Problem OCing gtx 560 - strange crash

[Altaren]

Hello everyone, new guy here. Ive been reading these forums a lot though only now have i encountered a problem that (i believe) has not been answered yet.
I got interested in overclocking my Gigabyte gtx 560 (i believe its a 560ti, even though the box and everything else just says 560). What ive read suggests that i could comfortably OC to 910ish core from 830 with voltage to 1.075 from 1. What seems odd to me is that whenever i increase voltage by just a little i soon get a crash when stress testing with Kombustor. The same crash happens when i go over 880 mhz (stock voltage) and its basically my monitor losing connection but the PC is still running in the back, sometimes an auto reboot happens in the first minute but mostly it just stays that way. This all happens at around 75C which makes me think i could squeeze out more than just 880 mhz that im getting with stock voltage.
Im running latest nvidia drivers on win 8.1 and ive a 600W psu. I dont really care all that much for the extra 50mhz or whatever im just curious how come it crashes with stock clock and only a voltage increase from 1 to 1.01. Thanks in advance

 

[AzisTroyanov]

Maybe its just your card. Some cards do not OC well at all, while others are fine.

The crashing is occurring because maybe the OC is too high?

 

[Altaren]

Maybe its just your card. Some cards do not OC well at all, while others are fine.

The crashing is occurring because maybe the OC is too high?

Actually 880mhz also crashes after a longer stress test. I dont mind something like 850 being the limit but like i said it also crashes with stock clock and a voltage increase of only 0.01
Im pretty new to overclocking but that seems odd to me and im wondering if the cause of these crashes could be a faulty wire or something mobo related. Im upgrading to a new system soon so performance gain is not that important to me but i want to see what i can do and learn and so far this has been a short adventure.
This crash seems pretty unique, like i said it only disconnects the monitor and the pc is still running tho all programs close and i cant use any keyboard combination to change anything or restart the PC. From what ive read reaching your card limit is either too high temperatures or system shutdowns/artifacts. Ill do some more reading but i figured someone with more experience than me might get me a better answer.
PS: sorry for the second arguably unnecessary wall of text

 

[AzisTroyanov]

Maybe its just your card. Some cards do not OC well at all, while others are fine.

The crashing is occurring because maybe the OC is too high?

Actually 880mhz also crashes after a longer stress test. I dont mind something like 850 being the limit but like i said it also crashes with stock clock and a voltage increase of only 0.01
Im pretty new to overclocking but that seems odd to me and im wondering if the cause of these crashes could be a faulty wire or something mobo related. Im upgrading to a new system soon so performance gain is not that important to me but i want to see what i can do and learn and so far this has been a short adventure.
This crash seems pretty unique, like i said it only disconnects the monitor and the pc is still running tho all programs close and i cant use any keyboard combination to change anything or restart the PC. From what ive read reaching your card limit is either too high temperatures or system shutdowns/artifacts. Ill do some more reading but i figured someone with more experience than me might get me a better answer.
PS: sorry for the second arguably unnecessary wall of text

Hahah. That's ok


Well, I would do some research because it doesnt make too much sense that it is crashing on such little overvoltages. Perhaps the card is defective? Remember, overclocking is going beyond spec, so things can happen.