M2 PCIe Lane usage?

[Jammanzilla98]

Hey, I'm in the process of researching my upgrade to Skylake, and I'm thinking of adding an M.2 SSD, as the board I'm thinking of getting (MSI Z170A SLI Plus) has it's own M.2 slot, however, I'm going to be running my current graphics cards in Crossfire (2x Radeon HD 7770's, not much but they do the job). I'm under the impression that my chosen cpu, the i7 6700k, only has 16 PCIe lanes available, however I've heard around various forums that the chipset supports an additional 20 lanes or something of the sort? Could you guys give me a hand in figuring out if using an M.2 SSD is going to take up some of the CPU's 16 lanes, and reduce the bandwidth the cards are running at, or is it going to use some mystical lanes that are provided by the motherboard? If it will cause me to lose bandwidth on the GPUs, I'd rather just stick to my current drives, as one of my main motives for upgrading was to have my GPUs working better (they're currently working at PCIe 2.0 x16 and x4, and hopefully after the upgrade they'll be running at PCIe 3.0 x8 and x8). Thank you in advance for any advice! It's proven difficult to find the answer to this on my own!

 

Motherboard: (https://www.msi.com/Motherboard/Z170A-SLI-PLUS.html#hero-overview)

CPU: (http://ark.intel.com/products/88195/Intel-Core-i7-6700K-Processor-8M-Cache-up-to-4_20-GHz)

[zMeul]

Intel Z170 Chipset: http://ark.intel.com/products/90591/Intel-GL82Z170-PCH

[zberry7]

Check the manual, but withZ170 the m.2 drives don't use the PCIe lanes allocated for your graphics card, it will use lanes from the chipset

[Jammanzilla98]

Thanks guys!