Question Slow PCIe Gen4 SSD on X570 MSI MEG Unify ?

[Tolakangin]

Hello,

So I already have SSD PCIE Gen4 (Firecuda 520), installed on M.2 Slot 1 (CPU). But I found that it runs really slow, even slower that PCIE Gen3 in general. Both with my Gen 3 SSD run slower too (ADATA SX8200 pro). I don't know if I made mistakes with PCIE Lane configuration (Currently set to x8+4+4 Gen4 on 1st M.2 Slot). But every setting show same result in Crystal disk Mark.
I have returned previous Firecuda cause it doesn't show speed as advertised. And the speed is still the same. So I thought it must be something with my motherboard setting.

Here is my spec:

MSI MEG Unify x570
Ryzen r9 3900
RAM HyperX Fury RGB 32GB
Asus Strix RTX 2080s
SSD Firecuda 520 512GB (Gen4) - Slot 1 ----------------SYSTEM C
SSD ADATA sx8200pro 1TB - Slot 3 ----------------- F DRIVE
SATA : SSD 128GB Transcend, HDD WD 2TB and 4TB
PSU Corsair RM750
Setting PCIE Lane slot M.2 1 (8+4+4)

the rest is set to Auto.

 

[TommyTwoTone66]

The write speeds on the second benchmark are very low. But it might just be how that drive is. The very cheap ssds do have slow write speeds.

 

[Maxxify]

First, run CrystalDiskInfo to see if the link speed is correct. Second, make sure write caching is enabled on the device in Windows (Device Manager).

 

[Tolakangin]

Here's after reseat the slot. It reads as NVME 4x 16GT now.

Read 4941 MB/s Write 538 MB/s

But still the write speeds is too slow for PCIE gen4

<a href="https://imgbb.com/"><img src="https://i.ibb.co/frPz2rb/Firecuda-520-New.png" alt="Firecuda-520-New" border="0"></a><br /><a target='_blank' href='https://imgbb.com/'>open foto</a><br />

 

[Tolakangin]

The write speeds on the second benchmark are very low. But it might just be how that drive is. The very cheap ssds do have slow write speeds.

It isn't cheap SSD actually. Firecuda 520 PCIE Gen 4.

I already tried to swap the slot. And found that everything that installed on M2.1 (CPU Lane) always showed as x2, which resulted half speed. I also re-seated the CPU but the result still the same.