ASUS ROG Crosshair VII Hero AM4 AMD X470 3466mhz memory issues.

[thejase]

I have this board above in a new system with a ryzen 2700x and g.skill F4-3466C16D-16GTZR ram. With the exception of the last 4 letters of the ram model number (GTZR) the ram is on the compatibility list here. As I understand it, those last 4 letters are more for aesthetics and essentially the ram on the list is the same in the system. I cannot get it to run at 3466mhz. I have tried the docp settings but windows wouldn't boot with that enabled, though it seemed to have set the ram correctly. What is the best way to do this o.c. for the ram to get it to what we need? The new uefi extreme settings are very confusing and I'm afraid to change anything that I don't understand (which is almost all of it). No matter the speeds, it seems to only want to run at the default amd reference of 2133mhz. Anything else and either windows won't start, or the bios freezes and gives me an error, reverting to factory defaults just to boot into bios. I tried setting the cas timings manually but it seems i have extra timings that don't correlate to the packaging and i don't know which numbers go to which menu item. Overall, this is more confusing than I anticipated but I am willing to learn if anyone can explain the confusion. I'd love to know the best-use methods to try first to see if I can get it to work. Thanks in advance for your help, everyone.

 

[Dunlop0078]

Well if I had to guess it's going to be a real pain trying to get that kit to run at 3466mhz on a ryzen system, even X470. Are you running the latest BIOS revision?The latest BIOS will likely help with kit compatibility and stability.

First I would manually set timings. tCL=16, tRCD=18, tRP=18, tRAS=38. I would leave command rate at 2T for now. Then manually set DRAM voltage to 1.35v. Then try to boot at 2133mhz, if it boots try 2400mhz then keep going up until it no longer boots. Then back it down to highest speed that was stable and run some kind of memory stress test like super pi 24m or something and see if it's stable.

 

[Dunlop0078]

DRAM voltage is under the extreme tweaker section. 1.35v. The text will likely turn yellow when you change it, this is fine.

Not whats highlighted in the screenshot. DRAM voltage is below it.

 

[thejase]

DRAM voltage is under the extreme tweaker section. 1.35v. The text will likely turn yellow when you change it, this is fine.

Not whats highlighted in the screenshot. DRAM voltage is below it.

found reply button. lol. so now we have it running at the speed with normal post beeps but windows won't load now. this happened before. any idea why we can get it to post fine bios wise but windows won't load. it gives different errors but one of them is irq not less or equal?

 

[thejase]

Well if I had to guess it's going to be a real pain trying to get that kit to run at 3466mhz on a ryzen system, even X470. Are you running the latest BIOS revision?The latest BIOS will likely help with kit compatibility and stability.

First I would manually set timings. tCL=16, tRCD=18, tRP=18, tRAS=38. I would leave command rate at 2T for now. Then manually set DRAM voltage to 1.35v. Then try to boot at 2133mhz, if it boots try 2400mhz then keep going up until it no longer boots. Then back it down to highest speed that was stable and run some kind of memory stress test like super pi 24m or something and see if it's stable.

This worked but voltage needed 1.4 to be stable. The command rate was set to auto in the end and worked fine that way so we left it alone.