We check this website, now pcpartpicker.com is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is pcpartpicker Down Right Now? - NO! pcpartpicker is up!
If you have problem with access to site pcpartpicker, and domain pcpartpicker.com is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).