DDR5 Corsair Vengence 5600mhz C40 better timings?

[bobbylew89]

I currently have Corsair Vengence 5600mhz kit (2 x32 gb = 64gb total) C40 40-40-40-117 , i was just able to put it to 6000mhz at those same timings, but im new to this overclocking with RAM. Could anybody give me advice or anything on possibly doing lower timings for this speed or even at the speed of 5600, or 5800mhz with tighter timings

 

[bobbylew89]

@Woomack @JLK03F150. I have up the voltage and was able to hit 6000 but the timings were loose. I'll get the exact numbers for you but I figured if I cannot get the timings down on 6000mhz then I could try to tighten the timings on the 56000mhz I am on at the moment. What do you think?

 

[Woomack]

It would be good to know what IC has your memory kit. Run at least CPU-Z and check if the SPD tab says anything about it. You can also post a screenshot here. ZenTimings may suggest something, but won't tell you the IC.
You can also check memory tab in BIOS. If I'm right then info about IC should be somewhere on the XMP/EXPO profiles tab.

 

[bobbylew89]

Okay I will post the cpuz in 4 minutes for you

 

[bobbylew89]

here you go @Woomack

Post magically merged: Jan 25, 2025

here's hwinfo64 information of my ram as well

 

[Woomack]

Since it's Micron from 2023 then you can't do much. I found some results from my older tests and I could make about 6200-6400 CL32-44-44 1.35-1.40V. It's typically not scaling well above 1.40V. You can also try 34-42-42 or 36-44-44. Sub-timings won't run much better than at auto/XMP/EXPO.
There is info that PMIC isn't unlocked, so probably it won't work at more than 1.10-1.25V. Generally it affects CL and max frequency, so if you won't make it run at CL32 or 6200+, then try CL40-44-44.

 

[bobbylew89]

So im new to this @Woomack lol so bare with me So can you tell me exactly which voltages to change to 1.40 or what not, and which voltage your talking about containing the 1.10-1.25v and a idea of what PMIC is and what it means that it isn't unlocked, and if i can't make it to 6000 or the 6200 or 6400 what timings exactly should i set 5600mhz at, i see you said the ones you mentioned so would that be 32-44-44-77? or 34-42-42-77 or 36-44-44-77? just work with me im new to this. PMIC i think that's the option where i can sync them all or leave it auto as far as in my bios i believe

 

[Woomack]

VDD and VDDQ are memory voltages for DDR5. I'm talking only about these 2. Both should be equal at these lower voltages, so when VDD is 1.25V then VDDQ should be 1.25V too (just noticed your memory already runs at 1.25V). Standard voltages for DDR5 are 1.10V. If PMIC is unlocked then you can set it much higher. If PMIC is locked or not supported by the motherboard, you can't set more than 1.10V or sometimes up to 1.25V. PMIC is a power management chip that every DDR5 has.

The 4th timing (so 77 in your case) doesn't matter much at lower frequencies. You can set it at 84 or 90 just to be sure it won't cause issues.

 

[bobbylew89]

Ok so which settings and timings do you think i should try in your opinion?

Post magically merged: Jan 25, 2025

i have DOCP 1 enabled that's why its at 1.25 but i am able to change the voltage for all that i believe, so which options do you think or option do you think i should try and go with, i am a competitive Counter-Strike 2 player, im just trying to get performance were i can, eventually i will buy better ram but while im stuck with what im stuck with i'd like to try to get what i can get outta it you know @Woomack

 

[bobbylew89]

i am able to change the voltages as well

 

[Woomack]

You can, but does it work? Check if hwinfo64 shows more than 1.25V, as the BIOS always lets you set more.
On the other hand, you won't get much from this kit. A higher clock means worse timings, which for Micron IC is +/- the same FPS.
I won't help you much more as these kits are almost not overclocking.

 

[bobbylew89]

so even if i keep it at the 5600mhz it wouldn't help to lower the timings to gain some performance? @Woomack i appreciate your time and information by the way

 

[Woomack]

You can try setting it at 6000, as it's generally optimal for Ryzen. Then try something like 38-42-42-84 1.35V. If you make it work, then fine. If not, then just keep 5600.

 

[bobbylew89]

Okay @Woomack sorry for a late reply to all this, so I just went into bios and loaded optimized settings, then set the two volts we talked about to 1.40 and disabled pwr down enable and memory restore context and set uclk div1 mode to uclk=memclk and it restarted and loaded into windows. So now I'm going to try setting the timings you've suggested. If there's any last words you could give me I'd really appreciate it. Already appreciate your help from the start

 

[Woomack]

Check in the hwinfo64 if it really runs at 1.40V
Set main timings - one of those I told you before or something mixed (lower or higher CL)
Run some stability tests. Bootable memtest86 is fine, but it takes a lot of time. There are some options for Windows, like even the 7Zip benchmark set to high RAM usage (~90% at least). The option is on one of the tabs. Can try Prime95, AIDA64, HCI, Y-Cruncher ... the list is long.

 

[bobbylew89]

@Woomack

 

[Woomack]

Check if it works stable, and it will be all. You can try CL36 or CL34, but I doubt you will see the difference.

 

[bobbylew89]

@Woomack it was stable after doing multiple test these are the timings they're stable at, haven't done the other ones yet but i will try

Post magically merged: Jan 27, 2025

i should try for 34-42-42-84 or or 32-42-42-77 ?

 

[Woomack]

You won't know if it works until you try one of them.