Best to put M.2 drive in M.2_1 (PCIe5) or M.2_2 (PCIe4)

NeilF

NeilF

NeilF

Soldato
Joined
15 Nov 2003
Posts
14,411
Location
Marlow
Got a ASUS ROG Strix B650E-F Gaming and SPATIUM M480 PRO PCIe 4.0 NVMe M.2 on the way. Should I plug that M.2 into the M.2_1, M.2_2 (or M.2_3 slot)? ie: Will using the primary M.2_1 slot in anyway be counter productive to a PCIe 5 graphics card?

FYI - ASUS ROG Strix B650E-F Gaming:-
  • M.2_1 slot (Key M), type 2242/2260/2280(supports PCIe 5.0 x4 mode)
  • M.2_2 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
  • M.2_3 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)**
  • ** M.2_3 slot shares bandwidth with PCIe 4.0 x16 slot (supports x4 mode) When M.2_3 slot is operating in PCIe mode, M.2_3 will be disabled.

ps: I assume as the M.2 has its own heatsink ditch the motherboard's one?
 
There's nothing about the PCIe5 slot for M2_1 being a better connection to the CPU than say the PCIe4 M2_2 slot?

EDIT: There does seem to be general talk with Ryzen MBs that M2_1 goes straight to the CPU while the others go through a controller?
 
Last edited:
Tetras said:
It says in the tech specs and the manual which ones are connected to what, since it depends on the motherboard.

They can have a maximum of 2x CPU connected M.2 slots, but not all boards use both.


I would be less keen on this slot first, because it is under the graphics card.
Click to expand...
There's precious little in the manual. But maybe this (from the manual) implies that M2_1 and M2_2 are in effect the same animal (at least for a PCIe4 M.2 plugged in to them)?


AMD Ryzen 7000 Series Desktop Processors​
  • M.2_1 slot (Key M), type 2242/2260/2280(supports PCIe 5.0 x4 mode)
  • M.2_2 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode
AMD B650 Chipset​
  • M.2_3 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)**
  • ** M.2_3 slot shares bandwidth with PCIe 4.0 x16 slot (supports x4 mode) When M.2_3 slot is operating in PCIe mode, M.2_3 will be disabled.

So does that imply a PCI4 M.2 plugged into M2_1 or M2_2 is basically the same?
 
Last edited:
So in my case using a PCIe4 M.2, M2_1 and M2_2 are basically the same... In that case - as suggested - if M2_2 is less obscured/covered by the GPU than M2_1, I'll use M2_2.

Thanks...
 
You must log in or register to reply here.
Back
Top Bottom