Hey guys im just wondering if anybody knows the safe overclocking speeds for 2 Nvidia geforce gts 450 cards connected via SLI.
I am using msi afterburner to overclock but i experienced slight screen tearing and black ops 2 freezing (multiplayer) so i reset the settings. My psu is a vantec and i think its ion+2 600w but i cant get to the sticker and i am using an intel 17 2600 and my motherboard is an intel dp67bg.
What you are describing is typical of a heat and/or power issue. Honestly, I suspect your PSU in not up to the task of powering 2 OCed GTS 450s. Might be time for a better (I suggest Seasonic and Corsair) PSU.
Sounds like you are fine at stock speeds.
BTW, are you OCing your CPU and/or memory as well?