whats going on with my usage?

[computerbuildin]

So I noticed with many different things and programs to see my usage %, stuff like that, I noticed that they sort of throttle alot (my cores) and the interesting part about it is the 4th core, Ive got all my other cores down at like.. say about 3%-25ish% while 4th is over here at in the 90's. As im typing this my others are 40ish and my 4th is 80's. This doesnt happen when its idle obviously but im installing diablo 3 beta right now and its doing that 4th core thing, no this doesnt happen ALL the time when im doing the slightest of things, but it happens all the time launching programs, installing programs, and all that stuff. This doesnt happen when im playing a game, all is normal and equal. I dont know anything about usage except.. what it actually means like the usage on each core so im wondering if this is completely normal or not because its happening alot. If anyone is wondering ive never had any problems with my computer. No crashes no anything and even when the 4th core is going on my computer still works perfectly fast and good.

 

[Edgemeal]

I think that is just how Windows task scheduling works. On two WinXP/AMD systems here the last cores seems to get most of the work first. Some things in winXP even seem to be tied to the last core, for example with two PCs doing nothing much more then transferring files between them over a direct 1GB LAN connection the last core on both systems are working and the others are basically idle. I also noticed some DLLs in windows seem to favor the last core over the others as well, like the Windows performance counter that allows you to monitor system performance, the app itself can use any or all cores but the DLL that is used to queue up the results seems to always be using the last core.