To be honest Phenom X4 II 965+ has a higher single core
I have A CPU that is called a AMD FX 4300 which sits at 3.8GHz I have it paired with a GPU called an MSI GeForce GTX 1050 TI 4GT OC. the motherboard I have is called an m5a78l-M plus/usb3. What is the best way to overclock this cpu it really holds me back on most games
(On A Budget)
With a Stock cooler and that motherbaord, you shouldn't have a problem at all with reaching 4.0ghz "BLCK overclock", IF you have a decent aftermarket cooler "Hyper 212 Evo" you should be able to top out at 4.5ghz @ around 1.375v ore lower again that board will handle it without much of a fuss, if you scared then point a fan at the VRM's directly.
That's one of the many boards I use to own, yeah it's on the weak side for FX chips but it's not "OMG IT"S GONNA !@#% BLOW UP AND BURN DOWN YOUR HOUSE"
Just give it a try and see what you get.
Boot to your BIOS
Go to the advanced tab
Change- CPU overclocking to MANUAL
Change- CPU ratio to x20.00 4000mhz
Change- DISABLED AMD Turbo Core
Save, Boot and test.... 👋