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Sudden increase in CPU temp after RAM volt change

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May 10, 2011 3:34:00 AM

So, I've been running my Phenom II x4 965 @ 4.0GHz on 1.51 volts for a few months now. Until a couple days ago, I was idling around 35-36 degrees and maxing out at 54-55 with my CM H212+ cooler. Recently, I overclocked my 2 DDR3 RAM DIMMS from 1333 to 1600MHz, and to keep it stable I increased the voltage from 1.5 to 1.64. Right away, I noticed I was getting much higher temps, and it continued that way.
I reset the Memory speed and voltage, but I'm still getting higher temps. I reached as high as 58 degrees with playing Bad Company 2, and was idling around 40-45 instead of 35-40. I'm now running it @ 3.7GHz on 1.4 volts, but I'm still idling around 38-40. Something have definitely changed. I reseated the Heatsink with a new thermal paste application, cleaned my dust filters, and used condensed air to clean out the inside (there was almost no dust as is), but the temperatures didn't change at all. I'm pretty frustrated, as now I'm running my CPU slower and still getting higher temps than before.

With this info, is there anything I can do to reset temps back to normal? Could the sensors have become faulty?
If any more info is needed, I'll gladly comply.

Thanks in advance!
a b à CPUs
May 10, 2011 3:39:31 AM

Clocking the ram out of sync with the fsb seems to have an bad affect on overall system performance. From what i heard..
Could you reset your bios to stock settings to see how it goes?
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May 10, 2011 3:48:58 AM

I have, multiple times, even cleared the CMOS, still getting abnormal temps. Have kept RAM at stock speed since the day temps went up.
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a b à CPUs
May 10, 2011 3:57:50 AM

klbg said:
I have, multiple times, even cleared the CMOS, still getting abnormal temps. Have kept RAM at stock speed since the day temps went up.

Summer is coming by the way, it could add a few degrees to your cpu temps
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May 10, 2011 4:11:21 AM

Well I live in Texas so it's hot all year. The AC keeps the room at a constant forced 72 degrees F, and I don't think the change in seasons would account for a 5 degrees temperature increase within a day's time.
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a b à CPUs
May 10, 2011 4:14:20 AM

The memory controller is on the CPU, and now it is working harder with additional voltage.
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May 10, 2011 4:23:24 AM

That makes sense, but I've long since stopped using the additional voltage and reset the memory speed. Why would this effect continue on?
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May 10, 2011 9:11:35 PM

Any other ideas?
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September 1, 2011 8:14:32 PM

It is really interesting to find somebody, who is in the same situation like me. I didn't overclock CPU and didn't look at the CPU temperature, before I bought the memory. Therefore, I cannot tell, what was the original temperature of CPU. I also rose DRAM voltage to 1.64 Volts in order to rich reach 1600 MHz DRAM Frequency and receive the increase of maximum CPU temperature from 58 degrees to 64 degrees at 100% CPU loading with stock cooler.

My config: motherboard M4A79XTD EVO, AMD Phenom x4 965 3.4 GHz C3 125W, GF 9800 GT, Mushkin 4 GB (2x2GB) DDR3 1600 MHz (996805) + G.Skill F3-12800CL6D-4GBPI
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