Dell Precision 490 Desktop User's Guide - Page 120

NOTICE: Before you install new memory modules, download the most recent BIOS for your computer from the Dell Support website at support.dell.com. 2. Remove the computer cover (see Removing the Computer Cover). 3. Rotate the hard-drive carrier out of the computer (see Rotating the Hard-Drive Carrier Out of the Computer). 4. If you are replacing a memory module, see Removing Memory. CAUTION: Fully-buffered memory modules may become very hot during normal operation. Ensure that memory modules have had sufficient time to cool before you touch them. 5. Press out the securing clip at each end of the memory module connector. 1 securing clips (2) 2 memory connector NOTICE: Full-length heat spreaders (FLHS) are required for 667 MHz DIMMs. 6. Align the notch on the bottom of the module with the crossbar in the connector. 1 cutouts (2) 2 memory module 3 notch 4 crossbar NOTICE: To avoid damage to the memory module, press the module straight down into the connector while you apply equal force to each end of the module. 7. Insert the module into the connector until the module snaps into position. If you insert the module correctly, the securing clips snap into the cutouts at each end of the module. 8. Rotate the hard-drive carrier back into place (see Rotating the Hard-Drive Carrier Back into the Computer). 9. Replace the computer cover (see Replacing the Computer Cover). 10. Connect your computer and devices to electrical outlets, and turn them on.