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HD 6970 Crossfire VS HD 7970 - Page 5

post #41 of 71
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Quote:
Originally Posted by TheBlademaster01 View Post

OCP = Over Current Protection, although your interpretation is pretty creative lol tongue.gif
Also, 7900 series or rather the 28nm products OC better than the older 40nm GPUs. So a 7970 will have the edge when overclocking comes into play. Your 6970s will pound a 7970 pretty hard though. My GTX 470s do so too, even at stock.

So the 79** series has more OCP than the 69** Series? Therefor can push the 69** series farther?
post #42 of 71
With a good overclock on the 7970 of say 1.2Ghz+ you'll start the struggle to notice the difference between it and a pair of 6970's...

But with a 7970 you'll get less power draw, heat and noise and generally more performance as the drivers mature.
post #43 of 71
Quote:
Originally Posted by charlesC8188 View Post

So the 79** series has more OCP than the 69** Series? Therefor can push the 69** series farther?

OCP apparently kicks in faster with 79xx series so it will crash easier while OC'ing when compared to 69xx. I don't really know, I don't own either of those cards wink.gif
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post #44 of 71
Quote:
Originally Posted by Mr Frosty View Post

With a good overclock on the 7970 of say 1.2Ghz+ you'll start the struggle to notice the difference between it and a pair of 6970's...
But with a 7970 you'll get less power draw, heat and noise and generally more performance as the drivers mature.
Quote:
Originally Posted by TheBlademaster01 View Post

OCP apparently kicks in faster with 79xx series so it will crash easier while OC'ing when compared to 69xx. I don't really know, I don't own either of those cards wink.gif
I can't speak for a 6970x2 but I can speak for a 6950 2gb x2 (shaders unlocked, oc to 6970 speeds)
I've owned the 6950 2 gb x2 (shaders unlocked) and 7970x2 now, I can say that my 6950 for sure had its OCP kick in way faster then my 7970. With that said I guess the only way to know for sure would be to have a member that owns a 6970x2 and a 7970 and compare. Anything else is rumor and assumption. What system the cards are running could also play into account. For instance an AMD 1100t running 6970x2 wouldn't be a fast as a 2600k running a 7970. I can say this for sure because my last system was an 1100t with a 6950 2gb (shaders unlocked) I had the card x2 for about a week. The 7970 went on sale and I sold the 6950's and bought that card. I upgraded cpus to the 2600k and the 7970 was 15% faster then the 1100t so im assuming the 6950x2 would be the same.
Edited by Bravo2010 - 3/8/12 at 3:49pm
 
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post #45 of 71
I have two 6950 in cf using the latest powercolor 6970 bios and couldnt be happier. I get around 75 to 130 fps in bf3. Considering games will not really graphically improve for the next 2-3 years, its safe to say this is all i need. Im currently playing assassins creed revelations at 200-350 fps... this is overkill. P.s. i have never experienced micro stuttering. What im trying to say is that the hardware vendors place their new releases based on sales margins not technological advances. But that gives them justification to sale at such high costs because its new and has a slight performance increase. My friend has a 6970 a 580 and now a 7970 and to be honest there is only about a 30%performance gap between all 3. The 6970 in cf scales equivalent or greater fps than the 580sli. The price differences are ridiculous compared to performance. You dont always pay for what you get is all im saying.
Edited by thorian88 - 3/13/12 at 8:52am
    
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post #46 of 71
Quote:
Originally Posted by thorian88 View Post

I have two 6950 in cf using the latest powercolor 6970 bios and couldnt be happier. I get around 75 to 130 fps in bf3. Considering games will not really graphically improve for the next 2-3 years, its safe to say this is all i need. Im currently playing assassins creed revelations at 200-350 fps... this is overkill. P.s. i have never experienced micro stuttering. What im trying to say is that the hardware vendors place their new releases based on sales margins not technological advances. But that gives them justification to sale at such high costs because its new and has a slight performance increase. My friend has a 6970 a 580 and now a 7970 and to be honest there is only about a 30%performance gap between all 3. The 6970 in cf scales equivalent or greater fps than the 580sli. The price differences are ridiculous compared to performance. You dont always pay for what you get is all im saying.

