Originally Posted by epic1337
i found this while looking up 16GB sticks.
so yeah, they were indeed 8GB per side, using 1GB per IC package.
Yup, this shows perfectly how SODIMMs are a better choice as I mentioned earlier. Since ECC is so segmented, as well as Registered/Buffered, we don't even use all the pins on a full DIMMs. some are dummy and many unused (since those ICs aren't there).. This is a good image showing that we can get density and a slot reduction at the same time for consumer boards. It would be a gain on space without any loss in functionality.
Just sucks that (probably) none of us are connected to the industry to actual influence some changes. For example, a lot of people really want mini-DTX to happen and we have a really big thread on it. But so far, not much traction.
mini-DTX example render by user Aibohphobia. Now imagine this with a slot reduction for SO-DIMMs instead. They could easily add more SATA ports or even a U.2 port there, or other things.
Originally Posted by mmonnin
There can be more than 8 chips per side. They even used to be double stacked.
Yeah as Blameless mentioned, this is only with ECC + Registered/Buffered kits. If this was what we got for all consumer kit because it wasn't so artificially segmented, I'd have no issue because they really do maximize the space then. But alas, it doesn't happen for us. We mainly get empty PCB, with dummy and unused pins taking up more space than even an x16 PCIe slot.
- A PCIe 3.0 x16 slot has 82 pins. Think about how many things we can put in there, even quad NVMe SSDs / NVMe Optane sticks.
- DDR4 consumer full DIMM has 288 pins.
- DDR4 SO-DIMMs have 260 pins.
Something just seems so off about this, especially as mentioned, we don't even get easy access to ECC & Buffered ICs. So, we're wasting board space, wasting PCB space and getting nothing in return for it on consumer boards (from gaming, to enthusiast to even workstations who don't opt for ECC).
Speaking of RAMBUS, they even came out with ODR; Octal Data Rate
: Eight bits per clock cycle per lane.
. Imagine the performance on that if it would have been improved upon like DDR has! It was used on the PS3. =Dhttps://en.wikipedia.org/wiki/XDR_DRAM
https://en.wikipedia.org/wiki/XDR2_DRAMEdited by TheBloodEagle - 9/29/17 at 1:09am