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Celeron Processor compatibility

By rstretch ·
I want to upgrade a 566MHZ processor in an HP Pavilion 6645C to a 1G processor. The part numbers are followed by a code that I believe is a reference to the chip or board architecture. The processors under 600MHZ use a code 'PPPG while higher units show 'FCPPG'. The latest Celeron processors show 'Tualatin' and I was able to determine that this is not compatible to the older board. I went to Intel's website and did not find the answer. Can I make the upgrade with a processor that is 'FCPPG'?

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Celeron Processor compatibility

by TheChas In reply to Celeron Processor compati ...

First, what socket does your motherboard have?
I suspect socket 370.
Is the 1GHz socket 370, or 423?
If socket 423, it won't physically fit on your board.

Next, you need to check your motherboard manufactures web site.
What you are looking for is BIOS upgrades and CPU compatability lists.

Your motherboard likely does not support the 1GHz CPU for a number of reasons.
Not the least of which are bus speeds and multipliers.
All Celeron CPUs below 850MHz used a 66MHz front side bus.

Also, all things being equal, doubleing the CPU speed will at best get you a 25% performance improvement.

Once your CPU is running at 5 - 6 times bus speed, having a faster CPU mainly increases CPU idle time. Unless you are running a CADD workstation or other applications that are very CPU intensive, you see very little overal performance improvement with a faster CPU.

I recommend upgrading to a motherboard that has DDR RAM, and ATA133 support. Then, you will see a major performance difference between a 533 and a 1GHz CPU.

Chas

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Celeron Processor compatibility

by rstretch In reply to Celeron Processor compati ...

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Celeron Processor compatibility

by D_V Ant In reply to Celeron Processor compati ...

The main difference between the PPG and FCPPG is the location of the processor chip on the package. The older PPG processors had the chip on the underside of the package (towards the systemboard). The newer FCPPG (FC stands for flipped chip) has theprocessor chip on the top of the package. This allows for better heat dissipation since the heat sink can come in direct contact with the processor chip. Other than that distinction, everthing the Chas said still holds true. You will want to verify with HP whether or not your system will support the faster processor.

(An aside to Chas, ALL celerons and PIII's are socket 370 now. Only the P4 is available in the newer sockets.)

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Celeron Processor compatibility

by rstretch In reply to Celeron Processor compati ...

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by rstretch In reply to Celeron Processor compati ...

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