so what is the difference between z97 vs z97 express chipsetand between h97 vs h97 expresss chipset.does they will work

[anand singh]

so what is the difference between z97 vs z97 express chipset
and between h97 vs h97 expresss chipset.

does they will work on refresh haswell cpus
like mine is intel core i5 4460

 

[Paul NZ]

I've got an ASUS H97 mobo here, and yup it works with the haswell refresh CPU's. I'm using the G3240 in it at the mo.

Some info here about H97 and Z97

http://www.pugetsystems.com/labs/articles/Z97-vs-H97-What-is-the-Difference-562/

From an official chipset perspective, there are only two differences between Z97 and H97 chipsets. The first is the fact that the Z97 chipset supports CPU overclocking, while the H97 chipset does not. Secondly, the Z97 chipset has the ability to split up the 16 PCI-E lanes from the CPU which allows for SLI/Crossfire video card configurations.

Which isnt quite correct. You can use the G3258 on the H97 now and it can be overclocked. With a BIOS update

 

[i7Baby]

Same as between H87 and Z87 - Z97 can overclock more than H97

See http://en.wikipedia.org/wiki/LGA_1150

 

[anand singh]

why z87 motherboard requires bios update for fresh insatlled haswell processors

 

[i7Baby]

They (Haswell refresh/Devils Canyon) are different CPUs than what the motherboards were made for

 

[clownwolf]

Your question is phrased weirdly. Are you asking about z87 vs z97 and h87 vs h97?

As for z97 vs z97 express and h97 vs h97 express, there are no differences. The 'express' does not mean anything, they are the same intel chip. Some people just call chipsets by their full name, like "intel z97 express"