Motherboard won't recognize M.2 NVME correctly. Using PCIe 3.0 instead of PCIe 4.0

[YourLocalKitten]

Hi! I ran into a problem recently. I switched my Mainboard to a TUF Gaming B550-Plus and put in an M.2 SSD in the spot where the mainboard manufacturer said that there would be the PCIe 4.0 lane. Unfortunately, the BIOS says it's using the GEN3 Version. Also running a disk benchmark is showing that it won't get the speed that it's supposed to get. If someone has an idea why that is let me know!
Also sorry if I posted this thread on the wrong Topic.

 

[Intel_man]

What m.2 ssd is it?

 

[beers]

If you put in a gen 3 drive it's going to down-negotiate.

 

[YourLocalKitten]

What m.2 ssd is it?

It's the WD Black SN850

 

[Darren]

Update to latest BIOS for the motherboard?

TUF GAMING B550-PLUS｜Motherboards｜ASUS USA

ASUS TUF Gaming motherboards distill essential elements of the latest Intel® platform and combine them with game-ready features and proven durability. Engineered with military-grade components, an upgraded power solution and a comprehensive set of cooling options, each ASUS TUF Gaming...

www.asus.com

Have a picture of what the BIOS shows? Are any of the fields configurable or something you can change?

 

[YourLocalKitten]

Update to latest BIOS for the motherboard?

Yes, I updated it to the latest version. After the update, I checked if anything changed but unfortunately nothing changed.

Have a picture of what the BIOS shows?

I hope this helps:

https://imgur.com/a/Un0WiDM

 

[Darren]

That does seem odd, even the motherboard manual says that option should be Gen 1, 2, 3, or 4, or Auto.

https://dlcdnets.asus.com/pub/ASUS/misc/Manual/PRIME_TUF_GAMING_B550_Series_BIOS_EM_WEB_EN.pdf

Have you tried the other M.2 slot?



Realistically, you're probably not going to see much noticeable different outside benchmarks between GEN 3 and GEN 4, but I understand wanting it to work as designed.

Might reach out to ASUS support but can't guarantee they'll be any help.

 

[YourLocalKitten]

Have you tried the other M.2 slot?

Yeah, I tried the other one too but nothing changed...

Might reach out to ASUS support but can't guarantee they'll be any help.

Gonna do that later, just wanted to look if someone had a similar problem so I'm contacting the support for something that could be fixed with some other help.

 

[Darren]

Hah I work in technical support so my default is usually get the vendor involved.

Something seems weird and given what you've tried, they're likely going to be the ones that know. I did some Googling and couldn't find anything similar.

Just a thought, is there any firmware update from WD for the SSD?

 

[YourLocalKitten]

I did some Googling and couldn't find anything similar.

I googled too before and also didn't find anything what was strange, 'cause normally at least a few people have the same problem but this seems like an undetected problem or a problem nobody talks about.

Just a thought, is there any firmware update from WD for the SSD?

Actually, there was an update, but even after the update nothing changed unfortunately

 

[beers]

What CPU are you using? Some releases like 5600G only negotiate at PCIE3 for expansion slots.

 

[YourLocalKitten]

What CPU are you using? Some releases like 5600G only negotiate at PCIE3 for expansion slots.

I'm using the AMD Ryzen 5 2600 CPU

 

[johnb35]

I'm using the AMD Ryzen 5 2600 CPU

That would be why. You need 3000 series cpu to support 4th gen.

 

[beers]

I'm using the AMD Ryzen 5 2600 CPU

As per @johnb35 pcie 4.0 wasn't introduced until Ryzen 3000 series. The 2600 only supported PCIE 3. Your motherboard can support PCIE4 if you use a CPU that supports PCIE4, but won't otherwise.

 

[YourLocalKitten]

That would be why. You need 3000 series cpu to support 4th gen.

Ah okay. Thank you really much!

As per @johnb35 pcie 4.0 wasn't introduced until Ryzen 3000 series. The 2600 only supported PCIE 3. Your motherboard can support PCIE4 if you use a CPU that supports PCIE4, but won't otherwise.

Also thank you.