Only Pentium 3's do not support running 64 bit operating systems Or there are others processors as well

Question

Hi,
I was told that 'Unfortunately Pentium 3's do not support running 64 bit operating systems.'
However, I really noticed many other people say that I should run a hardware reading program, such as 'SecurAble' to be sure that my processor will be capable to run 64Bit operating systems or not.
Thus, if [b]only Pentium 3's [/b]do not support running 64 bit operating systems, then there is no need from running such a program(screen shot below).
I really run this program using Windows 7(64Bit) with HP Laptop Core i5. And this is the reslut:
64-Bit Processing Available
This processor does offer 64-bit modes of operation. This means that this system is able to run the significantly more secure 64-bit versions of Microsoft's Windows XP and Vista operating systems.
The biggest challenge for 64-bit Windows systems is the fact that existing 32-bit device drivers cannot be used by the 64-bit operating system kernel. So if you do plan to try switching to 64-bit Windows, you should be sure to have a means for reverting
to 32-bit operation if your system's hardware turns out to be incompatible with 64-bit operation. Many people have reverted to 32-bit operation after bravely giving 64-bits a try for a short time.
A man should convert his anger and sadness into strength to continue living in this life.

Answer 1

Pentium 4 CPU s may or may not be 64bit capable depending on the specific model.  Intel introduced 64bit versions after a number of 32bit only models. All mainstream later Intel CPU's are 64bit capable.  The Atom processor may be 32 or 64 bit capable.
There is similar path with AMD CPU's, e.g. early Athlons were 32bit only, with later models 64 bit capable.