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Depends whether the target temp has been changed or not though. It's a reference design so yeah normally will throttle at 95c by default.
I find it hard to believe you can keep a reference card at 85c when overclocked with raised volts, unless the cooling has been changed or running a very high fan speed which must be a bit noisy.
What sort of clock speeds are you guys seeing with these voltages? How much of an improvement are you seeing from say 1.2v - 1.3v / 1.3v - 1.4v? Surely it'll hit a cliff at some point just like CPU's where by you'll need huge amounts of voltage for just a couple of mhz
Max I've got so far is 1250/1625 +200mv using gpu tweak, sure there's plenty more but that will have to wait till I've got another 290x and both are underwater.
It's fascinating how the results vary from card to card... 6 Billion transistors on the silicon wafer, that's mind blowing too!
I am able to run circa 1125/1575 on stock voltage, +81mv = 1175mhz on the core, +100mv = 1190mhz... Running Unigine Valley for just a few loops as I was interested.
I have noticed some odd behaviour in some circumstances. When overclocking the memory, it will be very stable in game, but come to desktop you notice some screen tearing until you back off the memory overclock.
Push the core too far and it'll artifact but also the system will just reboot, like i've hit the reset button. I've never had that behaviour on previous cards.
What things did you notice Doogles?
I wish someone would do an article testing hardware to destruction. I.e; taking say a couple of R9 290's and running them for days on end with huge over volts until they fail.