Hardware requirements for running C21

[Customer Service]

21st Century Accounting follows the recommendation for all Windows users: when you buy computer hardware, get as much computing power as you can afford, especially as much memory as possible.

21st Century Accounting itself has a relatively small "footprint" in terms of disk space and memory requirements, but the Windows support for any application is memory-intensive. The more memory your computer has, the more satisfied you will be with the performance of all your applications, including Payroll for Adagio.

Networking performance also profits from additional memory on the computer you use as your Server.


If you already have C21
If you already have C21, and are purchasing a new computer, then be aware that the following information is for version 11 of Pervasive PSQL, the database engine used by the 21st Century Accounting. If you have a different version, check with us about hardware requirements.

Workgroup Edition

Minimum hardware requirement:

CPU: Pentium III, 500 MHz or better Intel-compatible processor
RAM: 335 MB
Disk space: 500 MB
CD-ROM drive
Internet access required for product activation

Supported Operating systems:

Windows 8 (not RT)
Windows 7
Windows Server 2008 R2 SP1 64-bit
Windows Server 2008
Windows Small Business Server 2011
Windows Small Business Server 2008
Windows Server 2003
Windows Vista
Windows XP (with Service Pack 3)
Windows 10 - Must have PSQL version 12 or higher
Windows Server 2016 - Must have PSQL version 12 or higher

Client/Server Edition, SERVER computer

Minimum Hardware Requirement:

Windows 32-bit :

Pentium 4, 1.1GHz
RAM: 1 GB
Disk Space: 500 MB
Windows 64-bit

CPU: Athlon64, Opteron, Xeon, other Intel EM64T
RAM: 2 GB
Disk Space: 500 MB
CD-ROM drive
Internet access required for product activation

Supported Operating Systems:

Windows 8 (not RT)
Windows 7 (not Home Premium)
Windows Server 2008 R2 SP1 64-bit
Windows Server 2008
Windows Small Business Server 2011
Windows Small Business Server 2008
Windows Server 2003
Windows Vista (not Home)
Windows 10 - Must have PSQL version 12 or higher
Windows Server 2016 - Must have PSQL version 12 or higher

Client/Server Edition: CLIENT computer

Minimum Hardware Requirement:

Windows 64-bit

CPU: Athlon64, Opteron, Xeon, other Intel EM64T
RAM: 1 GB
Disk Space: 500 MB
Windows 32-bit

Pentium III, 500 MHz
RAM: 128MB
Disk Space: 250 MB
CD-ROM drive
Internet access recommended
Supported Operating Systems:

Windows 8 (not RT)
Windows 7
Windows Server 2008 R2 SP1 64-bit
Windows Server 2008
Windows Small Business Server 2011
Windows Small Business Server 2008
Windows Server 2003
Windows Vista
Windows XP
Windows 10 - Must have PSQL version 12 or higher
Windows Server 2016 - Must have PSQL version 12 or higher