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4870 CF v ????

post #1 of 12
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My current setup has been running great, but playing Mechwarrior: Living Legends, I do allot of Frap's footage and though without Fraps running my system does amazing on the FPS, as soon as FRAPS starts it kicks it below 30. My current two GPU's are 1gb a piece, and I know they actually perform better than a single 4870x2, because I have one and tested it.

So with this I started looking around at the newer versions of GPU's available. My mATX asus extreme allows two PCI-E at 16x for CF or SLI.

I'm assuming that a single 6970 2gb is not as powerful as two 4870's?? Correct me if I am wrong, and if I am, proof? Lowest cost on one of those bad boys is 340$ range. Now I'm all about getting two lower end GPU's to get better performance, ie why I'm using CF currently.

Now on the assumption that a single 6970 2gb isn't as powerful as two 4870 1gb's in CF, what would be more powerful using the newer gpu's in CF?

So now I'm looking at the next step down, the 6950 2gb, at the cost of 270$ per card. So in theory, 540$ for a CF setup. More expensive than a single 6970 2gb, but how much faster/better is it compared to my current 4870's in CF? Ok so what is next?

Now down to the 6850 1gb, 166$ per card, so around 330$ for a CF setup. One thing I do notice is that its now back down to 2gb of video memory in CF, and I do not know if these are even more powerful than my current 4870's. So is this even something I should consider?!

Now onto the flip side of the house, I know almost nothing of Nvidia cards, so if you are knowledgeable and have options in that department please feel free to post those as well. I'm all about spending less and getting more with two lower end cards if at all possible. Look forward to hearing your responses!
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post #2 of 12
Your 4870's in crossfire are on par with a 5870. The 6970 is much more powerful than your two cards. A single 6970 would be a great upgrade.

Edit: Remember that you can't add each card's video memory to get the total video memory of the system. If each card is 1gb then you get a total of 1gb of frame buffer even though you have two cards. That being said I would go with a 2gb card because after reading a bunch of reviews on this site some games are using more than 1gb of memory.

As for an nvidia side. Your equivalent to a 6970 would be about a GTX 570.

The scaling on 6870 CF however is amazing; to keep in mind. I would personally go with the 6970.
Edited by AMC - 5/31/11 at 3:04pm
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post #3 of 12
4870 CF is a little slow than a 5870 and the average on my setup I had was about 10-15 FPS. I had 4870 1g CF before.
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post #4 of 12
A 6970 is in fact by far more powerful than two 4870s. I suggest getting a 6950 and unlocking it to be as powerful as a 6970. If you continue to use your current mobo, you can just add on with another unlocked 6950 later and you'll have power equivalent to a 6990
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post #5 of 12
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Quote:
Originally Posted by MeleeRay0 View Post
A 6970 is in fact by far more powerful than two 4870s. I suggest getting a 6950 and unlocking it to be as powerful as a 6970. If you continue to use your current mobo, you can just add on with another unlocked 6950 later and you'll have power equivalent to a 6990
Is this a fact? Proof please, its not that I do not believe you but I would like proof that is all.
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post #6 of 12
Quote:
Originally Posted by PhelanJKell View Post
Is this a fact? Proof please, its not that I do not believe you but I would like proof that is all.
Yes it is fact Phelan. I found a benchmark back in 2009 that shows two 4870's CF is almost as powerful as one 5870 but not quite.



Then I found another benchmark test in December 2010 that shows one 6970 being faster than a 5870.



Both benches at resolution 2560x1600 since your sporting a larger monitor. I used the Crysis benchmark because it's been my favorite game since first release so I took comparison. Also pretty GPU intensive. Thanks to anandtech.com for the benchmarks.

OFF topic : Crysis 2 is now my favorite. Almost completed on hardest settings and can't wait for Battlefield 3 in the fall.

If I can make a suggestion, I'd go for two AMD 6870's over two AMD 5870's. I'd go for one AMD 6950 2Gb over one AMD 6970 2Gb for less price. If your not worried about price then I'd choose the AMD 6970 2Gb, I personally go with the higher end card regardless of price. With your two monitor set up - 2Gb will be your better bet and will leave the CF door open for later. Your CPU can handle both options and upgrade later to CF.

Side note: Over clock the hell out of the 6950's as opposed to unlocking, taking the safer route and keeping the warranty any day.
     
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post #7 of 12
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Quote:
Originally Posted by Arizonian View Post
Yes it is fact Phelan. I found a benchmark back in 2009 that shows two 4870's CF is almost as powerful as one 5870 but not quite.



