For those who haven't succeeded in restoring overclocking ability, a windows re-install would probably fix the issue. I would recommend first installing the Network and ATI drivers first, and see if overclocking is restored. If so, install the rest of the drivers one by one (rebooting each time) to see if everything is still working as it should.
If overclocking is disabled after a driver (and/or utility) was installed, first try uninstalling it and see if functionality is restored. If so, either skip that driver if its not a huge deal (USB3 for example), or try a manual install with .inf files instead.
Topic: Sapphire 7950 not allowing overclock (Read 3183 times)
This seems to happen if you try to use trixx AND afterburner. I just stuck with afterburner, unlocked the volate in settings and haven't had a problem since.
I'm having similar issues with my Sapphire 7950 OC card after a restart. Only difference is I can overclock but I have lost the ability to use MSI AFterburner to underclock the memory more than 150 mhz less than the core clock. I've tried all kinds of shit and it's bout pissed me off to the max. Pretty much gave up. Installing the newest drivers as we speak, but I doulbt anything changes...at least for the better. 
Did you put that special ATI dll file inside the Afterburner folder? For me, I have to restart Afterburner several times to underclock the memory that far on my Sapphire 7950 OC.
Let's say I reboot:
Stock memory of 1250, can move it down to 600
close and restart afterburner
can set it to 300 something
close and restart afterburner
can set it to 155. also shows up in trixx now.
Make sure ULPS is turned off.
You have a driver clash between something and CCC. Also, did you install AMD SDK?
If this is a dedicated mining rig you need to fresh install, then mobo drivers with no bloatware, then net 4 framework, then CCC, then amd sdk, then msi afterburner as trixx actually is lame, then cg miner.
If this is not a dedicated rig, you have to find what program is crashing the overclock drivers. There is no easy way except a fresh install.
If this is a dedicated mining rig you need to fresh install, then mobo drivers with no bloatware, then net 4 framework, then CCC, then amd sdk, then msi afterburner as trixx actually is lame, then cg miner.
If this is not a dedicated rig, you have to find what program is crashing the overclock drivers. There is no easy way except a fresh install.
I don't have the overdrive option under the ATI control panel. I've uninstalled the ATI drivers, rebooted, reinistalled new drivers, rebooted, etc.
http://farm9.staticflickr.com/8263/8707243773_04023329ff_d.jpg
Even with the current ATI drivers, no software seems to be getting the GPU clock, mem clock, GPU temp information from the card:
http://farm9.staticflickr.com/8277/8707243625_1ac87b3635_d.jpg
I assume this is why TRIXX can't overclock the card (nor can CGMINER).
Any ideas?
http://farm9.staticflickr.com/8263/8707243773_04023329ff_d.jpg
Even with the current ATI drivers, no software seems to be getting the GPU clock, mem clock, GPU temp information from the card:
http://farm9.staticflickr.com/8277/8707243625_1ac87b3635_d.jpg
I assume this is why TRIXX can't overclock the card (nor can CGMINER).
Any ideas?
Eventually all 24 of my rigs did this. It was from a driver clash between CCC and virtu MVP. If your using an asrock mobo as I am, uninstall virtu, uninstall you OC software, reinstall CCC and reset. Bam fixed.
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I'm having similar issues with my Sapphire 7950 OC card after a restart. Only difference is I can overclock but I have lost the ability to use MSI AFterburner to underclock the memory more than 150 mhz less than the core clock. I've tried all kinds of shit and it's bout pissed me off to the max. Pretty much gave up. Installing the newest drivers as we speak, but I doulbt anything changes...at least for the better.
Check in GPU-Z what you can see - rules out a pure software cause.
If its not showing much its at a driver level. Try a CLEAN install = uninstall, restart, restart, uninstall default, restart and install actual.
If its not showing much its at a driver level. Try a CLEAN install = uninstall, restart, restart, uninstall default, restart and install actual.
Having same issue with a Sapphire 7850 - and can't seem to adjust any of the overclock settings. I tried several of the overclock apps, even tried triXX, but it just shows "0" for clock speed and memory speed, and if I hit "+" it goes to 1 and then back to zero. (VGA SAPPHIRE|100355-1GOCL HD7850 1G)
Restarted three separate LC rigs, but when the booted back up I have lost the ability to OC with Trixx. No fan control, not temp, and sliders on clock show zero.
WTF? I have literally unistalled and reinstalled everything including drivers, CCC, SDK.. All to no avail.
Ever happened to anyone?
Any ideas on how to fix this?
WTF? I have literally unistalled and reinstalled everything including drivers, CCC, SDK.. All to no avail.
Ever happened to anyone?
Any ideas on how to fix this?
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