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HD 6970 Crossfire VS HD 7970 - Page 3

post #21 of 71
The Crossfire setup will be faster, but will be hampered by Microstuttering.
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post #22 of 71
Quote:
Originally Posted by charlesC8188 View Post

Title says it. I just bought a new 2500k and a new 1155 motherboard. I already have two 6970's in a crossfire setup, but I was on a quad core Phenom II, and I believe the chip was bottlenecking my GPU's drasticly. So with my new setup with two 6970's be better than a single 7970? Performance wise. I game on an eyefinity setup.

I say if you are going to run dual 7970s stick to the 6970s until drivers mature. If you are getting only 1 7970 stay with the 6970s unless you just want to future proof DX11.1 , but by the time DX11.1 games are out there will be faster cards. tongue.gif This is all just my opinion
post #23 of 71
It is a close call, I've seen a lot of benches that show the 6970x2 only beating a 580 GTX by a small margin and the 7970 is faster than a 580. The benches I've seen puts the 7970 on par with 6970x2 but people can always find a bench to make them right which is why I mentioned the 6970x 2 vs. 580 (instead of 7970). So I'm still going 6970x2 is maybe slightly faster than a 7970, But since I own 7970x2 I'm good either way.
 
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post #24 of 71
Quote:
Originally Posted by Bravo2010 View Post

It is a close call, I've seen a lot of benches that show the 6970x2 only beating a 580 GTX by a small margin and the 7970 is faster than a 580. The benches I've seen puts the 7970 on par with 6970x2 but people can always find a bench to make them right which is why I mentioned the 6970x 2 vs. 580 (instead of 7970). So I'm still going 6970x2 is maybe slightly faster than a 7970, But since I own 7970x2 I'm good either way.

Those can not be overclocked 6970's and that must be a heavy overclocked 580. Yes my 3 cards are quite heavily overclocked but it's not often i see my cards being beaten by 2x 7970's and quite often i see my 3 cards beating 3 580's.

As tsm says the OCP on the 6970's are almost non excising so as long as you can keep them cool you have a lot of headroom on the voltage.
post #25 of 71
Quote:
Originally Posted by importflip View Post

The Crossfire setup will be faster, but will be hampered by Microstuttering.

So what you are saying is that stay away for CF and SLI. Its was a mistake to being with.. You are so wrong. With todays unoptimized games CF and SLI is a must. micro-stuttering does not happen with my GPU and i would have to say its just some stupid thing people say when they have single cards. Frame time exists with single GPUs too. Frame time is also effect from lower fps. If you are ~ 40s with CF or SLI then its time to upgrade.
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post #26 of 71
6970cf is faster. i wouldn't bother upgrading if i were you
post #27 of 71
There are a lot of trade offs to consider with this. On a normal everyday gaming experience, the Xfire will run faster. However, some games such as Skyrim do not support multi-GPU well at all, which is where you will see a 7970 pull ahead.

Another thing to consider is future proofing your system. If you get dual 6970s, you will see very high performance now, plus with newer games like BF3 supporting crossfire more and more. However, the 6k series is officially old tech now, and with the 7k series you will even have the headroom to crossfire in the future.

Also, in terms of power consumption and heat, the 7970 will just outright kick the snot out of the Xfire setup for two reasons: it's a single card, and the 22nm technology on the chip helps lower heat, noise, and power consumption plus a lower idle power consumption than even a single 6970.

My bottom line:
Since you have multiple monitors, I would keep your 6970's until you can afford to get 2 7970's if you want that kind of power in the future. You will probably save some cash in the process while having better performance since it's an eyefinity setup.

Worst case scenario for a normal game with Xfire is that it'll perform as well as a single card. With that in mind, the 7970 will be a more reliable setup by having a more stable performance rate for a larger variety of games, but I don't think that it'll give you the power you may want with 3 monitors.
post #28 of 71
Quote:
Originally Posted by ZealotKi11er View Post

So what you are saying is that stay away for CF and SLI. Its was a mistake to being with.. You are so wrong. With todays unoptimized games CF and SLI is a must. micro-stuttering does not happen with my GPU and i would have to say its just some stupid thing people say when they have single cards. Frame time exists with single GPUs too. Frame time is also effect from lower fps. If you are ~ 40s with CF or SLI then its time to upgrade.

Whoa, did I read that right?......................are you saying that micro stutter does not exist and anyone who thinks so is essentially an idiot? It does, without a doubt exist, however I noticed it a lot more with my 6870 x-fire setup and very little with my unlocked 6950's, so I can surely understand your comment about never noticing it happen with a clocked 6990. CF or SLI is only really a must with triple monitors...I assume that is what you mean. My single card solution tears up my single monitor resolution, but back when I ran eyefinity with 3x HP ZR24W's, even my 6950's in x-fire were a bit underpowered for that many pixels to push.
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post #29 of 71
Quote:
Originally Posted by jhatfie View Post

Whoa, did I read that right?......................are you saying that micro stutter does not exist and anyone who thinks so is essentially an idiot? It does, without a doubt exist, however I noticed it a lot more with my 6870 x-fire setup and very little with my unlocked 6950's, so I can surely understand your comment about never noticing it happen with a clocked 6990. CF or SLI is only really a must with triple monitors...I assume that is what you mean. My single card solution tears up my single monitor resolution, but back when I ran eyefinity with 3x HP ZR24W's, even my 6950's in x-fire were a bit underpowered for that many pixels to push.

Like i said it cause either from bad drivers which can be present even with single GPU and more noticeable with multiple GPUs where frame time can differ from GPU and creates stutter. Also in General frame time increases which does not create stuttering but makes 60fps feel like 40 fps. GTX580 and HD 6970s are very very good towards frame times. GTX580s actually have next to no stutter. The lower end the GPUs the more stutter you have. First its because low fps increase frame time and that AMD/Nvidia do this on purpose so their high end offering feels smother.
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post #30 of 71
Thread Starter 
Wow. Thank you all for the great replys. I'm a noob to overclocking GPU's, does OCP mean overclock potential? Why can the 69** series be overclocked so much more than the 79** series cards? Also + rep for all the good replys! Thanks! I think I'm just gonna stick with the 6970's since I just upgraded my cpu and board, I want to see how they perform on an Intel setup.
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