different core temps on one chip

[turbotoaster]

been doing some testing on my cpu this morning

core 0 doesnt overclock as good as core 1, since they are gonna be made from the same piece of silcone it doesnt make sense that they should vary largly.

so i can a couple of prime tests

room temp 29c

started off at [email protected]
cpu idle 32c
core 0 load 35c
core 1 load 34c

i did this test 3 times to make sure it was correct.

its only 1c difference but that does get larger the higher the voltage is.

the only thing i can think of is that the compound on the core is better on core 1 than core 0 and if i delid the chip it will even out.

your thoughts, comments please

 

[sablabra]

How can you check each core independently? But yeah, core 0 clocks worse for me as well, could might be bad IHS contact?

 

[Jokester]

The sensor might be closer to one part of the core than the other.

Jokester

 

[mc_bob]

How do you know one core doesnt overclock as well?

MC_Bob

 

[Cyber-Mav]

best thing to do is run the cpu without the IHS since it could be fitted badly and not be making full contact.

 

[turbotoaster]

How do you know one core doesnt overclock as well?

MC_Bob

which core always fails prime first

 

[daveydave]

when i started to overclock my Pen D i ran SP2004 one of my cores...core 1, failed at 4ghz when 0 didnt. When overclocking the core that let me know if it was unstable was always the same core, core 1.

 

[turbotoaster]

try running prime on 1 core at a time, with a stable overclock and write down temps u get on each core.

see if one runs hotter than the other, make sure before each test you let the idle temp drop to its lowest point

 

[PinkFloyd]

not done a prime, but one of my cores is a good deal slower at SuperPi.....
2-3 seconds over 1Mb

 

[lay-z-boy]

reason why 1 clocks better than the other is simple.

Due to a split of power, 1 core will always get slightly more power than the other, this results in 1 core going on and on and the other giving up.
You dont get this problem in dual cpu setups due to each core having its own power source.

 

[turbotoaster]

reason why 1 clocks better than the other is simple.

Due to a split of power, 1 core will always get slightly more power than the other, this results in 1 core going on and on and the other giving up.
You dont get this problem in dual cpu setups due to each core having its own power source.

so why when u run prime on the 1 core that fails prime on its own it still fails at the same time as when running dual prime