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EVGA Z68 FTW 4 GPUs

I just bought 3 EVGA GTX 670s. Hoping for good 3-way SLI support in the future. So i was wondering could i add a 4th GPU in the future to this mobo if i wanted to. Or is it only 3-way compatible? http://www.newegg.com/Product/Product.aspx?Item=13-188-098&SortField=0&SummaryType=0&Pagesize=10&PurchaseMark=&SelectedRating=-1&VideoOnlyMark=False&VendorMark=&IsFeedbackTab=true&Page=2#scrollFullInfo

Also was contemplating the Asrock Extreme 7. But i did read this only goes up to 16x/8x/8x. http://www.newegg.com/Product/Product.aspx?Item=N82E16813157269&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-RSSDailyDeals-_-na-_-na&AID=10521304&PID=4176827&SID=uyakyvr1ixli
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  1. The only two platforms that can currently 4-WAY SLI are the older X58/LGA 1366 and current X79/LGA 2011.
  2. ok thanks Nikorr
  3. Best answer
  4. ^+1.but i don't think 4-way SLi is worth it.gtx 670 SLi will destroy any game at 1080p and will hold well on eyefinity.
  5. My only issue with 4-WAY is 2GB vRAM on 'most' GTX 600 series *, and clearly the only justification for 3 or 4-WAY SLI is multiple monitors. * the 4GB aren't available readily, about the only way to get (1) is direct sales of EVGA - if you need more you need a friend(s) (1 per household limits).
  6. Ups, I have posted the un-updated stickie : )

    That ASUS P8Z77 WS , I have seen last week,

    great mobo that looked loaded with those GPU's.

    Its probably the best mobo for Z77, IMHO.

    Thanx guys.
  7. Best answer selected by Nikorr.
  8. jaquith said:
    My only issue with 4-WAY is 2GB vRAM on 'most' GTX 600 series *, and clearly the only justification for 3 or 4-WAY SLI is multiple monitors. * the 4GB aren't available readily, about the only way to get (1) is direct sales of EVGA - if you need more you need a friend(s) (1 per household limits).


    I I just bought 3 Asus 3d monitors and going to be running 5760x1080 3d. I was going to wait for the 4gb versions but I saw some 4gb 680 benchmarks and they did not help the performance at 5760x1080 compared to the 2gb versions.
  9. i think that more than 2gb vram will *hardly* make any difference at 5760x1080p setup.not sure about 3d :P
  10. hellfire24 said:
    ^+1.but i don't think 4-way SLi is worth it.gtx 670 SLi will destroy any game at 1080p and will hold well on eyefinity.


    Ya I would have went with the 7970 3gb VRAM with much better 5760x1080 CF scaling, but Nvidia's 3d is soooo much better. I don't think Eyefinity is even 3d compatible. I could be wrong.
  11. not trying to show fanboyism but simply gtx 680>7970 in most cases.2gb vram plenty:)
  12. Up to 2 GPUs yes. But it looks when you go beyond 2 GPUs at 5760x1080 on BF3 with AA all the way up the 680s hit the VRAM wall and the 7970s start to pull way ahead. Or it could be driver issues with 3way and quad 680s.
    http://nl.hardware.info/reviews/2641/7/nvidia-geforce-gtx-680-quad-sli-review-english-version-battlefield-3
  13. LOL do we really need 4-way SLi?
  14. hellfire24 said:
    LOL do we really need 4-way SLi?


    3D Surround in BF3 with the 680sli get 29fps average with ultra settings
  15. ^oh!and what about 4x 680s?
  16. hellfire24 said:
    ^oh!and what about 4x 680s?

    Can't find any benchmarks yet
  17. i don't think the performance gain will justify the extra price tag :(
  18. U could possibly be right. That's why I started with 3x EVGA 670s for $1200, only $200 more than 680sli. It should get me pretty good performance, hopefully. I'm sure I will have to turn down the AA in some games.

