PXI-8840 controller also ships with an OS Recovery DVD that allows you to reinstall youroperating system onto your hard drive through an external USB CD/DVD-ROM. For moreinformation about these tools, refer to KnowledgeBase 2ZKC02OK, Hard Drive Recovery andOS Installation for PXI and VXI Controllers, at ni.com/support.Note The hard drive recovery hot key is . To access the hard drive-basedrecovery tool, press and hold when video first appears during the boot process.If you need to recover your factory-installed operating system from a DVD, you can use theincluded OS re-installation DVD with an external USB CD/DVD-ROM drive. Boot the PXIcontroller using the OS re-installation DVD to recover the OS. You also may need to reinstallother software after using the DVD to recover the OS.Note Recovering the OS erases the contents of your hard disk. Back up any filesyou want to keep.Upgrade InformationYou can change the amount of installed RAM on the NI PXI-8840 by upgrading the SO-DIMM.National Instruments offers the following SO-DIMMs for use with the NI PXI-8840 controller.• 1600 MHz DDR3L PC3-12800 4 GB, 512 MB × 64, 1.18 in. max (NI part number782341-4096)• 1600 MHz DDR3L PC3-12800 8 GB, 1024 MB × 64, 1.18 in. max (NI part number783001-8192)Note National Instruments has tested and verified that the DDR3L SO-DIMMs wesell work with the NI PXI-8840 controller. We recommend you purchase yourDDR3L SO-DIMM modules from National Instruments. Other off-the-shelf DDR3LSO-DIMM modules are not guaranteed to work properly.NI PXI-8840 User Manual | © National Instruments | 19Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com