Memory advice

[silk186]

 

I can't get this ram to run stable, even at 6000 cl40. I'm thinking to give up and replace it. What 64gb kit should I get?

 

The system specs are in my signature, and I will install a custom water loop this week.

 

 

[Dedayog]

46 minutes ago, silk186 said:

 

I can't get this ram to run stable, even at 6000 cl40. I'm thinking to give up and replace it. What 64gb kit should I get?

 

The system specs are in my signature, and I will install a custom water loop this week.

 

 

I'd just get G. Skill 6000CL30 and be done.  UNless you need white with RGB?

[RONOTHAN##]

42 minutes ago, silk186 said:

I can't get this ram to run stable, even at 6000 cl40. I'm thinking to give up and replace it.

What have you done to try and get it stable? 

 

If it does come down to replacing it (I don't necessarily think it will), where are you shopping for it? There are a ton of similarly fine options, so you pretty much need to judge based off price and availability, not looking for a very specific model number. 

[y0ur5h4d0w]

4 hours ago, silk186 said:

 

I can't get this ram to run stable, even at 6000 cl40. I'm thinking to give up and replace it. What 64gb kit should I get?

 

The system specs are in my signature, and I will install a custom water loop this week.

 

 

 

these are the only 6800 supported RAM from corsair for your motherboard, as you can see from the list your motherboard doesn't support 6800/C32 RAM so your case is an expected behaviour, RMA your RAM and buy a compatible kit, or simply go for 64g 6000 CL30, you will NEVER be able to make these 6800/C32 work on that motherboard, they will work probably at stock speed 

[leclod]

55 minutes ago, y0ur5h4d0w said:

You will NEVER be able to make these 6800/C32 work on that motherboard

But they should work at 6000/C32, no ?

[y0ur5h4d0w]

5 minutes ago, leclod said:

But they should work at 6000/C32, no ?

i don't think so, those RAM sticks have sub timings that needs to be in between a certain range and it would be hell to find them since those RAM sticks are NOT tested, it's a waste of time.

 

when i had non compatible RAMs i could make them run at 6000/C30 but the subtimings were NOT supported which was 30-36-36-36 or something similiar, my ram were correctly detected but randomly i would experience full system freeze and i had to shutdown my PC then at the restart 1 of the 2 sticks were considered "unknown" from bios so i was running with 50% of the RAM, it was a nightmare, then i bought the same exact RAM but with slightly slower timings 30-40-40-40 or something similiar (which WAS in the compatibility list for my motherboard) and now my system is fully stable.

 

i wouldn't try to underclock or overclock RAM sticks on AM5 honestly, if it's not in the compatibility list the system will be unstable and it's painful to troubleshoot, plus 6800/cl32 RAM sticks costs a buttload of cash, if they can't run at that speed it's wasted cash

[leclod]

7 minutes ago, y0ur5h4d0w said:

i don't think so, those RAM sticks have sub timings that needs to be in between a certain range and it would be hell to find them since those RAM sticks are NOT tested, it's a waste of time.

I'm still with DDR4, so I might be wrong,

But when my 3600CL16 Ram failed to function I just reduced the frequency from 3600 to 3500 keeping everything else.

So I'd try enabling Expo and reducing only the frequency to 6000.

Edited August 25, 2025 by leclod

[y0ur5h4d0w]

4 minutes ago, leclod said:

I'm still with DDR4, so I might be wrong,

But when my 3600CL16 Ram failed to function I just reduced the frequency from 3600 to 3500 keeping everything else.

yes it was like that on DDR4, but DDR5 and AMD systems are more prone to system instability specially at higher speeds, 6000/cl30 is the sweetspot for stability and speed

 

i've tinkered a lot on DDR4 but DDR5 is really really sensitive from what i've experienced, plus on the costs side, having ram rated to be really fast which costs A LOT and not having them working due to compatibility is not worth the tinkering and having them slowed down

 

those RAM which are not working costs around 400$ (converting the € cost for me in italy to $) which is an INSANE amount of cash

the 6000/cl30 in comparison costs 329$ (converting the € cost for me in italy to $) and it's most likely that's working out of the box

[RONOTHAN##]

25 minutes ago, y0ur5h4d0w said:

i don't think so, those RAM sticks have sub timings that needs to be in between a certain range and it would be hell to find them since those RAM sticks are NOT tested, it's a waste of time.

...

I don't think you know what you're talking about. 

 

Yes, there are subtimings for a given set of sticks, but a) these are almost entirely dependent on the memory IC used, b) looser versions of these would work, so just dropping the clock speed would if anything make them more stable, and c) the motherboard handles this unless you otherwise specify, and it's usually pretty good at figuring these out. These sticks are Hynix A die based, and use the same PCB that basically every other RGB Corsair kit uses, so compatibilty in that regard should be fine. The XMP profile almost certainly won't work (hence why this isn't on the QVL), but the kit will boot, and aside from binning differences will be no different from any other 6000 CL30-36-36 kit from Corsair. Yeah, these ones specifically might not be tested, but an equivalent at a lower clock speed almost certainly was, so these should work once you drop down the frequency (assuming only 2 sticks in the correct slots and the BIOS isn't completely screwed up). 

