Simpler Navigation for Servers and Operating Systems
Completed: a much simpler Servers and Operating Systems section of the Community. We combined many of the older boards, so you won't have to click through so many levels to get at the information you need. Check the consolidated boards here as many sub-forums are now single boards.
HP 9000 and HP e3000 Servers
cancel
Showing results for 
Search instead for 
Did you mean: 

PA-8800 and PA-8900 in the same machine?

SOLVED
Go to solution
Janne_5
Advisor

PA-8800 and PA-8900 in the same machine?

Need to upgrade with additional cpu and found a spare but it's not the same type.

Do you know if it is supported to run 1GHz PA-8800 and PA-8900 cpu's in a rp4400 at the same time?
5 REPLIES
Torsten.
Acclaimed Contributor
Solution

Re: PA-8800 and PA-8900 in the same machine?

Not supported.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
cnb
Honored Contributor

Re: PA-8800 and PA-8900 in the same machine?

Use the Qucikspec, Service Guide or Partsurfer to find the correct CPU option and procedures for your system:

http://h18000.www1.hp.com/products/quickspecs/12034_div/12034_div.HTML

http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01404131/c01404131.pdf

Rgds,
Robert_Jewell
Honored Contributor

Re: PA-8800 and PA-8900 in the same machine?

And here's another little tidbit:

If you install the PA-8900 in this server type, the system firmware will "flip a bit" to address the PA-8900 CPU type. Things will work fine. However, you cannot just go back and install the PA-8800 CPU if you need to as this "bit flip" is persistant and the system will not boot up due to the now incompatible CPU.

-Bob
----------------
Was this helpful? Like this post by giving me a thumbs up below!
Torsten.
Acclaimed Contributor

Re: PA-8800 and PA-8900 in the same machine?

Yes Robert, I think I remember this. Once PA8900 CPUs are installed, you cannot "go back" to PA8800 so easily.

However, it is still a fact you cannot mix the CPUs.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
Janne Paul
Occasional Visitor

Re: PA-8800 and PA-8900 in the same machine?

Interesting... That was good to know as one of my options was to shift cpu:s between machines. But that's not possible anymore when I know PA8800 will not work in the original PA8900 machine.
Thanks Bob!