OC question

Ampha

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im quite new to overclocking
do this mean i have overclocked my cpu to 4.1 ?
pc.png
 
41 X 103.44 = 4240.99mhz

41 = multiplier
103.44 = bus speed
4240.99 = cpu speed

so u are a little over 4.2ghz
 
What did you use to overclock your CPU? BIOS or EasyTune?

Next time, also post the Memory & SPD tabs of CPU-z. The SPD tab is just to see what brand + model memory modules you have, as well as the voltage that you're running it at.
 
Odd that you have a 22 degree variance from core 1 to the other 3 cores. You might want to keep an eye on that. If it persists, then try re-seating your cooler. The Idle temps below 40 are fine. Try keep max temps under 60. But otherwise it all seems fine.
 
I think your performance could be slightly better if you rather leave the Bus speed at 100MHz and then decrease your RAM (CAS & RAS) latencies.
I think you have corsair Vengence memory modules rated at 9-9-9-24 or 8-8-8-24, which is why I asked for the SPD tab.
Currently you're running it at 10-10-10-25 @ 1*653.4MHz.
 
I also noted the ram timings, my Vengeance are CL9... Not on my home PC at the moment, so cant confirm everything, but I also run 100mhz bus and only mildly OC to 3.8ghz on my 2600k.
 
Last edited:
IRG:
The difference in core temperatures might be due to the poor heat conductivity on the Ivy Bridge CPU's. This is 1 reason why I'm not buying Ivy Bridge at this moment, because I'd like to overclock it to its limit.

It could also be that the heatsink isn't making good contact (like you said), but I doubt that it's due to that ;)
 
IRG:
The difference in core temperatures might be due to the poor heat conductivity on the Ivy Bridge CPU's. This is 1 reason why I'm not buying Ivy Bridge at this moment, because I'd like to overclock it to its limit.

It could also be that the heatsink isn't making good contact (like you said), but I doubt that it's due to that ;)

Damn... have not followed the Ivy bridge development, so if thats tru, sad! If thats the case then if you dont mind voiding the warrenty, lap the CPU and cooler. 20 degrees difference is major!
 
Looking at the core temps as well as the CPU load, it seems like the difference in temperature between core 1 and the other 3 cores is solely due to that core being utilized more than the others. As shown in the picture, CPU load is only 13.6%, which is just slightly more than 1/8th, meaning a single thread is being used to 100%, with a bit of utilization on the other 7 threads (Remember, 4 cores, 8 threads). If you take a look at the MAXIMUM section, you'll see the core temperatures are much closer to each other under (what I presume to be) full load.

If you could perhaps run something like Prime95 (the one optimized for multiple threads) or any other stress-test program, and then post the core temperatures after they've reached steady-state, it would give us a better indication of the thermal performance of your CPU.
 
Overclocking and just checking stability under Idle is silly,you need to stress test it a bit to see what's your max stable,then start finetuning from there
 
Damn... have not followed the Ivy bridge development, so if thats tru, sad! If thats the case then if you dont mind voiding the warrenty, lap the CPU and cooler. 20 degrees difference is major!
Lapping won't help. It is a "fault" with how the CPU was manufactured / designed.

You can read up here: http://www.eteknix.com/news/ivy-bridge-heat-problems-remain-even-after-ihs-removal/
and here if that wasn't enough detail: http://www.cpu-world.com/news_2012/2012042801_Why_Is_Ivy_Bridge_So_Hot_.html

You'll notice that in the first link the 1 core was also hotter than the others during idle - just like the original poster has.
 
Are you using the stock cooler? Because I won't recommend that you overclock at all on the stock Intel cooler. 80'C+ is pretty darn hot for a sub 4.5GHz overclock!
 
TJ max for IB is 105°C, so 90°C is really not a cause for concern

edit: although on air cooling I wouldnt venture passed 1.25V for 24/7 use
 
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