almost definitely a new cpu i received back as when i opened it originally i sliced through the label end of the box , the new cpu came with a box with a solid label on it . cpu looked new but could have just been wiped well with isopropyl alcohol. When i rang originally , they said that if it was mobo they’d have an issue as they didn’t have any in stock. memory controller is on the cpu in te skylakes though isn’t it so could have been that part of the cpu playing up.
