Kill GPU performance by installing 2 Nvmes

[Anton van der Wel]

Hello PC-Masters,

 

Due to a discount this christmas, it was much cheaper to buy two M.2 which were 512 GB, instead of one M.2 of 1 TB.

Also I always prefer to have more small drives due to flexibility and safety. 

 

Couple days later I found out that installing 2 M.2 SSDs on my motherboard (MSI B450 gaming pro carbon, link: https://www.msi.com/Motherboard/B450-GAMING-PRO-CARBON-AC/Specification ) could cripple my GPU performance.

 

Since I could not find a clear answer on the internet I decided to ask here. 

Question: Is there any Performance decrease for the GPU by installing two M.2 and if there is any what percentage of performance decrease are we talking about?

 

Thank you in advance,

 

Anton

 

[Murasaki]

Do you have two GPUs running in your system?

 

Looking at the motherboard manual and details on the site it states:

PCI_E2, PCI_E3, PCI_E4 and PCI_E5 slots will be unavailable when installing M.2 PCIe SSD in M2_2 slot.

PCI_E4 will run x1 speed when installing devices in any PCIe 2.0x1 slot.

 

You still have PCI_E1 running unaffected performance-wise. This will be fine if you are using only one GPU.

[Zagna]

With Ryzen, the CPU provides 24 PCIe 3.0 lanes. 16 for the GPU, 4 for a dedicated NVMe and 4 for chipset connection.

With that motherboard, the second M.2 is connected from the chipsets 8 PCIe 2.0 lanes.

So the GPU will get full 16x, first NVMe 4x from CPU, second NVMe 4x (2.0) from the chipset.

[Anton van der Wel]

Thank you guys very much!

 

It is a great relieve to hear that my system will work fine. Thank you again for all the help.