7850 2d/idle clocks

[Kralnor]

So I picked up a 7850 the other day and am quite satisfied with it so far.

Did some mild overclocking for now (only up to 1050/1200) using MSI Afterburner. The card is supposed to idle at 300/150, but both AB/GPU-Z show 300/600 in 2d-mode. I have two profiles setup in AB to switch between 2d/3d, but I can't lower the memory clock below 600.

Is it not possible to let the memory idle lower than 600 on these cards when overclocking?

 

[RooBoonix]

My Gigabyte 7850 came overclocked to 975/1200. When idle it does go down to 300/150.

Have you tried lowering the clock slightly to see if it then goes down to what you want? Might be a voltage thing to do with your OC? (Although that shouldn't affect idle but worth a shot)

Also, maybe check if your drivers are up to date? See if you are on the newest version (12.10 I think..) if not that might solve it

I may be corrected and other people will have more idea's but I just thought I would post just incase


Cam.

 

[Kralnor]

Cheers for the fast reply!

My 7850 is the Club3D Royal Queen. It doesn't come overclocked out of the box, so default clocks are 860/1200.

I'm using beta 12.11 as they give a decent performance boost over 12.10. Haven't even touched the voltages yet at all.

The thing is that the core clock always drops down to 300 on idle, no matter what I set it to using AB. However, memory won't drop below 600.

Are you using any software to overclock your card?

 

[RooBoonix]

Nope, mine just came OC'ed i havent touched the settings. I can OC more using the Catalyst Control Centre but im not going to unless i need to.

I havent tried the 12.11 beta drivers so dont know if that is the cause... Did the clock go lower before you overclocked? Also, are you using any extra software apart from the standard Catalyst Control Centre that may be limiting the down clocks?

It does sound unusual and it may be a simple issue. I'm a noob at this myself so I am trying to eliminate the simpler possibilities.

Hope you can get this sorted, maybe email the manufacturer and ask if this is normal for your card.


Cam.

 

[NZB]

Looking at my most recent 7850 from the other day just now and its idling at 300/150. Its a HIS IceQ, no factory overclock and only bumped to 1050 core through catalyst without anything else touched. MSI afterburner is running but nothing touched there either. 12.11 drivers.

 

[Defy Belief]

I think I remember someone saying this in a previous thread, it thought the card was in blu ray mode or something, a bug with the new drivers, bare with me i'll try find it.

EDIT: http://forums.overclockers.co.uk/showthread.php?t=18454165

Well I managed to fix the issue.

Apparently the card for some strange reason was running in Blu-Ray mode (500Mhz/1250Mhz @ .93v) when idle.

Took core to 300 and memory to 150 manually and saved the preset as 2D Clocks and the card now idles @ 34*C so I think it's driver related.

 

[Kralnor]

I think I remember someone saying this in a previous thread, it thought the card was in blu ray mode or something, a bug with the new drivers, bare with me i'll try find it.

Just did a quick search and might be right. It seems that people are having trouble with their cards not downclocking correctly with the 12.11 drivers.

EDIT: Cheers for the link, I can't lower my memory clock manually below 600 in neither CCC nor in Afterburner though.

I suppose as long as the core is downclocking correctly, I won't bother spending more time on trying to fix it as memory clocks shouldn't affect temps or power consumption too much. I'll see if the release version of 12.11 fixes things once it's out.

Thanks for the help guys.