Dell 1GB DDR2 PC2-5300 Unbuffered Module Pins: 240 Voltage: 1.8V Frequency: 667MHz Ranks: 2 Compatible Systems Dell Dimension Dimension 9100 Dimension 9150 Dimension 9200 / 9200C Dimension C521 Dimension E310 / E310n Dimension E520 Dimension E521 Dimension XPS 600 Dimension XPS Gen 5 Dell Dimension XPS XPS 210 XPS 400 XPS 410 XPS 420 XPS 700 XPS 710 / XPS 710 H2C XPS One 20 Dell Inspiron Inspiron 545 Inspiron 545s Inspiron 546 Inspiron 546s Inspiron 518 Inspiron 519 Inspiron 530 Inspiron 530s Inspiron 531 Inspiron 531s Dell OptiPlex Optiplex 320 Optiplex 330 Optiplex 740 Optiplex 745 (Ultra Small Form Factor) Optiplex 745 / 745c OptiPlex 755 (Minitower/Desktop/SFF) Optiplex 755 (Ultra Small Form Factor) Dell OptiPlex GX OptiPlex GX520 OptiPlex GX620 SFF/Desktop/Mini-Tower OptiPlex GX620 Ultra Small Form Factor Dell Precision Precision Workstation 380 Precision Workstation 390 Precision Workstation T3400 Dell Vostro Vostro 200 Mini Tower / Slim Tower Vostro 400 Vostro 410