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Need a little help with my 12700k, MOBO, and RAM

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TickleMyElmo

Member
Joined
Apr 16, 2011
Location
Missouri
Ok yall, it seems that I'm having a few issues with this cpu, RAM and or MOBO. First off, I'm currently using 2x8gb Corsair Vengeance RBG Pro sticks at 3600 c16-19-19-19 that I'm trying to get to c16-16-16-16 or atleast c16-18-18-18. I've always used XMP so I really don't know how to manually overclock RAM. Does the overclocking DDR4 RAM guide on the forums still apply to 12th gen MOBO's and cpu's? Secondly, I have my 12700k ratio set to 51 basically (see photos) but it tops out at 5113.6MHz, I think due to BCLK but I set the BCLK to 100. ? And thirdly, HWMonitor is showing 5089 when I had my cpu set to a 54 ratio. (not pictured)
I had to scale back due to temps but like I said at a 51 ratio is showing 5089MHz, is that normal and if so why is showing 5113.6MHz on Core Temp? Thanks again guys.
 

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Woomack

Benching Team Leader
Joined
Jan 2, 2005
It looks like Hynix IC and if it's really Hynix (or Micron) then I would go higher with the clock as it won't run at 16-16-16. Check if CPU-Z is showing memory IC manufacturer (SPD tab), or something like AIDA64 or Thaiphoon Burner. Probably BIOS in SPD/XMP profile tab will show it too.
The easy way is to set the memory clock manually - change DRAM frequency to manual and pick whatever you want from the list. Next, go to Advanced DRAM Configuration and change everything in the main timings section to manual (current settings should be next to it greyed-out). After that set the memory voltage to 1.45V (when you stabilize any higher clock then can set it lower, the safe will be still above 1.5V).
 

EarthDog

Gulper Nozzle Co-Owner
Joined
Dec 15, 2008
Location
Buckeyes!
Does the overclocking DDR4 RAM guide on the forums still apply to 12th gen MOBO's and cpu's?
High level concepts, yes.


Secondly, I have my 12700k ratio set to 51 basically (see photos) but it tops out at 5113.6MHz, I think due to BCLK but I set the BCLK to 100. ?
Why did you set it static first of all? Second, that's normal to see some fluctuation. Spread spectrum is why it does that.


It's Micron. Is Micron bad? Should I return it? I know nothing about RAM. I'm here to learn.
It's not bad. If you wanted 16-16-16-xx, i wouldve bought sticks labeled as such. But you're really not going to get much out of the changes in the first place.

Like woo said, try to increase speed because you probably can't do it on those sticks.
 

Woomack

Benching Team Leader
Joined
Jan 2, 2005
Micron won't run at very tight timings but to make it run like that you need some additional knowledge. Only Samsung will run at 3600 CL16-16-16 or lower. Micron generally runs at 16-18-18 or 16-19-19 1.35-1.45V. On the other hand, Micron is usually easier to set at a higher clock. For the best performance, you want to stick with Gear 1 mode or set something like 4600 at Gear 2.
- Gear 1 works up to 4000, but on some motherboards, the max can be around 3800. Typical settings at 3800-4000 for Micron will be 16-19-19 or 18-19-19 1.40-1.45V.
- Gear 2 works automatically on most motherboards when you set a 4000+ memory clock. For Micron you can try 18-21-21 or 18-22-22 1.45-1.50V up to 4400 or 18-24-24 1.50-1.55V at 4600+. If you can't make it work at 4400+ then back to the Gear 1 setting.
 
OP
TickleMyElmo

TickleMyElmo

Member
Joined
Apr 16, 2011
Location
Missouri
I was more worried about the timings. Does c16 -19-19-19 really matter compared to c18-21-21-21?
I just love playing with my pc, I get bored quick.
 

Woomack

Benching Team Leader
Joined
Jan 2, 2005
Really it barely matters ... like 1% performance difference in most tasks, but well, probably no one is excited about CL18 (at least below 5000).