I am also getting the PSOD running on ESXi 5.1 using HP BL490 G6 and BL490 G7 blades. According to this link https://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/psi/topIssuesDisplay/?javax.portlet.endCacheTok=com.vignette.cachetoken&sp4ts.oid=4194641&javax.portlet.prp_efb5c0793523e51970c8fa22b053ce01=wsrp-navigationalState%3DdocId%253Demr_na-c03698772-1%257CdocLocale%253Dde_DE&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.tpst=efb5c0793523e51970c8fa22b053ce01&ac.admitted=1365538253464.876444892.199480143
It does not address the server models I am using. Attached is a screenshot of the PSOD.
***Update ***
It does appear that BL490 G6 and BL 490 G7 are also prone to this issue.