[0] https://www.tomshardware.com/reviews/samsung-980-m2-nvme-ssd...
[1] https://www.tomshardware.com/reviews/ram-speed-tests,1807-3....
[0] https://www.tomshardware.com/reviews/samsung-980-m2-nvme-ssd...
[1] https://www.tomshardware.com/reviews/ram-speed-tests,1807-3....
Once the index is too big to have in one place, thing get more complicated.
You want something like PM1735: PCIe 4.0 x8, up to 8000 MB/s sequential read.
And while DDR5 is surely faster the question is what the data access patterns are there.
In almost all cases (ie mix of random access, occasional sequential reads) just reading from the NVMe drive would be faster than loading to RAM and reading from there. In some cases you would spend more time processing the data than reading it.
PS all these RAM bandwidth rates are good for the sequential access, as you go random access the bandwidth drops.
https://semiconductor.samsung.com/ssd/enterprise-ssd/pm1733-...