I have two 780ti Kingpins and they've been excellent since I bought them in 2014, powering my dual monitor setup and the hdmi port connected to my TV. However since the end of last year, they've been acting weird.
The problems just come and go. It ranges from coil whine during gaming, sometimes a blank screen when I start a game on the primary monitor (not the TV) and the only way to get rid of the blank screen is either a hard reset or take out the two DVI cables at the back then plug the primary monitor to the none primary DVI port and then it resets itself and the screen shows again. Sometimes games that I can play at about 80fps on 2560x1440 resolution could barely do 30fps after a restart. The more pronounced problem is if I'm playing a game and the game crashes, if I restart the game, one of the cards downclocks and doesn't go past 800mhz core speed until a hard reset or cold boot, sometimes I even have to unplug the power to the PSU at the back. Which card downclocks is random, today it could be the first card and tomorrow the second card. I've tried alternating between Normal bios switch and the LN2 switch, still the same result. A new one I'm starting to experience is when I switch my primary display to my TV (using HDMI port), sometimes it takes like 2mins for the screen to settle down, by that I mean like when you change the resolution on your monitor and you click apply and there's a momentary flicker, it's like that but it goes on from seconds to minutes.
 
I've tried and tried and tried to find out what the actual problem is but to no avail. 
I've already tried a complete uninstall of drivers using DDU several times and then also tried to a new OS install a couple of times.
I've checked to see that I'm getting consistent power to the GPUs, I've done the bios thing, I've tried GPU-Z (though not really reliable) and more importantly, also both GPUs have the ProbeIT cables that came with the GPUs connected and used my Fluke 287 ( I actually bought this specifically so I can check the voltage readings) to monitor voltage reading, both the +12v, +5v and +3.3, all within nominal readings. I changed my PSU from 1100watt to EVGA Supernova G2 1300W. I've also monitored the NVVDD voltage on and off gameplay sessions and sometimes it idles around 0.9v and then to about 1.35v during gameplay and other times it's at approx 1.3v with no gameplay, sometimes even after a cold boot.
 
Finally today I bit the bullet and started a ticket with EVGA today, they were really really quick with the response, and they emailed me detailed instructions on things to try. Unfortunately these were things I've already tried before but didn't help. So they just said to RMA them. I've started the process, uploaded my invoice for Proof Of Purchase (bought from Scan Computers). 
So now I'm just waiting got the RMA to be approved. All in all, I'm happy so far with the service from them, this is my first ever RMA so fingers crossed. I'm really sad to see these babies go, I mean I bought them and never looked back until now at least. ;-(
 
I'll keep updating the post as the RMA progresses, just thought it'll be nice for people to know that my experience so far with them has been good.

AWK16
Hey, sorry to hear  you cards are creeping out on you. I'm just curious, what board are you using and how hot did your card ever got?
Its really weird that both of your cards are acting up. Is it possible you board not getting required power when needed.

Yeah I know right...it's one of the reasons I waited this long to issue an RMA.  I spent many hours testing them and trying to figure out what the problem is. The temperature never went more than 45degrees (and that's gaming for over 5 hours non stop). I was always aware of the temperature and made sure it doesn't get to 50 degrees.  Still testing them now with Dying Light. I use to be able to play at 4k resolution with the framerate not dipping below 55fps but tonight it's not going even over 34fps (SLI mode).
Unfortunately it was a problem that started slowly but now becoming more frequent.
My main board is Asus Rampage 4 Extreme and yeah I've tried other gpus on the main board just to be sure it's not the pcie slots, I tested each slot one by one. 

Thanks bud, I really liked the cards. I mean I use to tell my friends that unless you have a 980ti kingpin, my 780ti kingpin with happily compete with any 980-whatever out there. I use to think it was a power thing but I've borrowed friends card to test the main board but they all worked perfectly and I also changed psu to 1300watt. In their prime, a single kingpin gets me approx 34fps at 4k playing watch dogs not to mention when sli is enabled and I never had that watchdogs problem when sli is enabled. They were just perfect.

Thanks and yeah, I'll keep the post updated. 

Congrats I'm wondering what replacement you will receive.
Keep us posted

They will, at least what I've seen it in the past, they should give you the opportunity to choose what would be appropriate replacement. Normally if they are out stock of the specific card they will give you something similar in performance or better. I'm sure you can make arrangements what you would be happy with, from what I have seen other users EVGA tries to accommodate their customers, so lets see.
Enjoy your last games before you ship them out
Good luck

I wouldn't settle for anything less than another Kingpin if the 780 ti Kingpin isn't available.

