So this morning I decided to try disabling a couple of cores on my fx 4100 which is currently also overclocked to 4.2ghz. Ive noticed an odd speed increase in just the general feel of windows. It feels much faster over all which is really weird, One would think that the processor would be faster with all its cores enabled but right now its the complete opposite. I remember a while back when this processor released a few tech blogs saying that disabling a core or to would help performance is this true? have I actually done some good and improved performance? Or should I re enable the other cores?
It depends on what youre doing I would imagine. if you disable 1 core in each BD module that would leave with with 2 full cores instead of 4 sudo cores where 2 cores fight for shared resources. Thats what happens you see, cores 0 & 1 share somoe resources so when a multithreaded app runs on them one has to wait for the other to finish before it cvan use the resources and sometimes this can have a detrimental effect on processing. Intels Hyperthreading can sometime have the same negative impact on a program but at least with intel, HT is easy to shut off..
Having some core disabled might allow the CPU to reach a slightly higher clock speed on the remaining cores, which would help single threaded apps. In other words maybe your system is being thermally throttled at the moment.
I don't think this would translate into a large noticeable difference in the feel of Windows. The thing that makes Windows feel slow isn't normally the CPU, it is the disk being used and if you have enough RAM for caching of the disk.
Disabling cores would really hurt applications that are well threaded however. I can't imagine how it could be an overall benefit.