Got one of these cards, and seems really nice in looks, but I questioned its performance. But I heard
theirs a switch just left of power cable headers. What does it really do? is it dual bios, and does it unlock 
more speed? Reason I am curious is. I have a Dark 299 and 7820x cpu at 4700 mhz. and I notice in evga
precision power limit seems to get only to 88% use. butg clocks are fine around 2100 gpu and 7000 mem.
 
Is the position of the switch to the left holding back more power to this card? I even have power slider in X1 to 30
and can't finish 3d mark demos

From looking at the evga 2070 logo and power connectors right of switch, its default is in left mode, do I switch to right for more 
power? or is default the oc mode select?

I found it and selected oc, then restarted pc, now COD MW doesn't crash, and I can move slider to 130% in Precision X1. but
seems FPS still shows about the same in games I keep track of in benchmarks. What does this switch do for adjusting sliders 
in X1?

Yeah, I noticed that. So what control in Precision X1 does moving this switch do? cuz 3dmark still fails testing, but COD
works fine now. 

As far as 3d mark don't do any CPU, memory or GPU OC and see if it runs if it does then you'll know it's an OC setting.

It crashed in both switches. even with defaults in X1, it won't pass the time spy one. 
Maybe its a windows issue, not sure. it was fine with port roayal.

Actually im not ocing atm, cuz of Call Of Duty, but it runs great now and shows power limit between 80 and 100% which I assume 
GPU is getting its full power. When I was on GTX 1070's in SLI, I seen this too on some 1080P runs, but 4k
runs seem to pass.
 
Is their some special voltage or setting in UEFI in EVGA Dark 299 I am missing?

I moved back to OCing CPU, cuz I decided to troubleshoot and leave cpu to auto , and no crashes in games, but
3dmark demos still seem to fail on some runs. 

In Time Spy it passes the first video, but 2nd one, it shows 0 pass. the bar shows blue below, than red in middle. and using
RM1000 PS and was at default cpu speed with intel boost to 4000 mhz. And I use Precision X1 with defaults and card bios slider
to OC now.

It used to be higher performance with the switch but for now, they changed it so only the fan curve is more aggressive unless they changed it with SUPERs but haven't heard anything.
 
Give us a complete list of your PC, including PSU, case, temps prior to crashing, etc.

dmann304
EVGA Dark 299
PS Corsair RM1000
Intel I7 7820x
32 gigs ddr4 vengeance pro profile 1 xmp 3200
4700 MHz with 1.265vcore 1.85 vinn vcore. 
mesh 30, auto on all other OCing options in UEFI
Intel Extreme tuner passes all tests and games don't crash now. but 3dmark 2nd run of tests.

Thank you for that. 

What are the temps you are seeing during those successful and unsuccessful bench runs?

There other who have mentioned about the crashes in 3dmark. I do run the card I have now with a 130 
power target and 100 vcore and a 705 mem, and seems good, but when I move slider for GPU, COD MW
gives me a dev6068 error in game and crashes.

Beginning to think that myself too. Some claim its an overlay issue, and dx12 issue too. just to weird that im not really  pushing my gear much.

dmann304
Seems to be the issue with game is dx raytracing, turned it off, and game doesn't crash even with oc in precision x1. 
card runs damn good now, but strange that I doesn't get hotter then the 50s in Celcius. 

Glad it all worked out but hopefully future CoD MW and Nvidia updates remedy those issues.  

Dude CoD is just a mess!!!!
I have random crashes and DirectX errors since day one. Running stock or running OC i will allways have crashes!!!
I play a lot of different games and CoD is the only one crashing...
 
Maybe something wrong with your card? I can go through TimeSpy with +135 clock and +1350 memory (games don´t like it after a couple of hours so now I'm running +120 clock and +1200 memory) with slider on the left and temps at 61ºC. I can´t go higher because I reach TDP limit.