Wanna find some clarification about some mobile CPUs

Two main questions I want to ABSOLUTELY clear up here.

1 - The older Sandy Bridge and Ivy Bridge CPUs... the 3740QM and such. Do those have a maximum overclocking limit? Haswell has say, +200 on 47xxMQ and +400 on 48xxMQ, but I did not hear anything about these limits on the older models, and thus I never knew why people wanted to buy the XM models. Could someone clarify this for me please?

2 - The new haswell HQ series models... some of them are weird. The MQ chips are straightforward: 4-core turbo is base clock + 800MHz, 2-core is +900MHz and 1-core is +1000MHz.

The models like the i7-4860HQ however have a fairly low base clock (2.4GHz with this chip), but their maximum turbo is +1200MHz instead of +1000MHz.

Does it work like: base + 800MHz = 4-core, base + 1000MHz = 2-core, base + 1200MHz = 1-core? Or does it simply use a higher default turbo boost, like 4 core = +1000, 2 core = +1100 and 1 core = +1200?

I just need to figure out these two specific things, please. Most of the gamers don't have any of the higher-end HQ chips, so I don't see many people to ask, and I want to make sure I tell people the correct thing in the future.

 

1. i7-x7xxQM and x8xxQM allow +400 MHz OC, x6xxQM are locked down, XM are unlocked.
2. Look at the Turbo Boost ratios here: List of Intel Core i7 microprocessors - Wikipedia, the free encyclopedia

 

Okay, seems legit. Nice to know the low base speeds don't hinder the other HQ models so much.

 

LOL I love how you conveniently left out any mention of the dual-core and ULV i7's in your guide on LTT. They don't deserve the i7 name.

 

How did you even SEE that guide? Also, I did mention them XD.