i think my cpu just went dead

hey ppl i could use some advice on this one.

i started tweaking with cpu over clocking on my new system.
i was using my cpu at 4Ghz (base clock is 3.3Ghz) on 20-30 degrees (all in all very stable) mem at base speed 1066mhz.
so i decided i could add at least 500mhz more
so i went on and changed that in the bios to 4.5Ghz and high mem speed (dont remember how much)
after seeing tweaches at post screen i did lower it to 4.44Ghz and mem speed to 1183mhz.
since my ram speed on the 4gigz config was the normal mam speed i figured id just try and use it at 1183mhz.

ive inputed 1.35V for cpu voltage and rebooted
it booted and i started stressing with Pi and after 11sec
result on the 1M test ,i went on to 8M to do more stress tests.
it stuck on 3rd loop or so and rebooted but never loaded post screen.

i thought mayb my mem sticks got fried or smt, so i changed them but still no load.
i really thought my pc could be much OCed than this
(READ THE TOS)

do you think i really fried my cpu or mobo?
btw - i do remember the temp during Pi test was about 40-50 on 4.44Ghz config