Voltage Safety 780M GTX

Hey guys, I was just wondering is a +100mV increase is dangerous to my card at all? I have the Svl7 Vbios flashed so them voltages are in fact available.

I am asking because I have been Running 1050Mhz Core and 2900Mhz Memory and +62.5mV for a day now and didn't see temps over 80c. This is with max fans and without a Cooler playing BF4.

So what do you guys think, is +100mV really going to affect my cards lifespan that much? Or even +62.mV for that matter? Thanks

 

The relative increase in performance might not be worth the extra heat and potential throttle. The voltage is safe on the silicon (mobile parts run at lower voltages than the desktop though lifespan will go down due to physics) but the temperature will go up exponentially with the voltage.

 

Hey Meaker thanks for the reply. I think you may be right.

I had spent all day plotting a graph on stable overclocks Vs Voltage. And well the results show that a 110Mhz Increase on core with stock voltage is much more effecient than my other results.

For example to get +180Mhz on the core I had to increase the Voltage +62.5mV which is quite a lot for a 70Mhz increase. So by looking at the graph I see it definitely is not worth the Voltage increase. I am running +107Mhz Core and +505Mhz Mem (These are actual values because I realised that even though you increase on NV Inspector the actual value is different) So I am running 957Mhz Core and 3005Mhz Memory at Stock 1.000V (With SVL7's Bios) and my 3D mark 11 Result was P8890.

.....But increasing my voltage +75.0V and core to 1050Mhz i was only able to achieve a score of P9250, So a pretty lousy increase give the amount of voltage given.

I also have far lower temps since my first post however, with my 957Mhz,3005Mhz and 1.000V clock I had never been past 60c on BF4 (BF4 also stutters often even though FPS is 60+, I don't know if it's my overclock or the game itself)
but anyway what I have is a Coolermaster U3 and have taken the back panel off my Clevo P170SM and has made all the difference in the world. I will permanently have the back panel off now unless I am moving the laptop.

So basically I am happy with the clocks I have at the moment, I always cap my FPS to 60 anyway so that's always great.

One more question though, If temps were not a concern, let's say it stays under 70c at all times. Would Overvolting +100mV shorten the lifespan considerably? or is it a very minute concern compared to temps?

Thanks very much Meaker

 

Temperature is the biggest factor.

 

Yes that is exactly what I thought, I was just wondering as there is a lot of controversy on how voltage affects chips. Such as Electro-migration, but it's to my understanding that voltage isn't so much the amount of "Juice" you give it, but instead a boundary so 1's don't get mistaken for 0's and vice versa. Because Voltage is how chips calculate binary.

But anyway like I said I am happy with my Overclock now. It seems stable at 957Mhz Core and 3005Mhz Memory with Stock Voltage. As this is the highest jump per Voltage increase.
And TBH this card runs games great so I am happy with that

Thanks for you time Meaker Have a nice day

 

The voltages that cause damage caused notebooks to instantly overheat so there is no reason to go near that limit.

 

That's good news then, at least I have to option to run +100mV if I wanted to. Like I say heat isn't a concern for me really as I run with the back plate taken of and have a notebook cooler (Coolermaster U3) underneath.

I really only would run +100mV to see benchmark results anyway, and not game with it.

Thanks Meaker

 

I believe 1.15-1.2v is the limit for long term GK104 running IIRC for example.

 

Well that's a lot higher than I expected, SVL7's bios only allows 1.1v max anyway. Well thanks for the help Meaker, it's much appreciated

Have a good day