The problem follows: When i play a game for some time, it will just randomly freeze with different symptoms, but i will have to reboot my pc by pressing reset or powering it down. For example: I play a game (battlefield bad company 2, or age of conan) all maxed out, the card is like 65-70degrees, everything is smooth, no artifacts, no lags.
Type #1 - Then boom - the sound might start doing a TRRRRRRRRRRRRRRRR, the mouse freezes, the screen freezes. Then the TRRRR stops and i can hear the music in the game, but still everything is frozen including number lock. So i have to reset.
Type #2 - The screen just freezes, the sound remains neutral (playing ambient sounds), number lock is reacting, then it stops reacting, and my monitor goes black and says dvi display or smth - well as if it wasn't plugged. And i still hear the sounds
Type #3 - The screen freezes, all the combat sounds go away, but i hear the ambient sounds, and i can move the mouse, yet it updates it's location like once in 0,5seconds. Then in like 20 seconds it freezes completely and i have to restart again.
There might be other types of crashes, but i did not memorize them all, i hope these are enough for you to give me some advice.
My card is not overheating, everything in my PC works fine, it always worked until i replaced my video card, and my PSU is a 100 euro psu from OCZ 600watts, and it does its job just fine. I would like to remind, that it happens randomly, might happen in 30 minutes, might happen in 3 hours. I have reinstalled windows some time ago, so its not related to bad drivers or so, my drivers are up to date.
Why am i posting this only after 3 weeks, because i didnt play games activly for some time, and today i tried to play Age of conan, it crashed my pc after 1 hour of gameplay, so i made some tea, came back and played for 30 mins more - BOOM. Then i figured that its better to play BFBC2, so i played it for an hour, and BOOM! Pc crashed again with no video signal thingy. I wrote this post and in 15 minutes of bfbc2 gameplay the screen got a small lag with a sound trr then it was normal for 10 secs, then it happened again and i had to manually reboot, because the screen became black. Then i played again for 15 minutes and it just froze. Just Froze and then black screen and i had to shutdown manually and go to sleep.
Intel i7 920 @ 2.66Ghz
OCZ 6gb (3x2gb) RAM Platinium Edition 1333mhz PC10666 CL7
1 HDD 500gb
OCZ600MXSP - 600w Power supply
GV-N560OC-1GI - Nvidia GTX 560 Ti 1gb (factory oc'ed to 900gpu/1002memory/1800shader)
Windows 7 64bits.