4 ms·
shorter traces than soldered DIMM allow higher MT/s, this is fixed by CUDIMM/CAMM2, the other part of this is # of memory channels on the board, not sure why, b
by mistercheph 10mo ago
shorter traces than soldered DIMM allow higher MT/s, this is fixed by CUDIMM/CAMM2, the other part of this is # of memory channels on the board, not sure why, but most consumer DDR5 boards have been 2 memory channels, you need to go to threadripper to get 4 or 8, It's unclear to me if this will still be an issue with future platforms.
- wtallis 10mo agoYou're not paying enough attention to the performance and cost impact of connectors and sockets. CAMM2/LPCAMM and CUDIMM have yet to be demonstrated operating at speeds that speeds that match the fastest soldered LPDDR, let alone GDDR; there's still a clear advantage for soldering memory. CPU sockets with more than two memory channels are also far more expensive; the higher pin count usually increases the number of layers the motherboard needs, and the larger size of the socket requires more metal for stiffening (and EPYC CPUs still have issues with imperfect mounting leading to some IO lanes not working). Using BGA soldering for both the processor and the memory sidesteps a bunch of engineering challenges.
- kasabali 10mo ago> Using BGA soldering for both the processor and the memory sidesteps a bunch of engineering challenges. by trading them with longevity challenges. Even though 2 decades have past after the "usual suspect" lead-free solder, gpu or vram chips needing a reball is still a common occurrence from a cursory look at YouTube channels of professional electronics repairmen.