NikKTech published a review on the be quiet! Pure Power 12 M 1200W Power Supply Unit
A quote from the article:
Roughly 5 months after the new Pure Power 12 M line of ATX 3.0 & PCIe 5.0 power supply units was announced be quiet! has released an even more powerful 1200W output variant.be quiet! Pure Power 12 M 1200W Power Supply Unit Review