小的不材，敢問UTT/ETT何意??
自問自答...
剛剛google到.
In terms of quality right out of the box the ETT modules are the best since the DRAM was tested and passed. Next would be the UTT modules that have a full data sheet, but have never been tested. Downgraded DRAM would be the least desired of the bunch as it is fallout memory that did not pass testing and does not have a full data sheet.
因此..
UTT/ETT 是英文 Untested/Effectively tested的英文縮寫，表示未完全測試和有效測試的顆粒，一般打上各大品牌LOGO的內存顆粒都是完全經過完全測試合格的，而有些未完全測試是測試不很合格的顆粒則成為UTT/ETT顆粒，而由這些顆粒做成的內存條就是白牌(white brand)。