You’re developing in-house Office solutions like add-ins or document-level customization. You’re working with files over 2 GB in Project, especially if the project has many sub-projects. The 64-bit version of Office may be better suited to handle these complex slide decks. You’re working with extremely large pictures, videos, or animations in PowerPoint. See Excel specifications and limits, Data Model specification and limits, and Memory usage in the 32-bit edition of Excel. The 64-bit version of Office may perform better in these cases. You’re working with large data sets, like enterprise-scale Excel workbooks with complex calculations, many pivot tables, data connections to external databases, Power Pivot, 3D Map, Power View, or Get & Transform. Therefore, if your scenarios include large files and/or working with large data sets and your computer is running 64-bit version of Windows, 64-bit is the right choice when: Also, 64-bit applications can access more memory than 32-bit applications (up to 18.4 million Petabytes). Reasons to choose the 64-bit versionĬomputers running 64-bit versions of Windows generally have more resources such as processing power and memory, than their 32-bit predecessors.

If you're still not sure which version, 32-bit or 64-bit is a better choice for you, see the section below. See “Office (64-bit or 32-bit) couldn’t be installed” error. The same is true if you installed the 32-bit version, but want to install the 64-bit version. Important: If you install the 64-bit version, but want the 32-bit version instead, you must first uninstall the 64-bit version before installing the 32-bit version.

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