3 ms·

Almost nobody runs 4 sticks of unbuffered DDR5 anyway, because you wouldn't be able to get them to run above 4800 and you'll be spending several minutes waiting

by _cenw 2y ago

Almost nobody runs 4 sticks of unbuffered DDR5 anyway, because you wouldn't be able to get them to run above 4800 and you'll be spending several minutes waiting for memory training. And you get a minimum of 16GB per stick unless you buy modules with dead ranks. There's so little margin to total signal degradation in DDR5, these improvements are actually necessary (and more upgrade friendly than the inevitable future of memory on SoC).

nottorp 2y ago
> And you get a minimum of 16GB per stick unless you buy modules with dead ranks. 16 Gb per stick means you need 4 sticks to have a reasonably future proof 64 G...
- _cenw 2y ago
  That's the smallest size, 32 on a single module also exists. There is no conspiracy to deprive you of density. Most consumers will just appreciate latency over more than 64GB of memory. And yes, that's a real world performance gain, especially on larger AMD chips where L3 isn't shared among all cores. If you want density, use a workstation board and registered memory, which offloads a bunch of responsibility of a central memory controller to the module itself, so you can stick terrabytes of somewhat fast memory in there.
  - Tuna-Fish 2y ago
    > Most consumers will just appreciate latency over more than 64GB of memory. Note that the choice here is not either/or, so long as you are willing to pay for it. For example: https://www.corsair.com/us/en/p/memory/cmk96gx5m2b6600c32/vengeance-96gb-2x48gb-ddr5-dram-6600mt-s-cl32-memory-kit-black-cmk96gx5m2b6600c32#tab-techspecs https://www.corsair.com/us/en/p/memory/cmk96gx5m2b6600c32/ve...
    - _cenw 2y ago
      yep, that's hynix m-die. not sure what the status quo is, but you used to be able to buy a cheap kit as long as the timings indicated hynix, and they'd manually overlock quite high without issues.

3 ms·

Almost nobody runs 4 sticks of unbuffered DDR5 anyway, because you wouldn't be able to get them to run above 4800 and you'll be spending several minutes waiting

by _cenw 2y ago

nottorp 2y ago
> And you get a minimum of 16GB per stick unless you buy modules with dead ranks. 16 Gb per stick means you need 4 sticks to have a reasonably future proof 64 G...
- _cenw 2y ago
  That's the smallest size, 32 on a single module also exists. There is no conspiracy to deprive you of density. Most consumers will just appreciate latency over more than 64GB of memory. And yes, that's a real world performance gain, especially on larger AMD chips where L3 isn't shared among all cores. If you want density, use a workstation board and registered memory, which offloads a bunch of responsibility of a central memory controller to the module itself, so you can stick terrabytes of somewhat fast memory in there.
  - Tuna-Fish 2y ago
    > Most consumers will just appreciate latency over more than 64GB of memory. Note that the choice here is not either/or, so long as you are willing to pay for it. For example: https://www.corsair.com/us/en/p/memory/cmk96gx5m2b6600c32/vengeance-96gb-2x48gb-ddr5-dram-6600mt-s-cl32-memory-kit-black-cmk96gx5m2b6600c32#tab-techspecs https://www.corsair.com/us/en/p/memory/cmk96gx5m2b6600c32/ve...
    - _cenw 2y ago
      yep, that's hynix m-die. not sure what the status quo is, but you used to be able to buy a cheap kit as long as the timings indicated hynix, and they'd manually overlock quite high without issues.