Quartus II Subscription Edition Download v8.1
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Download Quartus II Subscription Edition v8.1 with Altera Installer (Beta)
Benefit: Reduce your download files size by up to 50%. Download faster by selecting only the software and files you need. Give the new feature (beta version) a try today.
All-in-One Software Download
Individual Software Downloads
v9.0 beta available for Arria® II GX & Stratix® IV GT FPGAs
| Windows Software Downloads | Download | File Size |
|---|---|---|
| Quartus II Subscription Edition software v8.1 (Includes MegaCore IP Library) Windows Vista (32/64-bit), and Windows XP (32/64-bit) |
1.97 GB | |
| Nios II Embedded Design Suite (1) Windows XP (32-bit), and Windows Vista (32-bit) |
598 MB | |
| ModelSim-Altera Edition v6.3g for Quartus II v8.1 Windows XP |
276 MB | |
| Linux Software Downloads | ||
| Quartus II Subscription Edition Software v8.1 (Includes MegaCore IP Library) Red Hat Linux Enterprise 4/5 (32/64 bit), SUSE Linux Enterprise 9 (32/64-bit) and CentOS 4/5 (32/64 bit) |
2.45 GB | |
| Altera Install Script for Linux Installation v8.1 Recommended when installing multiple software programs (see details) |
1 MB | |
| Nios II Embedded Design Suite (1) Red Hat Linux Enterprise 4/5, SUSE Linux Enterprise 9 (32/64-bit) |
687 MB | |
| ModelSim-Altera Edition v6.3g for Quartus II v8.1 Red Hat Linux Enterprise 4/5, SUSE Linux Enterprise 9 (32/64-bit) |
272 MB |
- To use the Nios II Processor Embedded Design Suite (EDS), you must first install Quartus II software.
Recommended Linux Download and Installation Instructions:
- Download the desired components. Other components (Nios II EDS, MegaCore IP Library, and ModelSim-Altera software) can be downloaded as well.
- Ensure there is sufficient free disk space to contain copies of the uncompressed versions of these files.
- Extract the Quartus II Linux software using the following command:
tar xvf 81_quartus_linux.tar - Execute the 'quartus/linux/install' script (extracted relative to the current directory).
- Follow the same procedure for each additional component (Nios II EDS, intellectual property, and ModelSim software), making sure to target the same base installation directory (e.g. /usr2/altera) so that each tool is at the same relative location.
System Requirements
| Requirement | Type |
|---|---|
| Operating System | Windows Vista (32-bit and 64-bit) |
| Disk Space | A full installation of the Altera Complete Design Suite version 8.1 requires approximately 6.5 GB of available disk space on the drive or partition where you are installing the Altera Complete Design Suite and approximately 30 MB of available space on the drive that contains your TEMP directory (Windows only). |
Download Notes
- Support—If you have a question or problem that is not answered by the information provided here, contact Altera Applications through the mySupport website.
- Legal Notice—The Altera Software Subscription License Agreement governs the installation and use of this software.

