locked multiplier on unlocked cpu

cronus.jitter

Commendable
Jul 2, 2018
63
3
1,535
so i have a dell motherboard that allows me to tinker with the cpu multipliers but it will only let me go down and not up i do also have the latest revifion of the bios and a cou that i know for a fact can be overclocked that being the exeon x5660 and its not just this cpu it was also doing it to my i7 930 wich i have seen people push both to 4ghz and im wondering why it wont let me overclock my cpu not even intel xtu is working for me is there any suggestions i can try
 

cronus.jitter

Commendable
Jul 2, 2018
63
3
1,535


don't remember but the motherboard is from a dell xps 9100