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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1695

post #16941 of 38704
Quote:
Originally Posted by Benevolence View Post

Hello all, potential 7970 crossfire owner here. So as many of you owners (and potential owners such as myself) would know, there have been countless reviews arguing that SLI is "smoother" than xfire despite 7970 xfire setups pumping out more frames. They do not offer any explanation other than it "feeling" smoother despite lower frames. This made me dubious, but upon further investigation there are actually a lot of users who have also claimed this and then there are charts like this http://forums.anandtech.com/showpost.php?p=33714178&postcount=156 So it seems that the reviewers weren't just being biased.
I also noticed that many of these reviews were way back in March/May and I found that the AMD drivers had come a long way since then. Has this smoothness issue been fixed? Cos if so then it's an easy choice, more frames + equally smooth. Thanks, guys, would appreciate your input very much so.

Welcome to OCN! thumb.gif

There really isn't any smoothness factors. That's just a subjective term with their minds playing tricks on them. People used to say the same thing about ATI/AMD cards having better quality image versus Nvidia cards and we all know both are pumping out the same thing.

The only worry you should have would be microstuttering and that is uncommon these days. Just make sure you're not trying to CF those 7970s on an AMD platform or else you would be facing a lot of bottlenecking and would result in your GPUs running at 50~60% usage.
    
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post #16942 of 38704
Quote:
Originally Posted by shredded View Post

Anyone have any insight? Could i need more voltage on my overclocks??? I had my memory at 1575 at 1.5v as well as the core at 1100mhz @ 1156mV

Never saw 1.5v memory on 7950, set it to 1.6 and see how it goes?
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post #16943 of 38704
Quote:
Originally Posted by Kokin View Post

Welcome to OCN! thumb.gif
There really isn't any smoothness factors. That's just a subjective term with their minds playing tricks on them. People used to say the same thing about ATI/AMD cards having better quality image versus Nvidia cards and we all know both are pumping out the same thing.
The only worry you should have would be microstuttering and that is uncommon these days. Just make sure you're not trying to CF those 7970s on an AMD platform or else you would be facing a lot of bottlenecking and would result in your GPUs running at 50~60% usage.

Nvidia uses frame metering to counter the stutter of multi GPU systems. AFAIK, AMD does not. What kind of advantages and disadvantages this frame metering has in real life situations is debatable, but it is a distinctive difference between Nvidia and AMD multi GPU systems.
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post #16944 of 38704
Quote:
Originally Posted by psyside View Post

Never saw 1.5v memory on 7950, set it to 1.6 and see how it goes?

Really??? Wow, here i was thinking 1.5 was a lot. It is currently at 1575 @1.531V and all seems fine. Played Skyrim and had no worries, but the real test will be BF3. To bad Ea is... you get the idea. Cant connect to the server, tried for 15 mins before i gave up. "could not connect to ea online".mad.gif load of manure
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post #16945 of 38704
Quote:
Originally Posted by rck1984 View Post

64c is nothing and perfectly fine. Your good upto around 80c.
Voltage wise you can go upto about 1.25v but keep an eye on the temps, crank up your fan speed if needed.
You got some headspace with those clocks and 1.150v/64c.

Okay, Thanks i was a little worried as this is my first rig. The last computer i had was a laptop with a core 2 duo and a 9300m gs.
Is an Asic score of 79% good?
also i have a 600w PSU, does that factor in anywhere?
    
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post #16946 of 38704
Quote:
Originally Posted by specopsFI View Post

Nvidia uses frame metering to counter the stutter of multi GPU systems. AFAIK, AMD does not. What kind of advantages and disadvantages this frame metering has in real life situations is debatable, but it is a distinctive difference between Nvidia and AMD multi GPU systems.

you need horsepower, so if you are playing at 5760x1080 for example then trifire makes more sense if you get fps limited with crossfire.
microstuttering always happens but the effect lessens the more fps your able to crank out.
the options are to either lessen visual settings to get more fps to sync better or get more cards.

the crossfire rig I did run could feel slow in spite of having 90fps.
I was feeling it and now with a single 7970 same fps or lower higher setting, none of it is present.

so using 4 cards for Bf3 running 180fps in 5760x1080 makes sense.
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post #16947 of 38704
Quote:
Originally Posted by flopper View Post

you need horsepower, so if you are playing at 5760x1080 for example then trifire makes more sense if you get fps limited with crossfire.
microstuttering always happens but the effect lessens the more fps your able to crank out.
the options are to either lessen visual settings to get more fps to sync better or get more cards.
the crossfire rig I did run could feel slow in spite of having 90fps.
I was feeling it and now with a single 7970 same fps or lower higher setting, none of it is present.
so using 4 cards for Bf3 running 180fps in 5760x1080 makes sense.

That's true. People shouldn't be blinded by 90% CF scaling numbers, if going crossfire requires you to have a much higher frame rate to get a similar gaming experience to a single card.
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post #16948 of 38704
Okay i have a powercolor PCS+ 7950, and i had it OC'd to the specifications i mentioned previously, i was playing payday the heist because it's free this weekend on steam (y)
part way through the game i decided to turn one setting up, and suddenly the fan made a sound like it was grating against something and the display wasn't registering a signal from the PC.
I hard shut it down asap because i want to prevent damage to it and the sound it was making was quite sudden and quite loud.
Anyone got any idea what just happened?
    
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post #16949 of 38704
Any tips to trying to get voltage control on the ghz bios i have flashed it a few times and never get voltage control funny thing the voltage it shows in msi-ab is way to low then what it uses also.
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post #16950 of 38704
Hi everyone
I just bought a HIS 7970 and the pcb is blue, i plan on putting this card under water and need to know if this is the reference pcb or if i need to return this this is the one i bought.
http://www.amazon.com/HIS-Eyefinity-Mini-Displayport-Graphics-H797F3G2M/dp/B006O714FI/ref=sr_1_6?ie=UTF8&qid=1350662807&sr=8-6&keywords=hd+7970
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