Hey all, some funny business is happening with my setup... so I'm hoping someone might know what is going on or point me in the right direction....long story short is I can boot into Windows no problems with the CPU multiplier set to "RatioLimit" and an all core of 30x or slower (CPU is a 11900K on EVGA CLC360)
 
Full story goes like this, I bought a pair of brand new Crucial Ballistix 3600mhz sticks from Newegg, now with PSU off, I fitted them into memory slots 2 and 4, then connected the power, pressed the clear CMOS button (as I do when I do things like this) and booted up the PC, then my steps were as follows;
 
entered UEFI, reset UEFI defaults, rebooted.
entered UEFI again, set XMP Profile 1, rebooted.
entered UEFI once again and set to gear 1, rebooted.
 
Windows then proceeds to lock at the Z590 FTW splash screen with the spinning wheel (remembering now in the UEFI, everything is set to AUTO/Default except for XMP + Gear 1)
 
I have done some tinkering, and found that if i remove auto multiplier, that I can boot into Windows and the memtest UEFI test with a CPU multiplier of 30x or lower; a multi of 35x across all cores causes windows to boot loop, at 40x I get no post, I think I seen it stop on 7F or 68.
 
For the sake of it, I tried tinkering with some settings, like overriding VCORE, I set it to 1.430v to ensure enough voltage was being supplied at 40x,45x,48x multipliers. Also touched VSA, which I set manually to 1.300v and VCCIO_AUX to 1.400v (I remember reading in here that this is controls the IMC and CAN help with memory stability) and lastly the sticks set to 1.45v (up from 1.35 XMP)
 
Would anyone know, is there anything else I could tinker with, or increase, to get windows stable at anything above 3ghz all core?
 
I have no idea what half of those other CPU voltages mean, and their limits, so I don't want to increase the VSA or VCCIO_AUX without knowing what's considered safe (this is even if it is related to them in the first place)
 
Below is a screenshot purely AUTO/STOCK settings except XMP and Gear 1.
 
Eagerly awaiting anyone's input! Thanks all!
 



 
 

I suspect doing that would set it to gear 2?

Nike_7688
While a lot of us can run 3600MHz on gear 1 no problem (a few can run 3733 even), there have been a few that have reported no such luck. There's definitely a memory lottery system and it seems to require that you win 3 times. Your CPU (the IMC anyway), the motherboard, and the memory you pick all have to, for lack of a better term, "like each other". If any of them don't play nice with the others, you'll have problems booting at all or with stability.
 
You can likely boot in gear 2 (or auto) with XMP profile 1, but your latency will suffer a bit. At least it should be stable. Otherwise, you may have to do what Kalsim has done and boot at 3466 with the tightest timings possible in gear 1. You could run some tests and find out which one produces better performance and stability with the games or applications you use and then stick with that. Alternatively, you could try a different brand or model of memory, but that gets expensive unless you can offload the one you have for a good price, but if it is your CPU's IMC holding you back, there's not much a different memory kit is going to do probably.

Cheers for the thorough explanation Nike.
 
Bugger, so even if 3600 gear 1 works at an underclocked 30x multi, doesn't mean there is a way to get it to work at stock clocks?  thought crucial ballistix would of been the way to go to get this to work (prev tried g skill ripjaws which failed) so its either my FTW or the 11900k....

What Nike said.

Isn't the answer there is the dram/fsb ratio? It's a good question.. btw nice you lucky dog

Thanks guys, yep confirmed in CPU-Z that it's running in Gear 1, memory controller and DRAM Freq showing 1866, man what a relief!

All I can say is that some cpus don't like certain timings on ram. I have an 8700k that will do mem at 4400 17-17-17-34, but if I set those same sticks to 4200 with same timing it boot loops at post code 7f. Same boot loops at 4400 if I try to get rtl's closer to the same on both channels. Like channel a is set at 67 but channel b is 70 or 71, I can't remember exactly. It's also very weird with ram at default jedec speeds and trying to set primary timings very loose to see what kind of frequencies the ram can do.
That 8700k will either boot loop or train on first try, no in-between.

yes but for intel, i think that when you have a amd mother board and amd processor, their is no need to unlock anything, there are compatible right out of the box