2 X 2 sets of same DDR5 ram. Which sockets per pair?

GT Monster · 22 Jan 2025 at 22:50

When I installed the memory. I populated all 4 slots. I put the first pair in slot A1&A2. The second pair in slot B1&B2.

Should I have the pairs in this formation... Or should I have gone pair 1 in A1&B1 and the second pair in A2 & B2.

Both are matching 2x(2x16GB) sets to form 64GB purchased at same time. Can't remember exact timings. But they are G-Skill 6400Mhz currently running at 5000Mhz. Above this, they become unstable. The XMP timings were untenable running 6400Mhz at 64GB.

Is there a best slot configuration for each pair? Does mixed same pairs matter? Any advise is appreciated.

Thanks for any advise.

ToOo · 22 Jan 2025 at 23:59

DDR5 can't usually run all 4 slots at full speed on either AMD or Intel platforms, the 5000MHz you are getting is about all you can expect.

Normally the matched sets should go in first pair A2 and B2, second pair in A1 and B1, but you'll need to read your motherboard manual to be certain on this.

The reccomendation would usually be to return or sell your current kits and purchase a 64gb kit with 2x 32gb sticks if running at 6400MHz is important for you.

GT Monster · 23 Jan 2025 at 01:04

Thanks.
The motherboard manual is not the clearest on this. It eludes to populating in the following order... A1 B1 and A2. But is not clear about if this is best configuration for each pair. Funny it only shows 3 sticks in the last illustration.

Regarding speed, I'd come to same conclusion as this. To be honest, I'm a bit ****** to have spent the extra on the faster ram... I'll just leave it running stable at 5000Mhz. I'm not a massive overclocker, so I'm not chasing every clock.

I usually build a new PC every 8 to 10 years with the newest top tech. Just sometime this bites you in the ass as there's not much info to help untill it's reasonably well adopted...

Filling all the modules with high speed ram has been a problem for such a long time now that I'd forgotten when I built this one.

I guess the question here in the back of my mind is... Can I improve the memory frequency marginally to make better use of what I paid for if I correctly pair the matched pairs in the correct slots?

Ta.

Tetras · 23 Jan 2025 at 03:22

GT Monster said:
I guess the question here in the back of my mind is... Can I improve the memory frequency marginally to make better use of what I paid for if I correctly pair the matched pairs in the correct slots?

Unlikely, though it would help to know what CPU and motherboard you're using, since we can have a quick scoot around on reddit, l1techs and the like.

JollyJamma · 23 Jan 2025 at 06:55

go 2 DIMMs only - I’ll link a thread about this

WARburton · 23 Jan 2025 at 12:28

As said the ram channels are numbered 1 and 2 each channel as 2 sockets.

So channel 1A/B and 2A/B

If you got your ram new and in the last 2 weeks send it back and just buy a 2 stick kit

JollyJamma · 23 Jan 2025 at 13:37

See this thread - https://forums.overclockers.co.uk/threads/9800x3d-ram-buying-guide-by-buildzoid.18995674/

GT Monster · 24 Jan 2025 at 16:29

Tetras said:
Unlikely, though it would help to know what CPU and motherboard you're using, since we can have a quick scoot around on reddit, l1techs and the like.

Hi,
Its an Intel i9 12900KS riding on a Asus ROG Maximus Glacial Extreme Z690 motherboard.

Thanks.

GT Monster · 24 Jan 2025 at 16:37

JollyJamma said:
go 2 DIMMs only - I’ll link a thread about this

Thanks... I've known about this issue with 12th gen Intel i9 since purchase in 2022... Recent windows boot issues and new memory related BSOD issues have made me revisit this again! The reason I'm asking about the order of the RAM is purely because I wandered if mixing 2 sets of 2 slips may cause an issue. I understand that each pair are sold as a binned matching pair which I may have mixed together on the board. I may take them out and look at the serials at some point. I think my issues are greater than this though.

I'm considering moving from 4 16gb to 2 32GB slips and moving these 4 into a future build that can handle the memory in 4 slots. First though I need to determine if I need to warrantee these.

GT Monster · 24 Jan 2025 at 16:40

JollyJamma said:
See this thread - https://forums.overclockers.co.uk/threads/9800x3d-ram-buying-guide-by-buildzoid.18995674/

This came to light too late for me as an early adopter of DDR5 memory on the i9 12th gen platform... I've been round the forums and Youtube since 2022 trying to get the best out of the memory. Personally I think motherboard packaging should have provided a warning about using 4 slips instead of 2!

GT Monster · 24 Jan 2025 at 16:43

This is my latest predicament regarding the memory!

BSOD - Appears to be memory issue... but with MemTest86 all checks out

Good morning all, We have been suffering with BSOD over a considerable period of time now. The strange thing is that the issue generally occurs once a day once windows has started for the first time that day... The BSOD either occurs when Steam is downloading a game update or when using a web...

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