Dell OptiPlex 990 (Early 2011) User Manual
System board, Heatsink removal, About warnings
Important Information — Dell OptiPlex 790/990
About Warnings
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
System Board
The Dell OptiPlex 790/ 790 computers are now shipped with a new system board without the following components:
1. Heatsink
2. Power supply thermal sensor (Desktop chassis only)
Heatsink Removal
The following image displays an earlier version of the system board shipped with the heatsink.
Figure 1. System Board of an earlier version of the system board with the heatsink
All system boards shipped with the following BIOS versions or higher will NOT contain the heatsink.
Computer Model
BIOS version
OptiPlex 790/990
A11
If the BIOS is downgraded to an earlier version than the version listed above, an error message will be displayed.
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Regulatory Model: D09M, D05D, D03S, D01U
Regulatory Type: D05D001, D03S001, D01U001
2012 - 04