Mike,
prime 95 is not as heavy hitting (stress testing) as Sandra that's the biggest reason
prime 95 will wear out your video card but note stress other areas much
ChefMike,
we do a minimum over night burn in.. well moer actually let me splain..
ok systems are built outside the case first
memtest 3 full runs 32-64gig ram that takes a long time. (a whole day)
then windows gets installed updated most tweaks down.
then an over night burn-in with Sisoft testing all memory tests, all CPU tests nothing else.
then it gets benchmarked ram, cpu, hdds to be sure all is where it should be. and yes we do find weak items (hdds, ram)
then and only then is it cased..
then it goes to a different area where those guys install software/hardware for audio/video and do more tweaks, benchmarks for chosen software/hardware.
then its burned in again with si-soft.
now here is the kicker, a system can pass all this and then have issues right at the end. and you can only scratch your head as to why..
many a stick of ram replaced at this point.. and then we have to hold it for a few more days and try to wear it out.
nothing worse than spending all that money for a new shiny system to have it BSOD on you the first few days you have it...
or me having to pay shipping back and forth to fix it..
thus the absurd amount of testing