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DGroves
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Link for latest HP Spectre Bios updates (all current systems)

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HP current Spectre Bios update status Link

Please use the link below to see if your system has a new Bios from hp for the "spectre"   Vulnerabilities

 

the HP z820 and other systems  now has a bios update (for the z820 it's v3.92)

 

 

https://support.hp.com/us-en/document/c05869091

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MtothaJ
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As additional information, the bios file for the Z420 v.3.92 contains the following microcodes:

 

¦#¦CPUID¦  Platform ID   ¦Revision¦   Date   ¦Type¦ Size ¦ Offset ¦Last¦
¦1¦306E4¦ED (0,2,3,5,6,7)¦  42C   ¦2018-01-25¦PRD ¦0x3C00¦0x580060¦Yes ¦
¦-+-----+----------------+--------+----------+----+------+--------+----¦
¦2¦206D7¦ 6D (0,2,3,5,6) ¦  713   ¦2018-01-26¦PRD ¦0x4C00¦0x584060¦Yes ¦
¦-+-----+----------------+--------+----------+----+------+--------+----¦
¦3¦206D6¦ 6D (0,2,3,5,6) ¦  61C   ¦2018-01-30¦PRD ¦0x4800¦0x589060¦Yes ¦
¦-+-----+----------------+--------+----------+----+------+--------+----¦
¦4¦206D5¦ 6D (0,2,3,5,6) ¦  513   ¦2011-10-13¦PRD ¦0x4800¦0x58D860¦Yes ¦

 

After you update you can check that the these codes are in fact being used in e.g. SiSoftware Sandra in Processors -> Microcode.

If you are running an Ivy Bridge v2 CPU (306E4) you should see the last three digits as 42C 

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