What is Intel's "Express chipset"? What's the difference?

[Vox]

I was trying to get some google results about this silly question without success.

I'm about to buy a mobo for my new LGA1151 g4560 Kaby Lake processor and it came up that there are 2 versions of (straightly) supported chipsets (B250, H270, Z270, Z370, etc): normal (mainstream) and Express.

At first I thought this is something related to size (microATX or ATX) but it turned out to be false. There are common ATX sizes with Express chipsets.

So what's the difference between a B250 chipset and a B250 Express chipset?

 

[alexoiu]

Same thing. Some manufacturers add the Express thing for marketing purposes, I guess.

 

[SkyNetRising]

Kaby Lake CPUs are supported by B250, H270, Z270 chipset boards (with bios update also H110, B150, H170, Z170). Z370 is for Cofee Lake CPUs.
Not sure, what you mean by express in this situation. May be presence of PCI Express slots on the motherboard?

 

[DRagor]

Hold on here. Your list is incorrect. g4560 is NOT compatible with any Z370 motherboard, and will never be.

 

[Vox]

Ok, my bad on Z370, forget it. My question was what is the "Express" thing marked on some specifics page, such as:
http://www.gigabyte.us/Motherboard/GA-B250M-DS3H-rev-10#sp

My local store also have a dropdown list to sort motherboards by chipsets and there's ticker box to include mainstream chipsets and Express chipsets separately.

 

[SkyNetRising]

All of those are "express" chipsets (have PCIE express connectivity).
There's no such differentiation as Z370 express chipset and Z370 non-express chipset.

If "express" keyword is omitted, then that's just for shortness.