AMD Athlon II X2 250 Overclock

[Mitorax]

Hi, this is my first post here. So I have an AMD Athlon II X2 250 processor which is quite old already and I'm planning for an upgrade, but meanwhile I want to overclock it for a better performance in games. And basically I need help. So far I've managed to go up to 3.6 just by setting the bus to 240 without any voltage and it's super stable. The temps are 30-35 degrees. But I want to go further but dont know what to do. I have a 650W power supply and good cooling.
These are my specs:
http://imgur.com/fX9rLSf
http://imgur.com/BhPrxsE
http://imgur.com/vjJsdFv
http://imgur.com/pJ2s5FQ
Feel free to ask me for any additional info.

 

[CompGee]

Change your multiplier. Also increase the bus clock, though that may decrease the performance of anything connected to the PCI or PCI-E slots. If your system begins to experience issues, try SLIGHTLY raising the voltage. If that doesn't work, lower the multiplier or bus speed slightly.

 

[Mitorax]

There are various multipliers. I don't know which one do you mean. If it's the cpu multiplier this one's locked so it can't be raised, it can only be decreased

 

[CompGee]

Photo of BIOS please? Thanks!

 

[Mitorax]

Photo of BIOS please? Thanks!

http://imgur.com/B6r4Jiy

 

[CompGee]

Change the CPU Clock Ratio to 'Manual'. Also, raise the CPU Frequency(MhZ) slightly.