Pcie 4x to dual nvme?

cruisinbeatz · 1 Feb 2025 at 01:39

Hey folks. As the title says I am wondering if there is such a thing as a pcie 4x to dual nvme adaptor of sorts. I can find a dual card that is nvme and sats, both m.2 but need both nvme if possible. I have a few x16 slots obviously but I need the x16 to go full speed and if I put anything in any of the other 2 it cuts it down to a 8x slot. I was advised if I could get a dual nvme for my pcie 4 slot then this would be my way around it for my drives. Not sure if I could put one on the pcie 4x and maybe the 1x? My board is a x570 hero wifi of that makes any difference.

Thanks for any help or assistance.

Rroff · 1 Feb 2025 at 01:47

AFAIK to have more than one NVME on the same PCI-e slot requires bifurcation which is usually only supported on a limited number of PCI-e slots, usually 1 or 2 full x16 slots.

Tetras · 1 Feb 2025 at 13:01

cruisinbeatz said:
Not sure if I could put one on the pcie 4x and maybe the 1x?

You can get adapters to put them in a 1 lane slot, but I'm not sure all M.2 drives support operating with 1 lane.

cruisinbeatz · 1 Feb 2025 at 17:31

Rroff said:
AFAIK to have more than one NVME on the same PCI-e slot requires bifurcation which is usually only supported on a limited number of PCI-e slots, usually 1 or 2 full x16 slots.

Yea I know that bit as I had to enable it for an Asus pcie card I used to have and shared with my GPU however while I could use that again I happened to be lucky enough to get a 5080 and think 8x would be a big let down for it.

Not sure what to do.

cruisinbeatz · 1 Feb 2025 at 17:32

Tetras said:
You can get adapters to put them in a 1 lane slot, but I'm not sure all M.2 drives support operating with 1 lane.

Oh really? Ah sugar to that then. I may think of something else then.

WARburton · 1 Feb 2025 at 17:41

what was you trying to achieve here?

your board supports 2 x m.2 @ pcie4.0 and 1 x m.2 @ pcie3.0
are they already in use and you just wanted more space?

im not 100% sure about your board but some AM4 when you used a pcie slot you can lose some m.2 sockets because of pcie lain limits

cruisinbeatz · 1 Feb 2025 at 17:47

WARburton said:
what was you trying to achieve here?

your board supports 2 x m.2 @ pcie4.0 and 1 x m.2 @ pcie3.0
are they already in use and you just wanted more space?

im not 100% sure about your board but some AM4 when you used a pcie slot you can lose some m.2 sockets because of pcie lain limits

My board is Asus hero wifi x570 I think. From what I was told and read there's no limits when all are populated and same with the sata ports.

Yes I have 5 nvme drives. Have more but kind of need 5. I have the 3 slots occupied currently and all running great. I use the Asus nvme raid card which split my 16x lane to 8x for my 3080 to which I remember asking here before and a few stated that I shouldn't be affected with a 3080 and 8x.

I'm guessing I'm worried with the 5080 that's coming I'll need the 16x slot which means I'll have to remove my Asus card that contains 2 of my nvme drives. I don't mind them running slower if need be but I don't want them hindering the 5080 per se.

So I guess it looks like I'm trying to have my cake and eat it at the same time.

WARburton · 1 Feb 2025 at 18:12

right ok.
depending on drive size you could try consolidating a few into one larger drive.

but yes i would want a full x16 slot for a 5000 card really

or even a massive HDD as a dump drive to offload things that dont need ssd speed

Tetras · 1 Feb 2025 at 18:25

cruisinbeatz said:
I use the Asus nvme raid card which split my 16x lane to 8x for my 3080 to which I remember asking here before and a few stated that I shouldn't be affected with a 3080 and 8x.

I'm guessing I'm worried with the 5080 that's coming I'll need the 16x slot which means I'll have to remove my Asus card that contains 2 of my nvme drives. I don't mind them running slower if need be but I don't want them hindering the 5080 per se.

So I guess it looks like I'm trying to have my cake and eat it at the same time.

You have PCI-E 4.0 right now, right? So, effectively what you have is 16 lane PCI-E 3.0?

According to TPU's testing (with a 5090) you lose:
- 4% (relative to PCI-E 5.0) at 1080p or 1440p
- 2% (relative to PCI-E 5.0) at 4K

Not ideal, but still significantly faster than a 3080.

WARburton · 1 Feb 2025 at 18:28

Tetras said:
You have PCI-E 4.0 right now, right? So, effectively what you have is 16 lane PCI-E 3.0?

According to TPU's testing (with a 5090) you lose:
- 4% (relative to PCI-E 5.0) at 1080p or 1440p
- 2% (relative to PCI-E 5.0) at 4K

Not ideal, but still significantly faster than a 3080.

thats not bad tbf, with him looking at a 5080 the percentage would be less right?

Tetras · 1 Feb 2025 at 18:31

WARburton said:
thats not bad tbf, with him looking at a 5080 the percentage would be less right?

