1 × SK hynix 4 GB 2Rx8 DDR3-1600 / PC3-12800U-11-12-B1 (HMT351U6EFR8C). Compatible with most DDR3 desktop motherboards. All modules are 240-pin UDIMMs, non-ECC, unbuffered. 2 × Samsung 4 GB 2Rx8 DDR3-1600 / PC3-12800 (M378B5273CH0-CK0) — backward compatible with PC3-10600 (1333 MHz).
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