AM4 with DDR5 :: Hardware and Operating Systems

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x For 19 timer siden

AM4 with DDR5

Hi,

I was kind of curious to see if there were any boards for AM4 CPU and DDR5. I know there are significant differences, including "physical" and I wasn't expecting to find any. But sometimes there are niche needs and here and there someone makes an oddball piece of tech that makes sense to a very limited number of people.
I'm not talking about shoving a DDR4 comb into a DDR5 slot. But actually boards for AM4 processors with proper DDR5 channels and slots.

But I found some texts online that smell just like a bunch of BS and claiming they exist. They even post some examples and I checked some and they don't (as much as I could find). Both the texts below appear conspicuously similar including going back and forth between DDR4, DDR5 and even DDR3.

https://cybertechnosys.com/do-am4-motherboards-support-ddr5/

https://vtechinsider.com/what-amd-motherboards-support-ddr5/

Just goes to show you can't trust any choom off the internet.

P.S.
In the niche tech group I always include my Ryzen 5 3400G processor with the Vega11 GPU. I know it sold actually very well. In fact, IMO, it sold too well. Later AMD models rolled out with much inferior iGPUs in them (my opinion at least).

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A&A For 18 timer siden

I don't know how the memory controller will be able to handle the burst operations considering they're 2x the lenght. Might be possible if you have a logic layer in between them but the controller is a limit. It will just work as effective DDR4 but worse than a dimm with Samsung B dies.

Sidst redigeret af A&A; For 18 timer siden

nullable For 18 timer siden

I mean it's not impossible. But the cost of adding support for a new RAM standard that didn't exist when the AM4 socket was developed isn't zero. AM4 was being replaced so demand would be somewhat lessened in the face of AM5, while AM4 has no real future.

So some kind of expense, with little demand, on a dead/dying platform would limit any options. It's a fun idea, but maybe not so practical.

Plus, when AM5 and DDR5 first became available DDR5 was pretty expensive compared to DDR4, like nearly 2x the cost, which would further limit the demand for support on a aged socket that's being replaced.

Oprindeligt skrevet af A&A:
I don't know how the memory controller will be able to handle the burst operations considering they're 2x the lenght. Might be possible if you have a logic layer in between them but the controller is a limit.

I think the cost of development, plus minimal demand is probably the bigger impediment. I mean it's not really a herculean task to get something to run slower and under perform, and that's ultimately what's gonna happen on a DDR5 + AM4 socket.

_I_ For 18 timer siden

am4 cpus only have the ddr4 memory controller

am5 cpus only have the ddr5 memory controller

intel 12th, 13th, and 14th gen (socket 1700) have both ddr4 and ddr5 memory controllers on them
the boards determines which memory type to use

A&A For 18 timer siden

Oprindeligt skrevet af nullable:
I think the cost of development, plus minimal demand is probably the bigger impediment. I mean it's not really a herculean task to get something to run slower and under perform, and that's ultimately what's gonna happen on a DDR5 + AM4 socket.

It requires re-design and what you're saying it's preaty much the point, unless it's for small project, using CAMM2 instead of DIMM is more beneficial than using DDR5 instead of DDR4, but the infinity fabric is limiting factor so the memory wall stays there.

Sidst redigeret af A&A; For 18 timer siden

x For 13 timer siden

Many years ago there were some boards that could handle both AMD and Intel processors. They literally had two CPU slots, so someone did take the time to mess about.

PopinFRESH For 12 timer siden

Oprindeligt skrevet af x:
Many years ago there were some boards that could handle both AMD and Intel processors. They literally had two CPU slots, so someone did take the time to mess about.

This only existed in your mind? Unless you are referring to way back when AMD were still just Intel clones and everyone was using socket7? Otherwise this hasn’t been true since the Athlon and Pentium 3 / Celeron using Slot A and Slot 1 respectively.

Everyone used the socket that Intel made at that time because they were all intel clones. VIA, AMD, SIS, Cyrex, etc all used whatever socket Intel made for their clones with socket5 and socket7.

All of that was also back prior to DDR memory anyway and the memory controllers were not integrated in the CPUs and were in the northbridge chipset on the motherboard; so the boards fully determined what memory was supported

_I_ For 12 timer siden

Oprindeligt skrevet af x:
Many years ago there were some boards that could handle both AMD and Intel processors. They literally had two CPU slots, so someone did take the time to mess about.

those were socket 7 boards, when amd, intel and cyrix had the same pinouts

the boards with 2 sockets were for dual cpu, and needed 2 identical cpus, for use with windows nt or unix

*edit

the first cpus with the memory controller on the cpu die were intel i series, and amd am2 (opteron, sempron, phenom, a64, a64x2, a64 fx)

all cpus before that, intel socket 775/771 or amd 939/940 and earlier had the memory controller on the board or in the nb, which was moved to the cpu die too

and how the socket 7 dual cpu boards work
https://www.youtube.com/watch?v=Ruwltdtff-g

Sidst redigeret af _I_; For 11 timer siden

Lord Flashheart For 10 timer siden

Am4 is DDR4 only.
Some intel CPUs can support both DDR4 & DDR5, but motherboard with both - no.

x For 1 time siden

Oprindeligt skrevet af _I_:
Oprindeligt skrevet af x:
Many years ago there were some boards that could handle both AMD and Intel processors. They literally had two CPU slots, so someone did take the time to mess about.
those were socket 7 boards, when amd, intel and cyrix had the same pinouts

the boards with 2 sockets were for dual cpu, and needed 2 identical cpus, for use with windows nt or unix

It's all coming back now. Yes, there were dual (a matched pair) processor boards.
I also remembered the coprocessor boards. I admit I don't know much about it. Just that there were some oriented towards maths and some towards graphics design.

https://www.reddit.com/r/retrocomputing/comments/s8t3ss/new_to_retro_computer_building_why_are_there_two/

Found an AMD/Intel board from 2005. It's a computer on top of a computer? It's weird.

https://hexus.net/tech/news/mainboard/1036-cebit-2005-amd-intel-same-motherboard/

We have so very old computers stashed away somewhere here at work. Maybe I can find something to shed some light.

Also found this for some computer p*rn. Just for the eye candy for those that like older tech design:

https://www.vogons.org/viewtopic.php?f=46&t=52833

A&A For 1 time siden

Oprindeligt skrevet af x:
It's all coming back now. Yes, there were dual (a matched pair) processor boards.
I also remembered the coprocessor boards. I admit I don't know much about it. Just that there were some oriented towards maths and some towards graphics design.

The dual socket ones required the same interconnect system but co-processors are using open standard connectors.
Like how you can pair a AMD system with Intel Xeon Phi co processor.

Sidst redigeret af A&A; For 1 time siden

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