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Instability at "stock" clocks

R400

R400

R400

Associate
Joined
2 Nov 2013
Posts
54
I have a Windforce 780ti oc that I suspect is unstable.
It has a stock boost speed of 1020Mhz but shot right past that to 1150Mhz at 1.2V (the boost speed of the Ghz edition coincidentally) straight out of the box, I tried pushing a little further but it wouldn't hold it for more than a few minutes, not even a little more on the memory, so I left it as it was and was mostly happy.

But today there was a crash while playing AC4 (while taking three frigates at once like a boss) with a freeze, then a black screen and corrupted audio.
So I have a few questions;

Is having such a high out-of-the-box speed normal for Kepler cards? my understanding of turbo boost 2.0 is that it will boost up to a temperature or power limit (power in my case), if so why do manufacturers bother quoting stock and boost speeds if the speed is dynamic?

How do nvidia validate their bins? how do they know a certain speed and voltage is going to be stable?

Could this be power delivery thing? I have heard that reference cards can overheat their vregs and I think gigabyte use a semi-reference design.

Or have I accidentally been sent a Ghz edition with a faulty backplate, i.e. non existent.
 
1.2v is stock volts, and it's normal for a windforce to be able to hit those kind of boost clocks if temps allow it.

And as to why manufacturers quote? Very good question, they shouldn't really. I can't see it being an issue with the clocks, but if the card is genuinely unable to maintain 1150mhz without crashing at stock settings then RMA it.

I don't know how or if Gigabyte bin their chips either. What is your powersupply? Need system specs :)
 
Seasonic 860w platinum, I don't think that's at fault, its been rock solid under more load than AC4 can give.

Just noticed something, silverlight appears to have stopped working and I can't watch neflix, can someone check if theirs works? I think my graphics driver may have crapped itself. Will try reinstalling.
 
What drivers? The latest WHQLs have been rock solid for me, but my brothers machine on his 680 Classy has been falling over itself and locking up recently. I did a driver clean up for him when I was over there earlier and it seems to be behaving itself now, so maybe try doing that. And use the latest betas instead.
 
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