alt Hacker News> A connector of any kind reduces signal quality.
Like the M.2 connector?
> Data lines need to be longer
Like the data lines going all the way to an on-motherboard storage device?
Replies
The current DIMM and SODIMM modules cannot be used for much higher speeds than are available now.
This is why there are several proposals of improved forms for memory modules, which use different sockets, like LPCAMM2, which should be able to work with faster memories.
However even LPCAMM2 is unlikely to work at the speeds of soldered GDDR7.
> Like the M.2 connector?
Yes, though likely something with a higher pin count since memory access is more likely to be random and can be parallel versus block storage.
> Like the data lines going all the way to an on-motherboard storage device?
Yes. Why would a GPU manufacturer/packager take on that cost, if it’s presently served well enough for most people by offloading it onto other parts of the system?
Soldered stuff is still dramatically better than the M2 connector (than any connector really). You've never wondered why RAM doesn't use PCI Express?