SESX2B3ZBuy4GBMemoryExpansion(2×2GB)X-Option,RoHS:Y511-1151[C]2GBDDR2-667/PC2-53001.5VDIMM,RoHS:Yn/aSESX2C1ZBuy8GBMemoryExpansion(2×4GB)X-Option,RoHS:Y501-7954[C]4GBDDR2-667/PC2-5300DIMM,RoHS:Yn/aSESX2C3ZBuy8GBMemoryExpansion(2×4GB)X-Option,RoHS:Y511-1152[C]4GBDDR2-667/PC2-53001.5VDIMM,RoHS:Yn/a137287262797)