j2345912
Funny, I was going to make a thread about this, however decided to be lazy. The only time I have crashes is when afterburner & Riva-tuner statistics server is running(regardless if overclocked or not) If I close those down, my crashes seem to go away. On the same topic, GPU usage is fair for the game, GPU 1 seems to see 85% while GPU 2 seems to always be over 95% usage.  I thought perhaps my 2500K@ 4.6Ghz was causing the not so perfect SLI scaling(bottleneck), however even clocking my 2500K down to 2.5Ghz didn't seem to change much of anything. Right now I think it's fair to say that drivers can still use lots of optimization. I also read the upcoming patch will have a few performance enhancements. The game is still very new, and I am sure will only get better as time progresses

stalinx20

xarot

j2345912
Funny, I was going to make a thread about this, however decided to be lazy. The only time I have crashes is when afterburner & Riva-tuner statistics server is running(regardless if overclocked or not) If I close those down, my crashes seem to go away. On the same topic, GPU usage is fair for the game, GPU 1 seems to see 85% while GPU 2 seems to always be over 95% usage.  I thought perhaps my 2500K@ 4.6Ghz was causing the not so perfect SLI scaling(bottleneck), however even clocking my 2500K down to 2.5Ghz didn't seem to change much of anything. Right now I think it's fair to say that drivers can still use lots of optimization. I also read the upcoming patch will have a few performance enhancements. The game is still very new, and I am sure will only get better as time progresses

Interesting.  From what I read from some analysis was that clock speed does zero difference in this game, just that you have enough cores.
 
I've been busy building my HTPC gaming rig, but what I tested so far was to set my CPU/RAM/cache to stock frequencies and still got crashes. I also uninstalled all monitoring software (EVGA Precision) and GeForce Experience and set PhysX to CPU but I've not had yet the time to test that configuration. If that doesn't help, the logical next step is to try setting my Titan Xs to the non-SC stock frequencies. My GPU usage is around 90 % - 99 % constantly on both cards.
 
This game is soo good, I'd really like to solve this issue soon. 

On the contrary, I have 2 reference 980's, and when I overclock to a certain point on the GPUs (not the CPU) (even with drivers still maintaining stability - meaning everything runs fine, and drivers never crashing, ever) Witcher 3 will continue to crash, and it will be the only program that crashes (but the drivers are still stable). The game will freeze, and I will have a still picture on my monitor. Then a couple seconds later, it will crash directly to desktop. However, when I go to a certain threshold while "overclocking", then Witcher 3 doesn't crash anymore.  This is the only explanation I have on it. I wish I had more on it, but I definitely wouldn't disregard this information. 
 
I have never heard of Witcher 3 requiring a certain amount of cores in order to play. If that were the case then we would have multiple users with 960s and 970s complaining about the issue too because they have less cores than the 980 series, but we don't, not to mention people from AMD possibly having the same problem. Maybe. I haven't really looked into that to hear what they are saying about it, it would be worth looking into, though, to hear their opinions of playing WItcher 3 and the game crashing. What this means it can be anything within our PCs. We have to know we're dealing with a PC, and since we're in the PC world, anything goes, right down to the HDD (I know.. Now I'm preaching to the choir - sorry.) It could just mean that Witcher 3 is just an unstable program and only luckY users won't have issues.  I haven't really checked out people with the 7xx series, either. I'm wondering what kind of issues they are having as well, and if Witcher 3 is causing them problems because of the lack of "cores". But may you are right that it is a core issue, because a couple months ago, wasn't there some complaints being made that Nvidia was not going to optimize the drivers to run better on Witcher 3 while using 7xx series?
 
Just a side note (I know it's useless information, but it's just a reference in most cases) Geforce experience is installed on my PC. PhysX is set to Auto, and it links Physx to second GPU. No crashes. So, I don't know.
 
Xarot, for you, you are running 2 Titan X's. Do you think that 16gb is enough to run this game? Of course it is, but that's not the point with you using (2) TItan X's. I don't have a lot of knowledge about the Titans other than the argument about needing 32gb when using 2x Titans.. So, maybe that's something to consider. Maybe your GPUs are taking the memory from your PC and the game is trying to access some of that ram, but due to having 16gb (with both Titans taking up most of that ram...) Witcher 3 is only able to take a small portion of that, and all it can do then is access the page file...? /shrug. This is only a reference point and I don't know if this would even fix the issue, I'm only providing ideas. I'm definitely going to hear multiple users say "no" on this issue. But you don't know unless you "try it". What happens if you take out 1 Titan, does Witcher 3 still crash?

xarot

stalinx20

xarot

j2345912
Funny, I was going to make a thread about this, however decided to be lazy. The only time I have crashes is when afterburner & Riva-tuner statistics server is running(regardless if overclocked or not) If I close those down, my crashes seem to go away. On the same topic, GPU usage is fair for the game, GPU 1 seems to see 85% while GPU 2 seems to always be over 95% usage.  I thought perhaps my 2500K@ 4.6Ghz was causing the not so perfect SLI scaling(bottleneck), however even clocking my 2500K down to 2.5Ghz didn't seem to change much of anything. Right now I think it's fair to say that drivers can still use lots of optimization. I also read the upcoming patch will have a few performance enhancements. The game is still very new, and I am sure will only get better as time progresses

Interesting.  From what I read from some analysis was that clock speed does zero difference in this game, just that you have enough cores.
 
