When the talk is about system monitoring, Speccy comes to mind. Open Hardware Monitor is different only because it lists the real-time temperature, load, and clock speed in one simple to use interface without any strings attached. It comes with Sensors that cannot be found elsewhere, such as, it’s CPU core sensors supports Intel’s latest i3/i5/i7 processors and the Hard disks sensors supports S.M.A.R.T.
Another useful feature is Limit. Let me elaborate, most tools display the temperature of your hard disk, which is fancy but they do not detect and display it’s peak limit.
Lets say my GPU core temperature is 91 degree centigrade, now what is the maximum limit that it can handle before it auto shuts down or make my system cook? As you can see in the screenshot below, my GPU has a limit of 127 degree centigrade. To view the limit, it can be enabled from View > Columns menu.
In a similar way you can also see that my CPU Core has a limit of 100 degree centigrade. Now I can keep check on my system and make sure they do not hit their limit. Sounds useful?
Overall, such tools only come useful to those who love to overclock their systems and those who use graphics/processor heavy apps and games.
It is a portable app that works on all versions of Windows, including the latest Windows 7.
Download Open Hardware Monitor
For more, also check out HW Monitor, that looks almost similar to this tool. Both can generate and save output.