About adobe photoshop cs5.1 extended :
Both Adobe Photoshop CS5.1 and Adobe Photoshop CS5.1 Extended have the option to run natively in either 32-bit or 64-bit editions of Windows® Vista® Home Premium, Business, Ultimate, or Enterprise with Service Pack 2, Windows® 7 or Macintosh OSX v10.5.7 - 10.6.2.
Macintosh 64-bit
Photoshop will automatically detect and run the 64-bit version on 64-bit Macintosh systems. To force Photoshop to launch the 32-bit version, navigate to the application and "Get Info" (Control + Click on the application icon), then select the "Open in 32-bit mode" checkbox.
Microsoft® Vista® or Windows 7
Photoshop will automatically install the 32-bit version of Photoshop CS5.1 if you are on a 32-bit Windows OS. Photoshop will install both the 32-bit and 64-bit versions of Photoshop on 64-bit systems. To install only the Photoshop 64-bit version on a 64-bit Windows OS, follow the steps below:
1. Run the Photoshop CS5.1 installer.
2. Enter your serial number. Click Accept.
3. On the right side of the Options panel under the 64-bit heading, uncheck the box for Adobe Photoshop CS5.1. Leave the "Adobe Photoshop CS5.1 (64-bit)" option checked.
4. Finish installation
Minimum system requirements:
Windows®:
• 2GHz or faster processor*
• Microsoft® Windows® XP with Service Pack 3, Windows® Vista® Home Premium, Business, Ultimate, or Enterprise with Service Pack 2, Windows® Vista® 64-bit or Windows® 7
• 1GB of RAM or more recommended
• 1GB of available hard-disk space for installation; additional free space required during installation (Photoshop CS5.1 cannot be installed on flash-based storage devices.)
• 1,024x768 display (1,280x800 recommended) with qualified hardware-accelerated OpenGL® graphics card, 16-bit color and 256MB VRAM
• DVD-ROM drive
• Some 3D features in Adobe Photoshop Extended require an OpenGL 2.0 capable graphics card with at least 256MB of VRAM (512MB VRAM is recommended)
• Shader Model 3.0
• Some features in Bridge rely on DirectX9 capable graphics card with at least 128MB of VRAM
• QuickTime 7.4.5 required for multimedia features
• Broadband Internet connection required for online services
*SSE2-enabled processor required for AMD systems
Mac OS X:
• Multicore Intel® processor
• Mac OS X v10.5.7 minimum is required; Mac OS v10.6.2 is recommended; 32-bit and 64-bit systems (You may need to run 32-bit in order to run 32-bit only plug-ins.)
• 1GB of RAM or more recommended
• 2GB of available hard-disk space for installation; additional hard-disk space required during installation (Photoshop CS5.1 cannot be installed on a volume that uses a case-sensitive file system or on flash-based storage devices.)
• 1,024x768 display (1,280x800 recommended) with qualified hardware-accelerated OpenGL® graphics care, 16-bit color and 256MB VRAM
• DVD-ROM drive
• Some 3D features in Adobe Photoshop Extended require an OpenGL 2.0 capable graphics card with at least 256MB of VRAM (512MB VRAM is recommended)
• Shader Model 3.0
• QuickTime 7.4.5 required for multimedia features
• Broadband Internet connection required for online services
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