CL16 or CL 18?

etegv

Limp Gawd
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Hi, I have 4x8GB setup for my RAM. This is with the 5800x/Auros B550 Elite.

I did the regular OC and it's at 16-18-18-18-38 @ 3200. I did another OC and it was working at 18-22-22-22-42 @ 3800. 1.4 Volts for both.

Should I go with the CL 16 Timings? Not sure if more heat is being produced with it at 1800. I read that they're pretty close, but which one would you guys go with?

Also, in BIOS I see 16-16-16-39 for CHA and CHB (this is right next to where you can put the RAM timings). I'm not sure what that is about. I think 16-16-16-39 @ 3600 would be the choice, but I am not sure if it can do those timings at 3600.

Thanks
 
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It doesn't hurt to try. I don't think you'd see marked improvement either way. Applications that favor clockspeed will like the 3800 and ones that favor latency will like the CL 16 better. If you can run them both at 3600 C16, then try that. Might need to loosen some subtimings though.
 
It doesn't hurt to try. I don't think you'd see marked improvement either way. Applications that favor clockspeed will like the 3800 and ones that favor latency will like the CL 16 better. If you can run them both at 3600 C16, then try that. Might need to loosen some subtimings though.

What is better for games? Cl 16-18-18-18-38 or 18-22-22-22-42?
I think I am going to keep it at 3200. It seems more stable.

Also, do you know what the CHA/CHB thing is? It shows 16-16-16-39 and I'm curious if I can run the RAM with those timings at 3600 1.35V

thanks
 
Resolution, Benchmarks, Preferred Applications? You are asking a blanket question for so many variables.
What ever isn't stable is an instant cut don't you think?
 
Resolution, Benchmarks, Preferred Applications? You are asking a blanket question for so many variables.
What ever isn't stable is an instant cut don't you think?

1440p resolution for games

I would like to teak things and find that stability (if there is room)
 
You can't talk about CL timings without also specifying the transfer rate, because CL timings are in clock ticks; a clock tick at higher speeds takes less time. This is a mistake that I see reviewers make from time to time, and they really should know better.

CL16 at 3200 MT/s is 10 nanoseconds CAS latency. CL18 at 3800 MT/s is not quite 9.5 ns CAS latency. The latter would be preferable assuming it's stable, which I gather it isn't really. Note that CL18 at 3600 MT/s is also 10 ns CAS latency.

Leaving pedantics aside, it's unlikely that you'll see much actual gaming difference, maybe a percentage point in some games.
 
Command rate...1 or 2? Set it to 1 if not. Thats about all the ram adjustment I do nowadays.
 
Make sure you use AIDA64 to confirms results. There are so many variables to memory, and if you are not touching sub-timings, things could get worse. AIDA64 will give you a snapshot of your bandwidth and latency. For gaming, you almost never want to sacrifice latency for bandwidth (to a certain extent obviously). A 5800X should be able to hold a 1:1:1 3600Mhz CAS16 DDR4 speed with FCLK/UCLK/MEMCLK EZ PZ and that should be your baseline.
 
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Hi, I have 4x8GB setup for my RAM. This is with the 5800x/Auros B550 Elite.

I did the regular OC and it's at 16-18-18-18-38 @ 3200. I did another OC and it was working at 18-22-22-22-42 @ 3800. 1.4 Volts for both.

Should I go with the CL 16 Timings? Not sure if more heat is being produced with it at 1800. I read that they're pretty close, but which one would you guys go with?

Also, in BIOS I see 16-16-16-39 for CHA and CHB (this is right next to where you can put the RAM timings). I'm not sure what that is about. I think 16-16-16-39 @ 3600 would be the choice, but I am not sure if it can do those timings at 3600.

