Well, what really prompted this crisis is AI, as well as Samsung shutting down some production (and I have to say I don't think they mind that the pricing has skyrocketed as a result!)
If the shortage of RAM is because of AI (so servers/data centers I presume?), wouldn't that mean the shortage should be localized to RDIMM rather than the much more common UDIMM that most gaming PCs use? But it seems to me like the pricing is going up more for UDIMM than RDIMM.
UDIMM and RDIMM use the same DRAM chips. And my understanding is that the fabs can switch between DDR5, LPDDR5, and maybe HBM as needed. This means high demand for one type can create a shortage of the others.
> This means high demand for one type can create a shortage of the others.
Wouldn't that mean that a shortage of DRAM chips should cause price difference in all of them? Not sure that'd explain why RDIMM prices aren't raising as sharply as UDIMM. That the fab and assembly lines have transitioned into making other stuff makes sense why'd there be a difference though, as bradfa mentioned in their reply.
It's a valid question if you're not familiar with the RAM market. Sorry you're getting downvoted for it.
The manufacturers make the individual chips, not the modules (DIMMs). (EDIT: Some companies that make chips may also have business units that sell DIMMS, to be pedantic.)
The R in RDIMM means register, aka buffer. It's a separate chip that buffers the signals between the memory chips and the controller.
Even ECC modules use regular memory chips, but with extra chips added for the ECC capacity.
It can be confusing. The key thing to remember is that the price is driven by the price of the chips. The companies that make DIMMs are buying chips in bulk and integrating them on to PCBs.
> Even ECC modules use regular memory chips, but with extra chips added for the ECC capacity.
Quite a few unbuffered designs in the past had a "missing chip". If you ever wondered why a chip was missing on your stick, it's missing ECC. Don't know if it's still the case with DDR5 though.
I have not seen that yet DDR5, I think the signal integrity requirements are too high now to even have unused pads open. Most sticks don’t appear to have many traces at all on the top/bottom sides, just big power/ground planes.
Also with DDR5 each stick is actually 2 channels so you get 2 extra dies.
Because manufacturers transitioned fab and assembly lines from low margin dram to higher margin products like hbm, hence reducing dram supply. But the demand for consumer grade dram hasn’t changed much so prices for it go up.
The “regular” and “premium” label at the pump is misleading. The premium gas isn’t better. It’s just different. Unless your car specifically requires higher octane fuel, there is no benefit to paying for it. https://www.kbb.com/car-advice/gasoline-guide/
But yes we're going to need more fabs for sure