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I think those temps are fine. Use an app like they mentioned or Asus GPU Tweak to monitor things (my titans are Asus's). The temp ceiling for my 4 titans is 86 degrees, so I have everything set to spin just fast enough to keep them all below that mark (they are all usually between 82-86). I think nvidia says anything below 90 is ok, but you should double check with your specific cards. The Corsair 730T case I have with an H100i all run the fans at about 65% at load (so basically two 140mm fans up front, two more up top, and one more on back). I even have the GPUs OCed a little bit. If you don't care about noise, just manually set the fans to spin higher.

Mine has been running almost none stop for the last month with zero stability (or any other) issues. Octane has been amazing on it..

Thanks Glimpse (as always )

glimpse wrote:However if You don't tweak Your software cards are going to overclock themself & keep temperature around 80-82 anyway =) I think that's set out of the box (as part of boost 2 technology)

That is what's strange. I thought the cards will lower the core clock but right now I get this. GPU 1 + 2 are Titan Z, 3 is the middle card and 4 the at the top.

RobSteady wrote:..

This is what's strange: I just hit 91°C with one of the Titan's but the fanspeed was only at 64% and clock rate constant at 836 MHz.
MSI Afterburner is on Auto

as far as I remember my Titan Black keeps fanspeed ~50-60% to keep temps around 80-82C & running nearlly 1000Mhz, sometimes dropping to 900+

so where's solution? open bios/uefi & tweak fans - especially input - raise them till You're ok with noise..
ASUS has some software that You can tweak fan profiles from windows
& I think some software should be provided with You motherboard
(or You can always get some free)

Your cards clearly starve from fresh air - solve that & Your problems should be gone.

with GPU Boost 2 You can set specific target ..but Yeah if You keep them in "vacum" even that will not help. & remember that TitanZ dumps half of the heat into a case..

Hi Rob,
As inspiration for creating your airflow:

The link above shows you the airflow planned for a Enermax Fulmo tower (i have it with 4x580) but I have different sizes and numbers of fans. I had to skip skip a few from my first config and now have 9 fans. This is the finally use of fans:
- Silverstone AP181 180mm ( 3x left panel )
- Scythe Typhoon 1450Rp 120mm ( 2x fans top panel)
- Scythe Slip Stream 500Rp 120mm ( 1x fan right panel behind cpu)
- Scythe Slip Stream 500Rp 140mm ( 3x fans: 1x for hdd front +1x bottom+ 1x rear)
Cheers,

Ok, I raised the case fan speed to 80% (before it was on 60%). A little bit louder but still ok.
Now I get 82/83°C on the Z and 80/81°C on the two Titan's
Hopefully also for long renders, but it looks a lot better.

here is what helps me during long renders More likely it is ok for stills but during animation rendering you will get cuda 700 errors alot if cards are over 75c

coilbook wrote:..but during animation rendering you will get cuda 700 errors alot if cards are over 75c

ghm, that's why he built a rig that has extra space between cards =) with proper airflow there's no problem running cards stable for even 24/7.

In Your case, coilbook, I'd buy 4x waterblocks, get some fittings, hook everything up with external pump/res combo & connect capable radiator: You'll get temps ~40-50C, little to no noise, piece of mind + some extra performance =)

coilbook wrote:here is what helps me during long renders More likely it is ok for stills but during animation rendering you will get cuda 700 errors alot if cards are over 75c

I have other experience... I do not get cuda errors when doing a five hours rendering for animation and cards over 75c.

And when opening the case for the external big (summer human) fan will mess up the airflow inside the case.
Closed case with good airflow has a direction of airflow... When opening it turbulence will be created.
When I wanted help with this big external fan (I have one on standard and moves from right tot left and back) I sometimes have placed it besides the closed case pointing to side to stimulate air inside the case and also form the outside to the back to get the airflow behind the case and move the exhausted warm air little faster.

Greetz,

Try something like this: