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I9 9900k pci lanes


I'm trying to understand if i can get what i need from this processor.

I plan on buying the i9 9900k with a Gigabyte z390 Master.


I will be transferring the following from my current system:

4x16 sticks of RAM (64GB total)

GTX 1080

10Gb Ehternet PCI Express card

1 NVMe m.2 drive

2 SATA SSD drives


I will add a Blackmagic Decklink card to output video to my studio grading monitor.


I could probably add another NVMe drive down the road and another SATA SSD.


I followed some discussions and couldn't understand whether this setup is feasable or not.

My understanding is that i need 16 lanes for the GPU, 4 lanes for the 10GBe card, 4 lanes for the decklink card.

This sums up to 24 lanes.

I am not sure if the NVMe drives also take their share of lanes from the same pool or not and whether this CPU can handle it.


Would love some clarification from the knowledgeable members here ?





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The CPU has 16 lanes for meant for the PCIe slots for the graphics cards. The rest come from the PCH, which is connected to the CPU via the DMI that effectively has a PCIe 3.0 x4 speed. However, this likely isn't a problem unless the devices connected to the PCH are constantly hammering RAM or vice versa.

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Basically you get 16 lanes from the CPU, and 4 from the chipset. so 20. If you need more, your GPU will bump down to 8x. There's virtually no performance hit between 8x and 16x when referring to a GPU. So you should be fine

My Build, v2.1 --- CPU: i7-8700K @ 5.2GHz/1.288v || MoBo: Asus ROG STRIX Z390-E Gaming || RAM: 4x4GB G.SKILL Ripjaws 4 2666 14-14-14-33 || Cooler: Custom Loop || GPU: EVGA GTX 1080 Ti SC Black, on water || PSU: EVGA G2 850W || Case: Corsair 450D || SSD: 850 Evo 250GB, Intel 660p 2TB || Storage: WD Blue 2TB || G502 & Glorious PCGR Fully Custom 80% Keyboard || MX34VQ, PG278Q, PB278Q

Audio --- Headphones: Massdrop x Sennheiser HD 6XX || Amp: Schiit Audio Magni 3 || DAC: Schiit Audio Modi 3 || Mic: Blue Yeti


[Under Construction]


My Truck --- 2002 F-350 7.3 Powerstroke || 6-speed

My Car --- 2006 Mustang GT || 5-speed || BBK LTs, O/R X, MBRP Cat-back || BBK Lowering Springs, LCAs || 2007 GT500 wheels w/ 245s/285s


The Experiment --- CPU: i5-3570K @ 4.0 GHz || MoBo: Asus P8Z77-V LK || RAM: 16GB Corsair 1600 4x4 || Cooler: CM Hyper 212 Evo || GPUs: Asus GTX 750 Ti, || PSU: Corsair TX750M Gold || Case: Thermaltake Core G21 TG || SSD: 840 Pro 128GB || HDD: Seagate Barracuda 2TB


R.I.P. Asus X99-A motherboard, April 2016 - October 2018, may you rest in peace. 5820K, if I ever buy you a new board, it'll be a good one.

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