Thanks
sorry for the late jump in.
just to make sure:
1. which one is correct? your ram tuning at 3800 18-22 1.4v or 3600 18-22 1.4v?
2. all four of your ram sticks, what kind of chip they have? identical?
 
sorry for the late jump in.
just to make sure:
1. which one is correct? your ram tuning at 3800 18-22 1.4v or 3600 18-22 1.4v?
2. all four of your ram sticks, what kind of chip they have? identical?


https://www.amazon.com/TEAMGROUP-T-...ocphy=9004354&hvtargid=pla-1189210310345&th=1

https://www.amazon.com/TEAMGROUP-T-Force-Vulcan-3200MHz-Desktop/dp/B07T637L7T?th=1

Right now, I am at 16-18-18-18-38 @ 3200 1.35V with these kits. I have the 8x2GB set for each so 4 sticks for a total of 32GB.

I know the first one was a mistake. I was a newbie and should've done more research. (I may move over to Intel, so I guess they could be of some use.)

I think DDR4 3800 required 1.4V, but one kit (the bottom link) has a voltage listed at 1.35V for 3200. I did run it at 18-22-22-22-42 @ 3800 with 1.4v for a while, but I'm not sure if that was safe. What do you think? Should I try to run both kits at 3800 with 1.4v? Maybe go for 3600?

thanks
 
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https://www.amazon.com/TEAMGROUP-T-...ocphy=9004354&hvtargid=pla-1189210310345&th=1

https://www.amazon.com/TEAMGROUP-T-Force-Vulcan-3200MHz-Desktop/dp/B07T637L7T?th=1

Right now, I am at 16-18-18-18-38 @ 3200 1.35V with these kits. I have the 8x2GB set for each so 4 sticks for a total of 32GB.

I know the first one was a mistake. I was a newbie and should've done more research. (I may move over to Intel, so I guess they could be of some use.)

I think DDR4 3800 required 1.4V, but one kit (the bottom link) has a voltage listed at 1.35V for 3200. I did run it at 18-22-22-22-42 @ 3800 with 1.4v for a while, but I'm not sure if that was safe. What do you think? Should I try to run both kits at 3800 with 1.4v? Maybe go for 3600?

thanks
1.4V is perfectly safe for DDR4. Hell, you could go to 1.45V without worry if your sticks are kept cool enough.
 
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1.4V is perfectly safe for DDR4. Hell, you could go to 1.45V without worry if your sticks are kept cool enough.

ok, thanks. I do have a lot of cooling, but for some reason it went back down to stock settings after trying 18-22-22-22-42 1.4V and 1.45V (1900 IF, 1T, Geardown Mode enabled). Is it unstable? I feel like I am having a harder time getting to 3800 after putting in both kits. I tried both kits separately with those timings at 1.4V/1.5V and they worked at 3800. I am not sure if it's a 1T/2T problem

thanks
 
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https://www.amazon.com/TEAMGROUP-T-...ocphy=9004354&hvtargid=pla-1189210310345&th=1

https://www.amazon.com/TEAMGROUP-T-Force-Vulcan-3200MHz-Desktop/dp/B07T637L7T?th=1

Right now, I am at 16-18-18-18-38 @ 3200 1.35V with these kits. I have the 8x2GB set for each so 4 sticks for a total of 32GB.

I know the first one was a mistake. I was a newbie and should've done more research. (I may move over to Intel, so I guess they could be of some use.)

I think DDR4 3800 required 1.4V, but one kit (the bottom link) has a voltage listed at 1.35V for 3200. I did run it at 18-22-22-22-42 @ 3800 with 1.4v for a while, but I'm not sure if that was safe. What do you think? Should I try to run both kits at 3800 with 1.4v? Maybe go for 3600?

thanks
The 1st link, that ram stick probably has Hynix DJR chip.
The 2nd link, I had that stick back in 2020, Hynix CJR chip.

Both have good frequency to vdimm scaling.
DJR can do 4500++ oc & tuning daily.
CJR max can do 4400++ oc & tuning daily, but with tighter sub-timing compared to DJR on same frequency.


