https://community.hpe.com/t5/proliant-servers-ml-dl-sl/processor-upgrades/m-p/2512079#M5363 I don't have a serial number as tag is missing. <BR />I have purchased a processor upgrade from single Pentium pro to dual P2 333 (P/n298046-B32 &amp; 333555-B21), together with a memory upgrade - 2x256 mb, but get the error message - processor can't cache that amount of ram. The processor documentation indicates that 128mb is largest usable Dimm, but Compaq options states 256mb is OK - P/n 271910-001 I have upgraded firmware with SP15911 &amp; sys config utility 143811, still doesn't work, can anyone help please? Sun, 01 Apr 2001 23:00:00 GMT Ayman Altounji 2001-04-01T23:00:00Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/processor-upgrades/m-p/2512079#M5363 I don't have a serial number as tag is missing. <BR />I have purchased a processor upgrade from single Pentium pro to dual P2 333 (P/n298046-B32 &amp; 333555-B21), together with a memory upgrade - 2x256 mb, but get the error message - processor can't cache that amount of ram. The processor documentation indicates that 128mb is largest usable Dimm, but Compaq options states 256mb is OK - P/n 271910-001 I have upgraded firmware with SP15911 &amp; sys config utility 143811, still doesn't work, can anyone help please? Sun, 01 Apr 2001 23:00:00 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/processor-upgrades/m-p/2512079#M5363 Ayman Altounji 2001-04-01T23:00:00Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/processor-upgrades/m-p/2512080#M5364 There are special ROMs on the System I/O Board of the 333MHz model that need to be swapped out with those from the Pentium Pro model. The System I/O Board for the 333MHz and 200MHz ProLiant 2500 servers are identical except for these ROMs Sun, 01 Apr 2001 23:00:01 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/processor-upgrades/m-p/2512080#M5364 Ayman Altounji 2001-04-01T23:00:01Z