[SOLVED] Does using PCIe Gen 3 SSD with another PCIe Gen 4 SSD slows the PCIe Gen4 SSD ??

[Topspap]

Hi

I have a ROG Strix X570-E Gaming Motherboard
with AMD Ryzen 3950X Processor
and I'm already using WD Black SN750 1TB | PCIe 3.0 x4 | NVMe 1.3 | M.2 2280 | Single-Sided
Now I'm planning to add Samsung 980 Pro 1 TB | PCIe 4.0 x4| NVMe 1.3c | M.2 | MZ-V8P1T0BW

Q: Does the Samsung SSD will work with it's Full speed or it will be affected(Slowed) by the other PCIe Gen 3 SSD ??

 

[Lafong]

Can you put the 980 Pro in a PCIe 4.0 port?

I think that board has both 3.0 and 4.0 ports.

 

[DRagor]

Nope. Each M2 slot has lanes from different source (one from CPU, other from chipset). They don't interact in any way.

 

[DRagor]

I think that board has both 3.0 and 4.0 ports.

Both ports are 4.0 assuming correct CPU (which OP has).

 

[Topspap]

Nope. Each M2 slot has lanes from different source (one from CPU, other from chipset). They don't interact in any way.

So does that mean one slot is better than the other Or they are same ?

 

[DRagor]

So does that mean one slot is better than the other Or they are same ?

Not same. Slot powered by CPU always has 4 lanes open and can always go full speed no matter what. Slot powered by chipset might be slowed down by other devices that use chipset lanes (like USB, SATA drives). It is always best to use CPU powered slot for system drive.

 

[Topspap]

Not same. Slot powered by CPU always has 4 lanes open and can always go full speed no matter what. Slot powered by chipset might be slowed down by other devices that use chipset lanes (like USB, SATA drives). It is always best to use CPU powered slot for system drive.

So since Samsung 980 Pro is PCIe Gen 4.0 (Faster) is it better to use it on CPU Powered Slot
Is it the same logic for Asus Rog Strix X-570-E ? as they didn't mention anything like this is the documentation or it may differ from motherboard to motherboard .

 

[Topspap]

What i want is to get the best performance of Samsung 980 Pro while also get the best of WD Black SN750

 

[USAFRet]

What i want is to get the best performance of Samsung 980 Pro while also get the best of WD Black SN750

NOTE: Transferring data between these two drives goes at the speed of the slowest.
No matter what drives are in which ports, or which way the data transfer goes.

 

[DRagor]

So since Samsung 980 Pro is PCIe Gen 4.0 (Faster) is it better to use it on CPU Powered Slot

Yes, although for typical use you will not see any real speed difference between PCIe 4 and 3 drives. What matters is that system drive is on CPU slot - in your case it does not matter which one will be system drive.

is it the same logic for Asus Rog Strix X-570-E ? as they didn't mention anything like this is the documentation or it may differ from motherboard to motherboard .

This is general knowledge how each chipset is built. (Some motherboards manuals have the chipset diagram - however most don't because typical user will not understand much from it). So it will be the same for each X570 board no matter which model.