Dell Optiplex 390, is there supposed to be a heat sink there? Even one of these boards on eBay was selling used without one. What's the part number/where can I find it? :
Optiplex-790 Reference Guide En-Us | PDF | Advanced Micro Devices | Ibm Pc Compatibles
Dell OptiPlex 390 download instruction manual pdf
User manual Dell OptiPlex 7000 Micro (English - 76 pages)