The chipset then creates a bunch of pci-e lanes, I think it's 8 for the B550 chipset but I may be slightly wrong. it's mostly supported, especially threadripper supports this quite well, but it's not a guarantee on AM4 motherboards. Pci-e x4 to 1 m.2 nvme, and 1 m.2 sata : Īlso, the motherboard and the bios need to support a feature called bifurcation, in order to detect and work with 4 devices "sharing" those 16 pci-e lanes. you'll get a maximum of around 1.8 GB/s in each pci-e x1 slot. You can then buy pci-e x1 adapter boards for the two pci-e x1 slots, and put two m.2 drives on those slots. You can buy an adapter board that converts the pci-e x16 (x4) electrically into a M.2 connector - they're 10-15$ a piece. So if you add 2 m.2 ssds, the pci-e x16 slot goes down to pci-e x8.ģ. ex there's a gigabyte b550 board which takes the 16 pci-e lanes from the cpu and splits it into 8 + 8 and uses 8 pci-e lanes for 2 m.2 connectors, for 3 m.2 in total. You can change the board for one that has more m.2 connectors. You can put the hyper card in the actual pci-e x16 slot with 16 lanes, and hope the board supports bifurcation and you'll see the 4 extra m.2 drives.Ģ. You can move your video card to the bottom pci-e x16 (x4 electrically) and your video card will run at pci-e 4.0 x4 - which is more or less the same as pci-e 3.0 x8, so you'll lose a bit of performance maybe 2-5% in some games and mostly at high resolutions like 1440p or higher. Your video card will suffer but you get 4 working m.2 connectors. Now you could in theory rescue this screwup. Also, the card relies on bios and motherboard support, they must support bifurcation and not all motherboards support it. it doesn't have an active switch or any "brains" inside it. The Asus Hyper card NEEDS 16 pci-e lanes, because it simply splits those 16 lanes into 4 groups, each with 4 pci-e lanes. The botton pci-e x16 slot is pci-e x4 electrically, it has only 4 pci-e lanes coming from the chipset. The motherboard DOES HAVE 2 pci-e x16 slots, but only the first is pci-e x16 electrically and physically. it's mostly supported, especially threadripper supports this quite well, but it's not a guarantee on AM4 you kinda f**ed up. The Hyper card needs to have 16 pci-e lanes in the slot, to split them into 4 separate groups of 4 pci-e lanes, and route 4 lanes to each m.2 connector.Īlso, the motherboard and the bios need to support a feature called bifurcation, in order to detect and work with 4 devices "sharing" those 16 pci-e lanes. So the Asus Hyper card will work if plugged into that bottom pci-e x16 slot, but only one of the m.2 connectors on the Hyper card will work, because there's only 4 pci-e lanes in the slot. You can see that the 2nd pci-e slot is always locked at maximum 4 pci-e lanes, so it's a pci-e x4 slot, in the physical shape of a pci-e x16 slot. You can see this on the asus page for your board : ĪMD Ryzen™ 5000 Series/ 3000 Series Desktop ProcessorsĪMD RyzenTM 4000 G-Series / 2000 Series ProcessorsĪMD RyzenTM 3000 G-Series / 2000 G-Series Processors 2 lanes go to 2 pci-e x1 slots - 1 lane per slot. 4 lanes go to the bottom pci-e x16 - the slot is physically x16 so you can insert any size card in it, but the slot actually has only 4 pci-e lanes going to it.ģ. The chipset exposes 10 pci-e 4.0 lanes which can be arranged by motherboard manufacturer in various configurations. Some of the lanes are used inside the chipset to connect USB controller, SATA controller, and other things. The chipset takes these 4 lanes from the CPU and behaves like a "network switch", creating a bunch of pci-e lanes. 4 lanes go to the first m.2 connector (the one closest to cpu socket) This is not the case with your motherboard.Ģ. Thank you for that information, however, the board specifications state 2 x PCIe 4.0/3.0 X16 slotsġ. 16 lanes go to video card slot - the motherboard manufacturer can choose to put two pci-e x16 slots on the board and automatically switch the slots to pci-e x8 if a second card is inserted.
0 Comments
Leave a Reply. |