Imbalanced core temps

[d_m_mueller]

How normal is it for an i7 920 to have drastically different core temps?

Idle-
44/43/42/39

Load-
72/71/69/68

Also-
I'm working with a 3.4ghz oc at 1.35 volt. does this seem high for that minor of an oc?

i live in san diego, and even still its not too cool, especially in my apt. so my ambients are probably at least 75 degrees.

 

[Deleted member 133315]

normal

 

[DeathPrincess]

Yes thats normal. Mine have 3 degrees different at idle and 2 at max.

When you say the ambient is 75 degrees is that f or c? If it's f then thats pretty amazing unless its phase change

 

[martinje]

On my, core 0 is 5c different from the last core. So under stress prim 95 it looks like this under coretemp

Core 0 = 89
Core 1 = 89
Core 2 = 85
Core 3 = 85
Core 4 = 83
Core 5 = 83
Core 6 = 84
Core 7 = 84

My I7-950 has always been like that for some reason.

 

[drescherjm]

I would not worry about a 1 to 3C difference at all.

For the last poster I can think of a few reasons.

1. Sensor inaccuracy.

2. Lesser cooling on one area of the chip. This could be due to not enough contact / too much / too little heat sink compound

3. Imbalanced scheduling. If the OS is favoring a core for some reason it will be warmer.

 

[DeathPrincess]

On my, core 0 is 5c different from the last core. So under stress prim 95 it looks like this under coretemp

Core 0 = 89
Core 1 = 89
Core 2 = 85
Core 3 = 85
Core 4 = 83
Core 5 = 83
Core 6 = 84
Core 7 = 84

My I7-950 has always been like that for some reason.

You're using speedfan? The i7 chips only have 1 sensor per core (so 4 or 6), whereas speedfan gives 1 per thread (8 or 12) for whatever reason.
Use something like the open hardware monitor which is more accurate and only shows the proper 4, is done by a member of the board and has next to no overhead.

 

[Zero82z]

You're using speedfan? The i7 chips only have 1 sensor per core (so 4 or 6), whereas speedfan gives 1 per thread (8 or 12) for whatever reason.

That's why every pair of cores in his list shares the same temperature. His readings are accurate.

 

[martinje]

I dont know, my Asus Rampage III only shows 32 C for the cpu on idle. Thats on the Asus software monitor utilities. Compare to coretemp ranges from 40 to 46 on idle. I just play it safe and go with the higher readings.

 

[Zero82z]

I dont know, my Asus Rampage III only shows 32 C for the cpu on idle. Thats on the Asus software monitor utilities. Compare to coretemp ranges from 40 to 46 on idle. I just play it safe and go with the higher readings.

The ASUS utility is not accurate. Core Temp is.

 

[Sick Willie]

Yes thats normal. Mine have 3 degrees different at idle and 2 at max.

When you say the ambient is 75 degrees is that f or c? If it's f then thats pretty amazing unless its phase change

LOL. Actually, I'm sure an ambient temperature of 75C would be pretty uncomfortable for any length of time.

 

[drescherjm]

75 degrees Celsius = 167 degrees Fahrenheit

In the parents house the hot water heating system runs at 160F. Holding on to the pipes for more than a few seconds causes serious pain..