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Best cpu to handle dual 5970/ triple hd 7970/ Gtx 570/580?

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August 13, 2012 5:14:49 PM

Hey, I'm looking for a CPU for my new build that can handle one of the gpu setups in the title.

Thanks appreciate it if you can help.
a c 156 à CPUs
August 13, 2012 5:38:08 PM

That really depends on your budget.

The Intel socket 2011 i7s would do very well with these GPU configs, especially with the quad channel memory capabilities, for example.

So, how much are you planning to spend?
August 13, 2012 5:42:27 PM

In my opinion quad or triple sli/crossfire GPU setups are more trouble than they're worth, and good luck getting a good number of games to use your 3 GPUs.

But, if you really want to know the answer, any decent i7 Intel Ivy Bridge / Sandy Bridge processors will do what you want with a good overclock over 4Ghz.
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August 13, 2012 5:59:37 PM

TBH, Im really only considering a dual gpu setup at the momment with two hd 5970s.

a c 156 à CPUs
August 13, 2012 6:02:18 PM

electricfirebolt said:
TBH, Im really only considering a dual gpu setup at the momment with two hd 5970s.

Budget?
a c 156 à CPUs
August 13, 2012 6:11:46 PM

Total budget? To get the CPU of your desires, you will need to get a new motherboard and memory. Unless you plan to recycle some of your existing system components, you'll need to buy those too.
August 13, 2012 6:18:29 PM

You will also need a good noiseproof headset if you want to run triple CF...looking at the bright side you will probably save on heating during the winter. :) 
August 13, 2012 6:46:16 PM

I just need a CPU that can handle it within my budget of £180 - £260, and its dual card setup in going for.
a c 186 à CPUs
August 13, 2012 6:56:06 PM

Well we need a COMPLETE budget? Because you'll need to find a board that can fit 2x 5970's.
a b à CPUs
August 13, 2012 7:09:26 PM

Hi :) 

I have Dual 5870s (the rare 2 gb versions) running with an AMD 1100T BE (6 core), which will be in your price range IF you can find one...

All the best Brett :) 
August 13, 2012 7:17:51 PM

Just wondering, how much are you paying for the HD 5970s?

http://www.anandtech.com/bench/Product/587?vs=598

GTX 670 is far faster in newer games, consumes way less wattage and produces less noise.

Plus, an HD 5970 is a dual-gpu card, with 1GB VRAM per GPU. You're going to see extreme bottlenecking with that much memory if you want to future proof. Even BF3 and Crysis 2 are memory consuming monsters. So, you're gonna have 4 GPUs slaving away (not good for compatibility) with only 1GB VRAM per core (if I'm not mistaken). Even If you're not a fan of Nvidia, two 7950s, I'd be much more comfortable with.

Just some advice. Plus you're bound to get a massive amount of heat with them older cards.
August 13, 2012 7:46:58 PM

Whats your thoughts on the 4GB 5970's?
August 13, 2012 7:59:54 PM

That's certainly better, having double the VRAM. Still the issue lies with you having 4 GPUs. The fact is, most games won't cooperate nicely with them.

And there's the problem of heat. And noise.

Don't get me wrong, I'm not an Nvidia fanboi, the fact is you're buying old tech, and the fact that you're going to be using 4 GPU cores is what worries me most.
a b à CPUs
August 13, 2012 8:18:21 PM

I don't see why not get an i5 2500k or 3570k and over clock it. Since even if it does cause a bottleneck it. It doesnt matter what fps you get in a game as long as its over 60 which i5 more then capable. But if you can go for an i7 specially the 6 cores ones are pretty sweet but they are expensive!
August 13, 2012 8:23:15 PM

What's your GPU budget then?
August 13, 2012 8:23:36 PM

bobbybamf12 said:
I don't see why not get an i5 2500k or 3570k and over clock it. Since even if it does cause a bottleneck it. It doesnt matter what fps you get in a game as long as its over 60 which i5 more then capable. But if you can go for an i7 specially the 6 cores ones are pretty sweet but they are expensive!


Yeah, but running out of VRAM is a serious issue. FPS tanks.
a b à CPUs
August 13, 2012 8:25:15 PM

BTW i'm not sure on this but i heard hd 5xxx series had problems with crossfire it may have been fixed but i read that the microstutter was terrible on most games.
a b à CPUs
August 13, 2012 8:35:36 PM

MTindle said:
Yeah, but running out of VRAM is a serious issue. FPS tanks.

yeah thats deffinitely true i wouldn't go lower then 2gb if i'm spending that kind of money on a video card
a c 186 à CPUs
August 13, 2012 11:10:01 PM

The 5970 is a 2gb card. 2gb per gpu!
August 13, 2012 11:28:02 PM

If it's a 2GB card, with two GPUs, then it means that each graphics core has 1GB each.

For example, the GTX 690 is a 4GB card. It has 2 GPUs and the VRAM is split between the two, so 2GB per GPU.