For 4 sticks, you can try to set it to 3600 18-20-20-20 with 1.38v or 3800 18-22-22-22 with 1.42v (add 0.02v to maintain stability).

Edited:
Forgot to add, if you plan to move to Intel, that Hynix DJR kit will be golden.
You can sell the CJR kit if you wish to.
 
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The 1st link, that ram stick probably has Hynix DJR chip.
The 2nd link, I had that stick back in 2020, Hynix CJR chip.

Both have good frequency to vdimm scaling.
DJR can do 4500++ oc & tuning daily.
CJR max can do 4400++ oc & tuning daily, but with tighter sub-timing compared to DJR on same frequency.


For 4 sticks, you can try to set it to 3600 18-20-20-20 with 1.38v or 3800 18-22-22-22 with 1.42v (add 0.02v to maintain stability).

Edited:
Forgot to add, if you plan to move to Intel, that Hynix DJR kit will be golden.
You can sell the CJR kit if you wish to.

A few questions:

should I set a higher value towards the end? like 38? So for instance, 18-20-20-20-38 @ 1.38V
Or would it work better setting it at 42?

also, can I buy another set of the Hynix DJR 8gbx2 kit and have no issues running 32GB on an Intel setup?

Thanks. Really appreciate the help.
 
A few questions:

should I set a higher value towards the end? like 38? So for instance, 18-20-20-20-38 @ 1.38V
Or would it work better setting it at 42?

also, can I buy another set of the Hynix DJR 8gbx2 kit and have no issues running 32GB on an Intel setup?

Thanks. Really appreciate the help.
You should probably read about memory overclocking. Its not just random setting of things. Each timing has a purpose and some need to be larger than others by a specific amount to work properly.
 
You should probably read about memory overclocking. Its not just random setting of things. Each timing has a purpose and some need to be larger than others by a specific amount to work properly.

I did do some research, but I'm going to look for a comprehensive guide this weekend.

Yeah, they def can't be random settings. I picked those numbers because I've seen them on RAM running at 3600/3800 (Ex. 18-22-22-22-42 @ 3800 1.45V). So I'm not sure if I can use 38 or 42 for 18-20-20-20 @ 1.38V (probably not)

thanks
 
I did do some research, but I'm going to look for a comprehensive guide this weekend.

Yeah, they def can't be random settings. I picked those numbers because I've seen them on RAM running at 3600/3800 (Ex. 18-22-22-22-42 @ 3800 1.45V). So I'm not sure if I can use 38 or 42 for 18-20-20-20 @ 1.38V (probably not)

thanks
Quick rule of thumb is that last number should be no lower than the second timing plus the third timing... so 40 in your case.
 
Quick rule of thumb is that last number should be no lower than the second timing plus the third timing... so 40 in your case.

ok, thank you

I just set the timings to 18-20-20-20-40 @ 1.38V and everything booted up fine. I turned on CPUZ and it shows 18-20-20-38

will that be an issue?

thanks
 
ok, thank you

I just set the timings to 18-20-20-20-40 @ 1.38V and everything booted up fine. I turned on CPUZ and it shows 18-20-20-38

will that be an issue?

thanks
that can boot 4 sticks on 3800? if so, you have a good IMC on that procie.

1. regarding the timings, if possible, you can try this:
cas 18
trd 20
twr 8
trp 20
tras 40
trc 60
trfc 500

SoC 1.1v
VDimm 1.4v

2. I will probably choose to run 2 sticks on Intel platform if I want to go for 4500++ freq.
the same can be said on AMD platform. populating 4 sticks will give additional burden on CPU's IMC.
 
Here is a video comparing memory speeds, given the 5600x some 3600Mhz CL 16 makes the 7600x look slow on DDR5.

 
that can boot 4 sticks on 3800? if so, you have a good IMC on that procie.

