottom it looks like they used more solder on the early runs(and/or a different kind of solder maybe?). The later are less "shiny" looking. I don't know around what serial # they made the change. But I've looked at many more than the 2 I have, and they definitely aren't all the same. There seems to be at least 2 different looking production runs. The early run I fried is serial # 1290(or production # 1290, or whatever the # on the top side of the processor is called, pretty sure it designates at which point in time it was made). The later one I'm running now is # 25somethingsomething...IIRC.
I tried running without the lid on both. But I couldn't get my mounting solid enough to stay working for very long with either one. 9 times out of 10 I couldn't get the thing to turn on. And even when I did, it would shut itself off pretty quickly. So I gave up and went with a lapped lid and CL ultra underneath. Which keeps it below 95°C at all times. Tops out at 93°C under extreme conditions(earlier one @ 5.0GHz topped out less than 100°C @ 98°C). Which was consistent between both(@ 4.8GHz). Neither ran any hotter or cooler than the other(@ same clocks). Probably due to no major difference in volts. Just 1 click higher/lower to do the same clocks.
EDIT: I just looked at a bunch more 3570Ks on ebay, to see how badly I was talking out of my ass about the earlier/later run theory. Probably not too badly. But maybe a little. I came up with the idea by comparing them to a Celeron G1610 I also have. It came out the year after, and has the lid with the beveled corners. So I still think those with that style lid were made later than the others. But the number on the processor doesn't seem to tell you whether it was or wasn't. Now I'm thinking that number is the production number, lower made before higher. But it looks like they probably started over at 0001 with the later ones(I found some without the lids with beveled corners and a higher number than 2600). So that number probably only relates to others of the same production run. The other style lid(no beveled corners) also looks more similar to previous generation processors too(i.e. my old E8600). I'm pretty sure what I'm thinking now is closer to correct(if not entirely).
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