PC randomly shuts down mid-boot up after changing CPU

[Alois Luong]

Hi,

 

So I'm trying to build a 'rig' out of old/unused part I scavenged. I managed to get a working PC using this (1) motherboard (Gigabyte GA-945GCM-S2C) with this (2) pre-installed CPU (Intel Celeron Processor 430).

I wanted to upgrade this rig to make it a bit faster so I added more ram (which worked fine), then I replaced the CPU with an Intel Pentium 805 SL8ZH (the same one as this (3)). However, we I use this CPU, the PC would shut down mid-boot up (sometimes even seconds after powering it on).

I'm guessing my PSU is fine since it worked with the Celeron. Nonetheless, I still tried switching power outlets and PSU; disconnecting all non-essential components; cleaning all the connections; and applied new thermal paste. But still the problem remains.

Does this mean that the Pentium CPU is defective or is there another issue I've overlooked?

 

EDIT: I think that it's worth mentioning that the CPU is very hot by touch even if it was powered on for only a few seconds. Perhaps a cooling issue?

 

(1) https://www.gigabyte.com/Motherboard/GA-945GCM-S2C-rev-10#ov 

(2) https://ark.intel.com/content/www/us/en/ark/products/29735/intel-celeron-processor-430-512k-cache-1-80-ghz-800-mhz-fsb.html 

(3)https://www.ebay.ie/itm/Intel-Pentium-D-805-LGA-775-CPU-Processor-2-66GHz-2MB-Cache-2C-533MHz-FSB-SL8ZH-/323812818489

[Hold-Ma-Beer]

It might be cooling since it turns off after a few seconds and is very hot to touch... the cpu might have reached its limit temp and forcefully shutted the system doen to avoid meltdown..

[mbntr]

Two things, clear the CMOS, update the BIOS and try to get a better cooling solution... the pentium D is known to be a nuclear power plant, it was known to run HOT (it's basically two prescott pentium 4 cpus)

[Kilrah]

What cooler is installed?

 

Also the mobo may not be capable of delivering enough power to that hungry for the time chip.

 

 

[Alois Luong]

So the cooler I was using was an old, second-hand cooler manufactured by some local company. Probably not good enough for the Pentium. I'll try finding a better one.