I'd imagine so, but I'm not sure.

cruisinbeatz · 1 Feb 2025 at 18:40

Tetras said:
You have PCI-E 4.0 right now, right? So, effectively what you have is 16 lane PCI-E 3.0?

According to TPU's testing (with a 5090) you lose:
- 4% (relative to PCI-E 5.0) at 1080p or 1440p
- 2% (relative to PCI-E 5.0) at 4K

Not ideal, but still significantly faster than a 3080.

Are those results based on pcie 3.0? Sorry to be stupid. So if I kept things the way I currently have only with a 5080 instead those results are what I would lose technically?

cruisinbeatz · 1 Feb 2025 at 18:41

WARburton said:
right ok.
depending on drive size you could try consolidating a few into one larger drive.

but yes i would want a full x16 slot for a 5000 card really

or even a massive HDD as a dump drive to offload things that dont need ssd speed

Yea you might be right. I have a few 2tb drives. I could always even get SATA SSD however they are almost as expensive as the nvme.

Tetras · 1 Feb 2025 at 18:41

cruisinbeatz said:
Are those results based on pcie 3.0?

Yes, they listed it as:
- 16 lane PCI-E 3.0 OR
- 8 lane PCI-E 4.0 OR
- 4 lane PCI-E 5.0

cruisinbeatz said:
So if I kept things the way I currently have only with a 5080 instead those results are what I would lose technically?

Correct.

hornetstinger · 1 Feb 2025 at 18:44

It sucks that speed goes down when you use more PCI-E slots,I mean what's the point of them?
I have all three slots used on mine, soundcard and NVME adapter

cruisinbeatz · 1 Feb 2025 at 19:37

Tetras said:
Yes, they listed it as:
- 16 lane PCI-E 3.0 OR
- 8 lane PCI-E 4.0 OR
- 4 lane PCI-E 5.0

Correct.

Hmm... Thats really interesting to know. Those tests, were they done by a user on here? I would like to see them or if it was a video etc... just for curiosity sake. But thank you kindly everyone for all your help that seems the best route for me to go as I am not for upgrading my board,CPU and ram combo just yet. Still have to tell the Mrs I got the 5080. On that topic, anyone know of any cheap coffins? Might have no issue with pcie when she finds out lmao

Tetras · 1 Feb 2025 at 19:43

cruisinbeatz said:
Still have to tell the Mrs I got the 5080. On that topic, anyone know of any cheap coffins? Might have no issue with pcie when she finds out lmao

cruisinbeatz said:
Hmm... Thats really interesting to know. Those tests, were they done by a user on here? I would like to see them or if it was a video etc... just for curiosity sake.

TPU:

NVIDIA GeForce RTX 5090 PCI-Express Scaling

The new NVIDIA GeForce RTX 5090 is the first high-end graphics card that makes use of a PCI-Express 5.0 bus interface. Are you in trouble when trying to run it on PCIe 4.0? What about x8, like when an SSD is using up some bandwidth? We've also tested various PCI-Express 3.0, 2.0 and 1.1 configs...

www.techpowerup.com

You can check Gamers Nexus on YouTube if you want a video, I think other reviewers have looked at it too.

cruisinbeatz · 1 Feb 2025 at 19:46

Tetras said:
TPU:

NVIDIA GeForce RTX 5090 PCI-Express Scaling

The new NVIDIA GeForce RTX 5090 is the first high-end graphics card that makes use of a PCI-Express 5.0 bus interface. Are you in trouble when trying to run it on PCIe 4.0? What about x8, like when an SSD is using up some bandwidth? We've also tested various PCI-Express 3.0, 2.0 and 1.1 configs...

www.techpowerup.com

You can check Gamers Nexus on YouTube if you want a video, I think other reviewers have looked at it too.

Ah Tech Power Up. Jees I'm stupid. You sir are a legend thank you kindly for the links. Proper gentleman.

Journey · 1 Feb 2025 at 19:48

Do the following, buy m.2 to u.2 adapter, get 15.36TB U.2 NVMe 4.0 enterprise grade SSD for £700-800 and sell all the other drives, could go for a 7.68GB if you want to spend less, but if you are buying a 5080 you must like wasting money.

cruisinbeatz · 1 Feb 2025 at 19:59

Journey said:
Do the following, buy m.2 to u.2 adapter, get 15.36TB U.2 NVMe 4.0 enterprise grade SSD for £700-800 and sell all the other drives, could go for a 7.68GB if you want to spend less, but if you are buying a 5080 you must like wasting money.

Haha yea if only. I got the 5080 at what I think was reasonable. Yes it was more than I wanted to pay but what I seen others go for I got a bargain and with that I got some funds back with TCB which helps also. But honestly if I didn't get one I wasn't going to be too worried but I was extremely lucky. I had another 1 in my cart and before I got to the pay screen it errored out. Obviously someone got it before me. Just happened to go on eBay to see prices and nearly choked on my drink. I'm all for someone making a few quid. That's how the world goes around but asking double the money is madness. Makes it even worse is that there will be someone who will pay it sadly.