Safe to try CPU or not ?

Patrick70

Junior Member
Jul 26, 2005
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Here is the story.

I installed 4 DDR400 dimms (Kingston value) into an ASUS P4P800 motherboard.
Something went horribly wrong (still not sure exactly) - but after I plugged in the powercord and restarted the PC - I smelled a burning odor - and the computer didn't boot. I quickly unplugged the PC but it was too late. Putting in my old memory dimm I couldn't get the computer to boot at all.

So, I took the motherboard, ram and CPU to a shop here to see if they could tell me what was dead. I assumed the motherboard and memory would be gone but was hoping the CPU was still alright. They never actually tested the motherboard - but they did test the memory dimms (all but one of the 4 Kingston DIMMs was dead) and the CPU ( a P4 Socket 478 2.8C) - the CPU posted but that was all they tested for - I assume they didn't have a testing machine loaded with an OS to see if it would boot up.

They told me that because the motherboard was fried (not really verified I suppose but it wouldn't boot with the old good memory and there was that awful burning smell - which mainly I think came from the DIMMS but anyway) - that I shouldn't trust this CPU either - and recommended I get a new CPU.

However, socket 478 motherboards are getting rare - and it is hard to find computer hardware locally where I live. I did manage to get a new ESC socket 478 board - and the only socket 478 chip I could locate was a Celeron 2.1 Ghz. I wanted to find something that weekend because I need the computer up and running as soon as possible.

Now the question (long winded eh :) - if the old P4 2.8C CPU posted is it safe to try it on this new motherboard. I am afraid it will fry it - if it defective (keep in mind a good board with this CPU posted). I have gotten many conflicting results on this - some computer shops just say go for it - no risk. Others say I would just write that CPU off as bad. So my question is what do you think the likelyhood is that the old CPU would fry this new motherboard if I tried it out. If I got it to boot up with the old CPU I would run Prime on it for several hours to see if it is flakey. Most have told me that CPUs tend either to work 100% or not at all. There are no hotspots or burn marks on the CPU at all.

Would love to get some opinions from the experts on this one.

Patrick


 

bendixG15

Diamond Member
Mar 9, 2001
3,483
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In my experience, a dead CPU will not injure the mobo or anything else,
it will just not work.....

I have put many dead CPUs in mobo and that is what happened.....nothing.

Good Luck.....
 

sieistganzfett

Senior member
Mar 2, 2005
588
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if a cpu were to kill a mobo, it would do it instantly, but this case is very very very, well rare. since it posted, i would think ts good, but what ever you do, get memtest running for hours and see if it works, and run something like prime95 or what ever to stress the cpu and crash it if there are any problems, thats the only way you will know if its 100% ok, but it posted, so its usually going to be fine. if you are in the position to replace several parts, as it seems, you might opt to pay for ddr2, lga 775, etc.