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7950 or Crossfire 6950? - Page 2

post #11 of 28
Quote:
Originally Posted by Arni90 View Post

Alternate Frame Rendering's inherent issues with Microstutter hasn't improved the slightest in the last 10 years. The problems with uneven frame time are still noticable.
Then consider yourself lucky, because it's a pain in the behind and detracts from playability to the point where I stop enjoying the game and start focusing on how badly the game plays.
Powertune not setting itself properly
Voltage tuning
Syncing clocks between cards
The only problem the AMD side has with drivers today are with CrossfireX, not enabling, not working, not detecting cards, you name it.
Tom's Hardware 7970 review
Going down the CFX road without first having the best performing graphics cards available is a stupid idea. CFX is a technology that exists to extend the reach of playable performance where a single GPU is unable to meet demands, treating it as a viable alternative to a single card is asking for trouble.
In my humble experience and opinion, that is.

Rediculous statements above aside, I have crossfire 6950's unlocked to 6970's with a 120hz screen and get an avg of 90fps, highs in the 130's, lows in the 70's @ 1920x1080 Ultra settings 2x AA 16x Aniso and do not have microsttuter, smooth as butter, almost too smooth. Crossfire scaling is lightyears ahead of "10 years" ago, it is in the 90% plus scaling.I would go for a single 7970 if anything, for future crossfire.
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post #12 of 28
I have crossfired 6950s right now unlocked to 6970 and they're very stable.Their 3DMark 11 score is around low 9000's which is quite good. I've only seen micro stuttering in 3DMark 11, not in Heaven or in actual gameplay. The card temps are only within about 5 degrees C from each other and I couldn't be happier with their performance.
post #13 of 28
Quote:
Originally Posted by stryker7314 View Post

Rediculous statements above aside, I have crossfire 6950's unlocked to 6970's with a 120hz screen and get an avg of 90fps, highs in the 130's, lows in the 70's @ 1920x1080 Ultra settings 2x AA 16x Aniso and do not have microsttuter, smooth as butter, almost too smooth. Crossfire scaling is lightyears ahead of "10 years" ago, it is in the 90% plus scaling.I would go for a single 7970 if anything, for future crossfire.
Have you even tried the two configurations in games?
I have, and I can tell you the difference between a 7970 and 2x 6950s overclocked or not, is definitely noticeable and in the 7970s favor. I also doubt you can play BF3 at those settings with those cards, I had the same cards and I played at High without any AA and I still got major microstuttering and frame drops to the 50s when there was a lot going on (2600k @ 4.7GHz)

And I said AFR's inherent issues with microstutter haven't improved in the last 10 years. I didn't say anything about scaling and numbers, I said the issues you experience with AFR are just as noticeable today as they were 10 years ago. Saying you don't experience microstutter, and therefore it doesn't exist is blatantly wrong. Fact: 1x 7970 is smoother than 2x 6950s and let's me play at higher settings without me noticing bad framerates, the difference when overclocked is night and day.
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post #14 of 28
At the end of the day, getting the 7950 is more future proof and stable, since it is a single gpu which is better supported by a lot of games. But in terms of current performance I would definitely go with the xfire. the 7950 3DMark II is roughly 7000 which means you'll be getting about a 30% performance increase from that benchmark. The Heaven benchmark gives the 7950 just under 30 fps where when I tested my config I got 48 fps, which is significantly higher. These 2 benchmarks, mind you, do scale well with crossfire and you should look at benchmarks out right now for the 7950, I know motherboards.org has them in but that's all I've checked.

