cryptonight algorithm reports insanely high hashrate on compute_1.x

[Zenitur]

There are much of forum threads in the internet, for example: https://monero.stackexchange.com/questions/1445/ccminer-cryptonight-reports-insanely-high-hashrate-on-nvidia-gpu

Ccminer started with the cryptonight algorithm shows a big hashrate, but no results. On compute_20+ it works perfectly.