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Kingston KVR24N17S8/4 ValueRAM 4GB 2400MHz DDR4 Desktop Memory at Amazon.com
QNAP 4GB DDR4-2133MHz SO-DIMM Memory Module [PN: RAM-4GDR4K0-SO-2133] at Amazon.com
4GB DDR4 Memory 2400 MHz SO-DIMM, 204 pin DIMM RAM Upgrade for MINIX NEO J50C-4 Serial Windows Mini PC, Sold by MINIX Technology Limited. at Amazon .com
HP RAM Memory - 4GB - DDR4 SDRAM PC Memory Z9H59AT at Amazon.com