Unless I'm severely mistaken, then please explain to me why I'm wrong. O_o
a c 186 à CPUs
August 14, 2012 12:37:07 AM

I'll explain to you when I get to my computer...

Ok, when you sli 2 cards with 1gb of VRAM you only end up with 1gb, not 2gb. In sli and crossfire, VRAM is not added.
a b à CPUs
August 14, 2012 1:24:31 AM

Yup whatever memory your main card has is all it has. you can't have two 2gb cards and have 4gb vram. you still have 2gb just how it works.

This is how crossfire/sli works. I'm going to Label them GPU-A and GPU-B just to clarify. When you play a game GPU-A will work on one frame and GPU-B will work on the next so by the time GPU-A has finished with its frame GPU-B has already finish with its frame, But the load on the GPU's vram will be just as demanding as if there was just a single gpu. Since the GPU's work alone on THe game so the load on the vram will be the same. If both gpu's work on the same frame then yes that would make sense but it don't thats not how it works.
a b à CPUs
August 14, 2012 1:53:06 AM

MTindle said:
If it's a 2GB card, with two GPUs, then it means that each graphics core has 1GB each.

For example, the GTX 690 is a 4GB card. It has 2 GPUs and the VRAM is split between the two, so 2GB per GPU.

Unless I'm severely mistaken, then please explain to me why I'm wrong. O_o



Your severely mistaken i already explained it but you can't use that as an example. Its 2 gpu cores not 2 seperate gpu's. Both gpu's cores share the same memery which is 4gb.
a c 186 à CPUs
August 14, 2012 3:26:58 AM

^^

Except on cards ilke the 5970 and GTX 690 for example, they only have 2gb of VRAM between 2 GPU's but are advertised as 4gb.


2 GTX 670's with 4gb of vram would outperform the 690 at higher resolutions.
a b à CPUs
August 14, 2012 3:52:09 AM

amuffin said:
^^

Except on cards ilke the 5970 and GTX 690 for example, they only have 2gb of VRAM between 2 GPU's but are advertised as 4gb.


2 GTX 670's with 4gb of vram would outperform the 690 at higher resolutions.


Yeah thats true but the benefit of the 690's is it does have better power consumption but most people don't really care to much for that.
:hello: 
August 14, 2012 5:52:33 PM

So what about 2x HD 5870 2GB Versions in crossfire?
a c 186 à CPUs
August 14, 2012 5:57:11 PM

That would be equal to 1 5970, slightly faster.


There's no point though, these cards are starting to show their age.
August 14, 2012 6:18:52 PM

Hi, Would a Phenom X6 1100T handle two gtx 580s?
a c 186 à CPUs
August 14, 2012 6:21:18 PM

Yes, it should be able to.
a c 156 à CPUs
August 14, 2012 6:23:54 PM

electricfirebolt said:
Hi, Would a Phenom X6 1100T handle two gtx 580s?

On what make/model of motherboard?
August 14, 2012 6:23:55 PM

Ok, I shall begin the hunt for one...
a b à CPUs
August 14, 2012 8:24:19 PM

electricfirebolt said:
Hi, Would a Phenom X6 1100T handle two gtx 580s?

It should be fine for all games on max settings right now and probably good for maybe 2 more years to come...maybe... It will benefit more when the new xbox and playstation comes out since those system will probably be rocking a quad core cpu. Right now most games are ported from the xbox which only have 2 cores so in most cases you might only have 2 cores for gaming but when the new systems comes out you will start using 4 cores more often for newer games which will be sweet! A intel fanboi might say it will bottlneck an sli configuration but really it won't there is no difference between 60fps and 100fps. Also the 1100t the cpu to get if your going AMD so thats a very good choice. but.... if you can try to get an i5 since people say AMD is a better budget cpu but intel will have the longer life span so it evens out.
a b à CPUs
August 14, 2012 8:47:40 PM

Ok if you want to run Quad-Fire you'll notice that all recent games work now. The only time games have issues is shortly after release.

I have owned a few Dual/Tri and Quad CrossfireX rig.

CPU wise I'd go for something like a 2500K/3570K and I'd overclock it above 4GHz. I would not go AMD for the CPU if you're going for Tri or Quad CrossfireX setups (not enough CPU performance to make it worthwhile because AMD VLIW5/VLIW4 based GPUs make more use of the CPU than nVIDIA cards of the same generation due to VLIW4/5 being more reliant on the driver compiler).

That's from my experience at least.
August 14, 2012 10:13:52 PM

I'm going to get a phenom 1100t and combine it with am3+ board and sli two gtx 580's and perhaps overclock the CPU. I original looked at this CPU then changed mind to new FX CPUs but there really only quad cores, so phenom is a better choice as its not just made up of majority of virtual cores.
a c 186 à CPUs
August 15, 2012 1:42:40 AM

I'd grab two 660ti's :) 
a b à CPUs
August 16, 2012 11:44:48 PM

Btw if you guys don't know yet the new 660ti released today!
!