I bought these Sticks for PC Build but ended up gong with DDR5, so these were never needed, or used. They re in perfect condition.About this itemPlug-and-play high performance. Downclock capable for systems that only support 3000MT/s or 2666MT/sUniversal compatibility. Compatible with 8th–13th Gen Intel Core or AMD Ryzen 1000–5000 Series desktop CPUsSupports Intel XMP 2.0 to recover memory speed if the CPU suppresses it in 4 DIMM configurationsGame at higher frame rates, multitask better, enhance productivity, save time and moneyECC type = non-ECC, form factor = UDIMM, pin count = 288-pin, PC speed = PC5-25600, voltage = 1.2V, rank and configuration = 2Rx8 or 1Rx8