Post B6GDtY6eM4CMqQEwrI by azonenberg@ioc.exchange
(DIR) More posts by azonenberg@ioc.exchange
(DIR) Post #B6GChN0xfU0F0zCxzU by gsuberland@chaos.social
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good news: DDR5 prices have come down from pants-on-head silly to regular silly, putting them in that range where you could *maybe* justify buying some but you'll hate yourself afterwards.
(DIR) Post #B6GChN97BAWbQH1ThQ by azonenberg@ioc.exchange
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@gsuberland Maybe for DDR5 modules.Have you seen what Digikey wants for loose DDR4 ICs? $300+ for a single 16Gbit IC
(DIR) Post #B6GDAcP5WxYT8pRKnw by 23n27@dgc.social
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@azonenberg @gsuberland We're specing out a new embedded Linux design at work and it's painful.
(DIR) Post #B6GDIItLxWawwXGE40 by azonenberg@ioc.exchange
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@23n27 @gsuberland at this point i would say if you possibly can, use [SO]DIMMs. Even if you don't have enough DQ lines and need to use half the data bus or something.It'll cost an arm OR a leg, rather than an arm AND a leg. The economies of scale have always meant that the cost per GB of DIMMs vs loose chips, unless you are making stuff by the thousands or tens of thousands, is significantly better.
(DIR) Post #B6GDJy4EM5Uqw68rom by azonenberg@ioc.exchange
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@23n27 @gsuberland and with the crunch I feel like the crossover point has gone significantly up in volume
(DIR) Post #B6GDtY6eM4CMqQEwrI by azonenberg@ioc.exchange
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@23n27 @gsuberland also consider the simpler PCB routing, less placements, potentially less PCB layers for dimm vs chip-down layout, i'll always prefer a dimm for my own projects
(DIR) Post #B6GDwMsAZrb6sBoM5I by 23n27@dgc.social
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@azonenberg @gsuberland We're just barely below that point (we "only" need 4-8 GBit), but it's still a huge contribution to the BoM. Also size is a bit of a concern.