Question Enough lanes for PCI bifurcation on x370?

[CoDrift]

So, long story short I keep running out of storage, mostly because of the terrabytes of backup of projects I work on (Game Development).
I was considering getting a 4 NVMe to PCI x16 card like this. But from what I understand, only 1 of 4 NVMe will show in windows if my motherboard doesn't support splitting the PCI lanes.

I wasn't able to find anything in the bios other than setting the PCIe lane from Gen 3 to Gen 2 (CPU supports Gen 4 but motherboard doesnt).

Specs:

CPU: Ryzen 5 5600
Motherboard: Asrock x370 killer sli ac (Bios updated to support Ryzen 5000 series)
RAM: 3200MHz DDR4
GPU: Zotac RTX 3080 Ti AMP HOLO

Current memory configuration:

SN770 1TB (Top-most M.2)
SN530 256GB (Bottom-most M.2)
NM620 2TB (Connected over PCIe using an adapter)

This is how my motherboard and storage is configured atm:

Thanks in advance, I just wanna make sure this will work before spending 200$ on SSDs lmao.

 

[SkyNetRising]

If both PCIE x16 slots are used, they operate in x8 mode.
If you put PCIE x16 adapter with 4 NVME dives, then only two of those drives will work.
Bifurcation still has to be supported.

Use SATA drives for your project backups. No need for NVME.

 

[CoDrift]

If both PCIE x16 slots are used, they operate in x8 mode.
If you put PCIE x16 adapter with 4 NVME dives, then only two of those drives will work.
Bifurcation still has to be supported.

Use SATA drives for your project backups. No need for NVME.

Hmmm, interesting. Sata is an option but I wanna stick with no cables setup and fast storage to utilize the multi-gigabit upload speed incase anything needs to be synced with the work server.

Is there any chance that I can use the 4 separate x1 slots using 4 of these adapters?

 

[SkyNetRising]

Is there any chance that I can use the 4 separate x1 slots using 4 of these adapters?

Those adapters completely negate any purpose of having fast NVME drives.
PCIE x1 slots on your board are PCIE 2.0 - they are slower than SATA.
SATA 3.0 is ~500MB/s , PCIE 2.0 x1 is ~450MB/s.

 

[CoDrift]

Those adapters completely negate any purpose of having fast NVME drives.
PCIE x1 slots on your board are PCIE 2.0 - they are slower than SATA.
SATA 3.0 is ~500MB/s , PCIE 2.0 x1 is ~220MB/s.

I agree, but I think PCIE 2.0 x1 is around 500 MB/s in half duplex. I could upgrade the motherboard if needed to get Gen 3 x1 for about 1GB/s. (Yes, I know NAS servers exist but the requirements are a bit specific in my usecase).

In any case, I just need to know if it would work without interfering with the GPU's performance or anything else.

 

[SkyNetRising]

I agree, but I think PCIE 2.0 x1 is around 500 MB/s in half duplex.

Right. Slight error in bandwidth numbers.
But still no benefit compared to SATA 3.0.

I just need to know if it would work without interfering with the GPU's performance or anything else.

Your graphics card would probably obstruct lower two PCIE x1 slots.