2GB KIT 2x 1GB For HP-Compaq Workstation Series xw4200 xw4300 xw4300/CT xw4400 xw4550 DIMM DDR2 ECC Unbuffered PC2-5300 667MHz Single Rank RAM Memory Genuine A-Tech Brand<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>2GB KIT (2 x 1GB) DIMM DDR2 ECC Unbuffered PC2-5300 667MHz Single Rank RAM Memory</li><li>Genuine A-Tech Memory</li><li>Lifetime Warranty</li><li>Toll Free Technical Support 1-866-557-4527</li><li>Designed For HP-Compaq Workstation Series. (See Compatibility List Below)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51jnEUo1ySL.jpg" noproxy>