AMD-ATI zerocore

[daponz]

Hi all,

I'm very interested in 7000 series feature called "zerocore" which puts the card in a sort of standby mode when screen goes blank.

I have note been able to find any input regarding zerocore support under linux runing FGLRX.

Does anyone has information about zerocore support under GNU/linux?

Any help would be much appreciated!

Thanks

[edcr]

just testet it on hd7750 and fglrx 12.9 ,ubuntu 12.04, ASPM on

with code: "xset dpms force off"

whole computer measured:
idle: around 43W
idle monitor off: around 42W

dont know if that 1W accounts to zerocore or something else related
aspm activated did lower it around 6W in idle though

http://en.wikipedia.org/wiki/Active_...wer_Management

[crazycheese]

Power up your machine. Put it into lowest power state as you can. Measure it.
Reboot, set in BIOS/UEFI - continue on all errors.

Open the machine, remove GPU completely. Reboot. If it boots till sound, measure - thats raw performance without GPU.
It doesn´t play any role if Xorg was started or no, main point is cpu-governor should start and that happens if kernel and init system work.

You can make a daemon to create some random file at end of the boot as confirmation that machine did boot.

[edcr]

the hd7750 idles around 5W
http://www.techpowerup.com/reviews/ASUS/HD_7750/24.html

zerocore reduces that to 3W
http://www.legitreviews.com/article/1805/13/

so my 1W less finding may be the zerocore deepest state cause they used an active cooler version there(+1W?) an i have a passive card.
but doas it matter?
0,002kW*24h*365d*0,25cent/kWh=4,38€ /year difference if its idle all the time