News DDR4-4000 Rumored To Be The New Sweet Spot For AMD Ryzen 5000 CPUs

[nofanneeded]

Worrying about whether something is "worth pursuing" is futile when it is impossible to begin with.

It is not impossible it is just very expensive would be like $15,000 for 64GB of RAM . and for that not much research and design was put in it . saying it is impossible is too early here ... because it would need total CPU redesign ... and it is open for research .

I agree that today memory sockets will not work with SRAM ... but this does not mean it is a closed impossible subject as you said .

Once the price of making SRAM is close to like $1000 per 64GB of RAM , they will put R&D on it.

I found this article , it is a good read ..

http://www.qdpma.com/ServerSystems/SRAM_Main_Memory.html

will research it further , I like the subject.

 

[InvalidError]

I agree that today memory sockets will not work with SRAM ... but this does not mean it is a closed impossible subject as you said.

Sockets are becoming borderline even for DRAM, DDR5 will likely be the last generation before CPUs require on-package L4$.

 

[nofanneeded]

Sockets are becoming borderline even for DRAM, DDR5 will likely be the last generation before CPUs require on-package L4$.

Can HBM2 be socketable above the CPU ? that is upgradable ? you add more modules ?

 

[InvalidError]

Can HBM2 be socketable above the CPU ? that is upgradable ? you add more modules ?

Nope, the solder ball density is way too high for socketing and the traces between HBM and whatever they connect to can only be a few mm long, that's why HBM stacks are butting right against the GPU die or whatever else they are connected to. On a CPU, the HBM stacks would need to be under the IHS.

 

[cryoburner]

While traditional RAM might near its performance limits, that doesn't necessarily mean all RAM needs to get moved to the processor. More likely, we would see some fast RAM getting added to the CPU itself as a larger cache, but the majority would still take the form of DIMMs.

Whereas a modern 8-core Ryzen has 0.5MB L1, 4MB L2, and 32MB L3 cache, it could be possible to add something like 1GB or more of fast RAM on its own chip to the interposer as well. So, such a processor might have an IO chip, one or more core chiplets, and a RAM chip. The bulk of system memory could still remain in DIMM form though (or soldered to the motherboard as in some devices).