 

 

Yeah, I agree that buying these sticks was a dumb move because there's no way in hell you'll get it working at the right speed and they cost an arm and a leg, though it given that it sounds like they've had them for a while they're probably outside of the return window, and in my experience these ultra high end kits don't exactly have very good resale prices, so unless you want to burn ~$150 buying a new kit, you should actually get these to work. 

[y0ur5h4d0w]

2 minutes ago, RONOTHAN## said:

I don't think you know what you're talking about. 

 

i don't in fact have much knowledge and thank you for the full explanation, i have only the really basics understanding due to my experience.

 

i assume those might work at lower speeds don't know how easly it is to try and get the right speeds to make them work though, however IF as you said it's an old kit and out of return window then the only way is to sit down with some patience in the pockets and find the right speed and timings for a stable systems (i hope it's not the case honestly and OP is still in time for a return)

[RONOTHAN##]

9 minutes ago, y0ur5h4d0w said:

i don't in fact have much knowledge and thank you for the full explanation, i have only the really basics understanding due to my experience.

 

i assume those might work at lower speeds don't know how easly it is to try and get the right speeds to make them work though, however IF as you said it's an old kit and out of return window then the only way is to sit down with some patience in the pockets and find the right speed and timings for a stable systems (i hope it's not the case honestly and OP is still in time for a return)

Eh, it happens, no hard feelings. If it wasn't obvious, I kinda do a lot of memory tuning (and I mean a lot), so when it comes to messing with timings and stuff to get it working I'm usually pretty good at figuring it out. Usually. 

 

Yeah, if they're in the return window it would be a good idea to do that. That said, if they're not, getting some settings to dial in shouldn't be that hard if you do some math and/or just leave the primary timings at stock values and let the motherboard figure out the subtimings. If that's not working, I'd start by changing out the BIOS revision instead, as that plays a major role in memory compatibility and motherboard manufacturers every once in a while royally screw it up in one way or another. 

 

Unrelated, I noticed rereading your post that you seemed to indicate that tRCD and tRP (2nd and 3rd timings in the timing string respectively) were subtimings, they are not. They still count as primary timings and are largely dependent on the memory kit. Subtimings are things like tWR, tRFC, tRRD, etc., and while they are controlled by the EXPO/XMP profiles and can vary quite a bit from kit to kit for what they're capable of when doing manual tuning, I've yet to even hear of a kit on DDR5 (DDR4 is another story) that used values that weren't just scaled JEDEC (I.E. the timngs that every memory kit is required to be able to operate at for a given frequency), so they aren't really going to be a factor here. 

[silk186]

21 hours ago, Dedayog said:

I'd just get G. Skill 6000CL30 and be done.  UNless you need white with RGB?

I was thinking about getting a pair of G.Skill Trident Z5 Royal Neo RGB 64 GB but is 6000 cl28/30 still the sweat spot for AMD?

 

21 hours ago, RONOTHAN## said:

What have you done to try and get it stable? 

 

If it does come down to replacing it (I don't necessarily think it will), where are you shopping for it? There are a ton of similarly fine options, so you pretty much need to judge based off price and availability, not looking for a very specific model number. 

I tried changing the speed and timing on the RAM, and it would crash even when i tried 6000 cl40.

I will buy from Taobao, so if it doesn't work with EXPO timings, i can send it back.

18 hours ago, y0ur5h4d0w said:

 

these are the only 6800 supported RAM from corsair for your motherboard, as you can see from the list your motherboard doesn't support 6800/C32 RAM so your case is an expected behaviour, RMA your RAM and buy a compatible kit, or simply go for 64g 6000 CL30, you will NEVER be able to make these 6800/C32 work on that motherboard, they will work probably at stock speed 

Yah, i'm not surprised i'm not getting 6800 cl32, but i was expecting to be able to run 6000 cl32.

 

 

Ok, I will stick to something on the compatibility list and try again.

[RONOTHAN##]

8 minutes ago, silk186 said:

I tried changing the speed and timing on the RAM, and it would crash even when i tried 6000 cl40.

I will buy from Taobao, so if it doesn't work with EXPO timings, i can send it back.

were you adjusting the voltage at the same time? That could be the issue. If not, I'd be more suspicious of a motherboard issue, have you tried other BIOS revisions?

[silk186]

 

 

I didn't like this list, as I can't see what they look like. So ... I checked if G.SKills has its own compatibility checker, and they have a nice one, but the model numbers don't overlap.

[Dedayog]

27 minutes ago, silk186 said:

 

 

I didn't like this list, as I can't see what they look like. So ... I checked if G.SKills has its own compatibility checker, and they have a nice one, but the model numbers don't overlap.

It's g skill.  All their ram is good stuff, in the 6000cl30 or 28.

 

Get whatever looks good to you.

 

I'd buy g. Skill all day without thinking twice.

[freeagent]

I have a pair of Royals in my other rig.. love em. Just running Trident Z in this rig.. also love em 

[y0ur5h4d0w]

5 hours ago, silk186 said:

 

 

I didn't like this list, as I can't see what they look like. So ... I checked if G.SKills has its own compatibility checker, and they have a nice one, but the model numbers don't overlap.

you have to stick with what the manufacturer of your board has tested to be 100% sure they work, simply copy the Model P/N into google if you want to check how they look.

 

and btw... none of the 3 you listed below are in the compatibility list.... you need a 30-40 and not 30-36