Dimension 1100 CPU Upgrade

iainbinnie

The Dimension 1100, does not support any Dual core processors, only Socket 478 Single core.

Any Socket 478 Northwood or Prescott P-4 processor, should work in the B110/1100, with an FSB specification up to 800 MHz.

The maximum is a 3.06GHz.

The B110/1100 also, supports Hyper-Threading technology, P-4 processors.

The maximum Socket 478 Celeron-D supported is the 3.2 GHz.

 Note: Upgrade the BIOS to the latest version A01 prior to installing processor.     

Bev.

iainbinnie

The processor should be fine.

There are no specifications for the heatsink available.

It is a Dell proprietary passive heatsink, as is the motherboard retention bracket and case cooling fan.

The B110/1100 Service Manual is HERE

Bev.

Hi Iain,

I know its been a few months but just wondering if you can confirm if the CPU upgrade went OK. I'm just in the same situation now myself and found this thread.

Any hints/tips for what should be done prior to upgrade ?

Thanks,

G.

Hey mate,

went well, heatsink was up to the task. I ended upgrading the ram, CPU and graphics card. The graphics was the biggest challenge, finding a decent card that could operate on that motherboard wasnt easy. Only other tip is to watch a video on youtube on how to apply thermal paste to the cpu, you will need to do that when you install the new CPU (and take the old paste off the heatsink when you remove iit)

Followup:  The BIOS actually says that the processor will run at reduced speed.  And it does.  :-)

"Any Socket 478 Northwood or Prescott P-4 processor, should work in the B110/1100, with an FSB specification up to 800 MHz.

The maximum is a 3.6GHz."

I disagree.  I put an SL7B8 (3.2 GHz Prescott P4 at 800) into a Dimension 1100 and at bootup, the BIOS says "This processor is not supported by this motherboard" or something like that, and it runs at 199.5 x 14, or 2793 MHz according to CPUID.  (I know that 199.5 is close to 200 which is the "same" as the 800 FSB.)  But the multiplier should be 16, not 14.

I can't find any real specs on what the 1100 will support.  The motherboard model is 0WF887.  There is only one BIOS for this computer, A01, according to Dell's driver download site.  

Hello, I too am having a similar problem with my Dell Demension 1100 system. I recently upgraded from the factory Intel Celeron CPU to a Pentium 4 3.20GHz 478 socket CPU. When I startup my system I receive the following error: Alert! the processor is not supported on this system and will run at a reduced speed. Hit F1 to continue, Hit F2 for setup utility.

If I hit F1, my system starts up as nothing is wrong. Its faster than the original processor but when I check my computer properties (via start menu) It says I have Pentium 4 HT CPU 3.20GHz 2.79GHz. The actual processor specification is Pentium 4 HT 3.20GHz 800MHz 1MB Socket 478 CPU. According to the factory Manual, found here

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 it says that I can run a 3.20GHz pentium 4 HT 800MHz FSB processor. I am not sure if my P4 HT CPU is a FSB CPU, how can I tell the difference? If it is FSB, then how can I get my machine to utilize the full potential of the processor and not reduce speed?? Thanks

The 1100 uses a near-standard micro-ATX mainboard like the 3000, with the non-standard part being the front audio socket. (Some Soundblaster cards support it.) Since third-party suppliers like Precision-PC have mapped the pin assignments, it's possible for a DIY-er to replace the socket with a standard one from the likes of FrontX.

Same exact problem guys.  Very disappointing to see that the 3.2 GHz 1M 800 Prescott I just bought will only run reduced at 2.79 GHz.  What the heck is going on here and why is this happening?  According to SpeedStep's listwe can only go up to 3.06 GHz 533 MHz and 512 KB?  Is that right?  And if it is then why on the B110/1100 Technical Specifications 

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page does it say we can use a Pentium 4 800MHz FSB processor with HT?