I'm back :

P4 631 - 15x393MHz=5.9GHz -> SPi 1M 22,3s

Time isn't wonderfull - single channel, non-optimalised OS etc. Score on very light (1/4hp) FC with very bad load - need more gas. Idle temp = ~ 0'C

P4 631 - 15x400MHz=6GHz 1.55v -> CPU-Z Verified

I've done 61xx MHz validation, but when I want publish it, I've received error "probleme de taille fichier"

More to come, I promise