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HP xw4550 Workstation- models
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At a glance
PW428EA KK501EA KK960AW PW431EA PW447EA
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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 2.40 GHz 2.80 GHz Processor speed
Cache external 1MB L2 cache 2 MB L2 cache 1MB L2 cache 1MB L2 cache 1 MB 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 16X DVD+/-RW SuperMulti DVD+/-RW 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's WEEE registration number is WEE/EJ0076US This means that HP is a registered producer under the Waste Electrical and Electronic Equipment Regulations 2007. Read more about recycling your old IT equipment

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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