Title.

Pretty broad question but, for the most part, any mobile CPU's are unlocked. That is how they throttle speed to save battery life.

Hi, in fact there is very few ES/QS that are really unlocked on laptop, I know that like on desktop since sandy bridge you can increase the multipler by 4 bins (or sometime 2) on "high end" I7 but not unlocked, also for another exemple there is some 3720QM ES (special stepping) that are in reality 3920XM (unlocked multiplier and 8Mb of cache).

As far as I know on ivy bridge laptop we can overclock I7 37xxQM and 38xxQM by 4 bins (=400MHz more) and nothing on 36xxQM, then there is the XM cpu which are unlocked.

For C2D on laptop you can sometime use the intel "IDA" on some cpu which can increase the multiplier by one.

37 minutes ago, TheQuentincc said:

Hi, in fact there is very few ES/QS that are really unlocked on laptop, I know that like on desktop since sandy bridge you can increase the multipler by 4 bins (or sometime 2) on "high end" I7 but not unlocked, also for another exemple there is some 3720QM ES (special stepping) that are in reality 3920XM (unlocked multiplier and 8Mb of cache).

As far as I know on ivy bridge laptop we can overclock I7 37xxQM and 38xxQM by 4 bins (=400MHz more) and nothing on 36xxQM, then there is the XM cpu which are unlocked.

For C2D on laptop you can sometime use the intel "IDA" on some cpu which can increase the multiplier by one.

I already knew that the 38xx CPUs are partially unlocked, I had a 3820QM run at 4.1 GHz single core turbo.

I have a few modern ES mobile CPU's (9th and 8th gen) none of them is unlocked.(even engineering BIOS doesn't help even thou everything is unlocked in it) However I have managed to unlock a few Haswell mobile chips in past using old uCode (there was a bug in old uCode which allowed to unlock Mutliplier beyond usual values). 

Most if not all Core 2 Quad Q9200's are unlocked too.