No, he said smallest ATX case. Big difference. Many ppl assume they need full towers and 850w psus to run a gtx1060 build, since obviously more power is a better psu. See it every day. Doesn't make it right, just means their 'friends' are not accurate. If op has mATX motherboard, and typically the Riotoro are South American and op's current case is ATX, it's possible that that's what is the assumption to be replaced.