Amd A8 3850 Running Hot And Shutting Down Windows

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cadauctions31

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Jan 22, 2015
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I have been building and repairing computers for 8 years, and I cannot figure out how to fix this. I have a MSI a75ma and the AMD A8 3850 Llano Quad and I totally understand the thermal margin, and everything. I installed all thrid party softwares for overclocking, and Speed fan, and HwMonitor Etc. and I just cannot lower temps when playing games. It idles at a great temperature. HWmonitor shows max of 29.1 c when idling. But when I play games it goes way up to 71c and then at times it shuts down the computer. It was always shutting down the computer when gaming until I put new thermal paste on 12 times to get it to this point. I have an after market cooler the Enermax ETS-T40-TB, and I have a spotless case made for gaming. I Dont have much in the way of extras in the case. I have
Nvidia EVGA SuperClocked 01G-P3-1363-KR GeForce GTX 460
Two Sata 3.5 drives
and about three case fans.
Thing is I know something strange is going on because if I go into Bios, you can watch the temps go up like a clock counting seconds until it hits 80c then shuts off.
I did an update to the bios and still no change. When I put the thermal paste on the temps are at highest 50c until the next day when the paste has set and then it hits the temps listed above.
I am at a loss. I have no idea what to do. Is there some kind of setting ot change in bios, or something? I also underclocked the APU to see if it would help but it did not. And I do not overclock. Every clock is at stock.

Please help me?
 
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1LiquidPC

1LiquidPC

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Possible you got a defective cooler? I replaced a notebook heatpipe assembly recently that fixed an overheat/shutdown problem. The fan worked fine, attached to the replacement. It's possible the heatpipe fluid isn't there, leaked out during assembly. Sounds crazy but you can look it up. Have you tried mounting the plain boxed OEM cooler to see what happens? I have an HTPC using an A6-3650 Llano in a small DVR sized case w/ minimal other hardware(no discrete graphics), and it runs fine for encoding w/ handbrake for hours with no shutoff. Also, since you GTX 460 is Fermi based, could it be the radiant heat inside your chassis heating up the nearby CPU? Tried running with case open?
 
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cadauctions31

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Jan 22, 2015
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I have tried switching back to the stock cooler it actually made it much worse. The case is also open. What is the cooler fluid? Have not heard of this before. That could be it though. I was thinking the cooler might be the problem. Maybe I will try to order one tonight. Is there a way to find out if the fluid ran out of it? Also just a few minutes ago it shut down agian after about 1 hour of playing Mafia 2.
 
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1LiquidPC

1LiquidPC

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If the stock cooler is doing the same thing/worse, it's not going to be a cooler problem. Here's an old article explaining them better. http://www.ocmodshop.com/heat-pipes-explained/ I would say it's a pretty rare type of thing that can happen. Even though your aftermarket cooler may or may not be compatible, it wouldn't explain why your stock cooler has the same problem. Since you've tried BIOS updates, remounts, 2 coolers, and the case itself is open, I'm starting to think it might just be a bad cpu. Maybe bad contact between the die itself, TIM, and the underside of the heatspreader.
 
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cadauctions31

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Jan 22, 2015
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The stock coolers for these APU's are commonly not efficient enough to cool for gaming, but the cooler I have was purchased in 2012 and has done a fair job of cooling until now. This just started happening about 4 months ago so that is why I am thinking that the cooler might be the problem. I wish I had another one to try but unfortunately I don't. Was looking at the black edition of the cooler I have. It is $50 on newegg but I don't really want to spend if that is not the problem. I actually had to buy another PSU which set me back $100 last month.
 
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cadauctions31

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Jan 22, 2015
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I actually was looking at a liquid cooler, and considering using one, but I just don't want to spend all the money and fins out that it is not the cooler. I did remember though that I built my son a similar system but with the A6 and he has the same motherboard. I think I am going to try his cooler and if it works I will post it. If not then I am really considering not using AMD anymore. I love AMD but this is ridiculous. It is a ongoing problem with this line of APU's yet they have not tried to address the problem.


 
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1LiquidPC

1LiquidPC

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Hopefully the other cooler will solve the problem, at least you'll know what is was then. Funny you brought up the APU ongoing problem, didn't actually see that, but since you mentioned it, the notebook I mentioned earlier in the post, the one with the heatpipe replacement, was also an APU.
 
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cadauctions31

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Jan 22, 2015
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Yeah for some reason they changed the way the thermal range works and I suspect it has something to so with that (Thermal Margin). It is just a hunch, but I think that some motherboard bios don't know how to interact with that so it shows that it is overheating because one ongoing truth I have found in forums is that when they are overheating you can feel the cooler and it is very cool to the touch which would indicate to me that they are not really overheating but bios thinks they are. Also when I go into bios the temperature just goes up like a clock counting seconds. I have no idea how a processor could overheat in bios within seconds. Its just very strange. I think AMD overlooked something but does not care to look into it. But on a personal note, I greatly appreciate your help with this. Toms hardware is the only site I have ever used and so far everyone has been very kind, including you. God bless and I will post my results.
 
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1LiquidPC

1LiquidPC

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Just trying to help :) Also wanted to ask, since I forgot about it until you just brought it up. The "thermal margin" can only be correctly read using AMD's overdrive software. I did have yet another APU upgrade for someone's son recently for a budget gaming rig. I upgraded the APU in it, and it was showing idling at 75-80C in I believe both the BIOS and using my usual Realtemp/Coretemp/Speccy to get such readings. After some reading into it, I found out about the AMD Overdrive software pkg. Sure enough, using that it would still read 80C idle, but it actually goes DOWN, when you increase the load/temps. The closer you get to 0, the closer your are to overheating. I think I got it into the low 20's full CPU load on purpose w/ stress test software using stock cooler. I tried multiple remounts, fan airflow direction changes, adding a fan, side panel off ect. till I figured out what was going on. Might want to try this and run something like Prime95 and see what happens with temps during test.
 
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cadauctions31

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Jan 22, 2015
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1LiquidPC Sorry it took so long to reply I never got notified that you responded again. I did try the overdrive software, and it didn't change anything. It actually made my APU wattage go from 93 to 107 which made it hotter. Although I admit I don't know about overclocking because I never had a need for it. All of my games are older.... FSX, Mafia2, Deer Hunter 2004, 2005, and just using IE 11 to type this message I have peaked at 44c in hwmonitor. I cleared the min/max before I opened IE to see what temps I would hit. I have another question though. I hope its not a stupid one. What would happen if I lightly sanded the processor top, and the heatsink bottom to clean it up and make the metals bare again? Could it hurt?
 
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1LiquidPC

1LiquidPC

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Well, I've never tried myself, but plenty of people "lapped the CPU". If done correctly, you can lower temps. However, you run the risk of increasing temps or damaging CPU if done incorrectly. There are video tutorials out there if you look. The reason is the CPU heatspreader can be slightly convex, and the heatsink bottom be concave, though this might be reversed. I believe they are made this way because of mounting pressure from installed heatsink. Anyways, best case is that it could lower temps, but I'm thinking 10C at best. Couldn't say for sure how this applies today without looking into further myself.
 
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