CPU temp much higher than core temp. Some help please.

Originally Posted by AndyChow 

First, short story. I have an FX-8150 on a Asus Sabertooth 990fx. My cpu temp was going up to 65C on prime. But my core temps weren't that high (55C). I'm using HWMonitor, ie CPUID Hardware monitor. Should I be worried? Why is this happening?
Longer story. I had my rig set up with the stock cooler. I didn't like the temps so I bought the Noctua NH-D14. I also decided to buy the MX-4 thermal compound, even through it's just about 1C cooler than the NT-H1. Installing it proved impossible, as my crappy ram was too tall (Corsair Vengance 1600, which had two bad sticks out of four, but two bad sticks from two different 2*4Gb kits, so can't RMA unless I'm willing to be without a computer for a while). So it doesn't fit with two of those sticks in the second and forth position, the fins hit the ram fins by about a millimetre.
So I installed back the stock cooler, until I get my 4*8Gb mushkin silverline ram kit. But I cleaned it well. and used the MX-4 to seal the deal. The temps are now ok. The max I get from prime95 are 61C for the cpu after 30 minutes, and 52C on the cores.
And on idle, I'm getting 47C cpu temp, and 33C core temps. The ambient temperature is 31C. So I should be amazed, right? The delta is only 2C from the room.
But why is the cpu temp so high? Mainboard is 34C. Asus thermal radar shows my VCORE1 at 46C. So what should I trust? Cpu or core temps? And whose ever heard of a 14-15C difference between cpu and core temps? What's going on?
I don't want to know if I should be worried of those temps. I want to know why there is such a huge difference in the readings. And who's right. Latest firmware, latest drivers, latest versions. What's going on?

Originally Posted by airdeano 

core temperature is what is crucial. socket temp is important, but not for what we
look for in diagnosis.
is this with an overclock or stock settings?
the d-14 should let you traverse the 120mm fan upwards to clear the RAM.
Noctua Board/RAM compatibility.
unless your case is that narrow.
airdeano

Originally Posted by AndyChow 

I know Vcore1 is the stuff that supplies the voltage to the cpu, and not the cpu. But the temperatures of that should be similar to the cpu, at least on the sabertooth. It seems logical, the same amount of electrons flow through it. Coretemp lower than motherboard? Doesn't make sense.
I also know that core temps is "all that matters". However, could it be wrong? How can the cores only be 2C higher than room temperature? We're talking about the BD 8150 here, not an efficient chip, even at idle.
So let's say that often the cpu temp sensor isn't worth anything. Can the core temps also be wrong?
TheAMDMan, did you read my post? I am using HWMonitor. Version 1.19.0, driver version 135.

Originally Posted by theamdman 

The original corsair vengance modules WILL NOT fit under the d14, i don't care what the compatibility list says.

Originally Posted by mtraccer 

my vengance ram fit under that cooler with the fan mounted in a higher position and the temps stayed the same thankyou.