https://community.hpe.com/t5/proliant-servers-ml-dl-sl/upgrade-from-one-to-two-cpu/m-p/6987357#M159708 <P>The L21 number is used for the 1st CPU when configuring a BTO or CTO system, the B21 is the option number for adding the 2nd CPU. In your case you want to order the B21 part</P><P>&nbsp;</P> Fri, 03 Nov 2017 14:39:48 GMT Jimmy Vance 2017-11-03T14:39:48Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/upgrade-from-one-to-two-cpu/m-p/6987344#M159706 <P>Hello,</P><P>I need to upgrade my server (Proliant DL380p G8) from one CPU sokect used to two.<BR />I have no idea how to find out which CPU is installed on my server in order to know what CPU to choose for second one.<BR />There seams to be two types of CPU:&nbsp; 715222-L21 and 715222-B21 (Intel® Xeon® Processor E5-2609 0 @ 2.40GHz)<BR />So, how do I find out which should I have to choose for the second CPU.</P><P>Thank you.</P> Fri, 03 Nov 2017 13:27:44 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/upgrade-from-one-to-two-cpu/m-p/6987344#M159706 sealview 2017-11-03T13:27:44Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/upgrade-from-one-to-two-cpu/m-p/6987357#M159708 <P>The L21 number is used for the 1st CPU when configuring a BTO or CTO system, the B21 is the option number for adding the 2nd CPU. In your case you want to order the B21 part</P><P>&nbsp;</P> Fri, 03 Nov 2017 14:39:48 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/upgrade-from-one-to-two-cpu/m-p/6987357#M159708 Jimmy Vance 2017-11-03T14:39:48Z