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Crossfire 5870 vs single 7850 in eyefinity (considering 7970)

post #1 of 15
6/28/12 at 8:25pm
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Hello Guys,

I currently own a Dell 2410 monitor and will soon add two 2412 monitors in eyefinity set up. I was wondering if I add another 5870 in crossfire that I will be able to handle the 3 monitors well or I should go with a 7850. I mostly do heavy photoshop/lightroom 3 editing as well as playing BF3, eve online, TF2 and such. Will I need to go with a stronger GPU to handle these games/tasks? I don't mind if the game is running around 45fps on average.
I read here somewhere that crossfiring the 5870 is not a good idea because of the limited 1GB ram. I own a 1GB ram version btw.
Edited by Negma - 6/28/12 at 8:44pm
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post #2 of 15
6/28/12 at 8:28pm
1GB VRAM will be a huge bottleneck in your case.
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post #3 of 15
6/28/12 at 8:36pm
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For TF2, a single 5870 should be more than enough. For Eve and BF3, on the other hand... Well, 1gb of vram would pose a problem, but 5870 crossfire is much faster than a 7850. I would get a 7850 now and add another one later; 7xxx has much better crossfire than 5xxx did, as well as twice the vram.
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post #4 of 15
6/28/12 at 8:43pm
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I have done some research and there is no way either of these cards will handle a game like BF3 in eyefinity anywhere close to acceptable fps. so I may consider a 7970. Although I am not sure if the MSI forzr is worth the extra 50-60$ as compared to the other versions.
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post #5 of 15
6/28/12 at 8:45pm
Quote:
Originally Posted by Negma View Post

I have done some research and there is no way either of these cards will handle a game like BF3 in eyefinity anywhere close to acceptable fps. so I may consider a 7970. Although I am not sure if the MSI forzr is worth the extra 50-60$ as compared to the other versions.

If you OC a lot, the the Frozr will be a treat.
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post #6 of 15
6/28/12 at 9:02pm
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Quote:
Originally Posted by Negma View Post

I have done some research and there is no way either of these cards will handle a game like BF3 in eyefinity anywhere close to acceptable fps. so I may consider a 7970. Although I am not sure if the MSI forzr is worth the extra 50-60$ as compared to the other versions.

It should work if you lower the settings a bit, especially if you OC. In Ultra, obviously not; even the 7970 and 680 can't do that.
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post #7 of 15
6/28/12 at 9:02pm
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I've tried my hand at overclocking my 5870, and I have to say. I didn't notice much of an improvement. all that I noticed were higher temps and loud noises (maybe 3 or 4 more fps in some games). I do not know how well the 7XXX series overclocks though.
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post #8 of 15
6/28/12 at 9:10pm
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well according to this site, http://www.techpowerup.com/reviews/MSI/HD_7970_Lightning/9.html , you can run in 5760x1080 with around 32fps. obviously I will be running at 5760x1200 but if I lower or even remove the AA, I will be able to manage a decent frame rate. and maybe if I OC the card further it will do better. Although it seems that the MSI 7970 twin forzr is already OC (is this as much of an OC as you can get with air cooling?)
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post #9 of 15
6/28/12 at 9:18pm
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Quote:
Originally Posted by Negma View Post

Although it seems that the MSI 7970 twin forzr is already OC (is this as much of an OC as you can get with air cooling?)

No, that's not max OC; people usually get 1150mhz+ with reference coolers, and Twin Frozr is much better. Plus, if it's the Lightning that you're referring to (I assume so, as I couldn't find a standard 7970 with a twin frozr), it also has upgraded VRMs and the like to further help OCing.

Also, the 7970 can get well over a 20% performance gain with OC; I've seen >30% quite a bit.
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post #10 of 15
6/28/12 at 9:23pm
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Well, lets talk! I went from! 2 460 GTX's wich are a little lesser then the 5870 i would assume i wasn't into the whole amd ati thing back then, EAch 460 had 2GB vram and i ran 5760x1080, They struggled, ALOT i hit Vram limits on most MMORPG's and TF2 wasn't a big fan of Nvidia surround, I went to a single 7970, And it mopped the floor with them, Given two 460s with 2GB vram are AT or equal to a 580, the single 7970 literaly mopped the floor with both of them, 1GB of Vram will be a huge limitation at that resolution, Hell i don't even reccemend 1GB vram for 1080p, let alone Surround/eyefinity, My average game uses at full details (I've got a second 7970 now) Roughly 2200-2500 Vram, The worst offender being Rift and BF3, Tf2 still has issues, But meh TF2 is awesome so i deal with it. PS my 7970s go to 1310 both referance, From my experience with eyefinity/Surround, Memory OC effects performance more then Core clock does as it's a very Vram intensive resolution.
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