Need help :( Created 13 years ago2011-02-08 15:02:10 UTC by Saribous

Okay, so I installed my new cpu yesterday and everything seemed to be working just fine. Today when I get home from work and start up my computer, it shuts down after around 10 minutes. I start it once more, thinking that perhaps my new cpu is being overheated. So I run a stresstest, and it shuts down after jus ta few seconds. The temperature of the cpu at the time was 54 degrees celcius.

Now it won't start at all, even when I switch back to my old cpu and fan. Any ideas?

Here's what happens everytime I try to boot it:

switch on the power button on the psu, the green light on the mobo lights up, so my psu isn't completely dead. then i push the power button. The fans start spinning but stop after half a second. No warning beeps or anything.

Any help is much appreciated

Sounds like you potentially killed the CPU with overheating.

Take it all apart. Take a look at the CPU. If there's anything noticeably wrong with it, then that's the culprit.

If it looks fine: Take the CPU out and reseat it. After that, make sure you install the CPU cooler properly this time around, because apparently you didn't the first time.

Also, before you put the cooler back on, make sure you completely get off the old thermal paste and put on a new layer. I'd use an old, clean, t-shirt or clean rag to get it off.
Make sure the new layer is fairly thin. DO NO goop it on there.

Good luck.

EDIT: Apparently you tried the old CPU and I glazed over that. You probably fried the motherboard. Have any friends / old parts with the same socket as your current CPUs?

If not, take your computer apart except for the CPU and a stick of memory. Try to use it. Doesn't work? Try another stick of memory, etc. Go through all your parts to see if it still doesn't work.

If in the end it doesn't work, it's probably the motherboard.

Is the PSU powerful enough for your new CPU?

Ignore the PSU, you need to ensure that your motherboard is supplying enough power to the CPU socket. Last time I upgraded my CPU, I also had to grab a new motherboard because the old one wasn't letting through enough juice.

What model CPU and motherboard do you have?

1. Power supply is not enough

2. Maybe his motherboard burned his CPU. Happened to me 2 times.

Try your old cpu, and supply us with information on CPU model and MB model as Penguinboy said. Also power supply model.

(Motherboard dies too after that - from my experience) (also, no worry they were just an AMD)

3. Just motherboard.

I'm thinking some of you haven't read all that Saribbous wrote.

Now it won't start at all, even when I switch back to my old cpu and fan.

I did miss that. Sounds like the motherboard is fried, in that case.

It would be worth your while to remove everything from the motherboard except the CPU, CPU fan, and RAM and remove the motherboard from the case. Then try starting it out in the open like that. I ended up having a really strange issue once where the motherboard, processor, and everything else worked outside the case. When I installed everything inside the case, one of the standoffs in the case was touching a part of the PCB of the motherboard and shorting some of the leads, causing it to immediately turn off after turning on.

That said, the evidence seems to be pointing to a dead mobo. Hopefully this test will prove that otherwise.

Update!

I got it running again with the new cpu & fan. It was most likely overheating like Luke suggested. Had it running my minecraft server the rest of the night and it peaked at around 50 degrees C with the fan going at just over 2k RPM, so it seems fine now.

My motherboard is an Asus P7H55, which supports core i5. My psu is a corsair with 550W output.

I'm leaning towards;

A) I failed at installing the fan, causing the cpu to overheat, or
B) Short circuit of some kind, like RotatorSplint described.

Anyways, thanks guys for taking the time to reply, it's much appreciated <3

i5 @ 50c?

Thats not good at all. Normal operating temp is around 30 - 35.

A CPU running at 50 degrees is perfectly fine.

at the time the cpu usage was over 75%, is 50c so bad considering the workload?

No, but it could be better. Silicon parts resist to up to 120 degrees, at which point any modern CPU will auto shutdown to prevent temperature damage.

my gpu goes up to 130 degrees when i play bionic commando rearmed, unless i underclock my 9800 gts to the lowest possible clock speeds.. it never shuts off no matter how hot it gets =(

I don't know about GPU, but I know modern CPU auto-declock or shutdown themselves to preveant overheating.
In any case, 130 degrees is very bad and you should consider putting a better cooler on the video card to prevent it from frying.

Also, I hope you understand that I was referring to Celsius degrees.

My old GPU -which had an absolutely abysmal fan- would sometimes reach 80 degrees C. 130 degrees sounds really bad.

Not really, some GPUs go really high, and thats normal. My CPU, overclocked to 3.3GHz (intel i5 750) works @ 32c

My GPU works at 39c normal, 45c when i play buffed up games.

Keep the CPU as cool as possible to insure a long life time.

my gpu goes up to 130 degrees when i play bionic commando rearmed, unless i underclock my 9800 gts to the lowest possible clock speeds.. it never shuts off no matter how hot it gets =(

Celsius? Damn. You need a new cooler.

Indeed. New cooler or new graphics card.

My GPU won't go over 55C and it's an overclocked HD4870 which is one of AMD's most power-hungry. A decent cooler can do wonders.

I've been raping my CPU at something like 70c for three and a half years now. I'm a lazy shit and I built the computer myself with very limited knowledge. The side panel case fan started making annoying noises so I disconnected it, and haven't compensated for it. Computer is still holding me up a bit, with game loading times, but once in, the FPS is damn good, I always assumed I had a bit of a bottleneck because I have 1gb of memory with 1gb of video memory, but who knows, maybe my CPU has been degraded from constant high temps.

My Ati Radeon HD4850 stayed in idle at 80C and probably near 90C when playing graphic intensive games(for over 2 years). I changed the cooler this autumn to an Arctic Cooling and it stays at 36C in idle now.

@up
was that asus 4850?

No, it was Gigabyte. I still have my old configuration on my profile, including a photo with the old look of my GPU. Check it.

I totally missed this thread but it looks like Luke the Duke has already taken care of you. Anything I say now just won't be relevant. lol

I have built most of my systems and never had any of these problems you are all talking about. And what's wrong with AMD? I happen to like AMD products.

Did you actually exchange the chip or get a new one?

And when all else fails put a box fan on it? lol. Don't laugh! I keep my system on 24 hours a day 7 days a week so when I use my computer extensively and it is "warm" in the office I just use a large fan directly on the side of the computer. It really does wonders for the temperature.

I know, I am ghetto.