Need assistance with RAM overclocking?

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Party_Time
Junior Member

30

01-08-2022, 10:22 AM

#1

Hello, I just got a 13900KS and am testing the RAM. So far, I've achieved 8400Mhz with a CL38 48 48 48 84 T2 1.5V on both modules. It boots at 8600Mhz but shows BSOD on the login screen. What should I do? Is there something missing to reach 8600Mhz? The RAM is water-cooled internally. It consists of two 24GB units running GSkill TridentZ at 8000Mhz CL40. Also, could the RAM slots themselves be causing problems?

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Elliepls
Member

222

01-12-2022, 07:24 PM

#2

Performance drops as you climb higher with any kind of overclocking. 8600mhz may not be possible for your setup.

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mjt2789
Senior Member

483

01-12-2022, 11:07 PM

#3

Somerandomtechyboi

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ilija
Member

206

01-13-2022, 11:18 PM

#4

Generally, higher bins tend to work better. 8600 could be hard to reach with those settings, which means it's a relatively slow speed.

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xaiden123
Junior Member

26

01-14-2022, 05:34 PM

#5

I acquired it from someone who was running it at 8600MHz. My current RAM performs identically on the CPU with an MC73 board, while my own is 88 MC. The remaining parts to replace are the RAM, CPU, and motherboard.

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4Ok
Junior Member

11

01-14-2022, 06:39 PM

#6

Memory controller SP doesn’t really matter much; it rarely shows a clear link between chip quality and performance. I tested an MC 65 and an MC 85 chip (values weren’t exact, but they were in that range), and both ran smoothly at 8000 on the Unify-X. There are many factors that can stop you from reaching higher speeds—like BIOS issues, voltage settings, or even tiny pressure mismatches in the motherboard. You might have a mediocre controller, outdated firmware, wrong voltages, or slight tolerances in mounting. It’s better to focus on stability first, especially at 8400, because that’s what you’ll learn about your CPU’s preferences, and once it’s steady, higher speeds will follow naturally.

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Lillmust
Member

153

01-15-2022, 03:19 AM

#7

Running a memtest using the ASUS built-in tool, it finished 2 out of 4 tests without any issues. The results show: 8400 38 48 48 48 84 T2.

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tim5436
Member

100

01-15-2022, 07:20 AM

#8

The standard ASUS unit performs poorly in identifying memory issues linked to high-frequency problems. Launch Windows and attempt to execute Y-Cruncher VT3 instead.

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Thumps209LV
Member

226

01-15-2022, 03:09 PM

#9

I don’t have much background on DDR5 or high RAM speeds, but here are some general tips I’ve seen work. When trying to get 8600 to run smoothly, you might want to skip any strict voltage caps unless they’re necessary. The issue isn’t likely with the IMC because VDIMM doesn’t affect it much, and higher voltages don’t seem to cause problems—especially since RAM modules keep improving and don’t scale too much. Running around 2 volts seems to help stability, while pushing too high (like 2.5V) can actually cause issues. The 2x4 stick you have has shown some wear, possibly due to higher voltage attempts.

For voltage limits, just stick to what the manufacturer suggests or matches. If you need more speed, consider equalizing the Vcore to around 1.45 volts max—above that it won’t help much. Running at about 2 volts usually keeps things stable without overheating.

If you’re worried about IMC timing, try loosening a bit and see if it helps. Sometimes adjusting sub-timings or voltages can make a difference. If you’re starting fresh, look for profiles with top frequencies and set your settings to match. You can tweak subs gradually, checking stability before moving on.

In short, don’t stress too much on voltage limits, focus on keeping things within safe ranges, and see what works best for your specific setup.

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Asymble
Junior Member

3

01-19-2022, 01:00 AM

#10

Attempt 7600 and perform a stress test—top 0.1% of CPUs handle 8200 operations without issues on the apex.