Then I found another benchmark test in December 2010 that shows one 6970 being faster than a 5870.



Both benches at resolution 2560x1600 since your sporting a larger monitor. I used the Crysis benchmark because it's been my favorite game since first release so I took comparison. Also pretty GPU intensive. Thanks to anandtech.com for the benchmarks.

OFF topic : Crysis 2 is now my favorite. Almost completed on hardest settings and can't wait for Battlefield 3 in the fall.

If I can make a suggestion, I'd go for two AMD 6870's over two AMD 5870's. I'd go for one AMD 6950 2Gb over one AMD 6970 2Gb for less price. If your not worried about price then I'd choose the AMD 6970 2Gb, I personally go with the higher end card regardless of price. With your two monitor set up - 2Gb will be your better bet and will leave the CF door open for later. Your CPU can handle both options and upgrade later to CF.

Side note: Over clock the hell out of the 6950's as opposed to unlocking, taking the safer route and keeping the warranty any day.
That first pic you posted isn't 2x 4870's in CF, that shows a 4870x2. Remember that above the 4870 was the 4870x2, which is the dual gpu.

But what the graph does show is that a single 4870 is around 8fps slower than a 5870.

The 5870 in CF from 2009 shows FPS of 34.8, compared to in 2010 of 47.2, which is driver optimization.

And in the second graph it shows a 6870 being faster than the 5870 by 7fps, so in my head this shows that 2x 4870's would almost as fast as a 6870, probably a little below.

If only the 6850/6870's came in 2gb versions I would pull the trigger!! haha So it looks like 6950's are the lowest end 2gb versions I can find, and in CF are straight beasts. Any ideas? Suggestions?

Arizonian +rep, great info btw!
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post #8 of 12
I found this site, it has some numbers for both cards.

http://www.gpubench.com/

Though looking at that if your crossfired 4870's are faster then a 4870X2 that will put them real close to a 6970.

And Toms ranks a 4870X2 right up there with a 6970 on its gaming hierarchy chart.

http://www.tomshardware.com/reviews/...70,2935-7.html
Edited by Chuckclc - 6/1/11 at 1:30pm
post #9 of 12
Quote:
Originally Posted by PhelanJKell View Post
My current setup has been running great, but playing Mechwarrior: Living Legends, I do allot of Frap's footage and though without Fraps running my system does amazing on the FPS, as soon as FRAPS starts it kicks it below 30. My current two GPU's are 1gb a piece, and I know they actually perform better than a single 4870x2, because I have one and tested it.

So with this I started looking around at the newer versions of GPU's available. My mATX asus extreme allows two PCI-E at 16x for CF or SLI.

I'm assuming that a single 6970 2gb is not as powerful as two 4870's?? Correct me if I am wrong, and if I am, proof? Lowest cost on one of those bad boys is 340$ range. Now I'm all about getting two lower end GPU's to get better performance, ie why I'm using CF currently.

Now on the assumption that a single 6970 2gb isn't as powerful as two 4870 1gb's in CF, what would be more powerful using the newer gpu's in CF?

So now I'm looking at the next step down, the 6950 2gb, at the cost of 270$ per card. So in theory, 540$ for a CF setup. More expensive than a single 6970 2gb, but how much faster/better is it compared to my current 4870's in CF? Ok so what is next?

Now down to the 6850 1gb, 166$ per card, so around 330$ for a CF setup. One thing I do notice is that its now back down to 2gb of video memory in CF, and I do not know if these are even more powerful than my current 4870's. So is this even something I should consider?!

Now onto the flip side of the house, I know almost nothing of Nvidia cards, so if you are knowledgeable and have options in that department please feel free to post those as well. I'm all about spending less and getting more with two lower end cards if at all possible. Look forward to hearing your responses!
Your two cards are better than an HD5850 but less than HD5870.
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post #10 of 12
I also found this Vantage result that may help you in you decision. It contrast the stuff I posted in the above post though. I also owned a 4870 1gb. I found a Vantage run of my 5870 OC'ed with the same chip and my old board and a 4870 OC'ed on same chip and board. Notice graphics score is over twice as high misread, almost twice as high as the 4870 score on the 5870 results. So even assuming the 4870's scaled 100% in crossfire, which i know they dont, they still would barely equal a 5870. So I'm gonna guess 6970>4870 crossfired rather easily.

http://3dmark.com/compare/3dmv/2892822/3dmv/3076458



Hope this helps some.

Hey just a thought. Why not tri fire some 4870's on that bad boy?
Edited by Chuckclc - 6/1/11 at 2:00pm
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