I've been busy building my HTPC gaming rig, but what I tested so far was to set my CPU/RAM/cache to stock frequencies and still got crashes. I also uninstalled all monitoring software (EVGA Precision) and GeForce Experience and set PhysX to CPU but I've not had yet the time to test that configuration. If that doesn't help, the logical next step is to try setting my Titan Xs to the non-SC stock frequencies. My GPU usage is around 90 % - 99 % constantly on both cards.
 
This game is soo good, I'd really like to solve this issue soon. 

On the contrary, I have 2 reference 980's, and when I overclock to a certain point on the GPUs (not the CPU) (even with drivers still maintaining stability - meaning everything runs fine, and drivers never crashing, ever) Witcher 3 will continue to crash, and it will be the only program that crashes (but the drivers are still stable). The game will freeze, and I will have a still picture on my monitor. Then a couple seconds later, it will crash directly to desktop. However, when I go to a certain threshold while "overclocking", then Witcher 3 doesn't crash anymore.  This is the only explanation I have on it. I wish I had more on it, but I definitely wouldn't disregard this information. 
 
I have never heard of Witcher 3 requiring a certain amount of cores in order to play. If that were the case then we would have multiple users with 960s and 970s complaining about the issue too because they have less cores than the 980 series, but we don't, not to mention people from AMD possibly having the same problem. Maybe. I haven't really looked into that to hear what they are saying about it, it would be worth looking into, though, to hear their opinions of playing WItcher 3 and the game crashing. What this means it can be anything within our PCs. We have to know we're dealing with a PC, and since we're in the PC world, anything goes, right down to the HDD (I know.. Now I'm preaching to the choir - sorry.) It could just mean that Witcher 3 is just an unstable program and only luckY users won't have issues.  I haven't really checked out people with the 7xx series, either. I'm wondering what kind of issues they are having as well, and if Witcher 3 is causing them problems because of the lack of "cores". But may you are right that it is a core issue, because a couple months ago, wasn't there some complaints being made that Nvidia was not going to optimize the drivers to run better on Witcher 3 while using 7xx series?
 
Just a side note (I know it's useless information, but it's just a reference in most cases) Geforce experience is installed on my PC. PhysX is set to Auto, and it links Physx to second GPU. No crashes. So, I don't know.
 
Xarot, for you, you are running 2 Titan X's. Do you think that 16gb is enough to run this game? Of course it is, but that's not the point with you using (2) TItan X's. I don't have a lot of knowledge about the Titans other than the argument about needing 32gb when using 2x Titans.. So, maybe that's something to consider. Maybe your GPUs are taking the memory from your PC and the game is trying to access some of that ram, but due to having 16gb (with both Titans taking up most of that ram...) Witcher 3 is only able to take a small portion of that, and all it can do then is access the page file...? /shrug. This is only a reference point and I don't know if this would even fix the issue, I'm only providing ideas. I'm definitely going to hear multiple users say "no" on this issue. But you don't know unless you "try it". What happens if you take out 1 Titan, does Witcher 3 still crash?

With CPU cores I was referring to an article I cannot find anymore. But here's something similar. But I didn't mean it wouldn't run, just that the experience should be smoother.
 
http://www.pcgamer.com/durantes-witcher-3-analysis-the-alchemy-of-smoothness/

 
It seems that once you have at least 4 threads and above 2.2 GHz then the CPU frequency and threads don't play that big of a difference in this game anymore.
 
Good thinking about the RAM. I haven't read thoroughly about the RAM requirements with Titan X, but I'd assume I could run into issues only when going past certain RAM usage IF the game & drivers are properly coded. NVIDIA's manual refers to 8 GB minimum and 16 GB recommended. If I use Titan X SLI I think I'd need 24 GB just for the Titan Xs and anything on top of that for the actual system to play it 'safe'? So maybe 32 GB/48 GB then.
 
http://www.nvidia.com/content/geforce-gtx/GTX_TITAN_X_User_Guide.pdf
When I monitored the VRAM usage in Witcher 3, it's just a hair above 2 GB per card, so should not run into issues...but then again, who knows. I've been thinking of getting 32 GB or maybe even 64 GB heh, it's nice to have a RAM disk for virtual machines. Too bad I have my old system here too (4960X, 32 GB DDR3-1866 & Rampage IV Black Edition) but since I am on full blown water cooling it would be a bit of a challenge to swap the parts. 
 
Yesterday I was able to play at least one hour without crashes after setting PhysX to CPU, uninstalling all monitoring software and GeForce Experience...but then my whole system crashed as I started to hear this clicking noise from my HDD which apparently died, and Witcher 3 is installed on it. A reboot solved the issue, so I'll have to grab another HDD and continue testing. :)