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Crosshair VI hero max mem clock?

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Hi there.

Are there AM4 RAM clockers who are willing to share max memory clock achieved on this mobo ?

some days ago 1.0.0.6 agesa bios came out ( again ? ) and I managed to get 3733 c14 aida64 memory benchmark " stable " on air with a random 2700x and gskill bdie.

but above that nothing even boots. 3800 or 3866 no go.

is that the limit of this board or just cpu ? 

3733 was fairly easy with 1.18 soc and 53.3 procODT with 0.8 dram vref but I struggle to go into windows above this.

with an r7 1700 cpu it was 3667 c14 maximum so we could say I should try to find a better chip.

Or is this the air limit of the ryzen imc

Or this is the limit of the board because of T topology used?

 

thanks for any input.

 

 

91661_3733_c14.jpg

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I've reached 3850 C12 with 1800X and early bioses without additional dividers. It's either IMC or your timings, however I haven't played with newer bioses, since my board died long time ago. I think 11-11-11 was also possible, can't find screens.

 

 

421c6464_cachemem_3845_C12.png

Edited by I.nfraR.ed
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Thanks!

I think I will try to raise bclk with 37.33 divider and see how it goes.maybe 38xx multis are not working

I don't feel its the end of imc as 3733 only needs 1.18v soc to be aida stable. r7 1700 needed 1.32v for 3667

 

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I've found it a bit board specific TBH. One of my C6H's was fine to do 3733C14/3611C11-10, the other I have here struggles on air to do 3600 at any CAS level.

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That is true, but Crosshair VII Hero is just stronger on memory like how Maximus IX Apex vs Maximus VIII Impact was, im done binning Crosshair VI Hero too. Just FYI, on AMD Rock Tour Competition here someone doing 4000 memory clock just on air which is almost impossible doing that on air on Crosshair VI Hero, even under cold (controlled cpu temp) i only can boot 3866 and with turbo vcore adjust it to 4000 on os with Crosshair VI Hero.

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Thanks for the input mate!

Im feeling board limit too, there is so sudden stop after 3733,no scaling at all with previously working methods.

I will try to raise bclk with 37.33 multi and see how far it goes.

 

 

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I got something as 3866 MHz on C7H and daily cooling. Im sure, everything will be depends on IMC quality of CPU and board. There could be different around 300 MHz between chips in IMC

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thanks but I mainly focus on cr6h info as I have this board not the c7h one. but its good to know that its better on RAM.

 

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9 hours ago, Bullant said:

This platform allow you to adjust memory sub timings? Like this board or the gigabyte 5-7 boards ? 

Yes this platform allowing you to adjust subtiming, and with b die a1 pcb no slow POST on my case.

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On 12/31/2018 at 11:46 PM, Bullant said:

This platform allow you to adjust memory sub timings? Like this board or the gigabyte 5-7 boards ? 

yes mate, you can go into 3rd timings no problem.

b-die slow boot is not present neither in my case.

bought a set of 3200 c15 bdie will try out these during the week

 

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Thanks guys, from early post around I did think subs were locked, is nice to know it's all unlocked. I'll try this platform when I find some cheap secondhand gear locally

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1 hour ago, Bullant said:

Thanks guys, from early post around I did think subs were locked, is nice to know it's all unlocked. I'll try this platform when I find some cheap secondhand gear locally

Yeah, the early AMD agesa was limited to the primary timings and affected all boards. 

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