Well, I Guess I have been away from the Forums WAY too Long!
 
I Just purchased Two GTX 780 Classifieds to replace My Four 560 Ti Classified 448 cores that I had running in 4-Way SLI on my 762 4X SLI Classified MB in the Hopes of buying Two more 780's to have 4-Way SLI Once again like the Last Three 4-Way Setups I have had in the Past, But it Looks like I (We) have been thrown a "Curve Ball"  by EVGA/NVIDIA!
 
The Only POSITIVE's about this is the Fact that I have Only purchased TWO GTX 780 Classifieds so far and not FOUR, Plus the fact that I will NOT be buying Four TITAN's Just to be able to use 4-Way SLI!!
 
EVGA......All I have to Say is This has SEVERELY changed my Mind about Your Products! 
 
PS: Thank GOD I Didn't Buy the Four GTX 780 Classified Hydro Coppers!

Well I'm glad you were spared! I bought them when it was still being advertised as 4 way and had no reason to imagine nvidia would yank it after it having been part of the gtx line for years now just cause they decided gtx was no longer flagship, now titan was/is.
 
they don't know what they're doing. It constantly changes so long as they can make more money! Look at the 780ti kpe. Their has been soooo many versions of the Kepler cards it will make your head spin! Of course the drivers still don't function properly with nvidia tech like SLI and surround the they're launching another to drain the last bit they can from the 700 series since 800 is right around the corner. 
Years ago I could understand why people stayed loyal to nvidia, back when a flagship gpu was 300-400 bucks. However now they jack them up every generation meanwhile cost of living wage haa stayed even or even gone down. They are at an astronomical 700 and nvidia decoded that wasn't enough so it was time for a market shift. Let's make the mainstream card 700 and the flagship/enthusiast line 1000+! 
 
Maybe nezt year we will see a 1200 dollar gtx titan ultra! More than a tv now for a single gpu! Meanwhile they have mods and csrs that ignore pms and post once a week at best on their forums.  They need to take a queue from you guys (evga) in that regard. Let's be real, I spent enough on my graphics solution to pay a dozen mods for a week ffs.
 
anyhow, I'm getting off topic. Just thinking aloud about how eager amds next offering has the potential to make me. They are obviously a wee bit less greedy. They release a product of just as high quality, and just as fast for half the price. Where exactly does the other half go? Not to software or customer service. What are all you loyalists paying for?
 
for now I'm spent (for awhile lol!) I'll be stuck with my four titans which garner me a massive 30fps in ffxiv due to wonky drivers and micro stutter. Quite enjoyable. My fps with one card while not as high at peak is 10x more stable/even.
 
Save yourself some $ and stress my man :p when I did run those 780s in quad , I got a higher 3dmaek score but not by as much as you would think and due to being stuck with old drivers I got worse performance in games than with one less card.
 
(I did notice u said u have tis? If so they support quad, just standard do not. That said, currently if they are anything like my titans, game performance will
be bunk on Atleast some games) 

What Older Drivers are Available that will Allow 4-Way SLI with Four GTX 780 Classifieds?

hallowen
What Older Drivers are Available that will Allow 4-Way SLI with Four GTX 780 Classifieds?

bluvert89
http://hwbot.org/newsflash/2129_simple_inf_modification_enables_4_way_sli_on_geforce_gtx_780___titan_records_in_sight

The driver and the inf file I've tested, they do not work with EVGA X79 Dark and 4 x 780 Classified. Saving you the money.

As I reflect back on my original comment concerning the inability to run 780 GTX's in four way SLI; now that the Titan madness has eased off somewhat, Nvidia is suggesting that if you are going to use their Pascal cards, not only do you not need four way SLI, but even three way SLI. Two Pascals in SLI will be more than enough for anything you care to throw at your PC (4K and all...) -- supposedly. To me, it sounds like Nvidia is just holding back on a technology that is already available, but figures with just a model change on a present GPU and a different driver, they can score a "newer and better" card (For more money, of course...) and keep rolling on what's already available because they are able to get equal or better performance from, say, two 1080 GTX's than three or more 970 or 980 GPU's.
 
I suppose that's what marketing is all about, particularly when AMD will likely never catch up no matter what they promise is in the pipeline. I just built a new rig on an EVGA  Z170 Classified 4-Way 151-SS-E179-K (For some reason, EVGA has discontinued this motherboard, I wonder why? They could have upgraded it to include M.2 as they did with the X99-II.) with four GTX 970's and have just started building a new rig on an EVGA Z170 Classified K 142-SS-E178-KR, and it only supports two way SLI, regardless of the flavor of GPU you choose from Nvidia. 
 
Is it a limitation imposed by EVGA because no one will ever buy anything but Pascal cards, or because Nvidia's future drivers, like it has happened before, will support only two way SLI whether you have Pascal cards or not? EVGA's X99 FTW board supposedly will support four way SLI, but does that mean that it will do so as long as you don't go any better than an 980 GTX ti's?
 
Maybe, we really don't need four way SLI, particularly if the folks that write the games maxed out on a 34" 4K monitor and run flawlessly on either one or two GPU's. Maybe four way SLI is a greater hardship on PC aficionados than I realize. But the truth is, that a custom box with all the trimmings is but the beginning of, at least, my fascination with PCs as a custom builder. I know there are many differing opinions out there, but for those who understand what I am getting at, I would hate to think that before we know it, a smartphone or a tablet will make the custom built PC a relic of the past.
 
I almost view a PC as a sports car; how many horsepower are too many?