1. regarding the timings, if possible, you can try this:
cas 18
trd 20
twr 8
trp 20
tras 40
trc 60
trfc 500

SoC 1.1v
VDimm 1.4v

2. I will probably choose to run 2 sticks on Intel platform if I want to go for 4500++ freq.
the same can be said on AMD platform. populating 4 sticks will give additional burden on CPU's IMC.

thank you. I used those timigs and everything worked great. Was able to boot up with no issues.

Would you happen to have to have setting/timings for the DDR4-5000 kit for Intel?

https://www.amazon.com/TEAMGROUP-T-...ocphy=9004354&hvtargid=pla-1189210310345&th=1

I tried them with a friend's 12900k and couldn't get the XMP to work. Also couldn't get 18-20-20-40 to work. Thanks
 
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1. Would you happen to have to have setting/timings for the DDR4-5000 kit for Intel?

2. https://www.amazon.com/TEAMGROUP-T-...ocphy=9004354&hvtargid=pla-1189210310345&th=1

3. I tried them with a friend's 12900k and couldn't get the XMP to work. "Also couldn't get 18-20-20-40 to work". Thanks
1. Unfortunately I haven't run any hynix cjr/djr revision kit on any intel platform, I based my experience using ryzen 3000/4000/5000 which is almost same with running those kits on intel with gear 1 or gear 2 mode.

Anyway that was great to know you can run your kits on 3800/4000 on that timings. that cpu has great IMC!!!

2. I can tell those are hynix djr kit, and I bet it can run at that rated speed (xmp) but of course will need extra effort (IMC binning your processor, and capable mobo / ram slots) haha

3. "Also couldn't get 18-20-20-40 to work" --> at what frequency and gear? 4000mhz gear 2 (1:2 mode)?
 
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Anyway that was great to know you can run your kits on 3800/4000 on that timings. that cpu has great IMC!!!

2. I can tell those are hynix djr kit, and I bet it can run at that rated speed (xmp) but of course will need extra effort (IMC binning your processor, and capable mobo / ram slots) haha

3. "Also couldn't get 18-20-20-40 to work" --> at what frequency and gear? 4000mhz gear 2 (1:2 mode)?

1. I didn't try 3800. I just played it safe and went with 3600, lol. I will try 3800 soon.

2. I tried XMP on his system and wasn't able to boot. This is with a Gigabyte B660 Auros Master DDR4. The RAM is at 18-22-22-42 DDR4-3800 with 1.35V right now, memory ref clock auto, gear mode 1, CMD Rate 1. Intel has settings that I did not see on AMD, for instance I saw settings called Real Time Memory timing, Memory Timing Mode, Memory Enhancement Settings.

3. I tried 18-20-20-40 at 3600 1.35V with gear mode 1, CMD rate 1

thanks
 
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1. I didn't try 3800. I just played it safe and went with 3600, lol. I will try 3800 soon.

2. I tried XMP on his system and wasn't able to boot. This is with a Gigabyte B660 Auros Master DDR4. The RAM is at 18-22-22-42 DDR4-3800 with 1.35V right now, memory ref clock auto, gear mode 1, CMD Rate 1. Intel has settings that I did not see on AMD, for instance I saw settings called Real Time Memory timing, Memory Timing Mode, Memory Enhancement Settings.

3. I tried 18-20-20-40 at 3600 1.35V with gear mode 1, CMD rate 1

thanks
1. ok will wait for your next try. hope it can clock to 3800 with no additional vdimm needed.

AFAIK:
2. usually djr kit is a bit loose on the primary timing at the same speed & same vdimm compared to cjr.
you may try to set the kit to 18-20-20-20 at 3800/4000 with gear mode 2, CR 1, but with vdimm at least 1.4v or 1.42v (it's still a safe voltage for daily).

3. correlated with point 2, 18-20-20-20 is in the "bit tighter" for djr kit and will need vdimm adjustment, for example 1.38 or 1.4v at 3600/3800
 
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