2 ms·

Very interesting topic, but rather low on detail --- really wanted to see what those 60 lines of Asm that allegedly show a faulty CPU instruction were, and also

Very interesting topic, but rather low on detail --- really wanted to see what those 60 lines of Asm that allegedly show a faulty CPU instruction were, and also surprised that it wasn't intermittent; in my experience, CPU problems usually are intermittent and heavily dependent upon prior state, and manually stepping through with a debugger has never shown the "1+1=3" type of situation they claim. That said, I wonder if LINPACK'ing would've found it, as that is known to be a very powerful stress-test with divisive opinions among the overclocking community; some, including me, claim that a system can never be considered stable it if fails LINPACK since that is essentially showing intermittent "1+1=3" behaviour, while others are fine with "occasional" discrepancies in its output since the system otherwise appears to be stable.

thfuran 3y ago
>while others are fine with "occasional" discrepancies I guess I'd probably be okay with that if the only thing I ever used the computer for was gaming.
jorticka 3y ago
Like all stress tests, linpack will find some errors, but not all. I had memory stability issues which would immediatly show under Prime95 (less than 1 minute) but pass hours of Linpack.
- sirlancer 3y ago
  Prime95 is my gold standard for CPU and memory testing. Everything from desktops to HPC and clustered filesystems get a 24 hour “blend” of tests. If that passes without any instability or bit flips then we’re ready for production.
  - c0l0 3y ago
    In my experience, LINPACK (at least the Intel MKL on GenuineIntel combination) is both quicker and more thorough in finding setups that are not actually stable/reliable.