PCI lanes how many? What shares? how???

[Edgar R. Zakarian]

@LinusTech PLEASE make a techquickie video on how PCI lanes work and how and why you need a certain amount!

 

I'm SO confused.

 

I got a GPU that needs 3.0 16x lanes, but I also have a Wireless net card. Does it then only use 1 lane? 4 lanes? 16 lanes?

 

How???

 

My cpu (7600k) apparently "only" supports 16 pci lanes??

 

SOOOOO Confused right about now.

 

So If i was to add for example 1 more 1080ti would it just not even detect it?

What If i added 2 PCI SSD's on top of that, what would THEN happen?

 

Since there are only 16 lanes, and the GPU uses it all, would it run faster, if I took the Net card out, and used the built-in LAN?

[DnFx91]

5 minutes ago, Edgar R. Zakarian said:

@LinusTech PLEASE make a techquickie video on how PCI lanes work and how and why you need a certain amount!

 

I'm SO confused.

 

I got a GPU that needs 3.0 16x lanes, but I also have a Wireless net card. Does it then only use 1 lane? 4 lanes? 16 lanes?

 

How???

 

My cpu (7600k) apparently "only" supports 16 pci lanes??

 

SOOOOO Confused right about now.

 

So If i was to add for example 1 more 1080ti would it just not even detect it?

What If i added 2 PCI SSD's on top of that, what would THEN happen?

 

Since there are only 16 lanes, and the GPU uses it all, would it run faster, if I took the Net card out, and used the built-in LAN?

really dude ? at least check youtube before asking stuff like this, there are literally 3 or 4 videos on the channel about PCIe lanes

[Glenwing]

6 minutes ago, Edgar R. Zakarian said:

I got a GPU that needs 3.0 16x lanes

They don't need 16 lanes, they just support up to 16 lanes. Performance won't change if you drop to 8 though.

 

The small PCIe x1 slots do not use any of the CPU's 16 lanes, those are only used for the long slots. x1 slots use the auxiliary PCIe lanes provided by the motherboard chipset.

[minibois]

Your motherboard provides some PCI lanes as well, usually for running 'extra cards', like your network card, soundcard, etc.

Usually when you add a second GPU, they both start running at 8x (your motherboard changes this automatically) which does not impact performance.

 

How the M.2 slots are used depends on your motherboard. Sometimes it starts running the second one in SATA mode.

 

Also, where did you get that 640TB WD Green drive from?  

[Mambozambo]

Read your motherboard's manual to get more info. Some x1 slots for example disable USB slots if used. Or if you put any card on other than the main x16 slot, the main slot lowers down to x8 (or maybe even down to x4) doesn't matter if the card would be x1 or x16 sized.

[Biggerboot]

You'll want to read into your motherboard's manually specifically for how certain pcie slots are used, or if a device uses pcie lanes (via it's own documentation or support network), because they all compensate differently.  

Usually where you have to account for PCIe lanes is when you start adding m.2 SSD.  

Some wireless cards use the form factor, but not the actual PCI express lane/speed.  I normally wouldn't worry about pci-e lanes in regards to the x1 slots.

[Princess Luna]

13 hours ago, Glenwing said:

.

Am I safe to assume that same applies to ancient PCI ports present in boards like the Asus h110m-C right? those are handled by chipset and don't interefere with the CPU lanes.