hmm, last time i faced similiar problem with u,

the scenario is like this,

last time mistaken bought a hard modded gc,
and the soldering not good,
sometimes touch and sometimes dun...

and i didnt notice it...
after sometimes using it,
it went crazy and the com restart syok syok he like,
i thought is hdd problem then bought new hdd to test,
and same thing just happened,

change to old gc which is double check healthy and good,
same problem occur also...

then later change mobo to try,
viola, mobo went crazy bcoz of the improper soldering...

RMA the old mobo and resolder back the GC,
and tested the rig for 1 month 24hours not shutting down,
no problem occur till now...


wat is suspect is ur gc make ur mobo went crazy..

it is like tis one,
last time mine actually plug in the modded gc all went good too,
but after 1 week or 2,
maybe goyang goyang the casing,
then the capacitor soldering went loose,

and this happened...
i believe ur hdd should be healthy...
either mobo or gc is the killer...
or both of them are...

btw, looks like many his 3870 iceq3 turbo user facing a lot of problem....

hmm, the new 500gb bring to have a check at healthy computer,
dun make it as primary for installing windows,
check the hdd whether is healthy or not 1st,
btw, make sure u using a working sata cable 1st lar...

unknown problem with ur rig really headache one,
like mine also same last time...
though hdd die mana tau it still serve me until now...