as topic , i just bought a new pc which GPU is asus GTX 660 ti
everything was run pretty smooth but when i run to dota 2 full graphic
my GPU clock reached max Mhz ( 1105 ) and my GPU memory reached max ( 6084 )
after i play while about 10min , my pc freeze and forced to restart myself
any could help me out what happen?

Mother board Asus Z87-M
and i play other game no prob , such as RO2 , dragon nest

Your pc freeze like what?

Got some checkered green thing come out or not?

Or it's like just freeze (stuck in mid game) then restart?

it's like just freeze and my mouse , keyboard those not working , so i got to restart my pc manually

Did you overclock your GPU?

If yes. Try to pull down your GPU clock and memory

pic

this is how my gpu setting , and it was default gaming setting , i even tried to lower them to offset : 0
but still freeze =(

pic

i was using default gaming setting ,
The setting was GPU boost Mhz : 1105 (offset : 21 )
memory Mhz : 6048 (offset : 40 )
i even tried to lower them to offset : 0
but still freeze =(

Try download this.
http://unigine.com/products/heaven/

And then set your GPU all to default. Then run the benchmark. Then slowly push it to the limit until it crashes. After that pull it back again to where it last stable.