Sorry, it's explained in the test. As I don't have a single core I use the same X2 4400@2640Mhz but with the afinity changed to use only one core. That way I stress only one core. Anyway, that's a little advantage as windows related apps works on the other core. Little advantage anyway
The Lable means:
Single --> one core only CPU test
Dual --> Both cores CPU Test
Single+ 1SPI --> Cpu test+1SuperPi at the same time in one core
Dual+ 1SPI --> Cpu test+1SuperPi at the same time using both cores
+2SPI--> 2SuprPi +Cpu test @the same time
+3 SPI --> 3 SuperPi + Cpu test at the same time
PD: Using SuperPi 8M