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03-12-2018 01:42 PM
The HP Z800 BIOS does not detect all the cores of the processor. Of the four, only two cores and four streams are defined. How to fix?
03-12-2018 02:50 PM
first of all what processor model is installed? and do you have one or two cpu sockets filled
you can get the cpu info from right clicking on your desktops computer icon, and selecting "properties"
in the window that pops up you will see a line stating the installed cpu model and how cpu's are installed
once that is known we can help you further
03-12-2018 03:18 PM
the Xeon E5620 is a 4 core with hyperthereading (if enabled in the bios) so task manager should show either 4 or 8 cores
there are no bios options other than hyperthreading which change the installed core count if the cpu you listed is installed then you either have a bad cpu, or a bad cpu socket (socket can have bent pins)
the z800 only has one model, which has had two major motherboard revisions the original board which only supports 55xx xeons and the later v2 boards the support 55xx/56xx cpu's
while some people have made v1 boards run 56xx cpu's
the results vary from working fine to random weirdness to no boot
i mention this just to rule out a 56xx cpu on a rev 1 motherboard
From a post SDH did a while back:
Go into the F10 BIOS BIOS settings, and look at the Boot Block Date in System Information.
If the boot block date is 01/30/2009, the system only supports the Intel 55xx processors.
If the boot block date is 11/10/2009, the system supports both Intel 55xx and 56xx processors.
03-12-2018 03:43 PM
I do not understand :
from fellow BIOS 3.2 the board is working normally. I upgraded to 3.6 and the board does not work nominally!
please try to describe just what you did in terms that a english speaking person can understand
do you mean you flashed bios ver 3.60 (what was the previous bios 3.20?)
i would recomend you power off the system, remove the power cord press the power button for 10 sec then
remove the side panel and press the small white button (near the cmos battery) for 5 sec to do a full cmos reset
after doing a cmos reset reenter the bios and reconfigure any nessary settings and reset the time