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Do CPU's get more efficient overtime ?

wildman

wildman

wildman

Soldato
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7 Nov 2002
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I ask this question because I cranking my 2500K back up again after having left it sitting at 3.8ghz on 1.1v for a few months. WHen I first built this rig back in March / April the first prime run I did was on 4.4ghz on 1.232v. I know this because I saved the profile in the bios and reloaded it again today after nearly 6 months. I took screenshots back then of coretemp readouts and at full load it was peaking at 73°C.

Today I I have done a prime run again for several hours and the max temp reached was 63°C.

So first thin I though was hmm, it must because the weather is colder now we are in winter, but I remember when I built this rig i was freezing my butt off in March as it was still pretty chilly

http://www.metoffice.gov.uk/climate/uk/2011/march.html

this shows the temps were around 11°C in the south in March 2011 which is pretty much the same as it was today when I ran these tests.

The only thing I can think of is that the thermal paste between the HSF and CPU has cured ? But I am using a H50 and I am sure I read somewhere that the thermal paste that it comes with needs no curing time ?

I am pretty confused as I am looking at almost a 10°C difference. Its good I suppose as it means I could probably clock this a lot harder ?
 
I have a home office and the radiator is never on as I have 2 machines here and they keep the room at a comfortable temperature, especially as one of them is on constantly as it acts as a little file server for me. Its been bugging me all day trying to think what could have been different and I can think of nothing.

Machine is in same location, bios profile is same as I loaded saved one from before. Ambient room temperature is approx the same, around 20°C. I haven't even opened the rig up since I finished the build.

I am of course happy as it is a reduction in temps, but I was curious to know if this was just a result of the CPU 'bedding in', if thats even possible ?
 
Possibly just the thermal paste setting better over time? Can't imagine the CPU changing enough to cause that drop in heat output though!
 
@wildman

I have noticed that my sons i5 2500k also seems to perform better too, similar to yours.
The temps in the house/room can only have changed by 1 -2 degrees if at all (as you say the PC running for most of the day keep the temperature of the room up).
Not only that but it seems to clock better too. I did not keep details of the original overclock, but i know i am getting better clock speeds for the voltage and the temps are also noticeably lower.

I don't know if here is a technical reason (why or why its not possible), but it does seem that either the CPU or MB have worn in.....
I would be interested to know if it is possible for a CPU to improve over time or weather it is just my perception.
 
wannabedamned said:
There is a burn in period, chances are your first tests were taken before things had settled down. Fresh paste, etc.
Click to expand...

My first tests were done immediately after build completion. The first apps loaded to the machine were cpuid, coretemp, prime, gpuid, 3Dmark. SO myabe this is the reason
 
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