Is my cpu bad

so i bought a pc with the folowing specs:
GTX560Ti Hawk OC 1GB/DDR5
4GB DDR3 1600mhz Kingston HyperX 1.65v
WD Caviar Black 1TB 6GB/S Sata3
Intel I5-2500K 3.3ghz Coolermaster Hyper 212+
MSI P67-C43 (B3)
Thermaltake Toughpower XT775W
Windows 7 Ultimate 64bit
So here is my dilema i built this pc myself checked all the parts on the web its all compatible exept one minor glitch i did not catch on to the sandy bridge and the mobo support 1.5volts ram max mine is 1.65 but the mobo automaticly turned it down to 1.4 when my ram was 1333mhz but then when i turned it up i didnt notice that the volts were 1.65 on the ram and that went on for a while so im thinking that that screwed my cpu.My problem is that all the games have a weird bug wich didnt go away even after instaling a fresh OS so all the games have a weird bug in wich the weapons,characters,or something else lags for instance my characters hand and weapons in skyrim shake when he is moving or in rage where when i move a weapon it lags or in stalker where im experiancing lag in preformance and the nps shaking when moving so what could that be now im also experiancing my pc restarting randomly and even shuting down then taking it 30 tries to bot up or me blowing the gfx fans and it starting after that so maybe its the gfx my pc also frezes from time to time in the first 2 weeks it was awesome then these problems started ocuring in this order (1)i acidentaly forgot to set the fans on the gfx and played bad company for 3 min until realasing that i made a mistake then when i checked the gfx vram temps were 103C when the max are 95C after that the bug i mentioned ocured(2)i left it thinking it will go away then i got the pc shuts down then takes me 30 times pushing the power on buton until starting before that it would just start for 1 sec and then turn of(3)after that i started geting frezes(4)after that when ever i would oc my gfx to 1ghz wich is fine it would stop working then turn on and set the fans to 100% wich didnt hapen before so nov im freaking out and im going to sed my pc for analysis but i would like to hear what you guys think nad whatever the problem since i have warancys i can replace any part but i would like to know what caused all of this

GPU at 103c is pretty high. Most nVidias can handle 100C+ but thats still high. I would say its your GPU, not CPU as most games are more GPU dependant than CPU.

I have a I5-2500k aswell, My ram is running at 1,65 volt, working just fine.

by that i mean blowing out the dust

nah my pc has a gift of every game runing bug free for instance the witcher 2 assasins of kings worked from the start no crashes no sound bugs nada and i think that the gpu is the problem here

my temps are ok now dont go above 50C on heavy gaming cpu temps are 46max so its cool but i think that the gfx is damaged so i will be sending my pc for analysis since i still have all those problems but im prety sure that the gfx is damage so once they confrm i will be replacing it