    Just pumped to see what 3d Surround looks like. And in faster paced games I can just switch to 5760x1080 in 2d @ 120hz
  19. Swolern said:
    And in faster paced games I can just switch to 5760x1080 in 2d @ 120hz

    now that's a great thing man!
  20. Swolern said:
    I I just bought 3 Asus 3d monitors and going to be running 5760x1080 3d. I was going to wait for the 4gb versions but I saw some 4gb 680 benchmarks and they did not help the performance at 5760x1080 compared to the 2gb versions.

    Games like BF3 especially with high settings are going to run >2GB so you will have a 'vRAM Bottleneck' -- the cure is to lower your settings. Now for 3D count on a vRAM bottleneck. I'm replacing my daughter's older 3-WAY GTX 470 (OC) because on some games it's a wall and I've seen plenty enough evidence to conclude 4GB or forget it.

    For others, look for the problems -- not the exceptions -- that is unless 0~5FPS is your thing or mediocre details. Google is your friend - use it ;) I hate vRAM arguments and I simply don't care to engage folks in a debate -- your rig -- deal with it -- my rig & my way!
  21. jaquith said:
    Games like BF3 especially with high settings are going to run >2GB so you will have a 'vRAM Bottleneck' -- the cure is to lower your settings. Now for 3D count on a vRAM bottleneck. I'm replacing my daughter's older 3-WAY GTX 470 (OC) because on some games it's a wall and I've seen plenty enough evidence to conclude 4GB or forget it.

    For others, look for the problems -- not the exceptions -- that is unless 0~5FPS is your thing or mediocre details. Google is your friend - use it ;) I hate vRAM arguments and I simply don't care to engage folks in a debate -- your rig -- deal with it -- my rig & my way!


    How much does 3d increase VRAM usage? Does 3d double VRAM like it doubles performance needs? I could try to exchange the 670s for the 4gb versions still if I can find some proof that it's going to to make that much of a difference. The benchmarks I've seen between 2gb and 4gb 680 showed no performance difference in bf3 ultra. The link I provided earlier to a different review showed lower framerates in 3-way and 4way sli. I'm not sure that was VRAM bottleneck or driver error.

    Im a bit confused with the vram usage on the 600 series. So im all ears to your suggestions. I know for sure BF3 5760x1080 on ultra uses more than 2gb vram, but these new bechmarks dont show any bottleneck. I found this 690 3d surround review from PCPer. http://www.pcper.com/reviews/Graphics-Cards/NVIDIA-GeForce-GTX-690-Review-Dual-GK104-Kepler-Greatness/3D-Vision-and-3D-Vi

    690 is comparable to 670sli in performance and both have 2gb VRAM x2. So the 690s vram would stay at 2gb and not 4 correct?

    So on PCPer 690 review in shows BF3 5760x1080 with ultra settings at 70fps average. Now when 5760x1080 in 3d it shows 37fps average. So that is @ the normal 1/2 rate that 3d implies on performance, so I don't see a bottleneck there. But I was sure there would be a bottleneck on bf3 at that high setting with 3d surround. So that's why I'm confused.
  22. First of all all of this depends entirely on the game and the game's detail settings. Next, 3D again all depends on the games 'rendering engine' -- some games are better for 3D than others, meaning in order to take full advantage of the 120Hz [60Hz/right | 60Hz/left] you need i.e 120FPS (2D) some games don't have a 50% drop.

    Therefore, for 'myself' and especially with the investment, it seems kinda ... stupid ... to spend all that money for mediocre 3D. Lower details to 'me' pooch the 3D look, and higher details are fine.

    The link is a GTX 690 review, and in reality it's an internal GTX 680 2GB SLI so what you want to compare is GTX 680 2GB SLI in 3D vs GTX 680 4GB SLI in 3D.

    If you want 37FPS then be my guest, I prefer 45FPS+ minimum.

    What we 'try' to do is use the highest possible details and 4xAA or better.

