PCs can have several sensors in them, case, hard drive and CPU core are the common ones, each of them would have a different range of "normal" temperatures. Also the "normal" CPU core temp (the important one) depends on exactly what CPU you have as they all have a different normal temperatures, AMD's tend to run hotter than intels but even between different models of each brand there are huge variances in the "normal" temp...
That said.. if it's the core temp 43 would be regarded as cold no matter what (the CPU core temp on my laptop often gets well into the 90s if it's really working hard)
As has been said , temperature of what, memory, HDD , main processor,
graphics card, PSU ? ?
See what the program you used says its the temp of and then go to the manafactures site and see the operating temp range specs and that will tell you if its ok
Well, not sure if this is fine, but have heard that the colder computers are the better they work. Could you put your computer in the coldest room in your home then?
Chuck, which AMDs are you referring to? Most AMD CPUs for the last decade have all run cooler than their Intel counterparts. As you say, many Intel parts have max temps of 90c + whereas the majority of AMDs aren't rated above 55-60c.
This question definitely seems to assume all PCs being the same. Even if we know what CPU it is, 43c is probably fine with medium load in a warm room. If that is an idle temp in an air conned basement in Siberia, then that's really hot.