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At a glance
PW428EA KK501EA KK960AW PW447EA PW431EA
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Operating system installed Genuine Windows Vista® Business 32-bit Genuine Windows Vista® Business with downgrade to Windows XP Professional custom installed Genuine Windows Vista® Business with downgrade to Windows XP Professional custom installed Genuine Windows Vista® Business with downgrade to Windows XP Professional custom installed Genuine Windows Vista® Business with downgrade to Windows XP Professional custom installed Operating system installed
Processor speed 2.20 GHz 2.30 GHz 2.40 GHz 2.80 GHz 2.40 GHz Processor speed
Cache external 1MB L2 cache 2 MB L2 cache 1MB L2 cache 1 MB L2 cache 1MB L2 cache Cache external
Standard memory 2 x 512MB DDR2 2 x 1 GB DDR2 2 x 1024MB DDR2 2 x 512MB DDR2 2 x 512MB DDR2 Standard memory
Internal drives 160 GB 250 GB 250 GB 250 GB 250 GB Internal drives
Optical drives 16X DVD+/-RW SuperMulti 16X DVD+/-RW SuperMulti SATA DVD+/-RW SuperMulti DVD+/-RW 16X DVD+/-RW SuperMulti Optical drives
Flexible disk drive Floppy drive 3.5'' 1.44MB No Floppy Disk Drive Kit No Floppy Disk Drive Kit No Floppy Disk Drive Kit No Floppy Disk Drive Kit Flexible disk drive

Certain Windows Vista product features require advanced or additional hardware. See http://www.microsoft.com/windowsvista/getready/hardwarereqs.mspx and http://www.microsoft.com/windowsvista/getready/capable.mspx for details. Windows Vista Upgrade Advisor can help you determine which features of Windows Vista will run on your computer. To download the tool, visit http://www.windowsvista.com/upgradeadvisor.

HP is committed to providing our customers with information about the chemical substances in our products as needed to comply with legal requirements such as REACH (Regulation EC No 1907/2006 of the European Parliament and the Council). A chemical information report for this product can be found at: www.hp.com/go/reach.


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* Not all Windows Vista™ features are available for use on all Windows Vista Capable PCs. All Windows Vista Capable PCs will run the core experiences of Windows Vista, such as innovations in organizing and finding information, security, and reliability. Some features available in premium editions of Windows Vista -- like the new Windows® Aero™ user interface -- require advanced or additional hardware. Check http://www.windowsvista.com/getready for details.

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