HP workstations z800

[Saysengte]

My HP workstation z800 startup problem .... When I start power on the machine it have higher fan speed, and the monitor not show any thing I keep it for a few min but still the same ( for my note when the system work first fan got higher fan speed then slower down so the system working fine) .... So I try to remove and replace the ram it working but when I try to on off or keep it a few hour it not working again. After that I try to crtl +alt+delete then system run it the highest fan speed and the system not work again.

What problem with this place help me
Is this CPU , RAm ,or Bios ? Or other
CPU doul x5670 (update)
Ram micron DDR3 10600r 4GB *6 (update)
VGA Quadro 3800

[DGroves]

this may or may not be helpfull, but when the system acts like that it's usually down to two the first things listed below

1. failing power supply,.... the stock 850 watt supply is known to have a higher than normal failure rate when it's over 5 years old (this does not apply to the optional 1250 watt unit but can still be the cause)

2. failing part on the motherboard,  recomended solution is board replacement. however if you have a really good repair shop that can do surface mount replacement AND you can id the failing part this might be worth doing

3. failing CPU, this is unlikely but remotely possible

Ram,video card, other pci-e cards, Hard Drives will not cause the issue you are describing

if you resolve this please post back so others can benefit.

[Saysengte]

is this  not the problem that i update CPU with Doul X5670 install in as#460838-002 ??? i just found some information that  as#460838-002 not support for x56xx only as#460838-003 that is true ? but i bios had been update successfull.  after i got solve above i found that all my CPU x5670 and Ram DDR3 ECC 4GB*6 are good coz i had been test with CPU1 slot and full ram slot on cpu1 ready it work well .... but when i install doul x5670 and cpu1 3 of ram and cpu2 3 of ram by the spec and the way to install it work only the frist power on after that still got the higher fan speed sound i think it is come from the cpu fan , my cpu1 goting hoter then cpu2 it is the normal process? .... then when i try to take out the ram just keep cpu1 1ram and cpu2 1ram it can power again after i restart some time working some time not .... now i think it is the power suppy ? or my CPU update problem ? .... if power supply problem can i replace with z820 or z840 powersupply ?

Thank you for your help   

[DGroves · Accepted solution]

when posting a help request, leaving out critical information such as

(i just upgraded my cpu's to 56xx and now system will not boot)

and just saying my system will no longer boot, makes trying to resolve your problem  much much harder!!!

in the future please think before posting and see if you can post a request that containns the needed information

you need a 003 revision to be able to run the 56xx series xeons, while the 001/002 motherboards may be able to boot with one 56xx cpu (or not, it's a crap shoot) trying to run dual 56xx on a non 003 board usually will not work

the 003 motherboards have a diffrent revision chip on the motherboard which allows proper operation with 56xx cpu's