NeFoRcE schreef op maandag 30 januari 2012 @ 15:39:
Mijn kaart (Sapphire) wordt trouwens 60 graden... idle. Als ik in windows zit, en NIETS doe, zit ie op 57,58 graden. Als ik wat programmeer en lichtgrafische dingetjes, gaat ie naar de 60 graden.
Airflow is niet optimaal in m'n huidige bak, maar wel een sidefan die op de kaart blaast. Dit lijkt me aan de warme kant?
Kan het zijn dat je memory clock op 1375MHz blijft lopen idle? Dat heb ik hier ook als ik meer dan 1 scherm gebruik. Ik heb even gezocht:
[message]Anandtech:[/message]
On that note, for anyone who is curious about idle clockspeeds and power consumption with multiple monitors, it has not changed relative to the 6970. When using a TMDS-type monitor along with any other monitor, AMD has to raise their idle clockspeeds from 350MHz core and 600Mhz memory to 350MHz core and the full 5.5GHz speed for memory, with the power penalty for that being around 30W. Matched timing monitors used exclusively over DisplayPort will continue to be the only way to be able to use multiple monitors without incurring an idle penalty.
Als ik 1 (HDMI) scherm gebruik gaat memory clock naar 150MHz en de temperatuur naar zo'n 30 graden. Met twee schermen gaat memory clock naar 1375MHz idle en temperatuur is dan ook een stuk hoger.
Oplossing: Alleen native displayport schermen gebruiken bij multi monitor. Of switchen naar single monitor.
Edit: Nog wat uitleg van anandtech forum:
If you recall our 5800 series article, we mentioned that AMD finally has the ability to change the clock speeds on GDDR5, using fast link retraining. In order to make FTR work without disrupting any images, FTR needs to be done during a v-blank period so that the monitor isn’t reading from the front buffer, as the front buffer will be momentarily unavailable during the FTR. This is very easy to accomplish when you only have 1 monitor, because there’s only 1 v-sync cycle to deal with.
The issue is that with multiple monitors, there’s no guarantee that the all of the monitors will be perfectly synchronized. It’s possible for the monitors to be out of sync (particularly when using different display types, i.e. a DVI and a DP), which results in flickering on any monitors not in sync with the monitor the FTR was timed off of. This is the flickering you see when you have an overclocked card, as the card is accidentally switching GDDR5 speeds when it shouldn’t be. [At the time, a card overclocked with CCC would not go in to the correct 2-monitor PP idle state]
So the reason AMD keeps cards at a higher state when multiple monitors are attached is to preventing that flickering. This means at a minimum keeping the GDDR5 at whatever it defaults to (1000mhz/1200mhz). I’m not entirely sure why the GPU is kept at a higher state too, but my best guess is that there may be performance issues with trying to draw to 2 large monitors at such low clock speeds. Or it may be that this is just easier than creating another powerplay state.
Lijkt ook van toepassing op 7970.
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Voor 36% gewijzigd door
Francois op 30-01-2012 16:49
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