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Enabling multiprocessor support on a HP xw8400 workstation
Self ^ | 28 March 2012 | Self

Posted on 03/28/2012 3:16:01 PM PDT by MeganC

Hello, I'm looking for some technical help and FR never steers me wrong!

I have an older Hewlett Packard xw8400 workstation that came with one CPU and it is now running 64 bit Windows 7 with the 2010 BIOS update. I've now inherited another 8400 that isn't working and I've transplanted the RAM, a hard drive, and the CPU to my original machine.

The motherboard has two CPU slots and the new CPU fan runs fine in the slot.

But I'm not getting the new CPU to run. I also can't find in the BIOS how to enable multiprocessor support.

Anyone have any advice?

Thank you!


TOPICS: Computers/Internet
KEYWORDS: cpu; hp; xw8400

1 posted on 03/28/2012 3:16:11 PM PDT by MeganC
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To: MeganC

I should say that I used the 2nd hard drive to get the RAID working and it is working just fine.


2 posted on 03/28/2012 3:17:52 PM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: Ernest_at_the_Beach; ShadowAce; martin_fierro

I thought I’d ping the 11 of you.


3 posted on 03/28/2012 3:21:09 PM PDT by SunkenCiv (I come to bury Caesar, not to praise him)
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To: MeganC

M/B jumper settings?


4 posted on 03/28/2012 3:24:35 PM PDT by Paladin2
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To: MeganC
Hi Megan -

HP has the service and technical manuals for all their computers online. I found what I think is the correct manual here. There may be something of use in there.

Also, I am not sure what processor was installed in the computer. If it was a single-core processor, then you will need to reinstall Windows to see the second CPU. Windows has two versions of the 64-bit kernel: a uniprocessor kernel and a multiprocessor kernel. The kernel is selected at install time based on what processor is in the box.

Another thing i would check is that the two CPUs are the same type.

Good luck!

5 posted on 03/28/2012 3:31:04 PM PDT by Scutter
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To: Scutter

Thank you!

The two CPU’s are identical and they are both 4 core processors.

I’ll try reimaging it since there’s nothing on it yet.

Thank you for the advice!


6 posted on 03/28/2012 3:36:47 PM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: Paladin2

I am not sure it applies.


7 posted on 03/28/2012 3:37:55 PM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: MeganC
I found this document that has a brief mention of adding a second processor. This is what it says:

How do I add the second processor to the HP xw6400 and xw8400 Workstations? Is a system board swap required?

CPU upgrades are field and customer installable without system board swaps using the HP xw6400 or HP xw8400 Workstation CPU upgrade kits. The second processor must be the same speed and stepping as the first.


8 posted on 03/28/2012 3:38:11 PM PDT by Scutter
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To: MeganC

Well, you shouldn’t have to reinstall Windows if your original processor was a 4-core. There must be some other issue.


9 posted on 03/28/2012 3:41:53 PM PDT by Scutter
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To: Scutter

I’m wondering if there is something maybe in the BIOS. The stuff online for the 8600 mentions multiprocessor support BIOS settings but the 8400 BIOS doesn’t seem to have the same settings.


10 posted on 03/28/2012 3:46:31 PM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: Scutter

The CPU’s are identical. I checked that first before I installed the 2nd one. Also put on new thermal paste.


11 posted on 03/28/2012 3:47:33 PM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: MeganC

That’s a good theory. Also look and see if there is a jumper located near the second CPU socket. I didn’t see anything relevant in the technical guide, but the HP site might have a user guide that has more info.


12 posted on 03/28/2012 3:52:08 PM PDT by Scutter
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To: MeganC

What version of Win7 are you running? It looks like only some versions of Win7 will support multiple physical processors.


13 posted on 03/28/2012 4:03:36 PM PDT by Future Snake Eater (If we had a President, he'd look like Newt.)
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To: Future Snake Eater

Win 7 Ultimate SP 1


14 posted on 03/28/2012 4:20:56 PM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: Scutter

I’m going with your advice to try reimaging it. We’ll see how that goes. (-:


15 posted on 03/28/2012 4:27:17 PM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: MeganC

Enable SMP in the bios.


16 posted on 03/28/2012 4:33:37 PM PDT by Kirkwood (Zombie Hunter)
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To: Kirkwood

I looked and I’m not seeing SMP as an option.


17 posted on 03/28/2012 4:47:24 PM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: MeganC

How about if you turn *off* hyperthreading?


18 posted on 03/28/2012 5:44:51 PM PDT by VeniVidiVici (The Democrat Ku Klux Klan is alive and well under the banner of diversity and tolerance)
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To: MeganC

Reinstalling Windows isn’t going to help if the BIOS doesn’t see the other CPU.


19 posted on 03/28/2012 6:00:50 PM PDT by Campion ("Social justice" begins in the womb)
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To: MeganC

Just as an aside, you say the second system was not working, do you know what happened to it, and could something have happened to the second processor? As a test, and its risky, but you might be able to get a boot off of the second processor if you install it in the primary slot and remove the original processor. That way you will be able to see if you can get a boot off of it, and you may get more information about it from the bios or others diagnostic software. Just an idea. Of course, if something really bad happened to your second processor, you might actually damage your motherboard by trying the above test. If it was a junker I had laying around, I might try it, but if its your only machine or is needed for a significant reason, I probably wouldn’t try the test above. It all comes down to don’t try it, unless you can afford to lose it.


20 posted on 03/28/2012 11:54:04 PM PDT by krogers58
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To: Scutter

THANK YOU!

Reimaging did the trick! I had it reimaging and all overnight and this morning there are eight cores all up and running!

Thank you so very much!

Megan


21 posted on 03/29/2012 8:40:13 AM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: krogers58

Thank you for the advice but it is up and running now! Much appreciated!


22 posted on 03/29/2012 8:45:25 AM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: MeganC

You’re welcome. Now you just need to decide what to do with all that processor horsepower :)


23 posted on 03/29/2012 6:35:28 PM PDT by Scutter
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To: Scutter

Google Earth is looking AwEsOmE!!!! :)


24 posted on 03/30/2012 10:09:14 AM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: MeganC

8 Cores, or 8 threads?


25 posted on 03/30/2012 10:14:14 AM PDT by jurroppi1
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To: jurroppi1

Two four core Xeon processors.


26 posted on 03/30/2012 10:34:16 AM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: MeganC

Oh, NICE!


27 posted on 03/30/2012 10:35:39 AM PDT by jurroppi1
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To: jurroppi1

It is! I got the first machine for free when a friend gave it to me and then the 2nd machine he gave to me because it didn’t work anymore so I took the RAM, the CPU, the video card, and the BluRay RW out of it and installed it all to my computer. I’m really happy it all works!


28 posted on 03/30/2012 12:34:06 PM PDT by MeganC (No way in Hell am I voting for Mitt Romney. Not now, not ever. Deal with it.)
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To: MeganC

yeah, no doubt! I love it when a plan comes together :)


29 posted on 03/30/2012 8:01:23 PM PDT by jurroppi1
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