    Again, there's so little information you really need to look for i.e. search for GTX 670 2GB 3-WAY vs GTX 670 4GB 3-WAY + 3D vision and sort through all the BS and find what it takes to hit a 'vRAM bottleneck' -- I didn't make-up the term 'vRAM bottleneck' I know what it takes to hit one. Perhaps once I can get a (3) full length PCB GTX 670 4GB that support EK or Koolance blocks I can run some tests, as it is more than likly we'll be waiting on GTX 680 4GB GPUs due to the blocks. The only thing I hate worst than poor frame rates is the noise of a lawn blower a few feet from my ears.
  23. BTW - you might want to look at this link regarding monitors and get ones with 'LightBoost' ours are pre-LightBoost otherwise you need to play with the brightness/contrast manually which is a PITA - http://www.nvidia.com/object/3d-vision-system-requirements.html
  24. Actually the 690 is 2 down clocked 680s and thats pretty much what 670s are minus a few shaders. So the 690 and 670sli are neck and neck in performance, both at 81fps at stock speeds bf3 ultra 2560x1600


  25. So with that report is why i went with the 670s. So if 670SLI gets about same as 690 (5760x1080 3d @ 37fps) then adding a third 670 should put me at least above 45fps in 3d surround. That is my thinking. Does it sound right to you?
  26. 5 seconds - literally:



    My only issue with the GTX 670 is it's puny PCB and water blocking it. There are a few non-reference GTX 670's with a full length PCB -- imagine the looks of 3 GPU's essentially sawed-off in the midriff.

    The above is with NO AA, so while the frame rates seem good the quality of the renders looks like crap!

    I would 3-WAY SLI either the GTX 670 4GB or ditto GTX 680's.
  27. I've got some buddies online wanting a match...I'll reply if needed tomorrow :)
  28. This might help show you what I'm talking about -> http://www.geforce.com/optimize/guides/battlefield-3-tweak-guide/#9
  29. Thanks. Looks like ill be using FXAA to get the best performance. I cant deal with all that jaggedness.

    I ordered the Gigabyte G1 Sniper 3. Hoping Nvidia fixes their 3-way support soon. Doesnt look like its working properly right now. http://www.guru3d.com/article/geforce-gtx-670-2-and-3way-sli-review/15

    I hope the 680 follows the 580 Tri-SLI scaling trend which was very good.
  30. The GTX 600 series doesn't appear to scale as well as it did in the past relative to AMD in part the HD 7000 series is a much needed improvement, but with your resolution it isn't bad. Again, it depends upon the game and the GPU drivers. Some of the beta drivers have been doing quite well and nVidia is due for some updates soon.

    You need to have blinders on to 5760x1080 and ignore the other benchmarks, scaling 3-WAY with a lesser resolution means little of nothing and is not predictive.

    This is an interesting forum post, and there are some references to vRAM issues. The folks with 2GB will argue to death the issue -- that is until they run across one and either lie about it or simply dummy down their settings to avoid it. See - http://www.evga.com/forums/tm.aspx?m=1537816 ; most of this is relevant to SB-E and PCIe 3.0 and the 'mod' to fix it which is only really relevant to those who 4-WAY.
  31. Awesome. Thanks for all the help jaquith. Im super excited about my new setup. I would have rather went with the 4gb versions but they are nowhere to be found. And my 3 new Asus 3d 120hz monitors are sitting here getting lonely. I saw the EVGA 670 come back in stock and my itchy trigger finger took over, lol. I'm not sure about the exchange policy for EVGA if the 4gb versions come in stock soon..... If not there is always the EVGA set-up program, but dont really want to buy the extra warranty.
  32. Swolern said:
    Awesome. Thanks for all the help jaquith. Im super excited about my new setup. I would have rather went with the 4gb versions but they are nowhere to be found...

    Tell me about it, my daughter is driving me nuts...like Are we there yet??

    Like I said, for the most part you won't have an issue...ENJOY!!! :sol:
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