The time is 1800 UTC, so 2pm EDT / 11am PDT
Kaivax just posted it as well: https://us.forums.blizzard.com/en/wow/t/wow-classic-pre-launch-test-11-00-a-m-pdt-august-8-and-minimum-specs/239621
Minimum requirements: Core 2 Duo E6600
I'm still using the same motherboard from when I played vanilla back in 2006. An Abit AB9 QuadGT. The original CPU was a core 2 E6600, but I recently upgraded with a Core 2 Extreme QX6850 that I got off ebay for $9. Really squeaking over the minimum requirements here
Probably the only person with a QX6850 CPU with 8GB RAM and a GTX980ti, lol. I even have modern CPUs and motherboards laying around I could use, but I'm trying to see just how long a motherboard and CPU from 2006 can last me. Going 13+ years strong at this point.