PCIe lanes

[D-J97]

Hi guys, 

Just a quick question I've just thought of and what better place to ask? 

Had my rig for about 3 years now, it's a sabertooth 990fx r2.0 and I have a 980ti and a wireless adaptor in one of the 2x slots. I know my motherboard is capable of running 2 2.0@16x cards, but will my 980ti's PCIe lane run at 16x due to my wireless card being installed? I think it should but thought I'd ask

TIA!

[MedievalMatt]

2 minutes ago, D-J97 said:

Hi guys, 

Just a quick question I've just thought of and what better place to ask? 

Had my rig for about 3 years now, it's a sabertooth 990fx r2.0 and I have a 980ti and a wireless adaptor in one of the 2x slots. I know my motherboard is capable of running 2 2.0@16x cards, but will my 980ti's PCIe lane run at 16x due to my wireless card being installed? I think it should but thought I'd ask

TIA!

it should (i used to own this board).  But honestly even if it runs at x8 you wont notice a performance hit 99% of the time.

[Matauski]

https://www.anandtech.com/show/8316/amds-5-ghz-turbo-cpu-in-retail-the-fx9590-and-asrock-990fx-extreme9-review/2
This article has a pretty decent explanation. To answer your question in short though, yes it will still run in 16x.

6 minutes ago, MedievalMatt said:

it should (i used to own this board).  But honestly even if it runs at x8 you wont notice a performance hit 99% of the time.

Hypothetically speaking he would see a performance hit since it's  PCIe Gen 2 though, right? Running it in 8x would be like running it in 4x on PCIe Gen 3, and I think a GTX 980Ti would be pretty bottlenecked by that.

 

 

 

[MedievalMatt]

16 minutes ago, Matauski said:

https://www.anandtech.com/show/8316/amds-5-ghz-turbo-cpu-in-retail-the-fx9590-and-asrock-990fx-extreme9-review/2
This article has a pretty decent explanation. To answer your question in short though, yes it will still run in 16x.

Hypothetically speaking he would see a performance hit since it's  PCIe Gen 2 though, right? Running it in 8x would be like running it in 4x on PCIe Gen 3, and I think a GTX 980Ti would be pretty bottlenecked by that.

 

 

 

https://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/23.html

Eh, it doesnt seem to matter a whole lot.

 

Edit- i realize that not a 1:1 example for the situation OP put forth.  and newer card obviously use more bandwidth.  but you can extrapolate based on the current standards.

[MedievalMatt]

Sorry to double post, but i also want to add that any CPU that OP is using on AM3+ is going to bottleneck the 980ti before the PCI-e bandwidth will.

[D-J97]

Hi all, sorry I've been a bit busy and forgot I started this thread, I'm aware that my 4.8ghz 8350 is bottlenecking but I can't afford to upgrade any time soon so trying to make the best of the hardware I have