Re: question on processors
It will depend on what the motherboard (and it's BIOS) supports, and also the thermal management of the laptop itself (i.e. the thermal design power of the processor which the laptop's cooling system can tolerate).
Why do you ask? Are you thinking of buying a new laptop, or thinking about upgrading a processor in an existing laptop?
Nearly all laptops sold today have mobile processors, designed to use less power than desktop processors, and with lower thermal design power. However, occasionally you'll come across a desktop replacement laptop utilising a desktop processor (though, it's less common these days).
If you're asking because you're thinking of replacing the processor in an existing laptop, it's always better to replace the processor like for like. If you're thinking about upgrading the processor, then to increase the chance of compatibility, it's a good idea to see whether other configurations of your laptop model exist with better processors, and upgrade to that processor. However, note that there's no guarantee that different processors will be supported by the motherboard and its BIOS, or whether your laptop's cooling system can support processors with a higher thermal power design.
|Desktop PC| |Macbook Air 13" (Mid 2013)|
|Windows 8.1 Pro (x64)| |AMD FX 4100 Black Edition 3.6 GHz @ 4.0 GHz OC| |Arctic Cooling Freezer 13 PRO| |Gigabyte Nvidia GeForce GTX 560 Super Overclock 1GB| |ASUS M5A78L-M/USB3 Motherboard| |Samsung 840 Pro 256GB SSD SATA III HDD| |Kingston HyperX 8GB PC3-14900 DDR3-1866| |OCZ ModXStream Pro 700W Modular PSU| |NZXT Vulcan Micro ATX Case|