MemoryTwo SODIMM slots - NON customer accessible / upgradeable
DDR3L-1600 Dual Channel Support
DDR3L-16009 Single Channel Support
DDR3L-1333 Single Channel Support (DDR3L-1600 downgrade to DDR3L-1333)
Supports up to 8 GB of system RAM in the following configurations:●
2048-MB total system memory (2048×1)●
4096-MB total system memory (4096×1)●
6144-MB total system memory (4096×1) + (2048×1)●
8192-MB total system memory (8192×1)

celkova maximum je 8GB
http://h10032.www1.hp.com/ctg/Manual/c04777516