for the 2080ti the stock settings before it starts to pull back on boost clocks is 84c or 100% power draw. If you feel uncomfortable with the temps can you increase fan speed? 
 
btw look at the new reference AMD Radeon 5700 cards they can cook you eggs.

You could always use the Temp Target and keep the GPU at a certain temp level before reaching it's max temp of 89c.  It will just throttle it's performance and keep itself at the target you set it up as.
 
Also, the blower is ideal for tight small builds since it will blow all that hot mess out the back versus a open cooling platform where it would have exhausted that hot air inside the tight confines of the case which I think would have been even hotter than what you're getting with the blower.
 
If you want lower temps all around and don't care too much about noise levels, I would upgrade those case fans since they're only 1200 RPM max. 
 
Also, if you're able to add a filter up top, I would than switch that to intake but for the time being, keep it as exhaust otherwise you'll just introduce dust all over your components.
 
 

maho08
@blackpanther26
Yep, throttling temp is set at 84C, in which effectively prevent temp >84C. Plan to tweak the GPU fan profile to try to reduce the temp.
 
@CoolGTX / @GTXJackBauer
Noted on the positive flow, might try to change top fan to intake for temp testing.
Am using Noctua NF-A12x25 now at 60% rpm setting. Going to change to about 80-100% depending on noise (am using headphone most of the time anyway)

If you're using those Noctuas, disregard about replacing case fans. lol  Those are some of the top fans to get.
 
I almost forgot to add, you could add a hybrid kit to your GPU for cooler temps.  Now I'm not sure if the GPU's 120mm rad would fit as I'm not even sure what your other CPU cooler is and if it's a AIO, where it would be installed.

Give us a list of your PC for better visualization if you can.

maho08
GPU fan profile works; reduced to 76-80C on load (gaming) though the noise increases.
 
Attached my setup below . I think AIO rad would fit as front intake.

I think a AIO kit would fit perfectly in the front.