Graphics card GPU running too hot?

I just installed an EVGA GTX 570 that my cousin gave me a while back to replace my GTX 650 (had to upgrade power supply). I've been running CUDAminer and over locked the GpU to 765MHz from 732 and turned the fan speed to 100%.

The GPU Temp was 91°C before I pointed an actual fan at the open side of the case and now it's below 80. I touched the side of the card opposite the GPU and it was so hot it burned my fingers. Normally I wouldn't worry about it too much as I've heard of people running cards even hotter but should I worry about leaving it like this 24/7?

Also, I'm afraid that it will run hot even not overclocked when at 100% utilization. I will try this tho and see how hot it gets.

 

GPU's have a rough life for two reasons; they are fitted with low profile insufficient heatsinks and fans, and they are not socket mounted. They are soldered directly to the board with little solder balls (BGA). These balls tend to crack under heat expansion stress because they can not flex like socket pins or LGA pad contacts that CPU's use. I've fitted my GPU with larger fan and heatsink and runs around 45C. Realistically anything under 70C should be alright but the cooler it runs the longer it will last. 70-80C should be OK if you only want a couple years use. 80+ if you don't care to replace your GPU every 9 months or so...

Same goes for laptops and game consoles.

 

Well if you are confident and know how to operate a screwdriver, you could remove the heat sink, clean it up and replace the shit they use for something decent like Arctic Silver.
I recently did that to my EVGA 550 TI and took off the stupid shroud and after the new thermal paste "settled in" after three days my temps dropped about 20 degrees Celsius. That is a rather significant drop and most of it is due to replacing the shit paste they use.
I have been OCing it by 100mhz when I play Skyrim and even then the temps haven't gone over 53c.
I often do that with video cards because they usually just plaster a big glob on there and it can actually hinder heat transfer.

91 c is WAY too hot as I think the top thermal specs for most GPU/CPU's is right at 70c.

 

I've seen some of the factory thermal "paste" that is sometimes used. Some of it is just some kind of square chunk that they slap on under the heatsink and it melts all over the heat sink and chip and can be difficult to remove. Some arctic silver couldn't hurt I guess. Maybe an extra case fan also, tho I'm kinda doing that now with the big fan set up next to the case blowing air into it.

 

larger fans always did the trick for me. however if you wanna be hardcore you can always try liquid cooling.

http://www.legitreviews.com/nzxt-announces-kraken-g10-liquid-cooled-gpu-mounting-kit_129649

 

It has a heatpipe type cooler on it, 2 fans. Taking the shroud off might help, seems like that thing might block airflow quite a bit. This GPU just runs hot tho anyway (and all GPUs with the same architecture) but still, it's almost hot enough to boil water and I don't want it that hot constantly. I'll see what taking the shroud off will do. The heatsink/cooler looks like it would be a lot more efficient if the air blown through it had a free exit.

 

Well on mine in order to get the shroud off, you had to pull the entire heat sink assembly off the GPU, they hide the screws on the underside of the fins, so you may as well clean it up and replace the paste. Use 91-93% iso, but I think you already know that.

 

That's a bummer, I was hoping to be able to see how much difference that by itself would make but when you take the heat sink off you pretty much gotta replace the paste too :/

 

I went to 2 different stores and out of the four types of TIM they had none of em were what I want. There was antec nano diamond with diamond particles but reviews say that it's actually not that good so I'm gonna order some shit from newegg but nobody can agree on which is the best. I used to use arctic silver II in the day but that was back when Overclocking CPU to 450MHz was big shit

 

Arctic Silver is still the best.