[SOLVED] Bad VRM on an Asus mobo?

[rscheetah30]

I have an old Asus MB and I am having trouble overclocking over 4.0Ghz, whenever I go over this limit, the pc starts to misbehave. Is this due to its VRM?

My rig:

FX 6300
R7 240 2GB
8GB DDR3 ram
MB: M5A78L-M LX V2
PSU: Gamemax GP650 650W

 

[XxDarkMario20xX]

The max Up to 3.8GHz on that CPU and trying to overclock it more kinda lottory and maybe your CPU can not handle 4ghz could be overheating just set the speed to max 3.8GHZ motherboard is not bad or VRM just CPU might not be able to handle that overclock!

 

[rscheetah30]

The max Up to 3.8GHz on that CPU and trying to overclock it more kinda lottory and maybe your CPU can not handle 4ghz could be overheating just set the speed to max!

My cooler is an excellent Cooler Master, my cpu temps rarely exceed 70ºC in use. At idle it runs at around 50ºC.

 

[drea.drechsler]

My cooler is an excellent Cooler Master, my cpu temps rarely exceed 70ºC in use. At idle it runs at around 50ºC.

Define misbehave...

The reason your CPU never gets very hot is the processor is still trying to maintain its 95W TDP even when overclocked. So it will throttle itself periodically when clocks get above 4Ghz under heavy loads. But even if you can disable (BIOS support is required to do it) the VRM will throttle the CPU if it overheats to keep from burning up.

So this is possibly what you're seeing if the misbehaving is frequent throttles of clock frequency to 1.4Ghz or lower when processing a heavy load OC'd above 4Ghz.

 

[rscheetah30]

Define misbehave...

By misbehaving, I mean for example that my WIfi signal keeps cutting off, also the pc starts to turn off by itself.

 

[XxDarkMario20xX]

My cooler is an excellent Cooler Master, my cpu temps rarely exceed 70ºC in use. At idle it runs at around 50ºC.

Probl

By misbehaving, I mean for example that my WIfi signal keeps cutting off, also the pc starts to turn off by itself.

Yeah pc switch off could mean overheating and its turning off to protect itself

 

[drea.drechsler]

By misbehaving, I mean for example that my WIfi signal keeps cutting off, also the pc starts to turn off by itself.

Well that's peculiar...

Perhaps a wild guess but possibly PSU making voltage unstable for WiFi circuit. 650W may sound adequate, but if it's a sketch C-grade PSU you can't count on that. Especially if an old one.

 

[rscheetah30]

Well that's peculiar...

Perhaps a wild guess but possibly PSU making voltage unstable for WiFi circuit.

My psu is a Gamemax GP650 650W

 

[drea.drechsler]

My psu is a Gamemax GP650 650W

650W may sound adequate, but if it's a sketch C-grade PSU you can't count on that. Especially if an old one.

 

[rscheetah30]

650W may sound adequate, but if it's a sketch C-grade PSU you can't count on that. Especially if an old one.

I bought this one about a year ago

 

[drea.drechsler]

I bought this one about a year ago

Well..it's your choice but it's about as low-endy as they come and the problem is typical. Low-grade components used in low end parts age rapidly, and by old I really mean old split-rail design where a fraction of total power is available to the CPU or GPU.

 

[XxDarkMario20xX]

I bought this one about a year ago

Just checked the price thats really cheap PSU very low and if it breaks could take all your parts with it!

 

[rscheetah30]

Well..it's your choice but it's about as low-endy as they come.

Well, before this psu I had a 500W generic one and I couldn't get near 4.0 without collateral effects such as my wifi signal cutting off randomly. With the Gamemax 650 I can keep my cpu at 4.0Ghz without any issue.

 

[drea.drechsler]

Well, before this psu I had a 500W generic one and I couldn't get near 4.0 without collateral effects such as my wifi signal cutting off randomly. With the Gamemax 650 I can keep my cpu at 4.0Ghz without any issue.

LOL...the same problem suggests you know what you need to do! I seriously believe getting a better PSU for it will help. A good quality modern design 500 or 550 W, possibly even 450W, would do it just fine and hold stable voltage...but it will cost more. I'd suggest something like Corsair CM550x.