Maybe during the course of the last couple of days and in the past you have noticed that your PC's cooling fan starts screaming like a banshee when you're viewing web pages on NV. This is a problem that I have reported in the past as a bug, commented on in NV functionality discussions and is a problem that comes and goes over the last year due to the roll out of the new Vine. Since its back now and you may or may not be experiencing this problem I thought this would be a good time to show you what causes it and how you can see for yourselves what is going on with your PC and why that FAN is doing what it is.
First of all the Fan spooling up is a reaction to your PC's Central Processing Unit (CPU) work load. When the CPU is working hard, additional cooling is required so the fan comes on. This can be expected to happen with CPU intensive tasks like Game Playing, but not something you expect just loading a web page or doing normal tasks on the PC. This is probably most notable in laptops since they normally run quietly, no power source cooling fans. A desktop on the other hand has power source cooling fan in addition to a CPU cooling fan. Both can spool up during times of high CPU demand. iPhones and iPads without fans can become noticeably warm or hot with a high CPU demand.
We'll concentrate on laptops and desktops running Windows with fans for this article. The best way to see what your CPU is doing at anytime is via the Windows Task Manager. To open and view your Task Manager there are a couple of ways.
- Right click in the task bar and from the small popup menu choose Task Manager.
- Press Ctrl + Shift + Esc or you can use Ctrl + Alt + Delete.
Below is a screen shot of the Task Manager in Win XP.
Clicking on the Performance Tab will show 2 or more Live Graphs depending on what version of Windows and number of PC Processors. The graph we are interested in is the CPU Usage History. Above mine has completed several tasks during the preparation for this article. On my graph each vertical line in the graph represents about 7 seconds of time and the range of usage is from 0 to 100%. The CPU Usage window on the left is instantaneous usage. Leave this Task Manager running while you work and get used to checking on it from time to time.
For instance the above graph (cropped to just show the CPU usage and history) is from today while I was using my photo editor to prepare these images on my desktop. There I allow more apps to run in the background and my CPU idles at 4%. My laptop on the other hand, has less running in the background and the CPU idles at 0%. The last quarter of the History graph shows the normal "Heart Beat" of my desktop at rest or idling. If you watch your task manager you can become familiar with what various operations demand of the CPU and when things are idling or should be. If you view the "Processes" tab (not shown in this article) you can see just what is taxing the CPU, very handy Geek Stuff. For now we're just interested in how hard the CPU has to work and why.
Now in this next shot with just Fire Fox ver. 25 running I am at the ONV column for the first 1/3 of the graph. From the NV tracker I choose to go to my April Fools article about closing ONV and look what happens. There were about 100 comments total there and I was there about 140 seconds or just over 2 minutes to load and then view 1 comment. The whole time I was there, my CPU was basically pegged at 100% demand and that demand did not decrease until I left the page. After the first 10 seconds or so of that, YES the fans spooled up to keep up with heat generated from a very active CPU!!!
Certainly while trying to get to the pages I think we have all experienced the Script Error messages warning of unresponsive script, click to continue if you dare. The whole mess is just way to complicated for the task,,,,, displaying comments in order,,, and what is sad is that it doesn't need to be that way. Even sadder is that it has been this way for over a year. In fairness there are moments that things appear to be running smoothly but they are short lived as one realizes that there is more "New" coming down the pike.
This final image shows the graph of my browser loading SpaceWeather.com and the idle state of the CPU while sitting on that page. There is JS on this page and it serves a purpose but the implimentation of Keep It Simple Stupid (KISS) is not lost on me and is appreciated. NO FANS HERE and I should point out that after your CPU has been cranking like a runaway HEMI and then throttled back, it does take a few moments for sensors to realize things are getting cooler and fans can be turned off.
IMO, these are not deep dark secretes waiting to be discovered, this is a real problem that should have been fixed.