You should better wish that the DRAM manufacturers make memories with appropriate widths. In-band ECC is a horrible workaround, which has a real hardware cost

You should better wish that the DRAM manufacturers make memories with appropriate widths. In-band ECC is a horrible workaround, which has a real hardware cost much higher than traditional ECC, in additional die area, increased energy consumption and much lower performance. Intel has published some information about their in-band ECC controller, while NVIDIA, as usual, is much more secretive. The performance of in-band ECC would be unacceptable without the addition of a special rather big cache memory and a great increase in complexity in the memory controller, which is required to implement clever caching algorithms. No matter how clever is the caching algorithm, there will still be workloads where the performance will be much lower than with standard ECC.