Series 9 chipsets?

Llamageddon

Reputable
Aug 25, 2015
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4,520
I was reading the TH review of the Intel Core i7-4790K 4.0GHz Quad-Core and it said a few features would only be available on a motherboard with the series 9 chipset. What exactly does that mean and how can I tell if a MB has is. Is the Z97 Express chipset series 9 for instance or is it more complex than that.

Google just made things even more confusing so thanks for your help.