Cool GTX
Are you asking about the fan on the radiator ?

sn0warmy
Then I installed a 2nd Thermaltake Pure Plus fan for a push/pull configuration and the card now idles around 30 Celsius (6C cooler) and never surpasses 56 Celsius (8C cooler), even with the same OC settings and over 2 straight hours of BF5 Ultra gameplay at 3440x1440 resolution. Once done gaming, it also drops GPU temps to idle much quicker than it did with a single fan. So notable difference all-around by simply adding a second fan to the mix.

sn0warmy
If you have a single spare fan I recommend adding the Noctua fan as a second fan in a push/pull configuration, rather than replacing the EVGA provided fan. When my 2080 Hybrid arrived, I immediately removed the stock EVGA fan and installed a ThermalTake Pure Plus 12 120mm radiator fan. Initial results showed an idle of around 36 Celsius with max temps getting up to around 64 Celsius after 1 hour of BF5 gameplay on Ultra settings, OCed at +110 clock and +800 memory. 

Then I installed a 2nd Thermaltake Pure Plus fan for a push/pull configuration and the card now idles around 30 Celsius (6C cooler) and never surpasses 56 Celsius (8C cooler), even with the same OC settings and over 2 straight hours of BF5 Ultra gameplay at 3440x1440 resolution. Once done gaming, it also drops GPU temps to idle much quicker than it did with a single fan. So notable difference all-around by simply adding a second fan to the mix.

sn0warmy

AshWilliams1981
Were you able to get that overclock before making the changes to the fans? I just got my FTW3 Hybrid card and can't get it past +70. Memory on the other hand is fine at +1000. Was thinking about exchanging the card to see if I have better luck.

Those overclocks were initially achieved with the single fan setup. Even on the single fan and the relatively high overclock, temps never exceeded 64 Celsius. The second fan only helped improve that already cool GPU temp further.
 
What are your max GPU temps when testing? 

Every single card is going to be different in its overclocking capabilities, temps obviously play a major factor. I've now had a 2080 XC Ultra, 2080 ti Black and 2080 FTW3 Hybrid. What I've found in my testing of all 3 cards is that as soon as you creep past 70 Celsius, they start their initial throttling and begin to drop clocks in order to remain stable. I'd say for top performance you really want the card to remain under 68 Celsius under max load for sustained periods.

The 2080 ti Black was the worst of the 3 with cooling. Even in bone stock settings it was reaching over 80 Celsius and throttling itself to levels of performance that made it notably worse than my 2080 Hybrid in the exact games and game settings (10-15fps lower, in fact). The 2080 ti black would get hot so quickly that I could never get a stable OC of even +7 on the core clock. That card lasted just a few hours in my computer and is still sitting in it's box, ready to go back to Microcenter when I get around to making a trip back there.

sn0warmy

AshWilliams1981
 
When testing the high temp I was seeing was 67-69. Which is kind of shocking to me because before this card I tried the 2080 ti FTW3 Ultra and with that I believe my temps were lower and easily surpassed the overclock I'm seeing now without messing with voltage. Only reason I swapped to the Hybrid FTW was due to the sag on the Ultra card. (Things like that drive me crazy and it seemed to be getting worse.)

Yeah, that's high. How is your radiator mounted in the case and is the fan oriented to pull air from inside the case, through the radiator and out of the case? If not, that's the first thing I'd change to lower temps. And, for the record, the EVGA Hybrid radiator/fan configuration is setup this way out of the box. So if you didn't change the radiator fan you likely are already setup this way. If it is already setup in this fashion, you may want to give push/pull configuration a try and see if it helps you.
 

sn0warmy

AshWilliams1981
The radiator is mounted on the top of the case all the way up front with the the fan pushing air through the radiator and out the top of the case. I've just made a slight change to the fan curve instead of hitting 100% on both fans at 50 degrees I changed it to hit 100% at 40 degrees. After running Heaven for the past two minutes I'm sitting at 61-62 degrees with the high at one point hitting 67. And when idle the card sits around 28 degrees. I'm going to try lowering the voltage a bit to see if I can still sustain the overclock and drop the temp a tad. 

Yep, the orientation is correct and those temps sound much better. I'd mess with memory first. Dropping that down to 800 or 700 will likely help considerably with temps. I've seen and increase upwards of 4 Celsius with a +200 memory overclock shift. I'm sure if I was at +1000 memory my temps would be in the 60's as well.  

Zaf9670
The problem with those Thermaltake fans is that they have worse performance. Static pressure is needed for radiators. I would expect two weaker fans to do better than one strong fan but if what you said is true then you broke that theory first try.
 
The Noctua fans he mentioned have a quieter sound at max and higher airflow + static pressure. So installing dual Noctua should result in the best possible performance if you go by the spec sheets alone.

pabloversace
i just bought the EVGA 2080 ti ftw hybrid and i have 2 noctua NF-F12 chromax . i want to do a push pull on the radiator with those fans. do i have to get a powered fan hub and plug that into the gpu , or can i get a y splitter and plug both the fans into the gpu fan header . and does the fan header on the gpu supply enough power to have both fans going. im just worried about the gpu fan header not being able to power both fans and possibly burning out

pabloversace
wait so will i be fine with plugging both fans into a y splitter and plugging that directly into the gpu? andit will supply enough power to both of them?

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