5970, Linux: How do I underclock the RAM below the allowed range?

[Pygy]

I'm trying to underclock the RAM of my Radeon 5970 below the allowed range of [1000-1500]MHz, but even aticonfig --odsc 0,999 gives me an error...

Is there a way to override the limit? I've seen many people around here with similar cards and the RAM clock set at 300MHz...

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[martok]

Hi,

There is a thread on this in the forum somewhere. But try to get hold of amdoverdrivectrl. I use it to downclock the RAM on a 5970.

[Inaba]

I use RBE and flash the BIOS to the settings I want.

[MiningBuddy]

Hi,

There is a thread on this in the forum somewhere. But try to get hold of amdoverdrivectrl. I use it to downclock the RAM on a 5970.

I think this is the one, https://forum.bitcoin.org/index.php?topic=9569
It works, but would be nice to have a more streamline process.

[martok]

You can streamline it. My script looks something like:
for i in 0 3 4 7; do
amdoverdrivectrl -b -i $i 5970.xml
done

Stick that in your .gnomerc or whatever and you're good to go.

[Pygy]

Thank you, I'll have a look at that, probably tomorrow.

What can I expect in terms of temperature by underclocking the RAM it to the 300-400MHz range?

[MiningBuddy]

Thank you, I'll have a look at that, probably tomorrow.

What can I expect in terms of temperature by underclocking the RAM it to the 300-400MHz range?

My 5870 dropped from 75C to 58C 

[Pygy]

Ok, I got AMDOverdrivectrl to work :-)