CMS 4GB (2X2GB) DDR2 4200 533MHZ NON ECC DIMM Memory Ram Upgrade Compatible with Dell® Dimension 9100 Series Desktop - A86 - Newegg.com
Dell N375P-00 - 375W Power Supply for Precision 380 390 T3400 Dimension E520 E521 XPS 410 420 430 - CPU Medics
H305P-00 Dell Power Supply - directmacro.com
Solved: Dimension e520 ATX Mobo Hack - Dell Community
Dell Dimension E520 Motherboard for sale | eBay
Dimension E520 Part 3 - upgrades and new home - YouTube
Dell Dimension E520 Motherboard WG864 + Core 2 Duo E6400 2.13GHz CPU + 1GB RAM - The620Guy.com
Dell Dimension E520 never cleaned since new in 2006. This computer has taken so much abuse from angry children and it just keeps running. Not perfectly cleaned but a big improvement. :