Excessive Overclock ?

[Alienware Gamer ALX]

i m using a gtx 680mx on a old imac for gaming.

i overclocked it (+280core +550 mem) - temp is around 90° with 93°max.

is it too much ?

could be "safe" +200 +400 ? temp is exactly the same


the new imac (2015-2016-2017)are 100% safe at 100°, it s their normal temp under stress, but the old models no


edit: on this mac i m using windows 10 to play

 

[Avet]

There is no such thing as too much overclock.

If it is stable, there is no reason to downclock it.

 

[AlienALX]

That's too hot. Far, far too hot for a Kepler. Kepler was revolutionary because it wasn't hot.

I don't know if there is anything to this but every GPU I have ever had that I have kept under 80c has never failed.

I would look into replacing the TIM with liquid metal. Apple use tossware TIM tbh.

There is no such thing as too much overclock.

If it is stable, there is no reason to downclock it.

I would bet a tenner it would die of BGA failure at those temps. That really is crazy for Kepler or in fact any small core.

 

[NeverBackDown]

Far to hot. Like way over the top hot.

I would suggest not going over Nvidia's recommendation of 83C for the best performance and longest lifespan.

 

[Kaapstad]

That's too hot. Far, far too hot for a Kepler. Kepler was revolutionary because it wasn't hot.

I don't know if there is anything to this but every GPU I have ever had that I have kept under 80c has never failed.

I would look into replacing the TIM with liquid metal. Apple use tossware TIM tbh.



I would bet a tenner it would die of BGA failure at those temps. That really is crazy for Kepler or in fact any small core.

It is running too hot for a single Kepler GPU and will be throttling a lot.

Kepler can run at those temps though as this is the sort of temps you see on GPU 1 if you run a pair of GTX 690s in 4 way SLI, having said that the dual cards were designed to cope with those temps but the 680 was not.

My GTX 690s are still going strong, sadly there is very little they can run @2160p with 2gb of VRAM per GPU.

 

[Arne Saknussemm]

That is a lot of Memory OC...one of the quickest ways to artifacting and dead card...

Have you run a benchmark at 550 and say 400 on the mem...might find performance increases away from the ragged edge.

 

[Alienware Gamer ALX]

There is no such thing as too much overclock.

If it is stable, there is no reason to downclock it.

That's too hot. Far, far too hot for a Kepler. Kepler was revolutionary because it wasn't hot.

I don't know if there is anything to this but every GPU I have ever had that I have kept under 80c has never failed.

I would look into replacing the TIM with liquid metal. Apple use tossware TIM tbh.



I would bet a tenner it would die of BGA failure at those temps. That really is crazy for Kepler or in fact any small core.

Far to hot. Like way over the top hot.

I would suggest not going over Nvidia's recommendation of 83C for the best performance and longest lifespan.

thank you, sadly the min temp for this gpu in this case is 86° while gaming (at stock speed) but i m having a big increase in performance with this oc.(there is some throttling i think, but should not be huge)

It is running too hot for a single Kepler GPU and will be throttling a lot.

Kepler can run at those temps though as this is the sort of temps you see on GPU 1 if you run a pair of GTX 690s in 4 way SLI, having said that the dual cards were designed to cope with those temps but the 680 was not.

My GTX 690s are still going strong, sadly there is very little they can run @2160p with 2gb of VRAM per GPU.

Is Throttling just above 83° or 86-90° ?

That is a lot of Memory OC...one of the quickest ways to artifacting and dead card...

Have you run a benchmark at 550 and say 400 on the mem...might find performance increases away from the ragged edge.

i haven t tried benchmarks, but this is a good idea

i just played Overwatch ad high settings at 2650x1440p.
there s a big gain in performance vs default, but i have no difference between mem@400 or @550

 

[looz]

I can't find any Kepler specific specs but mobile GPUs can often handle 100c without issues. I wouldn't worry too much if it isn't throttling.

 

[Kaapstad]

Is Throttling just above 83° or 86-90° ?

IIRC Kepler loses 13mhz for every 10 degrees, it is much the same as newer architectures where the lower the temps the better.