No need for a fancy site - it's a simple bit correlation, with 1=on and 0=off.  You read right to left starting with physical core zero.  84 in binary is 1010100, thus core 0 will not be used at all, and cores 1, 2 and 3 will have their physical cores used, but not the HT cores.  This is basically the same as 14 (1110) on a 4 core, no HT system.   Which one is "correct" depends on what you're trying to do.  Do you want only the last 3 physical cores enabled in system with HT enabled?  Then 84 is "correct".  Do you want the last three cores with full HT?  Then you want 252 (11111100).  And so on...

 

BTW, the only real "tool" I use for quick'n'dirty decimal to binary conversion when I get much past 16 is the built-in Windows calculator. :-)

 

Scott

 

 

while 244 uses 7 of the 8 total cores.

 

No, 244 gives you this: 11110100

 

Reading from right to left, cores 0 and 1 are not used, core 3 is used,

core 4 is not used and the remaining 5,6,7,8 cores are used.

 

gb.