alt Hacker News> Well, what really prompted this crisis is AI,
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.
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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.
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 chips come from same factory. And difference betweeen those two is... a buffer chip. And extra ram die for ECC
Same chips in both, made in the same fabs. Any relative price difference is like the difference between regular and premium gas/petrol.
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.