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Asus M5A99X EVO with FX 8150 in trouble

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post #11 of 13 (permalink) Old 05-17-2020, 06:47 AM - Thread Starter
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So far so good.

I have disassembled all, while the CPU thermal paste was still fine, the one on the Chipset is completely dry and hard as stone (seems there was to much preasure once assembled as not thermal paste between chipset and cooler). The thermal pad for the power stages was pressed very hard to 4 of them while the others will only be slightly touched.

Other parts of this PC:
16GB Corsair DDR3-1333
Samsung Pro SSD 256GB (Windows)


Samsung HDD 1TB (Ubuntu)

Enermax 500W power supply

Now I will try to remove the dry thermal paste and replace the thermal pad.
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post #12 of 13 (permalink) Old 05-20-2020, 07:56 AM - Thread Starter
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After I have reassembled all, the result is still the same as before.

What I have done:
- Thermal pads replaced
- Thermal paste of CPU, north and south bridge
- CMOS reset

I will keep it running at 4.2 GHz with low voltage and very high LLC.
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post #13 of 13 (permalink) Old 05-20-2020, 03:40 PM
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It seems very strange, at least to me, despite the fact that you have the latest bios, and almost everything seems fine, that you had this issue. This motherboard is more than capable to handle that processor not only in stock clock, but with proper cooling, for example a fan blowing directly the vrm, can easily do 4.5 ghz. When you had windows 7 installed, did you observe a crash similar to that when you had windows 10 installed, or the system worked flawlessly all the time? Also, tell us if xmp is enabled, and if you have tried to disable apm from the cpu configuration. Apm is responsible to keep the processor in tdp limits (so even if you had your computer set in high performance mode from windows, the cpu itself when on full load, could downclock and downvolt, simply not to exceed the tdp limit). The other energy features don't affect the performance of the processor, but this one specifically, apm, is known to cause this issue. Also, turbo core should be disabled with apm, as it is preferable for the stability of the system. One more thing to try, is to switch if possible, the ram modules from slots 2 and 4 to 1 and 3 and to check again the performance of the system (if that doesn't work, try with one memory stick, for example in slot 2). It is worth, as you did, checking almost everything in your system, it might definitely be the most beneficial process to check properly your system for errors (it is of course tiring, but the results are worth it).
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