SSD m2 adapter?

Hello

There are different M.2 SSD adapters. I guess you have the intention to put several M.2 PCIe SSD’s on the motherboard and now you’re looking for a multiple PCIe -> M.2 PCIe SSD adapter because your motherboard has only one M.2 slot.

If so, your project will not work. For a multiple adapter you need a PCIe x8/x16 slot, which must also be connected with 8 or 16 PCIe Lanes. And this is only the first PCIe 3.0 x16 slot on your motherboard. If there is no graphics card in it, you can use a PCIe -> M.2 PCIe SSD easily, twice or four times adapter and use up to 2 or 4 more M.2 PCIe SSD’s, but no more graphics card.

PCIe 3.0 x8 -> 2x M.2 PCIe 3.0 x4 SSD Adapter

PCIe 3.0 x16 -> 4x M.2 PCIe 3.0 x4 SSD Adapter

The 8 and 16 PCIe 3.0 Lanes of PCIe 3.0 x16 Slots are divided into 2x or 4x M.2 PCIe 3.0 x4 slots. Therefore, up to 2 or 4 M.2 PCIe 3.0 x4 SSD’s can be used there.

The second PCIe x16 slot on your B450 motherboard is just a PCIe 2.0 x16@x4 slot. This means that this PCIe x16 slot is only connected with 4 PCIe 2.0 Lanes from the B450 chip. There you can only one PCIe x4 -> 1x M.2 PCIe x4 adapters, no more. In this case, only a single M.2 PCIe SSD can be used on a double or four-fold adapter. The remaining M.2 slots on such an adapter remain deactivated when such an adapter is inserted in the second PCIe 2.0×16@x4 slot. Therefore, you can make use of the following adapters:

PCIe 3.0 x4 -> 1x M.2 PCIe 3.0 x4 SSD Adapter

However, M.2 PCIe 3.0 x4 SSD’s then only run at a maximum of 2000MB/s, since the adapter is in a PCIe 2.0 slot, so the maximum PCIe 2.0 x4 speed is available.

And then you have a PCIe 2.0 x1 slot. There you can use an M.2 PCIe SSD with a PCIe x1 -> M.2 PCIe SSD adapter:

PCIe 3.0 x1 -> 1x M.2 PCIe 3.0 x2/x4 SSD Adapter

However, an M.2 PCIe x2/x4 SSD, in the PCIe 2.0 x1 slot of your B450 board, is only connected to a single PCIe 2.0 Lane, which results in only PCIe 2.0 x1 speed available in this adapter, which corresponds to a maximum of 500MB/s and which would be slower than SATA 600 speed. A M.2 PCIe SSD is fully braked.

M.2 SATA SSD’s do not work in these PCIe -> M.2 PCIe SSD adapters. For this we need another adapter.

mfG computer tomb