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PC will not boot up on fitting new cpu

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11 replies

by jpeter.marsh

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I have installed a Celeron 1ghz processor into a Asus TUA 266 board I am running windows XP. hen booting up it just keeps restarting. I have up graded the Bios. I have also installed service pack1. If I set the speed to manual and run the CPu at a slower speed and the bus speed below 100 mhz it will boot up, but system will hang after about 20 minutes of use. Could any one please help with this problem it is driving me insane. I have 160 mbit of memory. Had no problem with my other cpu which was a celeron 600 running at 60mhz. Cheers for any help Peter

11 replies

by thechas

Sounds like you need faster memory.

The slower Celeron CPUs use a 66MHz front side buss. So, the system manufacture most likely installed 66MHz memory.

For the faster buss speed of the new CPU, you need 133MHz RAM.

Caution: Make sure that any new RAM is compatible with your motherboard. Many older motherboards will NOT function with the newest SDRAM DIMM modules.
If you buy your RAM from 1 of the major name brand manufactures, they should exchange it for a different style DIMM if needed.

Chas

by wcp

I wish you had posted why you rejected an answer.
It did not work as suggested? Your posting or comment could be very valuable for troubleshooting to the right direction.

Please do the following.

When did the problem start?
Right after you installed a new CPU.
If yes, replace the CPU with another 1 GHz Celeron.
If no, continue.

When does the computer restart?
During POST?
If yes, you got hardware (HW) problem. Most likely motherboard (MB) or CPU. Need to replace one at a time to find which one is bad. Make sure you disconnect any HW you do not need (for example, NIC, modem, sound, and so on) and test if the computer restarts before replacing MB or CPU.

While or after loading to Windows?
If yes, Windows may have gotten damaged. It could be also HW problem; MB, CPU, or hard drive (HD). Check HD integrity by running a diagnostic test. If you do not have one, download it from the HD manufacturer?s website. If the test passes, run ?CHKDSK /R? without the quotes from Recovery Console. If the computer restarts, clean install Windows (for testing purpose you may want to use a spare HD).If the test fails, replace the HD and clean install Windows.
If the computer still restarts, it?s either MB or CPU. Replace one at a time to find which one is bad.

by wcp

Make sure you set the MB FSB and CPU clock speed to 100MHz in the BIOS.

by jpeter.marsh

Thanks for your help I will try anything once. I have already done a clean install and downloaded all the up dates. But will try again

by sfhsgrad00

Are you certain the board can support the new processor? Also check to see if there is a jumper on the board that needs to be set to accommodate a faster CPU. Some mobo's require not only a BIOS update, but a jumper needs to be switched. Check your MOBO manual.

by jpeter.marsh

I have checked and flashed the Bios and according to Asus it should be good up to 1.3 GHz. I have tried to set the board to manaul and the same thing happens. It looks like a new board!

by thechas

I took a look at the manual from Asus.

Since you have DDR RAM, the memory speed should not be the issue.

Make sure that the CPU select jumpers are set properly for Intel CPUs.

Also, make sure that the CPU core voltage is set correctly.

Beyond that, it is possible that you have a mis-marked CPU.
A number of CPU sellers mark CPUs at the highest frequency that it runs at so that they can charge more for them.

Intel has a CPUID utility that you can download to verify that the CPU is indeed a 1GHz.

Chas

by mastertechphila

Could be that APCI is not set properly in the BIOS. I've seen this many times, especially when working with older motherboards. APCI must be on for computer to boot properly.

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