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Issue with GPU clock and 4890

K

KoolDrew

[H]ard|Gawd
Joined
Oct 17, 2004
Messages
1,646
It's been a while since I've done any overclocking, so I expect this is something really stupid, but I have a 4890 and I'm trying to overclock it using MSI Afterburner. However, I've noticed as I up the clock speed in it, the GPU doesn't actually change (yes, I do hit apply). According to MSI Afterburner and GPU-Z the core stays at 500MHz, even if I run a 3DMark run, it stays right at 500MHz even though it's stock is 880MHz. I've even tried changing it in the ATI Catalyst control center and same thing. On the main screen in GPU-Z it will show the new clock speed, but in the sensors tab it still only reads 500MHz.

What am I missing here? Also, I've noticed I can adjust the voltage. Any idea what would be considered safe for a 4890? Looks like max I can set it in Afterburner is 1350mV which is only 38mV higher than it is stock.
 
Do you have any kind of hardware accelerated video playing in the background? It could be Flash, Blu-Ray, or mkvs. They will force the clocks at UVD levels. Turning them off should allow the card to clock up. If that doesn't work, you could try enabling "unofficial overlcoking" in Afterburner's config files. That will turn off the ability of the card to downcast to save power.

As for the voltage level, Afterburner doesn't allow you to push the voltage high enough to kill the card as long as you have semi-decent cooling. That could be the stock cooler with a more aggressive fan curve.
 
SicKlown42012 said:
Do you have any kind of hardware accelerated video playing in the background? It could be Flash, Blu-Ray, or mkvs. They will force the clocks at UVD levels. Turning them off should allow the card to clock up. If that doesn't work, you could try enabling "unofficial overlcoking" in Afterburner's config files. That will turn off the ability of the card to downcast to save power.

As for the voltage level, Afterburner doesn't allow you to push the voltage high enough to kill the card as long as you have semi-decent cooling. That could be the stock cooler with a more aggressive fan curve.
Click to expand...

+10000

I couldnt figure out this issue with my 4890 either, until someone told me this. Make sure Firefox, Opera, IE, ETC are all closed or else any flash animations that are/were loaded will probably force the clocks to 500mhz.
 
Yup, that was it. I always have Chrome open with a bunch of websites open as well. As soon as I closed it, clocks went to where they were supposed to be.

Thanks for the replies.
 
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