EVGA only offers a replacement that equals or exceeds the performance of the original board if an exact replacement isn't available. In some instances a GTX-780 ti can be replaced with a GTX-970 which will on paper outperform the 780 ti but in this case we are talking about a Kingpin version. The customer paid extra for all of the little perks that go along with owning a Kingpin video board like multiple BIOS switch and an all copper cooler. If a 780ti Kingpin is not available for replacement then the next best solution would be to replace with a pair of 980 Kingpin boards. Personally I wouldn't accept anything less no matter what excuse EVGA comes up with.

If a 780ti Kingpin is not available for replacement then the next best solution would be to replace with a pair of 980 Kingpin boards. Personally I wouldn't accept anything less no matter what excuse EVGA comes up with.

 
I totally agree. I wouldn't even look at 980, that along 970 980Ti maybe but this is just us  speculating and what EVGA decides, well....

Cool GTX

gomson
RMA has been approved this morning, less than 24 hours after contact with EVA,  now that's service people.
Bitter sweet situation. I'm glad it's been approved but sad to have to take them out. I'll arrange for them to be picked up tomorrow recorded delivery and they should get them by Monday afternoon latest.
Ohh, in case anyone is wondering, since I'm in the UK, the delivery address is in the UK. 

Let us know how it goes
 
What were your CPU temps like?
 
 

My cpu Temps average between 21c to 29c and that's during gaming so the cpu has never been a problem nor bottleneck.
 
As others have mentioned regarding what gets sent back, I will have to wait and see. I'm not sure if they contact you to let you know what's been sent back and if you're ok with it but I guess I'll find out soon enough. Everything is all packed up and ready to go now and the courier should be here in the morning to pick the parcel up.
I'll post some pics later when I get on my laptop ( since my pc is out of commission for now)
 

I was just about to ask if you have any pics, maybe of your rig prior to removing you cards, I always like to see someone's setup.
 
They are very nice cards indeed  I really hope you get something respectably close in return.
 

AWK16
I was just about to ask if you have any pics, maybe of your rig prior to removing you cards, I always like to see someone's setup.
 
They are very nice cards indeed  I really hope you get something respectably close in return.
 

The only thing respectable if identical 780 ti Kingpins aren't available would be 980 Kingpins. If they give you something less using the performing better arguement I would be jumping up and down hard enough to set off seismic alarms in China.

Zuhl3156

AWK16
I was just about to ask if you have any pics, maybe of your rig prior to removing you cards, I always like to see someone's setup.
 
They are very nice cards indeed  I really hope you get something respectably close in return.
 

The only thing respectable if identical 780 ti Kingpins aren't available would be 980 Kingpins. If they give you something less using the performing better arguement I would be jumping up and down hard enough to set off seismic alarms in China.

Yeah me too.
However it goes, I'll keep you guys posted.
 
edit:
I case anyone's wondering, the two foam boxes goes in one big cardboard box with bubble wrap at the top and bottom.
Made no sense sending each card separately but since each card has an RMA number I then taped the RMA printout on top of each respective foamy box before putting them in the cardboard box. 
Hope that makes sense.

You are lucky when you can send in normal package.
When I send my card I spend 1h to protect card nice... Than when I enter in post employers told, No you need to use our box and destroy everything with knife and start to make other package as they want even to open original card box to see what is inside.... I live in Idiotic country, idiotic country, nothing else...
Not because they destroy that, because they don't have normal boxes inside as humans... National post, main building for Belgrade.
Because such idiots I hate to send package anywhere...
But never mind any way my RMA finished on worse way like with worse company...
Who knows, maybe I deserve that, you never know...

 
 
 
I presume you from Russia or somewhere  around that area, if that's correct than yeah I know hat you mean
Originally I am from Europe close to Russia very close and they try to pull those tricks  and make people to repack their parcels if it's not their brands, but now since I live in North America I can't tell you that even here they try to manipulate people the same way, especially FedEx it's the worst,  I found DHL or UPS or even Canada Post being the most reasonable, for most part at least.
 
The  difference here is that if you don't let them and stick to your guns they won't force you to do their way and unfortunately there is many people that simply can't stand up for themselves, unless your package is really out of whack than I would understand,  but if you have a brown paper your own box there shouldn't be any problems whatsoever.
 
Overall, times have changed all over the world, since I came here in 89 and now, there's a big degradation in customer service.
 
Unless you live in a very secluded or confined area where there's only one place that provides those kind of services, here you can  pick and choose places that will appreciate your business.
 

Bloody hell, glad I'm not living in any if those areas.