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vrm fixed frequency?

post #1 of 13
Thread Starter 
As the title says what does vrm fixed frequency does? I have 2 options on my bios. VRM spread spectrum which says it should add stability or I could manualy add vrm fixed frequency. Auto or stock i guess is 200, cuz thats what I get when I put it on manual mode, I put the value 250 just to see if it helps with my 4.2ghz overclocking, but dunno. Max is 400 on it, so does anyone know what this is?
post #2 of 13
what motherboard do you have?
what platform cpu/mobo/chipset are you using?
Quote:
Originally Posted by xxmastermindxx View Post

It's purpose is to set the frequency of the VRM's supplying Vcore. Lower frequency gives you lower temps, but a potentially unstable overclock. Higher frequency causes the VRM's to supply Vcore faster during and after load. If you are getting crashes with low frequency, I'd look to board and/or processor as the culprit.
What do the rest of your BIOS settings look like?

Edited by l0max - 11/29/12 at 11:31am
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post #3 of 13
What mobo and CPU?
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post #4 of 13
Thread Starter 
Asus M5A97 PRO
AMD Phenom II X4 965 4.2ghz overclocked
post #5 of 13
VRM fixed frequency is for faster switching VRM, which help with OCing FX and not Phenom II. You can try it but I think it will not help. Mine is set at 300 with my 8320.
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post #6 of 13
Thread Starter 
Quote:
Originally Posted by dixson01974 View Post

VRM fixed frequency is for faster switching VRM, which help with OCing FX and not Phenom II. You can try it but I think it will not help. Mine is set at 300 with my 8320.

It actually helped mine a litle, when I increased just a litle from 200 (stock) to 250, I could lower my voltage a litle and my vcore stays the same all the time it doesnt go up and down, so it does help. I wont increase to much, but Im glad I found this. biggrin.gif What is the max vrm safe VRM ixed fequency?
post #7 of 13
Quote:
Originally Posted by Denebz View Post

It actually helped mine a litle, when I increased just a litle from 200 (stock) to 250, I could lower my voltage a litle and my vcore stays the same all the time it doesnt go up and down, so it does help. I wont increase to much, but Im glad I found this. biggrin.gif What is the max vrm safe VRM ixed fequency?
Nice to know about it helps Phenom II CPUs. The max safe VRM ixed fequency is still know.
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post #8 of 13
Thread Starter 
Quote:
Originally Posted by dixson01974 View Post

Nice to know about it helps Phenom II CPUs. The max safe VRM ixed fequency is still know.

is still know? What does that mean xd Does it mean I can increase more?
post #9 of 13
Quote:
Originally Posted by Denebz View Post

Quote:
Originally Posted by dixson01974 View Post

Nice to know about it helps Phenom II CPUs. The max safe VRM ixed fequency is still know.

is still know? What does that mean xd Does it mean I can increase more?

 

VRM's switch on and off very fast in order to achieve the desired output voltage. A higher frequency means it can switch on and off faster to maintain a stable voltage whatever it's set to. Increasing it will help get a better OC, but can also lead to coil-whine (not a bad thing, just annoying sound to some) and extra heat from the increased switching. I haven't had a chance to look up your motherboard, but most lower end Asus AMD boards are lacking in really good heat sinks on the VRM's. They are good at handling stock settings, but anything more and you must be careful.

As another member said, stick with adding a fan over top of the VRM area if you have any doubts.
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post #10 of 13
Thread Starter 
Quote:
Originally Posted by axipher View Post

VRM's switch on and off very fast in order to achieve the desired output voltage. A higher frequency means it can switch on and off faster to maintain a stable voltage whatever it's set to. Increasing it will help get a better OC, but can also lead to coil-whine (not a bad thing, just annoying sound to some) and extra heat from the increased switching. I haven't had a chance to look up your motherboard, but most lower end Asus AMD boards are lacking in really good heat sinks on the VRM's. They are good at handling stock settings, but anything more and you must be careful.


As another member said, stick with adding a fan over top of the VRM area if you have any doubts.

i have like 5 120mm case fans, so I should have a good airflow, but I only increased just a litle from 200 to 250.

And this is how my mobo looks like, it has some large heatsinks on it.

http://www.mobilx.hu/images/detailed/asus_m5a97_pro_2.jpg
Edited by Denebz - 11/29/12 at 12:13pm
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