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SLI 1080Ti causes reboots while 4K gaming (SOLVED: 1000 Watts not enough for OCed 1080Ti's) - Page 2

post #11 of 26
I'm running a corsair ax1200i, dual 1080ti's, 6900k @ 4400 ghZ @ 1.380

when running corsair link software, I noticed, at full gpu load, it will spike near or at 1000 watts usage. I'm gonna upgrade to ax1500i for safety, but it could be that you're reaching the limit of that PSU.. Have you tried running with just one GPU at full load?

EDIT: Forgot to mention my 1080ti's are OC'd to around 2050-2100
Edited by KCDC - 4/21/17 at 12:49pm
post #12 of 26
Thread Starter 
Quote:
Originally Posted by KCDC View Post

I'm running a corsair ax1200i, dual 1080ti's, 6900k @ 4400 ghZ @ 1.380

when running corsair link software, I noticed, at full gpu load, it will spike near or at 1000 watts usage. I'm gonna upgrade to ax1500i for safety, but it could be that you're reaching the limit of that PSU.. Have you tried running with just one GPU at full load?

EDIT: Forgot to mention my 1080ti's are OC'd to around 2050-2100

I hate how the evga power supply calculator or reading other posts people say that 1000 watts are more than enough for our setups. My 1080ti's are at 2038 stable (they start at 2050 and then drop) so I guess I could be pushing past 1000 watt. It still doesnt seem right though that we could be pushing past 1000 watts.
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post #13 of 26
I'm pretty sure those calculators work with stock component settings, not overclocked, that would be impossible. The Ti's are stock rated at 220 watts, however we are pushing them closer to 300. and when you add your CPU overclocked, vs the calculators stock info, it will vary.

It's spiking to 1000w, not constant..It will remain constant a bit lower at full load, I idle around 150 watts, basic surfing etc is around 200-300 watts. I'll run it tonight just to confirm and I'll post results. I believe the ti's can't go past 300w each so yes, it does seem odd to me. However with everything else running, maybe it's possible. I remember being pretty surprised when I saw that. the 6900k runs pretty high too since it's OC'd to 4.4

I think you'll like the corsair better anyway just to be able to monitor all power going in and out with Link. Pretty dang handy. Can't understand why other companies don't do this.

Also isn't wildlands extremely resource heavy? It's taxing your cpu and gpus pretty hard. Remember COD bricking xbox 360s due to massive textures and breaking the lead free solder from the GPU? I'm starting to get that same feeling.. hah
Edited by KCDC - 4/21/17 at 2:33pm
post #14 of 26
Thread Starter 
Quote:
Originally Posted by KCDC View Post

I'm pretty sure those calculators work with stock component settings, not overclocked, that would be impossible. The Ti's are stock rated at 220 watts, however we are pushing them closer to 300. and when you add your CPU overclocked, vs the calculators stock info, it will vary.

It's spiking to 1000w, not constant..It will remain constant a bit lower at full load, I idle around 150 watts, basic surfing etc is around 200-300 watts. I'll run it tonight just to confirm and I'll post results. I believe the ti's can't go past 300w each so yes, it does seem odd to me. However with everything else running, maybe it's possible. I remember being pretty surprised when I saw that. the 6900k runs pretty high too since it's OC'd to 4.4

I think you'll like the corsair better anyway just to be able to monitor all power going in and out with Link. Pretty dang handy. Can't understand why other companies don't do this.

Also isn't wildlands extremely resource heavy? It's taxing your cpu and gpus pretty hard. Remember COD bricking xbox 360s due to massive textures and breaking the lead free solder from the GPU? I'm starting to get that same feeling.. hah

That's crazy! The EVGA power calculator supposably accounts for overclocking by checking off a box and it still suggests a 1000w. I am pretty excited to get a 1200w corsair. I always had them but switched to EVGA because it was a bit cheaper; I wont be doing that again.

Yeah Wildlands taxes your system quite a bit but I was also rebooting in Killing Floor 2, which isnt nearly as hard on the computer. I remember the COD bricking vividly -__-

Well I hope you're right! I will update this thread Saturday when I install the new PSU. If that doesn't fix it, then Im not sure what to do next.
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post #15 of 26
Well, it's my thought, and of course I could be wrong since it's just speculation. Since you're swapping PSUs anyway, then no harm. I can say I'm running well with the AX 1200i, so you should be good with the corsair you're getting.

I've been staying in touch on the 1080ti owners forum and there are people hitting 330+ watts with basic voltage curve editing. x2 with everything else running... could be it. Hope it works out and it's not something worse.
post #16 of 26
Thread Starter 
Well I am messing around with voltage curves and locking the 1080Ti's to 1.025 and I havent had a single reboot. It'd seem as if so far you were right.
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post #17 of 26
Just did a firestrike stresstest and I was peaking right around 920 watts, and that was with them both not going above 1850, and it would jump from 700 to 920-30 throughout. I'm guessing that evga PSU is rated to hit 1000 watts, but not hold it. Kind of like car audio amps, they rate them at a peak wattage but have a much lower RMA wattage that they can hold.

It's why I'm upgrading to the 1500, as I fear I may be taking this guy to it's limit.
Edited by KCDC - 4/21/17 at 6:28pm
post #18 of 26
Thread Starter 
Update! I've installed the 1200HXi and not a single crash. Turns out SLI 1080Ti's need more than 1000 watts even if you just give them an small overclock. You would need to limit the volts on stock clocks in order to stay with a 1000w psu. Thanks for all of the responses!
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post #19 of 26
Very glad you got this solved! I'm using a corsair HX1050 PSU with my SLI setup. I haven't had an issue yet but if I do, I'll look to upgrade PSU
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post #20 of 26
Awesome
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