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Crossfire a amd 6990 and 6950 or 6970

Last response: in Graphics & Displays
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April 15, 2011 3:57:38 PM


Gents, any thoughts on if it's possible to Xfire a 6990 with a 6970 or 6950? I'm just thinking if you can do tri-xfire/sli can you do a setup like that?

I have a 1000w powersupply and I don't think it can handle 2 6990 nor do I want to spend quite that much but i'd spend 300.00 on a 6950/70.

Thanks!

a b U Graphics card
April 15, 2011 4:00:26 PM

none, crossfire drivers suck go for a 6970
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a c 214 U Graphics card
April 15, 2011 4:02:32 PM

Scaling with the 6990's aren't good at all right now I suggest tri-fire with 6950's.
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a c 214 U Graphics card
April 15, 2011 4:06:50 PM

As you can see in both these reviews their isn't really any point to getting a 6990 crossfire.In fact you actually become more CPU dependt with the corssfire than a single card making the corssfire performance do worse than a single card.

http://www.techpowerup.com/reviews/Powercolor/Radeon_HD...

http://www.guru3d.com/article/his-radeon-hd-6990-crossf...

But to answer your question yes you can crossfire an 6990 with a 6970/6950.Technically the 6990 is x2 6970s in one card so theirs no reason they shouldn't recignize each other.
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April 15, 2011 7:34:25 PM


It works! Bumped my Heaven bencemark @1920x1080 maxed out to 2950. :pt1cable: 

I know, no need for it, I can't stop modding my dang computer!
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a c 214 U Graphics card
April 15, 2011 7:37:59 PM

If you want to mod put some cathodes in it.

What case do you have?
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April 15, 2011 9:03:30 PM

purple stank said:
If you want to mod put some cathodes in it.

What case do you have?



Nice Corsair full-mid, good build quality but lacks side window/vent. About to fix that though. It allows full size room without the huge footprint.
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a c 214 U Graphics card
April 15, 2011 9:27:02 PM

You can always make/buy side windows if need be.Lights really do add to the overall affect,imo.
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Best solution

April 15, 2011 9:44:15 PM

http://www.hardocp.com/article/2011/04/11/amd_radeon_69...

yes, it works. and quite well, actually. They even saw hints of the processor limiting the GPU performance and it was an i7 920 at 3.6ghz.

Dadiggle, compare the prices of the videocards.

~$700 for 6990 + $340 6970 = $1040 you can even get the price lower by just buying a 6950 2gb and using the nifty bios feature to flash it to a 6970.

580 is $490x2 = $980

Think they were trying to get into the same ballpark with regards to price/performance. The 590 wouldn't really count considering it's limited supply (good luck finding one), the price and it's still second in performance to the 6990.

Comparing a 590 would have been idiotic seeing as how it's already slower, it's been done (compared to the 6990, that is) and you can't find it out in the wild. An endangered species more suited to a trophy case than your PC. The point of the article was for ~$1000 you're getting more out of an amd 6990+6970 crossfire (really trifire) than you would be with a 580x2 for the same price range. The fact that Nvidia is skimping on the ram on their cards hampers the users who use multiple monitor setups and extremely high resolutions has nothing to do with hardocp nor AMD. That's nvidia cutting costs and overcharging for their cards.
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April 15, 2011 9:58:25 PM

Best answer selected by templarklimek.
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April 15, 2011 10:00:01 PM

purple stank said:
You can always make/buy side windows if need be.Lights really do add to the overall affect,imo.



wow, your case looks really good, I'm having a fan/window hole cut and a fan installed right now. I wish i had just gone with full size case with side fan now. This is a quality case, I just wanted the additional airflow over the cards.
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April 15, 2011 10:01:23 PM

pelov said:
http://www.hardocp.com/article/2011/04/11/amd_radeon_69...

yes, it works. and quite well, actually. They even saw hints of the processor limiting the GPU performance and it was an i7 920 at 3.6ghz.

