8GB STICK For Sony Vaio VPC Series VPCSA20GD VPCSA21GX VPCSA22GX VPCSA23GW VPCSA23GX VPCSA24GX VPCSA25GG VPCSA25GX VPCSA28GA VPCSA290S VPCSA290X VPCSA2BGX VPCSA2C5E VPCSA2CFX VPCSA2DGX VPCSA2EGX VPCSA2FGX VPCSA2GGX VPCSA2HGX VPCSA2SGX VPCSA31FX VPCSA31GS VPCSA31GX VPCSA33GS VPCSA35GG VPCSA390X (CTO) VPCSA3AFX VPCSA3AGX VPCSA3BGX VPCSA3CGX VPCSA3DGX VPCSA3SGX VPCSA3T9E VPCSB11FX. SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory. Genuine A-Tech Brand. 8GB STICK SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Sony Vaio VPC Series. (See Compatibility List Below)