FCLK overclocking

[opethdisciple]

This bothers me and I have not managed to get a straight answer.

When you find out what your max FCLK is, do you change any voltages or do you just up the FCLK frequency and then apply the ram speed and see how it goes?

My 3700x for example if I set the FCLK to 1900MHz leaving ram at 2133MHz (basically untouched) the PC will happily operate like this.

I only see problems when I add the ram at 3800MHz to the equation.

I get audio corruption etc...

So do I have to apply any voltages to get the FCLK to work with my ram at 3800MHz or is it just a case that this wont work for me.

Last time I played with it I believe it took around 1.2v SOC to get rid of the audio corruption.

But 1.2v is too high for PCIe 4 devices from what I understand.

 

[opethdisciple]

Yea at the moment I have 3600MHz at CL14 speeds so it's as good as 3600MHz can get.

I was just wondering if some of you running 1900 on the FCLK where actually applying n voltages to get there or if you just set it along with the ram speed with out any tweaks.

It sounds like if it will work it will work without any tweaks to voltages etc.

 

[opethdisciple]

This is how I test FCLK.

1) Set the following volts.

SOC 1.25
IOD 1.2
CCD .95
RAM 1.4 ( I have bdie)

Slowly up your IF clock till you reach the speed you want, for 3000 stop at 1900, for 5000 keep going till you fail to post.

Once max IF is met, reduce SOC and IOD together in 25mv increments untill you fail to post. Then +25mv.

Now bring the ram up to the correct speed, set very lose timings. You may need to increase SOC and IOD to bring stability, they should stay with 50mv of each other as per my readings but my chip likes that to be 30mv.

Once the RAM is at the speed you want now work on timings and from my experience, ram v will bring stability here.

SOC 1.25v? Isnt that a bit high? Unless this is 5000 series specific?

I thought anything over 1.2v was bad for PCIe4 devices?