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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 501

post #5001 of 38701
Trying a few combinations to see if I can rectify my shadow draw-in issue with BF3. Installed the latest drivers (8196) and I don't have a CCC to use it seems.
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post #5002 of 38701
Quote:
Originally Posted by crunkazcanbe View Post

This is just my opinion but I would use no less then a 1kw psu for even 2 7950s cause if your overclocking your gpus and cpu @ the same time the more headroom the better i imagine you are putting alot of strain on your psu.

Sorry, but this is just ridiculous misinformation. I am running crossfired 7970's at 1100/1400, a 2500k at 4.5gHz, a few case fans, fan controller, and cold cathodes absolutely fine on a Crosair TX750 v2 psu with zero problems. The 7970's, even with a fairly mild overclock, draw less power than my 570's did. Crossfire 7950's draw even less power, I would imagine. 1000w psu is overkill. Any good quality 750w psu will be fine.
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post #5003 of 38701
Quote:
Originally Posted by Denca View Post

Can you please tell me what programs were you using and how?
Thanks

Here's Dirt 3 Benchmark running. 3dmark11 pulls 790w during the first graphics test. This is at 1200/1600 on 2 7970's and a 2500k @ 5ghz. 2 Vertex 3 ssd's in Raid 0 and 1 Dvdrw drive. 1 pump and 4 120mm R4's. I've been pulling 750w+ on many games with these settings.
700
Edited by Hambone07si - 2/26/12 at 5:16pm
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post #5004 of 38701
I have afterburner set to have 2d and 3d profiles so I have lower clocks and voltages when I am not playing games to keep it cool, quiet and have minimal power drain. I have noticed that whenever it switches profiles (on or off) I get a split in my screen for a fraction of a second like screen tearing in a video game. Does anyone know what this is and if it is a problem or should I just ignore it and go about my business? Every game I play runs silky smooth and the card is extremely stable... it just makes me wonder what the hell is going on with that screen tear. I am thinking it has to do with the large jump in the speed of the memory, but don't exactly know enough to pin point why it is going on.

Thank in advance for your comments.
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post #5005 of 38701
Quote:
Originally Posted by crunkazcanbe View Post

I personally would not do 1.281V on air 1.2v to me is as high as i will go.

Up to 1.3v is absolutely fine on air for this core. I run 1.3v @ 1300/1700 without any issues, and temps are just fine.
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post #5006 of 38701
Quote:
Originally Posted by crunkazcanbe View Post

This is just my opinion but I would use no less then a 1kw psu for even 2 7950s cause if your overclocking your gpus and cpu @ the same time the more headroom the better i imagine you are putting alot of strain on your psu.

Do you know anything about PCs whatsoever? You're here in an AMD forum writing dozens of posts blasting AMD's drivers and their cards... just sell the damn things if they're that much of a problem, and buy 2 580s ffs.

And NO, you do NOT need a 1kw PSU for 2 7950s. I ran THREE 6970s @ 1.3v on an 850W PSU for over a year. 7950s are way more power efficient than 6970s, so your estimate is WAY off. You could run 3 7950s on an 850W if you absolutely wanted to.

Do NOT spread misinformation as fact. If you don't know what you're talking about, do not give advice here. You're going to cause newbies to this forum to spend WAY more on hardware than they need to. I absolutely can't stand when people state incorrect information as fact, when they themselves don't have the experience or haven't personally tested such a setup.
Edited by m3t4lh34d - 2/26/12 at 5:28pm
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post #5007 of 38701
You could run 2 7970's on a nice 750w if you wanted. Something like the AX750, but you would have to get extra pci-e wires. Any 850w psu that comes with 4 pci-e connections will run 2 of those with no problems. I have yet to see 800w from the UPS/wall from my setup. It pulls a little more from the wall then the pc actually pulls too. 1000w is just extra headroom at ease. You would have nothing to worry about with that, but you wouldn't have anything to worry about at all with a AX850 either.

Playing some games in Eyefinity only uses around 600w on this setup also. System idles at 288w wth.gif
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post #5008 of 38701
Its worth bearing in mind that one 750w PSU design may be fine where as another fails. This is where a lot of PSU arguments come from and its due to the fact that the "750w" is not usually available on all rails, so if you have say, 400w on the PCI-E connector rail and 350w split up between others, you can still run into problems.

The numbers alone, dont tell you much at all sadly.
Quote:
Originally Posted by m3t4lh34d View Post

I absolutely can't stand when people state incorrect information as fact.

To be fair to him, he did clearly state in his opening words "This is just my opinion"
Edited by Stu-Crossfire - 2/26/12 at 5:44pm
post #5009 of 38701
Quote:
Originally Posted by m3t4lh34d View Post

Do you know anything about PCs whatsoever? You're here in an AMD forum writing dozens of posts blasting AMD's drivers and their cards... just sell the damn things if they're that much of a problem, and buy 2 580s ffs.
And NO, you do NOT need a 1kw PSU for 2 7950s. I ran THREE 6970s @ 1.3v on an 850W PSU for over a year. 7950s are way more power efficient than 6970s, so your estimate is WAY off. You could run 3 7950s on an 850W if you absolutely wanted to.
Do NOT spread misinformation as fact. If you don't know what you're talking about, do not give advice here. You're going to cause newbies to this forum to spend WAY more on hardware than they need to. I absolutely can't stand when people state incorrect information as fact, when they themselves don't have the experience or haven't personally tested such a setup.

If you had eyes maybe you could read . I was not blasting their cards at all matter of fact further back I said "I love the cards man they are beasts no lie easy to see" . although I was blasting there cpus but so what. So go read and look further back @ everything I said not just what you want to read. I think it is really clear not just on these forums but lots of others that alot of people dont like the drivers and or having probs I have seen a few that dont I know. Also AMD requires you to have a 700 Watt power supply unit as minimum for crossfired 7950s. So like I said overclocking cpu and gpus and not counting everything else in his pc is kinda pushing it in my eyes . I like headroom on my psu , once again that is my opinion.
Edited by crunkazcanbe - 2/26/12 at 7:38pm
post #5010 of 38701
Quote:
Originally Posted by crunkazcanbe View Post

If you had eyes maybe you could read . I was not blasting their cards at all matter of fact further back I said "I love the cards man they are beasts no lie easy to see" . although I was blasting there cpus but so what. So go read and look further back @ everything I said not just what you want to read. I think it is really clear not just on these forums but lots of others that alot of people dont like the drivers and or having probs I have seen a few that dont I know. Also AMD requires you to have a 700 Watt power supply unit as minimum for crossfired 7950s. So like I said overclocking cpu and gpus and not counting everything else in his pc is kinda pushing it in my eyes . I like headroom on my psu , once again that is my opinion.

Also let me quote myself I have been building pcs for a while now I own my on pc repair shop I build anywhere from 2-6 pcs aday so yeah I do know what im talking about.
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