edwardsean
Was the fan replacement just for aesthetics or did it improve thermal performance?
 
I tried swapping out the stock fan for a Corsair Mag Lev 120 but it spun really slowly off the lead wire. I rerouted it for power and it spun faster, but the stock fan was still more effective on thermals. I'm wondering if another fan might improve on the standard system. 

I'm running the fan from the motherboards rear sys fan plug in pwm mode and have mapped its speed to the gpu's temperature. It is currently 24c at idle on the desktop.  

rjohnson11
That looks great Marc. Can you post some more complete pics of your build?

Thanks. 
 
I finished the build roughly an hour ago, so once I have carried out some initial tests and I have the side panels back on I will take a couple more photos.

edwardsean
Marc, what are you getting under full load?

I have run a quick test for you. I manually set the fan to full speed.
 
Furmark latest version.
1900x1200  (using old test bench monitor, not my ultrawide predator)
8x msaa
v-sync off
Extreme burn-in selected in settings.
 
Core @1936 Mhz
NZXT fan @1685 Rpm
Max Temp 44c
 
Also...
 
Unigine Superposition 1080p extreme
Max Temp 46c

Iluv2raceit

Jawnathin
The temps on my Hybrid are well under 65C even with my silent fan setting :). Its never gotten even close to that even with the power limit raised and overclocked. Good for idle and for gaming!

When using my custom fan solution, my GTX1080Ti SC2 Hybrid temps never exceed 56C when running burn-in heavy load benchmarks and regular gaming never exceeds 48C
 
NOTE:  Ambient room temperature is 70F (21C).

Those temps are great! I haven't put my computer in a controlled environment so I don't have measurements at 70F but with overclock and power limit @ 120%, my temps range between 44-52C based on fan setting and ambient. I usually leave it on the silent setting 99% of the time and in most conditions it'll settle in at about 48-50C. If the room is warm (summer starting to kick in over here) I have seen it get up to 52C. Going to the standard or the loud fan setting will drop the temps but they are still super low so I leave it on silent. These hybrid coolers are amazing. I really want an AIO for my CPU now as that is currently the loudest component in the system.
 

jlp209
Just received mine today. Highest OC I can maintain stable is 2050mhz using OC of +85 on the core. With this setting the core clock sometimes dips to 2038. Core clock of 2063mhz (+95 - 100 offset) is not stable for me. Interestingly my memory can OC to 12,000mhz but it negatively affects benchmark scores / power limit perhaps. Was curious to see if I could reach it! So my 24/7 settings are +85/+100 = 2050mhz core / 11,200 memory. No abnormal whine or pump noise or anything. Very pleased with the card!

It has been shown in several hardware reviews (Nexus being the main contributor), that overclocking GDDR5X can have a negative impact to overall performance due to memory leaks within the GDDR5X architecture's integration with the Pascal memory controller.  Since the memory controller is designed for a specific bandwidth threshold, there are reads and writes that 'leak' through unprocessed and as a result, frames may not get rendered and displayed which causes skipped frames (perception of 'choppy' gameplay) and lower scores on benchmarks.  It's better to lower your GDDR5X overclock speed and focus more on a GPU overclock (which is hardware limited by Nvidia).  In the end, I've found that for most real world gaming situations, overclocking Pascal past the stock GPU boost speeds doesn't net you very much with regards to any significant performance gains.  It is game dependent of course, so in the end it will be up to you as the owner to determine whether or not a 10-20% performance increase is really worth all the trouble.  For me, it's just not worth it.  Running the SC2 Hybrid with EVGA PrecisionX OC settings with Power Target at 120% and Temp Target at 91C provides enough automated boost over stock settings without have to manually change the GPU or memory speeds.  Just my two cents.  You can, of course do whatever you want

Only reason one should OC their GPU is for benchmarking and possibly folding.  In games, it really is such a small improvement for so much heat created and wattage consumed.

Anyone else get a pair of cards for SLi only to send one back? The gains in SLi just don't really balance out the price. 

RiffyDivine
Anyone else get a pair of cards for SLi only to send one back? The gains in SLi just don't really balance out the price. 

This is exactly the reason why I don't use SLI anymore.  Too much money for the miniscule performance gains.  I used SLI setups for over 10 years and finally moved to a single card with Pascal.  Volta will be more powerful, so I can see (finally) a move away from SLI altogether.  I do believe the best graphics solution is to have a mix of GPUs (i.e. one Nvidia, one AMD) running together with each handling specific graphics instructions for which they are best optimized.  This is part of the reason why software that fully utilizes DX12 and/or Vulkan are supposed to be able to do.  So far we've only seen demos showing off some (not all) of the true performance potential that can be unleased by allowing for this kind of hybrid graphics solution.

