Dell 512MB DDR2 PC2-6400 Unbuffered Module Pins: 240 Voltage: 1.8V Frequency: 800MHz Ranks: 1 Compatible Systems Dell Dimension Dimension C521 Dimension E521 Dell Dimension XPS XPS 410 XPS 420 XPS 630i XPS One 24 Dell Inspiron Inspiron 535 Inspiron 535s Inspiron 537 Inspiron 537s Inspiron 545 Inspiron 545s Inspiron 546 Inspiron 546s Inspiron 518 Inspiron 519 Inspiron 530 Inspiron 530s Inspiron 531 Inspiron 531s Dell OptiPlex Optiplex 160 Optiplex 330 Optiplex 360 Optiplex 740 Optiplex 745 / 745c OptiPlex 755 (Minitower/Desktop/SFF) Optiplex 755 (Ultra Small Form Factor) OptiPlex 760 MT / DT / SFF OptiPlex 760 Ultra SFF OptiPlex 960 OptiPlex FX160 Dell Precision Precision Workstation T3400 Dell Studio Desktop Studio Desktop Studio Slim Dell Vostro Vostro 200 Mini Tower / Slim Tower Vostro 220 Mini Tower Vostro 220s Slim Tower Vostro 400 Vostro 410 Vostro 420 Tower Vostro A180 Tower XPS 625 Vostro 320