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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1798

post #17971 of 38701
Quote:
Originally Posted by chino1974 View Post

I would say yes 650 watts is enough for a 3930K and a single 7970 with a full loop. You have to remember these newer gpu's are more efficient than the older gens and so are the newer cpu's. But if you could get something alil stronger for a psu I would do it. Iactually ran a 2500k oc'd to 4.8 24/7  and Crossfired 6870's on a cpu only water loop with a 550 watt psu for about 5 months with zero issues. I ended up changing rigs but if I still had it I'm sure it would've still been running fine. Right now I have a 2700k oc'd to 4.9 24/7 a single 7970 lightly oc'd and a full loop this time pluss all the fans and hue lighting running off of a 750 watt psu. I also have a second 7970 for crossfire that I decided to take out until I got a second monitor and the 750 ran both of them just fine.

Sorry for the double post. Didn't see this post until after I replied to the others. I guess I was speeding alil. biggrin.gif
Quote:
Originally Posted by antonis21 View Post

I wouldnt recommend 650w psu for these pc gear

Just to be safe, runs with higher Watts? I've OCed my matrix, but kinda capped quite low. Artifacts after 1150MHz. But, I've tested with my CPU stock, managed to get 1200MHz. So?
 
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post #17972 of 38701
Hey guys I got a short question before I buy my new equipment. I want to buy 2x the sapphire 7970 oc dual x version and run them in crossfire on asrock extreme4. Can anyone confrim, that it will fit space wise or maby suggest me better motherboard?
post #17973 of 38701
Quote:
Originally Posted by UglyCheater View Post

Hey guys I got a short question before I buy my new equipment. I want to buy 2x the sapphire 7970 oc dual x version and run them in crossfire on asrock extreme4. Can anyone confrim, that it will fit space wise or maby suggest me better motherboard?

first of all why do you want CF . what is your monitor resolution. also whats your CPU and PSU. HD 7970 overclocked to 1.2 Ghz can run even games like BF3 at 1440p maxed out at 50+ fps.
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post #17974 of 38701
How much can i overclock the Sapphire version of 7950 without watercooling?
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Harmony
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post #17975 of 38701
Quote:
Originally Posted by LifeDisturbens View Post

How much can i overclock the Sapphire version of 7950 without watercooling?

Depends on your card, but you should be able to reach 1100mhz on the core quite easily if you got the dual fan version and if you have a good airflow in your case thumb.gif
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post #17976 of 38701
Hi guys, i know i have seen it somewhere in this thread but i just want to have some confirmation about this.

Is it possible to use a reference water block for a Sapphire 7970 OC? And any comments about the Sapphire 7970 OC? Good?

Thanks in advance! biggrin.gif
post #17977 of 38701
I'm still pissed off that i Can't get above 1200mhz. Still blaming PSU not giving enough juice.
 
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post #17978 of 38701
Quote:
Originally Posted by MykaAurora View Post

I'm still pissed off that i Can't get above 1200mhz. Still blaming PSU not giving enough juice.

i cant get above 1200 either but i dont have a rog gpu just a ref 7970.
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post #17979 of 38701
Quote:
Originally Posted by MykaAurora View Post

I'm still pissed off that i Can't get above 1200mhz. Still blaming PSU not giving enough juice.

It's not the PSU. Multiple people have posted saying they haven't been able to get above 1200mhz on the 7970 Matrix, I tested 2 samples and neither would go above that no matter the settings so I returned both.

Ending up getting a Devil 7990, and it's powered by a quality 750w psu with the entire system along with the 7990 overclocked.

So it's not your PSU, just another Matrix 7970 owner added to the list that couldn't overclock higher than any normal 7970 even though you paid a premium price.

Not that it matters, but my Matrix's had a 63% and 70% ASIC rating, and my 7990 has 84% and 81% ratings.
 
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post #17980 of 38701
Quote:
Originally Posted by raghu78 View Post

first of all why do you want CF . what is your monitor resolution. also whats your CPU and PSU. HD 7970 overclocked to 1.2 Ghz can run even games like BF3 at 1440p maxed out at 50+ fps.


Well I wrote that all pretty short...
My resolution would be just 1920x1080 with an i5 3750k overclocked cpu. For now I would be happy with one card but I want to add a second 7970 sapp oc dual x one after some time, when one wont be enought. It will be my first own build so I ask if they will fit and arent too close so they warm up faster.
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