How to utilize the x16 slot Gen PCIe 3.0 supports up to x1 (From Chipset), it is covered under the dual slot gpu so i am looking for a riser or something to add nvme. i found one from adt.link but way expensive. other options?
This -
And
This -
3 Likes
thank you, pcie slot is x16 Gen PCIe 3.0 supports up to x1, will it work even slot size is different?
x16 = Physical size/length of the slot and x1 = Max. supported bandwidth in that slot
PCIe is generally upwards/backwards compatible, so you should be able to use a x1 riser card. And since your x16 slot is actually a x1, a x1 riser makes even more sense. Just be mindful of the x1 bandwidth limitations, depending on what you use it for.
3 Likes
i will use it for nvme which adt link have too but i think this would be better PCIe x1 Extension Cable
If the intention is to use a NVMe adapter card, and if you care about NVMe I/O performance, you’ll also need to consider that a typical PCIe gen 3 SSD would ideally operate at x4 (assuming your drive is a gen 3 model).
Connecting this via a x1 slot would roughly mean, you are bottlenecking it to a fourth of it’s ideal speeds (in theory). Depending on what you use it for, this may be a okayish, or a terrible idea.
1 Like
Yes afaik ADT makes those really low profile 90 degree extensions. It really depends on how much clearance you have beneath the GPU. If your case has dual mount options for GPU then you can use a riser to mount it vertically and open up the slot for easier access.
2 Likes
Good point. @anon65839647 - you’ll need to observe/measure this first. Some GPUs leave too little room to practically use these extensions.
1 Like
Just curious how much bandwidth can be expected or the difference in speeds if an nvme drive is ran through a pci-ex slot rather than the dedicated nvme slot.
NVMe itself works over PCIe so…as long as the adapter / Extension is good , no difference in speeds should occur.
Take a look at x16 quad M.2 carrier card reviews to get an idea.
https://medium.com/@andrew.w.gross/things-i-wish-i-knew-about-pcie-specs-ac8dce1cc1bb
All x1 slots are through the chipset, so there’s always going to be contention compared to slots with lanes from the CPU. They’re great for low bandwith applications like USB or SATA but storage is noticeably degraded. I couldn’t get windows software raid 0 working reliably with drives on x4 CPU lanes and x4 chipset lanes on HEDT.