This is memory collected during memory replacement or PC disposal. SK hynix I have confirmed that it works in my environment, but please understand that even if the memory is working, it may not be recognized correctly depending on the compatibility with the motherboard. If it is not recognized in the buyer's environment, please contact me first and return it at the buyer's expense. The purchase price will be refunded upon cancellation of the transaction. Please note that we cannot respond after the "receipt evaluation," so please be sure to contact us before the receipt evaluation.