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Clock Speed Doesn't Stay MAX during benchmark/burn-in testing

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October 30, 2013 7:40:17 PM

Is it normally when my clock speed doesn't stay at max while doing benchmark/burn-in testing?
I have the same situation during both stock speed (gigabyte 7950 @ 1000 mhz) and OC (@ 1200 mhz)

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October 30, 2013 7:48:50 PM
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You can try disabling ULPS to prevent this, but the card is throttling, which is normal.

Another solution that may work is to raise the "Power control" meter under AMD Overdrive. This will allow the card to pull more power as needed and effectively raise the throttle level.

Note: if it's doing this during benchmarks, it's likely doing it during gaming, too.

Just keep an eye on your temps. 75C and below is safe; over 80C you're pushing it.
October 31, 2013 10:14:26 AM

I see... Thanks a lot...
A question about throttling.....

Is that the card feel itself not stable at higher clock, and so throttling its spd at 900mhz?

My card come in as 1000mhz designed....how could it happen to my card? Does it mean my card is defective?

One thing I didn't state clearly in my first msg is...it climb to 1200mhz, but it will fluctuate, back into 900, then jump back into 1200..back and forth.during the test. Would it make any change to your statement of throttling before? (not challenging, just make sure all factors are considered.)

Thanks a lot for your help~
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October 31, 2013 12:22:13 PM

soup1207 said:
I see... Thanks a lot...
A question about throttling.....

Is that the card feel itself not stable at higher clock, and so throttling its spd at 900mhz?

My card come in as 1000mhz designed....how could it happen to my card? Does it mean my card is defective?

One thing I didn't state clearly in my first msg is...it climb to 1200mhz, but it will fluctuate, back into 900, then jump back into 1200..back and forth.during the test. Would it make any change to your statement of throttling before? (not challenging, just make sure all factors are considered.)

Thanks a lot for your help~


Two things will cause variation in clock speed: throttling due to heat and/or power consumption (both of which can be alleviated by the steps in my last post) or processing demand (the amount of work the program is asking the card to do).

Neither is bad, but getting past the throttling bottleneck will give you the best performance. Processing demand is simply going to vary by program and isn't a function of the card itself.
October 31, 2013 2:53:33 PM

Christopher Shaffer said:
soup1207 said:
I see... Thanks a lot...
A question about throttling.....

Is that the card feel itself not stable at higher clock, and so throttling its spd at 900mhz?

My card come in as 1000mhz designed....how could it happen to my card? Does it mean my card is defective?

One thing I didn't state clearly in my first msg is...it climb to 1200mhz, but it will fluctuate, back into 900, then jump back into 1200..back and forth.during the test. Would it make any change to your statement of throttling before? (not challenging, just make sure all factors are considered.)

Thanks a lot for your help~


Two things will cause variation in clock speed: throttling due to heat and/or power consumption (both of which can be alleviated by the steps in my last post) or processing demand (the amount of work the program is asking the card to do).

Neither is bad, but getting past the throttling bottleneck will give you the best performance. Processing demand is simply going to vary by program and isn't a function of the card itself.


Would disabling ULPS cause the card much hotter or much more power consumption?

To raise the power consumption, I m not sure if it's safe to do so since my card max volt is at 1.25 already at default. Do you know 7950's limitation? I am using gigabyte.

Thanks,

Ricky
October 31, 2013 9:25:42 PM

soup1207 said:
Christopher Shaffer said:
soup1207 said:
I see... Thanks a lot...
A question about throttling.....

Is that the card feel itself not stable at higher clock, and so throttling its spd at 900mhz?

My card come in as 1000mhz designed....how could it happen to my card? Does it mean my card is defective?

One thing I didn't state clearly in my first msg is...it climb to 1200mhz, but it will fluctuate, back into 900, then jump back into 1200..back and forth.during the test. Would it make any change to your statement of throttling before? (not challenging, just make sure all factors are considered.)

Thanks a lot for your help~


Two things will cause variation in clock speed: throttling due to heat and/or power consumption (both of which can be alleviated by the steps in my last post) or processing demand (the amount of work the program is asking the card to do).

Neither is bad, but getting past the throttling bottleneck will give you the best performance. Processing demand is simply going to vary by program and isn't a function of the card itself.


Would disabling ULPS cause the card much hotter or much more power consumption?

To raise the power consumption, I m not sure if it's safe to do so since my card max volt is at 1.25 already at default. Do you know 7950's limitation? I am using gigabyte.

Thanks,

Ricky


Raise the power control will not overheat the card, neither will disabling ULPS.

ULPS is just meant to conserve power (mostly in Crossfire for the 2nd card) and the power limit would only be a concern on an overclocked card.

If you're running the card at stock speeds, you'll be fine. If you've raised the GPU speed 10%, raising the power level 10-12% is a good idea to prevent it from being under powered.

Just make sure you're temps are staying below about ~78C and you're good.

Raising the power control won't raise the voltage to an unsafe level; only manually adjusting voltage would and there's no need to do this.
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