what does the error: illegal sumout mean?

[Shivam15]

i am getting this error in prime 95 while testing my oc. What could this error be about>?

 

[Dark Lord of Tech]

Unstable overclock.

 

[Shivam15]

I know that. As in i should up the voltage?

 

[Dark Lord of Tech]

What CPU are you overclocking.

 

[Shivam15]

Am overclocking the fx 6300

 

[Dark Lord of Tech]

Specs?

 

[Shivam15]

amd fx 6300
asus m5a97 r2.0--- mobo
corsair cx500-- psu
cm hyper tx3 evo--- cpu cooler