On the official sit where you have to choose a cpu to download the wallet there are many models missing.
In fact, all those earlier intel core i5/i7 like sandy bridge that support avx but not avx2
As a result, that wallet version is never recommended for download and users are force to choose standard instead
The standard version is for non-avx2 CPU's.
If you select any of the CPU's in the list, the AVX2 version is shown.
This is correct.
(Go and try running the AVX2 version on a non-AVX2 CPU, report back your findings)
That's not what I meant.
There exists a version for avx1 on GitHub. This should be the recommended for sandy/ivy bridge and perhaps earlier core i5/i7 (but not core 2 duo/quad)
But such processors are not on the list so the avx1 version is never offered for download.
Is that the case for a reason? Why not add those cpus in the list?
There is no AVX1 version on GitHub for Credits. There is an AVX2 optimised binary that Wolf0 did the optimisations for in the code. There are no AVX optimised binaries. The standard binaries are compatible with all 64-bit CPUs.