The 6950 is an awesome card, especially what you get for the price, It's high end but mid range priced. I was very happy with mine. As for not getting what you payed for,, 2x 6950 on extreme sale = ($225x2= $450) a 7970 on sale $525 = $75 difference for $75 you get extra Vram 3Gb instead of 2 and you only have to deal with one card, not 2 and the issues that go with having 2 cards. lower power consumption ,, etc $75 extra is well worth it...thumb.gif
Edited by Bravo2010 - 3/14/12 at 10:41am
 
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post #47 of 71
With a bit of an overclock a 7970 can beat out a 6990 so it'll have no problems matching or even beating a air of overclocked 6970's....

You also get all the benefits of a single card...
post #48 of 71
Quote:
Originally Posted by Mr Frosty View Post

With a bit of an overclock a 7970 can beat out a 6990 so it'll have no problems matching or even beating a air of overclocked 6970's....
You also get all the benefits of a single card...

Don't think so mate.

6970 CF:
455

7970:
700

A quick overclock to 950/1450 on the 6970 gave Legitreviews a 7% increase, so if you use that as a estimate then 6970 CF @ 950/1450 would give ~ 10418p

So to wrap it up:

6970 CF @ Stock = GPU score 9737p
6970 CF @ 950/1450 = GPU 10418p (Estimate)
7970 @ Stock = GPU 7600p (21.9% behind stock 6970s / 27% behind overclocked 6970s)
7970 @ 1125/6300 = GPU 9046p (9.0% behind stock 6970s / 18% behind overclocked 6970s)
7970 @ 1165/6500 = GPU 9389p (3.8% behind stock 6970s / 11.3% behind overclocked 6970s )

That is in 3dMark 11 GPU score only.

Even at stock speed the 6970's beat the 7970 @ 1165/6500 with about 350Gpu points.
post #49 of 71
Quote:
Originally Posted by Eggy88 View Post

A quick overclock to 950/1450 on the 6970 gave Legitreviews a 7% increase, so if you use that as a estimate then 6970 CF @ 950/1450 would give ~ 10418p
So to wrap it up:
6970 CF @ Stock = GPU score 9737p
6970 CF @ 950/1450 = GPU 10418p (Estimate)
7970 @ Stock = GPU 7600p (21.9% behind stock 6970s / 27% behind overclocked 6970s)
7970 @ 1125/6300 = GPU 9046p (9.0% behind stock 6970s / 18% behind overclocked 6970s)
7970 @ 1165/6500 = GPU 9389p (3.8% behind stock 6970s / 11.3% behind overclocked 6970s )
That is in 3dMark 11 GPU score only.
Even at stock speed the 6970's beat the 7970 @ 1165/6500 with about 350Gpu points.

1165Mhz? That's a really low overclock...

They do 1250Mhz+

And nice one for cherry picking results...

Head over to the 7970 owners club and you'll see it beating out a 6990 wink.gif
post #50 of 71
Quote:
Originally Posted by Mr Frosty View Post

1165Mhz? That's a really low overclock...
They do 1250Mhz+
And nice one for cherry picking results...
Head over to the 7970 owners club and you'll see it beating out a 6990 wink.gif

I have no problem seeing that a 7970 is in 90% of the time a better buy then 6970 CF, but to have a fair comparison its important to state if you talking about on air or water, @ stock or not and so on.

The results i quoted was the only CF 6970 results that would be comparable to the 7970 results i found.

Also i was referring to the 6970's not the 6990, the 6990 is downclocked 6970 cards so i have no problem believing that a single 7970 Overclocked would beat a 6990, and a 1200Mhz+ 7970 would probably beat a couple of 6970's at stock, but overclock the 6970's again and they would most likely jump ahead

And looking at the 7970 thread i cant see many guys over 1200Mhz, most of them stay in the 925-1150 range and only a handful of the once that do run them at 1200+ run them on air. So compare a "max" overclocked 7970 on water vs a "max" overclocked 6970 CF on water and i would be pretty sure that the 6970's would take the lead. (Or 7970 on air vs 6970 CF on air for that case)

That beeing said, if i had the option between 2 6970's and a 7970 i would hands down chose the 7970.

And btw, please take the time to quote the benchmarks regarding the 6990, not because i don't believe it, but because that if someone would like to see it they would have to go through 630 pages because the benchmarks are not on the first page..
Edited by Eggy88 - 3/14/12 at 5:06pm
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