Bitcoin Forum

I just got my 7970 ghz edition. What drivers should I use?
What mining software should I use?
How should I overclock it(what settings)?

https://bitcointalk.org/index.php?topic=84989.0

1/3 of the way down on the first page. Try there.

So 12.2 with SDK 2.6?

A 7970 needs 2.6 or later.

I'm using 12.8 with 2.7 and no issues.

12.8 is also working fine for me with 7000 series.

Running BAMT 1100/950 on most all my 7970's

What clock settings should I run on my 7970?

Memory should be 150MHz lower than the core. Each card is different tho. Try 1000/850? 1050/900? 1100/950?

Same here. I had 12.7 drivers with 2.7 SDK installed. I did an in place(no uninstall of previous drivers before the install) to 12.8 and my card is humming along fine at around 620MH/s at 1066MHz.

I have both of mine rocking on a new windows 8 install with fresh 12.8 drivers at 1150/1000MHz for 685 each on stock volts.

Why not lower the mem down to 150mhz :O

I tried using diablominer but it crashes once I open it...

I'm still running Phoenix1.75 on my 7970.. Using release date RC5 drivers because the early drivers have no issues with MSI Afterburner. I'm not sure if any other software can downclock 7970 memory properly.

My reference card is normally clocked at
GPU 925 MHz (0.955v) / MEM: 366 MHz (1.500v). Rate: 548 MH/s.

And whenever I don't care about the noise:
GPU 1200 MHz (1.167v) / MEM: 366 MHz (1.500v). Rate: 708 MH/s

Looks about right.

agreed for the reference card, but i tune them a little different. saves more on elec

930/780/0.937v  553Mh (5card rig pulls 830w)

even in commie cali we pay 0.10 per kwH how much is your electric cost?

Some Windows users have stated being able to underclock the memory by greater than 150 MHz below the core speed using MSI Afterburner. Is this simply an artifact of the software? That is, is the actual memory speed only 150 MHz below the core, but the software reads whatever the user sets it to?

I use MSI AB to lower the memory clock down to 375. This is confirmed in CGMiner, and in GPU-Z (on the sensors tab, which reads actual values). I also notice a temp and power drop when I do it. It does work.

i think i noticed something simliar. or actually id set memory to 233 and gpu-z would show 231.8 or something for example

but i think i was able to do 133 but wasn't more hashes it was less, as opposed to 1/3 of core speed or just 300 mhz
using 5970's

It does also reduce power consumption measurably. I got about 15w/card going from 685->340mhz

It is also not very easy to enable. I havent been able to reliably replicate the process. I have done it on 2 machines and cant for the life of me get it to work on the 3rd. Not quite sure what is different, I even copied the exact MSI AB files (config and bins) across.

I don't remember the numbers off the top of my heat, but with my core at 1200, moving my memory from 1050 to 325 did make a drop of about 4C. The higher your mem clocks go, the more power they use (due to higher voltages). I wanna say it was ~30W going from 1500 to 1050, and then another ~20 moving from 1050 to 375.

I got a bigger power saving from undervolting, tho. I dropped my core down to 1050, and moved the MSI AB slider to 1050mV, and the card pulls around 615MH/s @ 140W.

for MSI i would have to set it to unique for each core, then set to 500 (lowest) then it would let me set to 300, click apply then let me set to LOWER than that. a bunch of steps

Like others with MSI AB, I would have to add that DLL file to my MSI directory, then it allowed me to lower the mem clock slider a little bit, would apply the change, hit settings move to another card then come back and the slider will move even lower... with my 7970s, I generally have to play the slider game 3 times before I am set.

I think I must just have the wrong combination of AMD Linux drivers and ADL SDK. I cannot break the 150 MHz below core clock barrier, or change core voltage..

Any program setting the clocks through ADL cannot go lower than 150 below the core speed. You need a program that uses unofficial overclocking methods, which are all pretty much Windows only.

I could be wrong, but if you want lower memory speeds and/or undervolting, you can't use Linux.

You are correct.

Thanks for this information.