Several months ago, I finally was able to have a "new" computer (a second-hand desktop computer of a little more than 5 years old) for an affordable price (according to my wallet).
The graphic card inside is an nvidia Geforce GT440. I'm very bad in computer things and... I installed Speccy to take a look at temperatures (I think in long-term so it's something I'm used to do, I know overheating is bad for computers), and for Anno1701 for example (it's not the only one of course), my graphic card heats at 80°C. Is this totally normal and I shouldn't worry ? Or is it too much and I should reduce game resolution and options at maximum ? (or even avoid the game)
Thanks in advance for any help :)

Max allowed for yours is 100C, so you are fine.

See here: http://www.nvidia.com/object/product-geforce-gt-440-oem-us.html

It is an acceptable temperature, but I would personally try and lower it. If you feel confident, you could try and clean the fans. That might improve the temps a little bit.

Oh my... sorry for the double thread (I haven't thought of searching "temp", I serached only "heat" in the forum before posting).
Thanks for redirecting me :)
I'm quoting you, if someone come to this thread "Well, below 60 is the ideal, but even slightly above 80 is not a problem. Above 90 is not recommended." So for you, no problem for long gaming sessions ? (as long as it doesn't go higher than 80°C?)
What means exactly the word "throttling" in the solution post ?Even for long gaming sessions ? Oo Isn't this the physical limit before break-down of the card ? Okay ! So this is normal, simply not the "ideal" if I understand well.
Huuum... I'll try to clean the fans (even if they seems not too dusty). Any advice ?

Thanks a lot all for helping ! (and sorry again for duplicated thread)

Although your card may take more, I'd say 80C seems to be a lot for a game like Anno.. My GT425M never exceed 73-74C, even with seriously demanding games and I'm pretty sure I could lower temperatures even more with better thermal paste. You may try OCCT and see what happens.

edit:
If you start getting artifacts, black textures during longer game session, you should worry.

I think too XD Anno 1701 was out 10 years ago, I'm surprised to see my graphic card with that temperature. But that's not the only game to do this, so that's why I preferred to ask for some opinions concerning temperature and gaming without danger :)
Maybe is my graphic card not "efficient" or something like this ? (by the way, I have latest driver installed, of course) Can you explain in few words all of this to a newbie ? :P (what is it?)(is this the same kind of software as speccy ?) No, I didn't encountered anything like this :)

As they say, it's a stability checking tool Tests should show you how stable your current hardware is under pressure : )

Well, I believe your GT440 is more than enough to enjoy Anno in full colour : D
I don't have the game, but I pushed my card up to the limits and even more (Witcher 3, 1024x600@20fps), still with lower temperatures than yours..

Raise the fan speed under load. Use software like Speedfan or EVGA Precision to set up a profile that does this for you. Aim for 75C and less at 100%.

When a GPU reach high temps, it will lower its clock speed to prevent overheating.

edit: also check game fps (frames per second), for a game like Anno you don't really need high fps, so you could try to limit it to see if it helps.

Ok, very reassuring, thank you :) I'll try to lower the temp, but if I can't, I won't worry too much. Is this totally safe if it is a stress test ? The computer I have is a bit old and is second-hand, soooo... is it a good idea to put it "under pressure" ?

What you say and suggestion of MaximumBunny answer makes me think : can't this be something misconfigured in the options of my graphic card ?

Sounds very interesting. Can this be easily configured by someone like me ? (= not at all a "power user")

Okay ! It raises even more technical questions (because I don't know anything concerning the subject) but I don't want to spam you with them XD Thank you for the answer :)

I had a Geforce 9600 GT that ran over 90°C and never froze or anything, my current GTX 770 runs at about 70°C and my old Radeon HD 6770 runs at 50°C, different cards run at different temperatures so if the listings say its within operating limits it's fine.
What you can do is set a framelimit with programs like RTSS or use v-sync, but most of the time it doesn't make a difference in temps.

This is an efficient solution for some games that I finally found after a lot of time struggling with this question of temperatures... Thanks for suggesting it :) (it may help other people like me) I'm using nvidiaInspector, and I think I have understood how to properly set FPS limit for each game. And I'm using FRAPS when I need to check the FPS. Any further advice concerning this ? I know games are usually 60FPS, the few games I limited, I limited them to 30FPS. Is this fine ? Can the FPS limit be set at 40, or 50 FPS ?

For Anno 1701, I tried this solution, unfortunately, even if game seems fine at first look, animated units (birds, people,...) seems to be always lagging (and in addition to be visually disturbing, it may be gamebreaking since settlers have to bring resources manually from production place to storage). I tried this in Anno 1404, and for this game no problem, but Anno 1701... nope.

True, I finally understood this (all of this for a "newbie" like me took me weeks to understand through all the web). But hanks for the tip :)
In fact, through nvidiaInspector, I have by default all games caped at 60FPS (and when I need, I modify the specific config of the game to lower FPS limiter to 30 FPS). Actually concerning Vsinc, in nvidiaInspector I have "Use the 3D application setting". Shall I change it to "force on"?
Okay ! Thanks for helping :) (and reassuring me too)
Honestly, when I put a FPS limit at 30FPS to some games, it can reduce temperature easily of around 5°C (sometimes more, sometimes less, depends of the game). So sometime it's really useful if you've temperature issues.