Question Any point paying extra for PCIe 4.0 SSD if board only supports PCIe 3.0?

[itm]

I'm looking to upgrade my M.2 SSD from 1TB to 2TB. My current drive is a WD Blue SN550 PCIe v3.0 NVMe SSD. My motherboard is a B450 Aorus Elite, which only supports PCIe v3.0.
I've been looking at the WD Black SN850X as a replacement, but I have no idea what the performance would be like if connected to a PCIe 3.0 slot.
Would I be better off paying less for a PCIe 3.0 drive, or would I still get a significant performance uplift if I go with a newer PCIe 4.0 drive like the SN850X?

My CPU is a AMD Ryzen 7 2700X

 

[COLGeek]

The PCIe 4.0 device will operate at 3.0 speeds. No gain in that regard beyond the performance of a newer/more capable device.

What is the price difference between the SSDs you are considering?

 

[Eximo]

I did, knowing that I would eventually upgrade to a PCIe 4.0 board.

I would be interested to see if the temperatures of a PCIe 4.0 drive running at PCIe 3.0 speeds would be better than a PCIe 3.0 drive running full speed. About the only thing I can think of that could be a benefit.

 

[CountMike]

I did, knowing that I would eventually upgrade to a PCIe 4.0 board.

I would be interested to see if the temperatures of a PCIe 4.0 drive running at PCIe 3.0 speeds would be better than a PCIe 3.0 drive running full speed. About the only thing I can think of that could be a benefit.

No they wouldn't be any different.

 

[Opcod]

yes they will. new architecture and so on.. Before a full saturation of the gen3 bus you will need a lot. those supposed fast drive gen4... all test are made on the ram chip inside. After it's full, it only behave quite a slow usb 10gb drive. The best notable gain and even push higher than newer is the adata Legend 960.

 

[kourades26]

Was looking for an answer myself... I only got PCI 3.0 in my B450M-K II but the prices of the 3.0 in my country have sky rocketed, so I got a Lexar NM790 1TB 4.0 arriving tomorrow to replace my 850 evo. Hope it goes well 😛

 

[COLGeek]

Was looking for an answer myself... I only got PCI 3.0 in my B450M-K II but the prices of the 3.0 in my country have sky rocketed, so I got a Lexar NM790 1TB 4.0 arriving tomorrow to replace my 850 evo. Hope it goes well 😛

Should perform just fine.

https://www.tomshardware.com/reviews/lexar-nm790-ssd-review