[Solved] My pc keep restarting..Plese HELP!!

I am a hardcore gamer.I buy a new pc 3 months ago.I have no AC in my room.
My Rig-Intel C2Q 2.5,Motherboard - Gigabyte EG41MFT-US2H,2GB DDR3 RAM,500GB HDD,Samsund DVD R/W,LCD-Dell 19'',Gigabyte 9600gt PCIe Graphics card.
I encounter first restart problem in first week.But I ignored that.Now the problem is increasing day by day.At first i think that cause of problem is my Graphics card.
I have warranty so they changed my graphics card & give me HD 5670.I was happy for my new graphics card but again it restart next day.Now pleae tell me where is the problem in my PC.Also note that if I run (Playing games)my PC continuously (with a break of 1 hour) I dont't encounter any problem & if i turn off my pc for 4 or 6 hour
the problem start.PLEASE HELP ME!!

Also, you have not posted temperatures.

Use HWMonitor, take a screenshot of all the info after you play a game for a while, and post it:
http://www.cpuid.com/hwmonitor.php

I have download hwmonitor but I can't still run any game because it cause restart.
And note that playin HD movies & songs also cause restart.My avarage temp of 4 cpu is
55C.
How I can post pic here?

I have invite a technician in my house for advise.He carefully check my graphics card &
motherboard.He told me that it might be IC chip in motherboard which cause restart because it heat too much and also said that my HDD make a little unexpected noise.
He said to run my pc a day & inform him about status of my pc.But he can't sure which is the main cause of problem.

I have found a way to start my computer.First I have to unplug my graphics card from motherboard.Then I need to run computer half an hour and then install graphics card on my motherboard.Then i need to run a game or hd movie.That how how my computer start.I can't turn off computer for more then 2 hours because it will cause restart.From yesterday I have played Mirror's edge,Assassin's creed II & singularity without any problem!

BUT DON'T WANT TO USE THIS TRICK AGAIN & AGAIN!!

I agree with temperatures and weak power supply. Never heard of value top. Not a well known brand by any means. I would recommend looking at a new antec or corsair unit. Also, be sure you have enough fans/cooling in the case, as it could be overheating as well.

Yes, you can kill your whole rig if that Power Supply goes out.

Even if you end up having to replace the power supply yourself, I would still upgrade. I've had cheap power supplies kill a motherboard before. It's kinda like playing russian roulette with your system. You may not fry anything, but better safe than sorry.

Nothing reliable and the wattage is not as important as voltage stability and the amount of DC current ripple. If you have a GOOD voltage meter and the knowledge to find and test an active rail while under load without shocking yourself, then yes you can at least find out a little bit, but not all the story.

That paragraph nicely sums up why I promote only good power supplies.

Only if it's a good second hand PSU Warning: Very old power supplies are not intended for modern computers. They make mostly 5V power and modern computers need 12V power mostly. So don't use a PSU older than about 5 years.

And every time the computer just re-starts on it's own? Sounds like a power supply problem to me.

First try this

http://pcsupport.about.com/od/tips [...] estart.htm XP

http://pcsupport.about.com/od/wind [...] dows-7.htm Win7

if it still restarts own then i would agree with it likely being a PSU issue

500w is fine.. but get something 80+ bronze at least.. and ask around about how good a certain company is before you buy.. if you don't like what you hear, find someone else

Just see the PSU guide linked in my signature.

Possibly a bit less power and a bit less heat, resulting in greater PSU stability. It would only be very small changes though.

No, you shouldn't need to change to Win 7 32-bit.

Yes, you can have DX 11 in 32-bit.

I have invented another trick.I need to move my ram into another slot.But this trick also not working now.
And also see that in restarting season Mirror edge's run quite long (in Xp 1-1.5 hour,in win7 20-45 min)in my pc,where dirt 2 run only 2 sec.And other games like Call of duty MW2 run 1min,Assassin's creed 2 run 10-30 sec,Prince of persia FS run only 6-10 sec.I don't understand what is happening.Is mirror edge consume less power than other games?
Is my PSU damaged or PSU & Motherboard both are damaged?

I would definitely check out heating issues and the power supply. Either one left untreated could mess up your computer. Definitely from what you have said before, look at another power supply. Junk the one that is in there, get something like an Antec or Corsair unit and that should help.

Also, download a program called speedfan and check the temperatures with it, it should give you an idea how hot components are getting inside the pc.

However, if your power supply is the issue and you keep running it like that, you could fry the entire machine.

I remember at the time when my pc start restart continuously,my USB mouse get damage.I have a old mouse(not USB),so I plug that mouse in my pc.But it also get damaged.In next day I have to buy a new USB mouse.
yesterday my pc start working,so I invite a friend with his joy-pad to play with me.But I get shocked when I learn that my joy-pad (USB) is also damage.And my card reader can't read any memory card.WHAT IS HAPPENING ?????
Is this is PSU problem or motherboard?
Don't worry I got warranty,Please tell me where is the problem?

Most interesting thing is that whenever I go to service center with my PC,my PC become normal.
It happened two times.

Whenever the pc restart,I found that my maximum temperature of core is 59-58C.
I've no AC in my room.Some time my PC become normal in hot day,And also some time my PC start restart in cold day.But i think bringing my PC in an Air controlled room,
it become normal.
And for your information I keep my casing open and also I am using a stand fan,but nothing working.
At first my PC has no problem(Even in hot day or very sunny day).The problem start after days,but that time this is looks like a minor problem.But now the problem got bigger!
Any suggestion?

It is raining now,so it is cold here.But I can't turn on my pc.It get overheated & restart.

They(Seller) said to me that the problem is my BIOS.Because Gigabyte motherboard can hardly support C2Q & so it need BIOS update.So they update my BIOS.At present my PC is running without any problem.They said me to test my PC a week.Can BIOS cause restart?

I think my problem is solved.I run my PC a week without any problem.But i can't understand can BIOS cause damage to USB device?

Best answer selected by gameranik.