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670 sli vs 780 pros and cons

post #1 of 41
Thread Starter 
Hello guys

Planning to take a new video card(s) and got really confused now, one friend says this, other friends says that, websites provide different info, dont know who to believe anymore.

because of that need your help

I wanted to take 2x670's:

http://uk.msi.com/product/vga/N670-PE-2GD5-OC.html

or

http://eu.evga.com/products/moreInfo.asp?pn=02G-P4-3677-KR&family=GeForce%20600%20Series%20Family&uc=EUR


Performance is nearly as good as 690, better then titan and better then 780 and will let me play nearly all games maxxed out that are on market atm or in ~1 year.

However here steps in some of my friends and certain websites that say:
1 video card gaming is always smoother. ( how exactly? )
1 video card is more stable
2 video cards make your system unstable
2 video cards have higher chance of burning
many games aren't optimized for sli
you will have many problems with sli
in order to make sli work you need to tweak a lot

basically all that stuff

I never had two video cards, jet looking on it atm

Why take 1 780, yes its great but why take expensive card, when I can take two 670's cheaper that perform better?

Please from perspective of stability / safety /quality what would be better?

Thank you guys.


P.S. Ignore CRAPWARD 680 4gb in my sig, that video card broke down 3! times for me, and now with Guarantee I can get back money and take smt else.
Edited by cryohellinc - 6/2/13 at 9:37am
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post #2 of 41
Quote:
1 video card gaming is always smoother. ( how exactly? )

Yes, having more than one card sometimes introduces a micro stutter. Look it up if you don't know what it is.
Quote:
1 video card is more stable
2 video cards make your system unstabl

I don't see how this is true as long as the cards are at stable clock speeds.
Quote:
2 video cards have higher chance of burning

What? Yes they do run hotter but what do you mean by "burning"?
Quote:
many games aren't optimized for sli

Some games are not, but it's usually older games in which a single 670 can destroy in by itself. Most newer games that would actually need the extra power have better support.
Quote:
you will have many problems with sli

I personally have not tried it, but for most people it is just plug and play.
Quote:
in order to make sli work you need to tweak a lot

Personally don't know, haven't heard anyone talk about having to tweak a lot before though.
post #3 of 41
Thread Starter 
Quote:
Yes, having more than one card sometimes introduces a micro stutter. Look it up if you don't know what it is.
Yes that too, what exactly is that? I what it is technically, however what can cause it as some have it and some don't? Can it be healed somehow if you have it?

Yes ive also heard its plug and play and no problems, jet some people say differently. Thats why i'm confused.
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post #4 of 41
Quote:
Originally Posted by 100cotton View Post

Yes, having more than one card sometimes introduces a micro stutter. Look it up if you don't know what it is.
On Nvidia cards it's really not all that much of a problem. I'm on a 120hz monitor and I don't notice any more microstutter than with a single card.
Quote:
I don't see how this is true as long as the cards are at stable clock speeds.
Sometimes there are driver problems. I have not experienced any.
Quote:
What? Yes they do run hotter but what do you mean by "burning"?
You need good airflow for this. I have two cards with blower fans, and the top one gets 5-10 degrees hotter than the bottom one. I fixed it by putting a fan next to them, though.
Quote:
Some games are not, but it's usually older games in which a single 670 can destroy in by itself. Most newer games that would actually need the extra power have better support.
That's usually true. Some console games can be terrible, but if they are terribly optimized for SLI, they're probably not going to need all that much power.
Quote:
I personally have not tried it, but for most people it is just plug and play.
I had a problem with LoL randomly dropping to 70FPS, and that was it. It's not like I can't run LoL on a single card, though.
Quote:
Originally Posted by cryohellinc View Post

Yes that too, what exactly is that? I what it is technically, however what can cause it as some have it and some don't? Can it be healed somehow if you have it?
It's an uneven distribution of frames. The actual time that each frame is displayed for is not equal. I think it tends to be that you have two short frames and then one long frame.

Look up PCper's crossfire frame rating review if you want to see an extreme example. Nvidia won't be anywhere close to that bad, and AMD is fixing that problem, though.

Nvidia has two frame rendering styles. If you are microstuttering badly, you can try the other one. I don't know anything else you can do.
Edited by Art Vanelay - 6/2/13 at 10:18am
post #5 of 41
Quote:
Yes that too, what exactly is that? I what it is technically, however what can cause it as some have it and some don't? Can it be healed somehow if you have it?

It is hard for me to explain what it is, but I've seen others explain it well I'll just let someone else chime in here.
Quote:
Yes ive also heard its plug and play and no problems, jet some people say differently. Thats why i'm confused.

My brother used to run SLI 8800gt's, and once we also did SLI 260's for benching. Neither time did we have trouble. I've also used a second card numerous times in my rig for physx and i can't imagine SLI being harder to setup/use.

Actually another time I used some driver hack I found and SLI'ed my gtx560ti with my bro's gtx460 for some fun and had no issues even though it's completely unofficial.
post #6 of 41
670 sli is faster than a 780, but a 780 sli is faster yet. Plus, once overclocked, the 780 can match a titan.
 
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post #7 of 41
Quote:
Originally Posted by Lord Xeb View Post

670 sli is faster than a 780, but a 780 sli is faster yet. Plus, once overclocked, the 780 can match a titan.
I believe 670 SLI OC is faster than a titan.
post #8 of 41
Quote:
Originally Posted by Art Vanelay View Post

I believe 670 SLI OC is faster than a titan.

It is...just not by much until you get to 1440p & 1600p.
Edited by drBlahMan - 6/2/13 at 10:27am
post #9 of 41

If going for new card/cards I would go for a single GTX 780 rather than GTX 670 SLI. GTX 780 has more memory and can be upgraded to SLI later down the road. I myself have GTX 670 SLI and see no need to upgrade. This setup is faster than a Titan for my resolutions (1920x1200 or 1920x1080). 

 

As to microstutter due to SLI I have not noticed any difference with a single card VS SLI. AMD cards have a serious problem with microstutter and crossfire. However, Nvidia uses a better technology to reduce this effect. It should be said that AMD are working on driver updates to fix this. Nvidia has had it hardware coded for a long time. So AMD will have to fix this with only software.

    
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post #10 of 41
If you're going to be gaming at 1080p then don't waste your money on either and get a single 680. I'm running 670s SLI and for me it's a big waste since I don't game over 1920x1080. They looks great in the case but somedays really wish I would have saved the money. If you are going to run multiple monitors then it's worth the money. Another thing to consider between single or multiple GPUs is cooling, I water cool so it cost me twice as much in blocks running SLI than had I bought a single card.
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