Help with overclocking a 7970

[TheMorningStar]

Download GPU z 5.8, open it and click top left then select get asic quality.

I'm guessing it will return 75% which means it'll need more voltage.

I like this tool, I find its implications very interesting. That being said at the moment I wouldn't refer to it for any other reason than general interest, it's buggy and many of its results seem nonsensical.

 

[djay]

Not on my version (2.2.0 beta 10). Is there an option to toggle in the config file?

There is a little up arrow next to the core clock settings click that and it appears. I will get a screenshot later as I'm on my phone at the moment sorry.

 

[Awahwah]

There is a little up arrow next to the core clock settings click that and it appears. I will get a screenshot later as I'm on my phone at the moment sorry.

No need Djay, but thanks for all your help. I need the BETA 11 version Sorted now.

 

[djay]

No need Djay, but thanks for all your help. I need the BETA 11 version Sorted now.

Excellent good stuff. And i have my memory voltage at 1625 not 1650 as originally mentioned. It all works perfect at them settings and dont really need any more. Would be nice to have that all set in the bios though as opposed to using these utilities

 

[tribz]

Hi, I also have the xfx 7970 and in order for me to get the 1125 Core and 1575
Memory I had to up the core in Msi AB to 1.175Vcore and 1650 memory voltage (1600) default. The xfx seems to have low vcore set as default. It would be nice to be able to flash a bios with these settings.

I have done quite a lot of messing around and my card will clock happily to 1200mhz using 1.2vcore in AB but in all honesty it's probably not really noticeable. You will need too check that the clocks and voltage settings have been applied using gpuz as I believe this is the only reliable monitor currently. Hope this helps.

That works thanks, I've put the core voltage to 1174mV and I've just done 2 runs of Vantage ok at 1125MHz Core / 1575MHz Mem. Temps increased by about 6c to 77c. I'll scale back the mV a bit now to see if I can get it stable at lower.

 

[djay]

Excellent. I think the default vcore is 1174 normally but XFX clock them lower? Not sure if thats 100% but sure I read that somewhere. Under GPUZ it shows the vcore at around 1.6 anyway so it's still under the default.

With regards to the temps, I have set the fan profile to manual in AB and it keeps it around 65c.

 

[pugheaven]

Excellent good stuff. And i have my memory voltage at 1625 not 1650 as originally mentioned. It all works perfect at them settings and dont really need any more. Would be nice to have that all set in the bios though as opposed to using these utilities

Download a BIOS Editor edit the fields, upload and hope for the best

 

[ALXAndy]

Why overclock it?

not like any games challenge it

Mine is the same. I didn't bother in the end. I felt dirty overclocking a card that doesn't need it

I got 1ghz stable though.

I also get a bug with CCC. Basically when my PC starts CCC turns on manual fan and puts it to 100%. Doesn't matter how many times I put it back (and let AB take over with my profile) it keeps going back to manual when I reboot

 

[djay]

Download a BIOS Editor edit the fields, upload and hope for the best

Radeon Bios Editor does not currently support the 7970 bios. Unless you know of another program i can't at the moment.

 

[oweneades]

Excellent. I think the default vcore is 1174 normally but XFX clock them lower? Not sure if thats 100% but sure I read that somewhere. Under GPUZ it shows the vcore at around 1.6 anyway so it's still under the default.

It isn't a case of XFX "clocking" the voltage lower it is the fact that there is more than one default VID for the HD7970.

IIRC there is:

1.05
1.112
1.175

My Powercolor HD7970 has a default VID of 1.112 and needs voltage increasing to 1.175 to make 1125 core stable.

Overclocking the HD7970 has proven to be very interesting so far. I have found that the higher you clock the less tolterant the VRM becomes to heat (ie at 1125 I need to ensure the card stays cooler than when clocking at 1075).

Actual overclocks an the methods are quite difficult to pin down at the moment as there is lots of confusion around the "true" voltage required and potential limitations.

 

[old gamer]

just checked my xfx voltage with afterburner and that shows 1.112