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How do 400 series AMD boards handle PCIe lanes?

Hi
I was just wondering how AMD splits PCIe lanes to devices, specifically with multiple NVME drives. For me I have 2 m.2 drives, one force MP300 @ Gen.3 x2 and one WD SN550 @ Unknown speeds. I also have a gpu. I know that Ryzen has 24 lanes total, 20 for devices and 4 for chipset. In my case would the cpu split the lanes like this?
16X to GPU
2x to MP300

2x to SN550

Happy Mothers Day Yall!

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The best way to determine this is to look at the motherboard's spec sheet. 

"It pays to keep an open mind, but not so open your brains fall out." - Carl Sagan.

"If you place a piece of bread somewhere on Earth, and another one on that point's antipodes, well you made yourself an Earth-sandwich." - Michael from Vsauce.

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4 from the CPU for one, 4 from the chipset for the other 

I WILL find your ITX build thread, and I WILL recommend the SIlverstone Sugo SG13B

 

Primary PC:

i7 8086k (won) - EVGA Z370 Classified K - G.Skill Trident Z RGB - WD SN750 - Jedi Order Titan Xp - Hyper 212 Black (with RGB Riing flair) - EVGA G2 650W - dual booting Windows 10 and Linux - Black and green theme, Razer brainwashed me.

Draws 400 watts under max load, for reference.

 

Linux Proliant ML150 G6:

Dual Xeon X5560 - 24GB ECC DDR3 - GTX 750 TI - old Seagate 1.5TB HDD - dark mode Ubuntu (and Win7, cuz why not)

 

How many watts do I need? Seasonic Focus threadUserbenchmark (Et al.) is trash explained, PSU misconceptions, protections explainedgroup reg is bad

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16 for GPU, 4 for one M.2 slot and 4 for chipset. Some boards can split 16 for GPU into 8 and let you run more M.2 SSDs (B450-I from Asus gets 1 extra M.2 slot working with this) but otherwise, all gets connected to the chipset leaving that PCIe 3.0 x4 to serve them all along with SATA drives.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: 1TB HP EX920 PCIe x4 M.2 SSD + 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172), 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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It depends on what CPU you have (Matisse vs Picasso), and what motherboard you have.

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