Can't overclock past a certain point, is this as far as I can go?

[Coltron5k]

I'll make this quick.



I have a liquid cooled AMD Athlon II 640 x4 3.0Ghz. For the past few months I've had it overclocked to 3.6Ghz. Which is fine, but everytime I go literally any higher I get something like 3 long beeps and it resets the BIOS.

My motherboard is a ga-78lmt-usb3. I also recently upgraded my PSU to a Corsair HX520W.

I also know my CPU isn't anywhere near overheating because it sits idle around 28-30ish degrees ceclius.

So what can I do? Is it my mobo? My CPU? Have I pushed it as far as I can go or is there a setting I don't know about?

Please let me know, I'd love to be able to get a faster stable OC if even possible.
If you need more info on my system just ask and I can provide.

Thanks!

 

[Beezy]

could be the motherboard VRM limit, heat limit, or simply the CPU's limit

 

[bgunner]

The highest stable clock I have gotten with my Athlon II 640 was 3.7 GHz. I run an every day OC on it of 3.5 GHz. You have hit right close to it's max OC. The highest I have read that someone has gotten this chip stable for 24/7 OC is 3.8 GHz. you may be able to squeak a little more out but not by much. If you have gotten it to 3.6 GHz stable you have done good and realize you most likely have hit the highest your equipment will allow it to go.