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HP Z420 bios setup

HP Recommended
z420 recycled
Microsoft Windows 7 (64-bit)

SO I been going through the bios and some of the stuff is new to me from my pavilion elite from 2009.  Is there a file that can explain the best and optimal setup and explain how to make the changes?  I know the newer bios are GUI but I would like to know the functions., normally there is a dialog box that explains it but not in this one..  Thank you all for your help

Above The Firehouse
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Use the link below to take you to the HP Z420 user guides; 


You want the fourth document from the bottom;

 HP Z220 SFF, Z220 CMT, Z420, Z620, and Z820 Workstations Maintenance and Service Guide



From  page 43 you should find the info you're after.




HP Z620 - Liquid Cooled E5-1680v2 @4.7GHz / 64GB Hynix PC3-14900R 1866MHz / GTX1080Ti FE 11GB / Quadro P2000 5GB / Samsung 256GB PCIe M.2 256GB AHCI / Passmark 9.0 Rating = 7147 / CPU 17461 / 2D 1019 / 3D 14464 / Mem 3153 / Disk 15451 / Single Threaded 2551
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