Help overclocking GTX 650

[Several Zombies]

So I'm having some trouble trying to get my old GTX 650 to perform. Running the new Borderlands on moderately high settings, I was noticing a lot of framerate dips, and could rarely stay above 50 FPS, especially when things got busy on screen. Since I'm broke as hell and am pretty much stuck with this GPU for a while, I figured I'd try to overclock it and get a bit more life out of it. 

 

The stock speeds for the core and memory are 1202MHz and 1250MHz respectively. I did a bit of reading and found a handful of fairly common overclocks for this card (EVGA GTX 650), running the gamut from between +150/+165 to upwards of +200/+350. Tried them all at varying voltages with no success. I even attempted a more subdued overclock of +100/+120, and still experienced crashing.

 

Unigine Heaven gave me a rating of 542 stock, and couldn't complete the benchmark successfully on any of the above OCs.

 

Anybody got some tips or tricks that might get this thing working?

[Raudi_]

So I'm having some trouble trying to get my old GTX 650 to perform. Running the new Borderlands on moderately high settings, I was noticing a lot of framerate dips, and could rarely stay above 50 FPS, especially when things got busy on screen. Since I'm broke as hell and am pretty much stuck with this GPU for a while, I figured I'd try to overclock it and get a bit more life out of it. 

 

The stock speeds for the core and memory are 1202MHz and 1250MHz respectively. I did a bit of reading and found a handful of fairly common overclocks for this card (EVGA GTX 650), running the gamut from between +150/+165 to upwards of +200/+350. Tried them all at varying voltages with no success. I even attempted a more subdued overclock of +100/+120, and still experienced crashing.

 

Haven gave me a rating of 542 stock, and couldn't complete the benchmark successfully on any of the above OCs.

 

Anybody got some tips or tricks that might get this thing working?

With Kepler overclock by using a base of +13 for it on stock voltage.

[Several Zombies]

Seemed promising at first but it still wont push past 1305MHz without crashing. What I find confusing is that I managed to get it higher at first, and once I started scaling back down to what had been "stable" before, it was crashing at values it had previously completed no problem. Any ideas?