So, we have a division in how graphics processing should be in the future.   To make matters worse, software developers (not just for games!) apparently are too lazy or too stupid to develop new multi-media applications/games to be fully optimized for multi-threaded CPUs.  I continue to scratch my head as I have to scream, "WHY!?".  It's not an impossible goal, and a handful of applications and games are optimized to utilize more than 4 cores.  This is 2017 and there is absolutely no excuse why we have to put up with this.  Just venting, but man am I so frustrated at the lazy world of man.

Iluv2raceit
 
It has been shown in several hardware reviews (Nexus being the main contributor), that overclocking GDDR5X can have a negative impact to overall performance due to memory leaks within the GDDR5X architecture's integration with the Pascal memory controller.  Since the memory controller is designed for a specific bandwidth threshold, there are reads and writes that 'leak' through unprocessed and as a result, frames may not get rendered and displayed which causes skipped frames (perception of 'choppy' gameplay) and lower scores on benchmarks.  It's better to lower your GDDR5X overclock speed and focus more on a GPU overclock (which is hardware limited by Nvidia).  In the end, I've found that for most real world gaming situations, overclocking Pascal past the stock GPU boost speeds doesn't net you very much with regards to any significant performance gains.  It is game dependent of course, so in the end it will be up to you as the owner to determine whether or not a 10-20% performance increase is really worth all the trouble.  For me, it's just not worth it.  Running the SC2 Hybrid with EVGA PrecisionX OC settings with Power Target at 120% and Temp Target at 91C provides enough automated boost over stock settings without have to manually change the GPU or memory speeds.  Just my two cents.  You can, of course do whatever you want

Just want to give you a +1 for this. For about a year I'd been having very slight stutter / micro stutter with F1 2016 at high refresh rate w/ G-sync. It's very jarring nonetheless because it's a racing game. Happened with 980 Ti, 1080, and 1080 Ti. All of my cards had slight OC to core and memory. Every game and benchmark I use has / had run flawlessly, except F1. I've never tried running the game with no OC on the memory. Wouldn't you know, with a +85 offset on core and memory at stock the micro stutter is all gone. Can't believe I didn't try this earlier. I'm an idiot. Thanks for this post!

Iluv2raceit
The only real feasible solution is to replace the stock fan with an aftermarket 3rd party 120mm PWM fan and plug it into the motherboard and create a custom fan curve based.  To fair to EVGA, I had to do this with my MSI Seahawk X GTX1080Ti (hybrid) card as it to came with a non-PWM radiator fan.  I used this method and also chose to use a 2-pin Temp sensor to directly monitor the GPU radiator exhaust temperature.  I then created the custom fan curve based off of those temps at idle and full load.  Works great - both GPU temps and fan noise are kept to a minimum unless I am torture testing/heavy benchmarking the GPU.

I'm going for a similar solution with a Noctua NF-F12 PWM and an XSPC 10K wire sensor. Where/how did you attach the probe end of the temp sensor? Simply taped it to one side of the radiator?

My card fan is not spinning either I loaded up heaven benchmark and after only a couple mins temps skyrocketed. Touching the backplate and radiator both burned me. I quickly exited the benchmark Then I noticed even the radiator fan had stopped spinning. I installed the hybrid kit myself on my 980ti and 1080 and never had this problem. I buy the 1080ti pre assembled from evga and it seems faulty.

My fans spin with precision x minimized too. I don't really like precision, I've always used afterburner but if this is the only way to keep my card cool till I find a better solution so be it

Any ETA's when these are coming back to Newegg? They've only been in stock twice. I missed the first window and ordered 1 on the 2nd window. But now I'm trying to get a 2nd for SLI and been patiently waiting since May 26 when they went out of stock. I know the FTW3 Hybrids are coming out but I don't forsee any gains and I'd rather not start returning stuff. Pretty sure the FTW3 is physically bigger so can't SLI the two with my hard HB bridge. This is the problem with EVGAs 1000 different SKU's for each GPU now I mentioned years ago when they started going overboard. There's so many and sometimes so limited that it's very hard to just get a proper SLI rig going. The SC2's may very well already have been replaced by the SC3's only weeks after the SC2 launched. Thanks.

Just sold my GTX 1080 ti SC2 Hybrid.

Had it less than 1 month and it was running fine. Max boost no OC 1924mhz.

But when I saw the FTW3 Hybrid, (Batmoblie Edition)

I knew I have to get it.

I know I am crazy as it will be no gains in Gaming. But the FTW3 Hybrid, sure looks sexy.

The RPM reported is only for the shroud fan, it stays at 0 RPM until power temp hits around 60ºC.
By default, you can't control the rad fan through the VGA, you need to connect it to a fan controller or motherboard fan header.