In some games, however, the 7950 will just flat out outperform the 6950's because of lack of crossfire support, but that's something for you to consider with your choice of games.
post #15 of 28
Quote:
Originally Posted by Arni90 View Post

Have you even tried the two configurations in games?
I have, and I can tell you the difference between a 7970 and 2x 6950s overclocked or not, is definitely noticeable and in the 7970s favor. I also doubt you can play BF3 at those settings with those cards, I had the same cards and I played at High without any AA and I still got major microstuttering and frame drops to the 50s when there was a lot going on (2600k @ 4.7GHz)
And I said AFR's inherent issues with microstutter haven't improved in the last 10 years. I didn't say anything about scaling and numbers, I said the issues you experience with AFR are just as noticeable today as they were 10 years ago. Saying you don't experience microstutter, and therefore it doesn't exist is blatantly wrong. Fact: 1x 7970 is smoother than 2x 6950s and let's me play at higher settings without me noticing bad framerates, the difference when overclocked is night and day.

More rediculous statements, spare me, you appear to be the only one that didnt figure out how to use x-fire properly, looks like operator error.
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post #16 of 28
I've had my 6950 crossfire setup for about three weeks now and I love it. I've had no issues with my crossfire configuration (nor driver issues) and haven't noticed any micro-stuttering. Popped them in my motherboard, downloaded the newest 12.1a drivers, 11.12 cap 2, and I've been rolling in pure gaming awesomeness.

Personally, if you have the power supply, air flow, and big enough case, I'd go with crossfire 6950's. Two 6950's are simply faster, and many can be unlocked to 6970's for later down the line for even more performance.

edit:
The whole "lack of driver support in a year for 6950's" is really a ridiculous claim. AMD still supports 4850/4870 crossfire in their current drivers and those cards came out in 2008!
Edited by konoii - 1/31/12 at 11:39am
post #17 of 28
Quote:
Originally Posted by stryker7314 View Post

More rediculous statements, spare me, you appear to be the only one that didnt figure out how to use x-fire properly, looks like operator error.
How do I use CFX properly then?

How can you say I don't know how to use CFX?
YpUfWmz.png

I got pretty good results when benchmarking, and I'm not denying 6950 CFX benches better than a single 7970. I'm denying 6950 CFX will give a better experience running games than a 7950.

EDIT:
As for lack of support, You could always hack "support" in through RadeonPro or something similar, but the chances of getting game artifacts and/or bad/horrible "scaling" are in my experience higher than it working well.
Edited by Arni90 - 1/31/12 at 12:47pm
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post #18 of 28
i defenely will go with the 6950 in crossfire setup.
post #19 of 28
If anything, wait. 7970s and 7950s are stupid expensive now, and Kepler and 78xx are just around the corner. 79xx prices are going to come down soon, which also means 69xx prices will come down soon too.

If you really need the graphics muscle, AKA you run games at 2560x1600, 3D at 120hz, or whatever, go for 6950s or 6970s in CF once they come down in price. Otherwise, for a gaming experience with less headaches, less noise, a cooler room, and more resale value/future potential, go for a 7950 or 7970 once better non ref models come out and they drop in price.

As for longevity at 1080p, 6950s will lose most crossfire support by the time a 7950 starts to feel slow in games. I'd say it's a wash in that respect.
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post #20 of 28
I recently crossfired my 6950. I have one Sapphire Dirt 3, and one Diamond reference card. I was considering getting a 7970, but the fact that the Diamond was on sale made it a no-brainer. ($200 after rebate at Microcenter.) Both of my cards are unlocked. I have experienced some problems using Powertune, so I just don't try to mess with it anymore. Both are overclocked to 950/1375 @ 1.18v. After a fresh install of windows and the 12.1a CCC drivers, the setup runs butter smooth. I never drop below 70 fps in BF3 (Ultra AND 4xMSAA), even when sniping. I don't notice any micro stutter, but it may exist. It seems to run just as smooth as it did without MSAA on a single 6950. My temps max out at 71 degrees C on the Powercolor at 70% fan. The main drawback is the incredibly loud sound at that speed, plus the fact that I turn up my 3 intake case fans.

So, I think it's a close call. If I had to do it again, and I was in your shoes (not having owned a 6950 already), I would have just bought a 7970 to avoid the headaches of crossfire, to avoid the increased noise/power, and to potentially crossfire the 7970 in the future. thumb.gif
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