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Funny business with PCI lanes on 9900k

mitropower
Level 7
Ok,

I am planning an upgrade of my rig (specs on left), and coming from 5930k with 40 lanes, all this business with 9900k having only 16 lanes is a real downer. Since I am not really keen on giving extra 500e for 9900X, because 5930k did not cost 1000e and had 40 lanes, I am looking at some options to get a rig better than I already have without selling my organs.

I am looking at Extreme XI, it attracted my for its DIMM.2 among other things. And I am a bit concerned that DIMM.2 riser card only seems to work directly on PCI lanes taking away 4x.
One of the things I plan on doing is going SLI and that will already push my GPUs config into x8/x8, if I also use DIMM.2 that will then push my cards into x8/x4 (how the hell does Intel consider 16 lanes CPU an enthusiast gamer CPU is beyond me).

So, ultimately can the riser card be redirected to use PCH instead? And even if so, how is that a good things? Is Maximus XI really not a good solution here because it will effectively offer lower performance to SLI customers because CPU ****blocks it? My train of thought is that if I use PCH for M.2 in order to dedicate CPU lanes to GPU, what does this board really offer that a lower priced does not (Formula is 50e cheaper, Hero half the price)? What am I not seeing?
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12 REPLIES 12

x-rated wrote:
SSDs can use another 24 lanes available from PCH 🙂


I'm sorry if I'm a retard.. Haha!

Here's what I'm getting https://www.samsung.com/semiconductor/minisite/ssd/product/consumer/970pro/ and does the top right slot where the NVMe drive goes (OR is the top right slot NOT for NVMe - I dont have the board yet) use a different set of lanes? 😄

I'm sorry if I'm not following you 😄

x-rated
Level 8
there are 16 lanes from CPU, usually used for one graphics card in x16 mode or 2 graphics cards in x8 mode + another 24 lanes from PCH for other PCIE cards, SSDs etc 😄 and all boards support NVMe

x-rated wrote:
there are 16 lanes from CPU, usually used for one graphics card in x16 mode or 2 graphics cards in x8 mode + another 24 lanes from PCH for other PCIE cards, SSDs etc 😄 and all boards support NVMe


Thank you so much. That explains it 😄 Sometimes I need explanation like I'm 5 😄 Appreciate your time!!!