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Even for chiplets? I'd expect that you could probably get okay yields at okay costs if you are running a process that's a rev or two behind and making smaller
by cduzz 3y ago
Even for chiplets?
I'd expect that you could probably get okay yields at okay costs if you are running a process that's a rev or two behind and making smaller chiplets that are then wired together after testing -- like the pentium pro's cache but for main memory to get 2 / 4 / 8gb ram all on "chip"
It'd probably cost more than a normal CPU, but the trade off is much more speed and the actual computer / motherboard at that point would just be a couple USB devices. You (the CPU maker) would grab a lot more of the per-unit profit.
Ah -- that's why they don't do it; no vendor would want their milkshake drunk...
- eropple 3y agoAMD does seem to be trying new stuff with Strix Point Halo, but in-package RAM seems like it'd add new physical challenges that probably need a defined market before they swing for the fences? Because it's not just the memory chip, also the interposer it's stacked on top of, which now needs to be bigger, which means you need to find more room in the PCB (today) or a bigger silicon interposer (likely in the near future) which reduces yields, and so on and so forth. If you wanted to have more than the very limited SoC RAM, you'd also then be looking at having multiple DRAM controllers, which also adds to surface area, and so on and so forth.