RAM in which socket on motherboard.

chrismox · 12 Nov 2025 at 15:11

I’ve just taken delivery of a Sapphire Nitro+ B850M WiFi (Socket AM5) DDR5 Micro-ATX Motherboard and a Crucial Pro OC 32GB (2x16GB) DDR5 PC5-48000C36 6000MHz Dual Channel Kit.

The motherboard has 4 RAM sockets listed as A1, A2, B1, B2. Am I right in thinking that i need one stick in channel A (A1) and the other in channel B (B1)?

Thanks.

Tetras · 12 Nov 2025 at 15:24

Normally you're meant to use the 2nd and 4th slots (from CPU), which I assume in your example would be A2 and B2.

chrismox · 12 Nov 2025 at 15:42

Thanks, I’ll do that.

InkZ · 12 Nov 2025 at 16:04

Yep, usually 2nd and 4th as above, but I'd still double check the manual, it usually says.

Tetras · 12 Nov 2025 at 16:11

InkZ said:
Yep, usually 2nd and 4th as above, but I'd still double check the manual, it usually says.

It doesn't say anything about where to put them, maybe an oversight on Sapphire's part.

chrismox · 12 Nov 2025 at 16:27

Tetras said:
It doesn't say anything about where to put them, maybe an oversight on Sapphire's part.

Yeah, I did check and the manual is silent on the matter, hence why I'm here. The manual is barebones at best.

InkZ · 12 Nov 2025 at 16:46

Pretty poor they don't have that in the manual as it's quite important :/

JollyJamma · 17 Nov 2025 at 08:15

chrismox said:
Yeah, I did check and the manual is silent on the matter, hence why I'm here. The manual is barebones at best.

Almost certainly it will be slots 2 and 4 since the vast majority of DDR5 motherboards use the daisy chain RAM layout but it’s very poor that it’s not mentioned in the manual.

freddie64 · 17 Nov 2025 at 08:41

Just watched a video review of the Sapphire Nitro+ B850A board and the guy used slots A2 and B2, should think it will be the same for the B850M.

chrismox · 17 Nov 2025 at 08:47

freddie64 said:
Just watched a video review of the Sapphire Nitro+ B850A board and the guy used slots A2 and B2, should think it will be the same for the B850M.

Yeah, I did the same. Let’s hope whoever made the video knows what they’re doing.

MissChief · 17 Nov 2025 at 09:16

I've seen it marked on the board as well.

chrismox · 17 Nov 2025 at 13:18

MissChief said:
I've seen it marked on the board as well.

Good spot, it is indeed.

JollyJamma · 18 Nov 2025 at 07:31

Nice quality silk screening actually.

Some motherboards have very poor quality and messy silk screening and it’s difficult to make out what the words are.