Full Details from Amazon.com : http://www.amazon.com/gp/product/B00IWYV2KS?tag=onigi-20
HYS72T512922ER-3.7-B 4GB PC2-4200 DDR2-533 2Rx4 240-pin Registered ECC SDRAM DIMM
HYS72T512922ER-37-B 4GB PC2-4200 DDR2-533 2Rx4 240-pin Registered ECC SDRAM DIMM
Equivalent OEM part number HYS72T512022HR-37-A KVR533D2D4R44G HYS72T512922ER-37-B HYS72T512022ER-37-B M393T5166AZ3-CD5 41Y2722
