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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1554

post #15531 of 38740
Quote:
Originally Posted by tsm106 View Post

It's better to disable powerplay than to force voltage.

Where is this "Powerplay" - I'm using afterburner

Also a general question, on the 7 series is overclocking memory even worth it? I barely even see an improvement redface.gif
post #15532 of 38740
It's worth it if you play at high resolutions with all the settings up. Adds fps in GW2, for example, because I use my card to power a 1440p monitor. Might not make much of a difference if you use a low resolution monitor.
   
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post #15533 of 38740
Well after getting my second 7970 I have to say I'm quite dissapointed. I wasn't expecting my I7 930 to be this severe of a bottleneck. In metro 2033 bench I was getting as low as 50% gpu usage on each gpu and my overall score only went up about 30%. Crysis is even worse, hardly changed at all, and bf3 is around 60-70% on each gpu. Maybe a 20-25% improvement.

I tried droppin my cpu from 3.8 to 2.7ghz to see if that was the prob and sure enough metro usage dropped as low as 30%.

Is a 3.8ghz I7 930 really that weak? Is there any CPU that can power CF 7970s? I know 2500k is a bit more powerful but only around 30% i think, so even that couldn't power 2 7970s going by the gpu usage I'm getting now. How bout 3770k or such. Is there anything that can power these beasts?
    
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post #15534 of 38740
Quote:
Originally Posted by Bluemustang View Post

Well after getting my second 7970 I have to say I'm quite dissapointed. I wasn't expecting my I7 930 to be this severe of a bottleneck. In metro 2033 bench I was getting as low as 50% gpu usage on each gpu and my overall score only went up about 30%. Crysis is even worse, hardly changed at all, and bf3 is around 60-70% on each gpu. Maybe a 20-25% improvement.
I tried droppin my cpu from 3.8 to 2.7ghz to see if that was the prob and sure enough metro usage dropped as low as 30%.
Is a 3.8ghz I7 930 really that weak? Is there any CPU that can power CF 7970s? I know 2500k is a bit more powerful but only around 30% i think, so even that couldn't power 2 7970s going by the gpu usage I'm getting now. How bout 3770k or such. Is there anything that can power these beasts?

You can probably hit 4.2. Make sure you have ccc settings for application default. I know there's a setting that will drop gpu usage if enabled (forgot what it was and I don't have rig up and running to confirm).
post #15535 of 38740
Quote:
Originally Posted by wermad View Post

You can probably hit 4.2. Make sure you have ccc settings for application default. I know there's a setting that will drop gpu usage if enabled (forgot what it was and I don't have rig up and running to confirm).

I could if vcore was the only factor. This cpu seems good and doesn't require much voltage at all. But it does require a lot of QPI voltage. 1.295v for 3.6ghz then all the way up to 1.335v for just 3.8ghz on the QPI which from what I read is the limit before it's no longer safe.
    
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post #15536 of 38740
To answer your question, a 2500K will definitely handle two 7970's as will a 3770K. My GPU usage is always at 99% on both... biggrin.gif
post #15537 of 38740
Quote:
Originally Posted by Majin SSJ Eric View Post

To answer your question, a 2500K will definitely handle two 7970's as will a 3770K. My GPU usage is always at 99% on both... biggrin.gif
You got a 3960 lol
    
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post #15538 of 38740
I was just messing with you. Should get 99% from any overclocked SB in my opinion...
post #15539 of 38740
Quote:
Originally Posted by Majin SSJ Eric View Post

I was just messing with you. Should get 99% from any overclocked SB in my opinion...


2500K at 5ghz couldn't keep tri 7970s pegged in BF3, back in the day. It ran around 55% to 80%. The HT really made a difference on MP servers. He's only using two cards so he should be good though.
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post #15540 of 38740
Sapphire 7950 OC @ stock. Heaven settings as required by *OFFICIAL* Top 30 Heaven Benchmark 3.0 Scores


Edited by tw33k - 9/8/12 at 6:14pm
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