Custom PC freezes then doesnt turn on anymore

March 23, 2011 at 16:56:57
Specs: Windows 7 64 BITS, ASUS M4A78TD-V EVO, AMD Phenom II X4 955BE, 4gb DDR3 1600 dual channel, ATI HD 6870, Zalman 650W (i think, cant remember)
Last month my computer started to freeze randomly (no matter if i was playing a game, or away), and then not turning on after it.

When i try to reboot, the lights go on, the coolers work normal, but it doest ' beep' and turns on.

At first, unplugging the SATA Cables from the HD worked, and the computer turned on again, normal, like it never happened, but it started to freeze more and more. One day i had the computer turned on for 15min when it did.
Then, the cable thing didnt work anymore, so i unplugged the hard drive cables from the motherboard, wich made it work for a few days.

Now, my cousin who was my tech support before i moved 600km away, said on the phone, that once he had a mobo doing that, and updated his bios and it never bothered him anymore.
So i updated the BIOS (Not the latest available, the one right after my version), and it did work.
But only for a day and a half.

If i update my BIOS to the latest, will it work, or is it a hardware thing?

See More: Custom PC freezes then doesnt turn on anymore

Report •

March 23, 2011 at 23:49:04
i doubt its a bios issue, as it was working before.
run a check on all the hard drives, ricght click on the drive/properties and tools, schedule a check on C; and reboot.
check your temps, download speed fan, and cpu-z they will monitor your temps and keep you informed if your overheating.
take out all your memory, brush them clean and then replace 1 stick, run your machine, then try 1 stick at a time to verify if you have a bad stick.
use a can of compressed air and blow out all the fans and heat sink to make sure you are running as cool as you should be.
you could update the bios, its always a little risky, but if you doing correctly you should be ok, however as everything works and you havent added any new hardware, i dont see why it should require it.

i hate computers!
but cant help myself....

Report •

March 24, 2011 at 05:16:16
I would guess you have a defective or underpowered power supply. Post the full model and the ratings off the label.

Report •

March 24, 2011 at 07:47:04
I do have HWMonitor, wich im constantly checking, for my stock cooler was kinda bad, and use to make a lot of noise, so i replaced it with a Zalman CNPS9700 LED, in december, and added four more coolers, two on top (thermaltake v3 has the power supply below), one on the side, and another one in the HDs.
As we talk CPU's runing at 40º-30ºC, so is the video card wich is usually higher.

Also in december i bought the vido card, the power supply, the new coolers, and two new HDs. Only thing old on this computer is the motherboard, processor, and memory.
I just scheduled a check, and will do that and later clean the memories.
So we'll see what happens.

Report •

Related Solutions

March 24, 2011 at 07:52:14
its a zalman ZM600-HP

Report •

March 24, 2011 at 09:28:28
Your power supply has 4 12V rails. This is not ideal.

Each supplies 16A, which is 192watts. This is fudging things because if you look at the total 12V wattage rating it is 504watts. 4 x 192 = 768 watts. So obviously the power supply cannot really supply the rated amps on each 12V rail. In your case it is hard to determine which rail is supplying what.

Your problem may be the graphics card is not getting enough power.

The second link shows the power requirements for your graphics card. Under full load that card draws approx. 20.58A (247 watts/ 12)

Blow out your power supply from both ends and lose the extra fans. They disrupt airflow.

Report •

March 24, 2011 at 18:48:49
If i'm not getting enough power then why it didnt happen when i put it all together? why three months later?

Report •

March 24, 2011 at 23:13:23
Power supply efficiency falls as the temperature of the supply goes up.

That is why I suggested you blow it out from both ends. Add to that the extra fans and anything else you added.

The problem is how to distribute the load over the 4 rails equally.

Report •

March 27, 2011 at 06:46:55
Ok, so heres what happened.

Check Disk took me an entire day, for it froze three times. (Randomly)
When it did finish, worked okay for two whole days.
Then it crashed again while i was working, in the middle of the night.
The next morning i cleaned the memories, switched their places.
That was yesterday and it hasnt crashed so far.

IF it does, i'll just put them in the next slots.

Report •

March 27, 2011 at 06:49:38
When i turned off the extra fans (see if while their were off, computer would freeze), cpu temp went to 50ºC in idle, so i did get a little scared and turned them on again.

I did understand a little bit of what you said about the cables, but i dont understand how it can be the power supply when the check disk "fixes" the problem temporarily.

Report •

March 27, 2011 at 12:18:14
Well, first of all, troubleshooting is not an exact science. If you are running hot at idle then either you may have the wrong HS/fan mounted or it is installed wrong (improper application of thermal compound).

Are you using a micro ATX case? If you have too much crap crammed in the case then it can overheat. What is the system temperature at idle?

Report •

March 27, 2011 at 18:50:32
No, its a Thermaltake V3

And i dont think there's much crap crammed into the case. (bad mobile picture)

With internet, WMP, msn messenger, and a few folders open, its now 42º, and the minimum was a few minutes ago, 40º.

Report •

March 28, 2011 at 04:43:50
OK, I see your problem. Bottom mounted power supply cases are crap. The heat from the power supply rises and the heat from the case is NOT exausted by the power supply as it should.

Case makers should stop producing those pieces of junk.

I suggest you get a case that uses a top mounted power supply. Then install only one large case fan in the rear as high as allowable. Cases with side or top fans just disrupt air flow. Your power supply is probably OK. You will notice that newer power supplies have only ONE large 12V rail. This is because high end graphics cards can't get enough power from one of those rails. Yours is marginal at best. The motherboard supplies the first requirement then each of the card connectors supplies more.

Report •

March 28, 2011 at 09:08:29
And getting a new case will fix my problem, right?

You know, every since your first post at my question, you've been kinda offensive with your words, cause "i have a s---ty supply" then i should throw away "the extra coolers cause they're too much crap" for the heating.
Then, when you see that the power supply is not crap, then my case is "a piece of junk".
All of that didnt even get close to what my problem was, what seems to be kinda solved, so far. You're just using the question to say i have a crappy s---ty piece of junk, not to help me.

Report •

March 28, 2011 at 10:31:27
My exact words from above: "Your power supply has 4 12V rails. This is not ideal."

That doesn't sound offensive to me. Maybe you are sensitive because you didn't do your research before buying things.

If you don't like my advice then don't take it.

The reason why 4-12V rails is not as good as 1-12V rail is this. The rails are dedicated to the various hardware. 1 rail feed the CPU. In your case the specs state each rail is 16A. If say your CPU only need 8A the other 8A is not available to use elsewhere. Same goes for the graphics card. I didn't tell you to buy another power supply did I? I just pointed out "Your power supply has 4 12V rails. This is not ideal."

The issue with the bottom mounted power supply is different all together. The entire design of your case is counter to good case design.

Report •

Ask Question