Weird 680 overclocks

[ReillyP]

Okay so had recently formatted all my drives and have just got on to overclocking my DCU2 680 and everything is just going to hell on different bench marks (I am overclocking using afterburner) 

FURMARK: Core clock is stable at +50 Memory clock can not be raised without a crash
OCCT: Core clock is stable at +100 Memory clock is stable at +985
VALLEY: Core clock can not be raised without a crash Memory has to be down clocked to run the test

3D MARK (Firestrike extreme): Core clock stable at +25 Memory clock stable at +550



I don't get what is up with all these different bench marks, as it is also differnt for games like metro redux and bio shock infinite 
 

I don't see what I am doing wrong, please some advice 


(Also GPU Z detects my physX only half the time) 


** Numbers did not change when I cleaned dust out of rads and re did tim on both cpu and gpu**

[xnoobftw]

Use unigine heaven for benchmarks (it is the most demanding one) and then test it in video games instead of different benchmarkers, ( i would usually tone the GPU core clock down by 20Mhz and 50 on the memory when i get stable in heaven)

[ReillyP]

Use unigine heaven for benchmarks (it is the most demanding one) and then test it in video games instead of different benchmarkers, ( i would usually tone the GPU core clock down by 20Mhz and 50 on the memory when i get stable in heaven)

Haven did not fair any better than valley, crashed on base clock. 

It doesn't make sense, I had it stable at 100 core and about 550 memory before this reinstall 

[xnoobftw]

Haven did not fair any better than valley, crashed on base clock. 

It doesn't make sense, I had it stable at 100 core and about 550 memory before this reinstall 

You probably gotten a bad card, do you still have the warranty for the card?

[ReillyP]

You probably gotten a bad card, do you still have the warranty for the card?

I think so, I will check

[Briggsy]

Okay so had recently formatted all my drives and have just got on to overclocking my DCU2 680 and everything is just going to hell on different bench marks (I am overclocking using afterburner) 

FURMARK: Core clock is stable at +50 Memory clock can not be raised without a crash

OCCT: Core clock is stable at +100 Memory clock is stable at +985

VALLEY: Core clock can not be raised without a crash Memory has to be down clocked to run the test

3D MARK (Firestrike extreme): Core clock stable at +25 Memory clock stable at +550

I don't get what is up with all these different bench marks, as it is also differnt for games like metro redux and bio shock infinite 

 

I don't see what I am doing wrong, please some advice 

(Also GPU Z detects my physX only half the time) 

** Numbers did not change when I cleaned dust out of rads and re did tim on both cpu and gpu**

 

try running your cpu at stock speeds, and System Ram at 1333/1600 (if not already) while overclocking your gpu. it's a long shot, but who knows. The DCU2 design makes it really hard to over-tighten the screws, and warp the PCB, so unlikely that unless different screws were used and over-tightened.