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Even after I overclocked it? Seems really odd it stays on the range of 45-48 Celsius.

before overclock

enter image description here

After overclocking enter image description here

I'm scared that the number is not correct and my card is frying.. why could this be?

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how did you check the temperatures? what was the load? – Sathya Jan 22 '13 at 13:56
TechPowerUp GPU-Z and EVGA Precision. Both indicate the same heat. GPU clock went from 520 to 730Mhz and memory stayed in 600Mhz. Does that mean I can keep overclocking the card? I also played half an hour of a 3D game went to 49 Celsius top. – Rufio Jan 22 '13 at 13:59
underclock it. The temperature should drop. In fact, using EVGA Precision implies that you are using a card that is modern enough to underclock itself in Windows, and then clock up to a more powerful setting during a game. Is that happening? If it is, then you should be seeing one (lower) temperature during normal operation, and a second temperature during load operation. What would those temps be? – Bon Gart Jan 22 '13 at 14:02
I am using a really old and deprecated card actually. An nvidia 8400gs. Was that a bad idea? I actually gained 15-20fps in game while over clocking it, but temperatures remained the same. Perhaps I'm confusing Celsius and fahrenheit and 49 Celsius is actually pretty high temperature for the card? – Rufio Jan 22 '13 at 14:08
I really doubt overclocking that card would have gained you 15-20 fps - if it's it's really 45-49 fps then it's fine. The card won't fry, if it goes over the thermal trip point it'll shut down – Sathya Jan 22 '13 at 14:16
up vote 0 down vote accepted

From the pictures you uploaded your card is operating as expected. You'll generally not see much change in temperature unless there is a serious issue such as the fan malfunctioning or the heatsink getting too dirty to properly dissipate heat.

Due to its design if there is a problem with overheating, your GPU will shut down regardless of the temperature being reported in windows.

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um, that's a 200mhz OC on the GPU clock... You should definitely notice a thermal difference. – Not Kyle stop stalking me Jan 22 '13 at 17:15
Yes and this is why I used the term "much change" as opposed to "no change". If you're expecting a double digit rise in degrees Celsius based exclusively on cycle frequency then perhaps one of us is ignorant of the topic at hand. It's not as if I have a masters from MIT or anything so it could certainly be me. – Snesticle Jan 22 '13 at 17:58
You're not guaranteed a double digit increase as every card (even reference cards of the same model) will handle an OC differently. However there will should be a noticeable thermal increase with a 200mhz OC. – Not Kyle stop stalking me Jan 22 '13 at 19:30
Also "Due to its design if there is a problem with overheating, your GPU will shut down regardless of the temperature being reported in windows." is just bad advice. Hitting the thermal trigger for shutdown may save the card from being fried instantly however it will still heavily degrade the semi conductor.… – Not Kyle stop stalking me Jan 22 '13 at 19:34
Thanks for the answers guys. Really helpfull. As Kyle said I read in multiple sites that I was to expect a increase and even a high increase after overclocking the 8400gs. Hoewever I've noticed that even though the card doesn't rise higher than 49 Celsius the driver crashes when getting the card to 730Mhz+ GPU everytime. Could this be due overheating? – Rufio Jan 22 '13 at 22:50

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