GTX 970 SLI for 4k with only 3.5GB RAM?

B3NDY

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Apr 18, 2014
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Now I was planning on getting 2 970s to go in SLI and put them in my custom loop. Although they may not be able to power every game maxed out at 4k but I know they have the horsepower to drive a lot of games at 4k at high to medium settings at least.

Now my problem is that before the 970 supposedly had 4GB RAM which would have been great for 4k at higher settings but now my dilemma is that most will use more than 3.5GB at higher settings and with the performance drops that come by going over this I don't know whether this is such a good idea.

I don't know whether it would be better to get something like a 290X with the full 4GB available and with only slightly less performance and since it will be watercooled it should still be cool and quiet. Problem with this is I really like the efficiency of maxwell and the shadow play that comes with it.

The ideal option would be simply to get 980s instead but this would cost an extra £400 over the 2 970s which is way over my budget.

What's the best option? Get the 970s and they will work fine? Get the 290Xs and put up with the extra heat and none of the features that come with NVidia? Or just wait and see what emerges, maybe the 3** AMD cards or more from Nvidia? I can wait till the end of Q2 before I want to get the upgrades.
 
Solution
The 290Xs are the better option. Or you could wait for the 300 series and see what is available then.

Even with 970s, you'd be fine in most games, but there obviously will be some that the vRAM issue will affect you in. BF4, FC3+4 and modded Skyrim are all games that use more than 3.5GB vRAM at 4K (not necessarily always above 3.5GB). For BF4, turning down a few settings brings the vRAM usage down a fair bit, so you'd be fine there.

Might be worth considering the 8GB version of the 290X. Modded Skyrim can use well over 4GB (around 5.2GB with my config), so that may be a sign of things to come in the future.

Oshino Shinobu

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Jan 31, 2015
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The 290Xs are the better option. Or you could wait for the 300 series and see what is available then.

Even with 970s, you'd be fine in most games, but there obviously will be some that the vRAM issue will affect you in. BF4, FC3+4 and modded Skyrim are all games that use more than 3.5GB vRAM at 4K (not necessarily always above 3.5GB). For BF4, turning down a few settings brings the vRAM usage down a fair bit, so you'd be fine there.

Might be worth considering the 8GB version of the 290X. Modded Skyrim can use well over 4GB (around 5.2GB with my config), so that may be a sign of things to come in the future.
 
Solution

UnpredictableJack

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Dec 14, 2014
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They will get nealry all the games on best settings at 4K.
Get them after DX 12 comes out, the VRAM will STACK so you will have 7GB of VRAM :)
Dont get AMD cards, they are extremely hot and take a lot of power. Go NVIDIA, you wont regret it :)

Good luck(i am doing the exact same, getting 970 sli when DX 12 comes out and it will come out soon!)
 
Still think it's overblown...this 3.5/4GB issue. I just picked up Dragon's Age Inquisition this week. I have 2 in SLI running 3440 X 1440 resolution. I cranked up the settings all to ultra, left vsync ON(my monitor is 60 hz), and set MSAA to 4X. Anyways, I used GPU-Z to record GPU Load %, VRAM, temps ect. for 1.5 hours or so. After playing, I checked out the logfile. I was suprised to see my VRAM usage on each GPU was averaging between 3.6 and 3.95GB, well over the 3.5 we've all heard about. Anyways, If I wouldn't have checked the log file, I wouldn't have known how much was being used as I didn't have any "severe performance drops/stuttering" that people mention. I understand it may vary depending on game, but wasn't noticable to me. Of course, for your question, I wouldn't switch to 290X(s) solely on the VRAM issue. What features are you looking for that Nvidia has that AMD lacks? BTW, I'm not biased toward either Nvidia or AMD, I've switched back and forth over the years. I am happy with my 970s though, regardless of all the articles that have surfaced lately. Also, they can run very cool in a custom loop :)
 


Reason why it's running so well is because the NVidia driver has optimized that game very well. Putting low priority data into the 512mb and high priority into the 3.5gb only has a few percent lower frame rates than if it had a full single partition of 4GB.