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FEATURED G.Skill Trident Z5 32GB DDR5-6400 CL32 - F5-6400J3239G16GX2-TZ5RK

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OP
W

Woomack

Benching Team Leader
Joined
Jan 2, 2005
Some Z690 motherboards can't make more, some can't even make 6400. I'm not sure if anyone here set something higher on the Z690-P. I don't think you will see any difference at a higher clock. 7000+ usually gives that +1% compared to 6200-6400, and even the best Z690 motherboards have problems with that.
 

Profetorum

New Member
Joined
Dec 10, 2022
Hi everyone.
I'm new (VERY new) to ram overclocking, and have no idea about what most of the timings/subtimings do...i'm slowly learning.

I took the XMP profile (6400-32-39-39-102 @ 1.4V), lowered tCL to 30 and tRAS to 48 (arbitrary value to be fair i could optimize it), still at 6400 @1.4V, system agent on auto at 1.275

Any thoughts? I just want to gain some more out of that XMP profile for a chill daily usage - i don't need extreme performances. Both memtest64 and prime95 are stable... can i achieve more at those voltages and/or is it even worth it?
 
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JLK03F150

What have I done! Member
Joined
May 17, 2005
Location
Georgia
:welcome:

Tell us some more information. Please include the RAM brand an model number (is it this G.Skill kit?). Different models have different ICs and they have different characteristics when overclocked.

Also tell us your motherboard make & model as well as CPU make and model. Chipsets can have an impact on overclocking and Intel - AMD CPUs handle RAM overclocks differently too.
 

Profetorum

New Member
Joined
Dec 10, 2022
:welcome:

Tell us some more information. Please include the RAM brand an model number (is it this G.Skill kit?). Different models have different ICs and they have different characteristics when overclocked.

Also tell us your motherboard make & model as well as CPU make and model. Chipsets can have an impact on overclocking and Intel - AMD CPUs handle RAM overclocks differently too.
It's the ram kit mentioned in the main thread here (F5-6400J3239G16GX2-TZ5RK)
Currently on a gigabyte z790 aorus elite ax, 13700k (-100mV adaptive, x54 all pcores, stock ecores)

One weird thing i noticed (but i only tried a couple of times) is that while testing the ram kit with 1T instead of 2T, prime95 runs but i totally lose control of my cpu cooler fans (corsair icue h150). So my cpu thermal throttles (and fans are gone until i reboot), but there are no errors whatsoever testing.
I'm kinda confused - might also be a combination of the undervolt+ram tweakings (??)
 
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OP
W

Woomack

Benching Team Leader
Joined
Jan 2, 2005
If you have good airflow in the case (like at least AIO on top, next to RAM), then you can try 1.45-1.50V. RAM may lose stability at higher temps, starting from ~62-66°C+ (depending on the frequency and some other things), so if it crashes in any test, then check if it wasn't too hot before you start adjusting timings or other things. I don't remember how it was with this G.Skill kit, but V-Color with the same IC runs in my small ITX box at 66-68°C 24/7 for maybe 2 months. It seems too hot, but somehow it works without errors.
Keep hwinfo64 in the background, as it remembers all the sensors and works much better than any motherboard software.

I was checking Gigabyte Z790 AORUS Elite AX with Hynix M-die (like in this G.Skill kit) up to DDR5-7200+, but it wasn't easy to stabilize. I recommend checking something around DDR5-6800 CL32-40-40 lower tRFC, 480-560, tREFI to the max (I don't remember how much this motherboard had). It should work at 1.45-1.50V. If you notice any instability or that RAM is too hot, then try CL34 at a lower voltage.
In this generation, focus on frequency and later play with timings.

On your cooler, 13700K should run at 5.5-5.6GHz on all cores, but the motherboard sets weird voltages, so you have to play with settings to have stable ~1.35V (maybe less, depending on the CPU). At 1.4V+ it will overheat in long CPU stability tests but will probably run fine in games.
The latest BIOS is adding a 6GHz option, and it works fine, but expect it's like default/auto settings with a single-core turbo up to 6GHz, so overall performance is not much different.
 

Profetorum

New Member
Joined
Dec 10, 2022
If you have good airflow in the case (like at least AIO on top, next to RAM), then you can try 1.45-1.50V. RAM may lose stability at higher temps, starting from ~62-66°C+ (depending on the frequency and some other things), so if it crashes in any test, then check if it wasn't too hot before you start adjusting timings or other things. I don't remember how it was with this G.Skill kit, but V-Color with the same IC runs in my small ITX box at 66-68°C 24/7 for maybe 2 months. It seems too hot, but somehow it works without errors.
Keep hwinfo64 in the background, as it remembers all the sensors and works much better than any motherboard software.

I was checking Gigabyte Z790 AORUS Elite AX with Hynix M-die (like in this G.Skill kit) up to DDR5-7200+, but it wasn't easy to stabilize. I recommend checking something around DDR5-6800 CL32-40-40 lower tRFC, 480-560, tREFI to the max (I don't remember how much this motherboard had). It should work at 1.45-1.50V. If you notice any instability or that RAM is too hot, then try CL34 at a lower voltage.
In this generation, focus on frequency and later play with timings.

On your cooler, 13700K should run at 5.5-5.6GHz on all cores, but the motherboard sets weird voltages, so you have to play with settings to have stable ~1.35V (maybe less, depending on the CPU). At 1.4V+ it will overheat in long CPU stability tests but will probably run fine in games.
The latest BIOS is adding a 6GHz option, and it works fine, but expect it's like default/auto settings with a single-core turbo up to 6GHz, so overall performance is not much different.
About the cpu i'm currently at 5.5 all p-cores @ -50mV , stock ecores, and it's stable (for now atleast, stresstests also work so... we'll see on daily usage)

About the ram, the mobo doesn't have an actual max value for the tREFI (you can type an integer up to 999999).
Tried living fREFI stock and put 6800 32-40-40-102 with 480 tRFC @ 1.45V and it's not stable (prime95 bsod) so i guess i'll have to learn and experiment more
 
OP
W

Woomack

Benching Team Leader
Joined
Jan 2, 2005
When you set 999999 then it should automatically drop to ~65k or ~250k, it depends on the motherboard. Higher is better, but sometimes too high causes some stability issues. In most cases, it works at the maximum value.
You can try CL34 or 6600/6666 CL32, or 1.50V.
 

crackinho

New Member
Joined
Dec 19, 2022
Hi, im new with OC. Im reading a lot. I have this memory kit paring with 13600k and a msi pro z690-a.... i want to low latency principally.

With XMP latency seems to high? 71ns, i dont up voltages yet, so is all at stock
 
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