[adrian_b]

At least according to more recent publications and to my own experience, a single gigabyte of good DRAM does not flip a bit every few hours, but every few months.

On non-server computers, which seldom reach peak memory usage, a bit flip may happen in a location where it does no harm.

Nevertheless, after a few years of use, a memory module can start to have frequent bit flips, even many per hour. If you have ECC, you will be notified about this and you will be able to replace the bad module. On most computers without ECC, that can easily lead to undetected data corruption.

Also, when you have 64 GB DRAM, that multiplies by 64 the error frequency.