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Mosfets on my GTX 460 getting -extremely- hot...

post #1 of 22
Thread Starter 
My GTX 460's heatsink didn't come with a RAM or mosfet spreader, and the mosfet area of my card is getting so hot that I almost think it's going to melt the card itself. I know certain things are meant to get to certain tempuratures, but can these things seriously stand being at the point where they can't even be touched for a millisecond without causing a burn/blister?
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post #2 of 22
Mosfetts can get to over 100C and still be well within the safe zone. However your case does sound a little extreme. Try turning up the fan a little bit?
    
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post #3 of 22
What case do you have? does it have a side fan blowing over the card?
    
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post #4 of 22
Thread Starter 
The case that I have doesn't have a cover on it, let's put it like that. I also have a the heatsink cover off of the GTX's heatsink and I have a third-party fan blowing directly at the mosfets. Touching the back of the card on the other side of where the mosfets are located is so hot that it literally blisters my finger if I leave it there for a complete second.

Edit: The rest of the card isn't getting very hot, the max it's reached in Furmark with all the settings on is 74 C., it's just the end part of the card down there right where the mosfets are.
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post #5 of 22
I would try putting the shroud back on.
    
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post #6 of 22
Faulty psu???
I had a faulty psu with my 460 and that thing drove my mosfet's temps really high really fast.
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post #7 of 22
Quote:
Originally Posted by MoBeeJ;12148371 
Faulty psu???
I had a faulty psu with my 460 and that thing drove my mosfet's temps really high really fast.

This could be it. The mosfetts regulate the voltage and current. If your PSU is putting out bad power then its more work that the mosfetts have to do, in theory.
    
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post #8 of 22
get msi afterburner and enable pcb temp monitor aswell as setting up a fan profile that starts at lower temps than default and peaks earlier.
can we get a pic of your case/card?
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post #9 of 22
You can buy some ramsinks and put them on it. EVGA sells a 460 mosfet heatsink, but it's out of stock right now.
post #10 of 22
Thread Starter 
Shroud back on and my temperatures increased in Furmark from ~74 C. to 82 C. to I immediately took it back off. That was the whole reason I took it off in the first place, the temperatures seemed way too high in Furmark.

Here is the PSU I have:

http://milo.com/raidmax-rx-630z-smart-modular-atx-power-supply-630w

I have MSI AfterBurner and here are the settings that I use:

Core Voltage : 1.062
Core Clock : 875
Shader Clock : 1750
Memory Clock : 2250
Fan Speed% : 70%

I normally use SpeedFan or Furmark to monitor my temperatures while playing games/benchmarking, and the GPU, and the absolute highest I've seen it at was 67 C. and it was only up there for a minute, then it dropped back down to 74 C. Seems to like to stay around 74 C. with the fan set-up on there now. I can take my card out and take an actual picture of it if you want me tom it won't have the shroud on it, and not that one fan blade is broken off (don't worry about this as this card did not come out of my budget). Here are the pics:

First

Second

Third

Fourth

..(sorry about the quality, it's not the best quality and it's hard for me to hold things steady for too long).
Edited by plunx - 1/26/11 at 11:35am
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Rostok
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