cant underclock under 900MHz Memory on ASUS EAH6870

[Amaretto]

Hey guys,

i dont get it.

There are so many posts where i read that you can underclock a 6870 to 300MHz Memory Clock to get the Temps down.

Everytime i do this with MSI Afterburner it pops back up to 1050 MHz.

He accepts everything till a downclock to 900 MHz everything under that will dont take any effect.

Is there anything that i have to change in the MSI Afterburner tool or is it simply not possible with the ASUS card?


Thanks in advance

[heliosxx]

I have the same problem on HIS 6870. It seems to be locked to the gpu speed in some fashion as changing that changes the lowest minimum memory speed.

[deepceleron]

You might try this, it allows you to change the minimum and maximum that ati overdrive can set the card to:

http://www.techimo.com/forum/graphics-cards-displays/256789-enable-higher-overclocks-ccc-reg-entry.html

[heliosxx]

I found the solution,
edit the msiafterburner.cfg file and replace the two lines:
UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode   = 2

[Amaretto]

oh nice,

will try this now.

thank you!

[ShadesOfMarble]

I found the solution,
edit the msiafterburner.cfg file and replace the two lines:
UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode   = 2

Isn't this mainly for OVERclocking the card beyond "safe limits"? Why should UNDERclocking be limitted?

[heliosxx]

You'd think so, but for me it stopped the exact behavior described here with the memory speed. I was able to underclock (and have it stick) to 575, then after restarting the app, down to 300.

[Morebitcoinsplease]

I also under clock to 300 or 330 keeps the cards temperatures down from the default limit.