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Just got a couple HIS 7970s in from newegg and I'm having trouble setting clocks on the second card.  The second card stays at 500/150 and .95v . I've tried with cgminer and afterburner but no success. Cgiminer says successfully changed settings, but clocks stay the same. Trying to set 1100/950 core to mem. I've tried Catalyst 12.4 and 12.3. Is this AMD's new smart technology disabling the second card when the system thinks it's not in use? What's the trick?

Close youtube

Yes, flash video hard sets the clock rate at some bizarre value. Flash is one of the few technologies with even more fail than AMD drivers.

if the problem is flash then right click on a flash video go to setting and disable hardware acceleration then  the clocks will no longer be locked. Videos still play fine.

I cant agree more.

Adobe is trying hard to build their empire.

Your card is in UVD mode, which automatically enables when you are using your hardware to decode video. This includes almost any flash popup on websites (youtube, newsground games, etc). Close your browsers and videos or disable hardware acceleration.

Hmm, interesting. This is a fresh windows install and I haven't installed flash yet. The first time I booted up
IE, I do remember answering yes when asked if I wanted to enable AMD hardware acceleration. Perhaps that puts the card in a bad state, even though I'm not running IE when I start cgminer. I'll try disabling it and give it another shot.

You need to disable ULPS.

Just search through the registry and set all the EnableUlps to 0

I had the same issue yesterday when I was setting up another rig with 7xxx cards.  Seems like Catalyst 12.4 broke 3D clocks with additional cards.  Had to run ATIMan Uninstaller and installed 12.3 which are running much better.

This. It can be done by Sapphire TRIXX software.

Disabled hardware acceleration in IE9, made sure it it was closed when running cgminer, no luck... Disabled ulps by setting 4 reg keys to 0 (2x EnableUlps 2x EnableUlps_NA) no luck there either. Going to try fresh Windows image with 12.3 next.

Maye try sapphire trixx. While i do prefer msi after burner. Trixx is able to do things that afterburner cannot. for example if have a 5870 that ab cannot change the voltages, but trixx can.

I've mined with 5830s, 5870s, 5970s, 6950s, 6970s, and 6990s and never run into an issue setting clocks on the second card. When I tested with 12.3 it was after swapping out a couple 6970s. I couldn't set the clocks on either card at that point. To be safe, I did a fresh windows install and installed 12.4 since it had just came out. I'm more inclined to believe there is an issue with the drivers bundled with 12.4 so I'm going to do another fresh windows install and go straight to 12.3. I'll let everyone know how it goes.

12.3 did the trick. Well, kind of. Now I can set the Engine clock but not the mem clock on GPU 2 with cgminer (Mem stuck at 1375) ... I'll play around with some other clocking apps.

I love how AMD release drivers which fixes some things (LOD texture issues) but breaks other things (lowered mining performance, cant set clocks)...

If NVIDIA had something half as efficient as AMD I would buy it in a heartbeat.

I don't think either of them really care about mining. Not defending either company but didn't nvidia release a driver for the 280 a couple years ago that physically damaged the gpu?

Went all the way back to 12.1 and now I can set mem clocks on second card. Running at 76 and 71 degrees, is the 150 mhz diff limitation only for cgminer?

I can set mem clocks and voltage (no 150 MHz diff) on 12.3 with ULPS disabled and MSI Afterburner. Haven't tried 12.4.

Maybe you try the latest Afterburner imho 2.2. beta.
I tryed Trixx bevor and i must say, i do it better not. Maybe its because i got Afterburner already, but i disabled it for testing Trixx. Had massive probs with trixx.

I just confirmed with one of my 4x7970 rigs that version 12.4 with more than one 7970 requires a dummy plug to resolve this issue. I had a few lying around and thought i'd recreate the issue described here.

Cheers

Did you try using a plug after you disconnected the monitor?

nope, but that is a great idea. i will give it a try.

what i did before was just turn it off.

Why bother with the plugs. There's no performance gain with 12.4 over 12.3

I suggest you uninstall 12.4 and install 12.3. You can use the uninstall program. You don't need to erase everything and install 12.3. It took me 5 mins to do it.

Cheers