z77 extreme4 or extreme4-m?

[New2building]

I'm planning on buying the gigabyte radeon hd 7970, is there a difference between its behaviour on these mobos?

 

[rothingham]

The main differences are:
- The m version is smaller (µATX format againt ATX on the non-m)
- the m version has 4 PCIe slots: 2 times PCIe 3.0 x16, 1 PCIe 2.0 (I think) and 1 PCIe 1.0
whereas the non-m version has 2 times PCI 3.0, 2 times PCIe 1.0 and 2 time a PCI (these are older, but are stil wildy used for TV-tuner cards, audio cards, ...)
Both support CrossFireX. The m version also supports 3-Way CrossFireX, but you won't be able to fit 3 7970 on there, since it takes up 2 slots (it doesn't use the 2nd slot, it just blocks it)
The m version is a little cheaper (about €15, so that'll be around $20 I suppose).

So it depends on whether you'll be needing PCI slots

 

[Someone Somewhere]

Ideally go for the full size one. More expandability.

 

[kid-mid]

I'd go for another option besides the ASRock 4 series..

 

[New2building]

I'd go for another option besides the ASRock 4 series..

Perhaps you would like to recommend something? (at the same price-range)

 

[Someone Somewhere]

Main competitor IMO would be the GA-Z77X-D3H. I'd consider them about equal.