Presario SR1034NX / SR1034NX-B 512MB PC3200 DDR Memory Compaq Presario SR1034NX / SR1034NX-B RAM -512mb 64x64 400MHz DDR SDRAM PC3200 184p DIMM 2.5v CL=3. Price for single unit most machines require this memory installed in pairs.For a kit Please buy and install 2pcs.