some times while i am playing a game called hereosofnewrth my pc freezes at first it slow down i mean very slow down like pictures after each other for 2 it first slow down for 2 sc very slow i mean
z and speakers make a noise like zzzzzzz then computer completely freezes and sound keep on and i find my graphics card very hot can some 1 tell me what to do i am runing my pc on a 42 inch telvision with hd cableThe PC is overheating.
If it is a new PC, use the warranty and have it fixed.
If it is not a new PC the heat sink FAN on your CPU has failed or is failing and should be replaced. there you can also check your hard disk or motherboard... make sure you also put your pc in a place where it is not heaty so the air flow will go rotational.While overheating is a real possibility, you should check for it first before jumping to conclusions. 

To check your temperatures, download and run HWMonitor from here: http://www.cpuid.com/softwares/hwmonitor.html.  This will state the temperature of different components in the computer.  Once that's open you should start the game and run it for a while (But not long enough so that the machine completely freezes). Afterwards, close the game and see what temperatures it shows under "Max" for both your CPU and graphics.

Post these temperatures here along with the specs of your machine, that will help determine if overheating is the cause of the problem.played for 1 h  graphics  temp 76  possessors are 65 i don't know where is the cpu 

 can the problem be from the power supply as its an bad cheap 1 ii bought my computer 3 weeeks ago but  i  BUILD it up most of  hardware got warranty on it

[recovering disk space, attachment deleted by admin]Pics are pixelated blur when sized to view to read them.what temp reading you want and i will tell you just help me plzJust Post them...no need to ask which ones we want...cant post a big IMAGE bec of size i thinkReplace the PSU...
You did state it was a cheapo unit.