“If the machine comes with a Intel HM76 Express chipset, you should be able to put an Intel I5-3230M 2.6Ghz (the i5-3210m 2.5Ghz is not supported). If the machine comes with a Intel HM70 Express chipset then the CPU upgrade is only limited to the Intel Celeron/Pentium series.”
“If you put a "Core" CPU into an HM70 Express chipset board, it will auto shut down after 30 minutes. This isn't due to heat or power or anything of that sort, it's just an artificial limitation and there's nothing you can do about it. Intel did this so they could sell the chipset cheaper to manufacturers trying to make inexpensive laptops, so those manufacturers wouldn't use a really cheap chipset with a high-end CPU. It's very much like how a Pentium is the same physical CPU as an i3 (or even mobile i5 or i7), just with parts of it disabled.”