Dadiggle, compare the prices of the videocards.

~$700 for 6990 + $340 6970 = $1040 you can even get the price lower by just buying a 6950 2gb and using the nifty bios feature to flash it to a 6970.

580 is $490x2 = $980

Think they were trying to get into the same ballpark with regards to price/performance. The 590 wouldn't really count considering it's limited supply (good luck finding one), the price and it's still second in performance to the 6990.

Comparing a 590 would have been idiotic seeing as how it's already slower, it's been done (compared to the 6990, that is) and you can't find it out in the wild. An endangered species more suited to a trophy case than your PC. The point of the article was for ~$1000 you're getting more out of an amd 6990+6970 crossfire (really trifire) than you would be with a 580x2 for the same price range. The fact that Nvidia is skimping on the ram on their cards hampers the users who use multiple monitor setups and extremely high resolutions has nothing to do with hardocp nor AMD. That's nvidia cutting costs and overcharging for their cards.



Thats what I have now as you apatly wrote is a tri-fire setup. It really smokes! Shogun is maxed out and butter smooth.
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April 15, 2011 10:04:52 PM

The AMD drivers have increased significantly as well, even matching and surpassing nvidia in dual/tri card setups.

It is a beastly setup. Just make sure you get a really really good power supply... =P
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a b U Graphics card
April 15, 2011 11:31:36 PM

yeah and prepare to wait and wait and wait and wait for driver fixes, enjoy :lol: 
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April 15, 2011 11:48:52 PM

jjb8675309 said:
yeah and prepare to wait and wait and wait and wait for driver fixes, enjoy :lol: 


Not quite sure where you're going or rather getting that from...

The 6950 and 6970s in particular perform very *very* well in crossfire with the recent drivers.

Wanna talk about poor driver support? try playing dragon age 2 with an nvidia card.
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a c 214 U Graphics card
April 15, 2011 11:57:27 PM

I was talking about 6990 crossfire performance with another 6990.
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a b U Graphics card
April 16, 2011 12:32:30 AM

^wouldnt bother playing that game at all, have fun
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April 16, 2011 12:16:35 PM

Quote:
ok that tests were done on eyefinity. Its obvious two gpus will run out of vram when they only sport 1.5gb what did they expect.

Lets compare the price of running that setup and to get 35fps out of it. Any resolution lower would be a overkill then

6990 + 6970 + cooling + 3 LCD monitors of 1080p =

2 580s + a 1080p 3d LCD monitor =


Sweet jesus, you love nvidia. I do too, buddy, but recently they've been slacking and AMD's been kicking them in the stomach.

First and foremost, hardocp is probably one of the oldest and the best hardware benchmarking sites on the planet. Tom's is great, has way better and more active forums, but hardocp is still one of the most trusted names in GPU/CPU/PSU benchmarks stretching back more than 10 years. Accusing any of them of some sort of bias is completely laughable. If you were to read the article without your nvidia 3D goggles on you'd see they were testing the best setup possible from either company for $1000. Forget eyefinity, nvidia's 3D or HD3D as these things have nothing to do with benchmark figures themselves. The way you stress a videocard that costs that much is pushing up the resolution and AMD kicked nvidia's butt there. And like I said, that's nvidia's highest offer in terms of ram. Nvidia is cutting costs and not offering more ram on their high end videocards whereas AMD isn't. Had nvidia made videocards with 2GB ram it certainly would've been closer, but they don't, and therefore they aren't as suitable for multiple monitor setups where you push high resolutions -- and get this -- that was the point of the test. If you're spending $1000 on GPUs you'd better be running multiple monitors with high res, otherwise you're a complete tool.
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April 16, 2011 12:37:50 PM

And you're arguing that you want a test where you spend $1000 on 2x580s on a single 1080p monitor with 120hertz... Sorry, I'm not gonna feed into your troll-like arguments. Spending a thousand bucks on videocards yet only playing them on a single 1080p monitor... yea... you go ahead and do that.
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