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tRC should be tRP + tRAS and can probably go down to 40; if it can't your tRP or tRAS are probably too tight. tRDWR and especially tRTP can likely be reduced; tWR should be double tRTP.

SCLs below 4 are infrequently beneficial. A few tests may see improvement, but most will be the same or slightly worse.

Have you tried disabling GDM? This might require adjustment to Rtts.
Thanks for the tips!
Messed around a little bit more, had to increase voltage to 1.55V to get this working.
Did not try the GDM off yet. I hope it won't require more voltage or I have to leave it as it is.

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Hello all,

Currently I have a 3200mhz G skill flare x kit CL14 b die, running at 3800mhz 14-17-14-22 at 1.5v.

You guys think if the F4-3600C14D-16GVKA would be a nice upgrade? Should be, but by how much?

Or the F4-3600C16D-16GTZR, its cheaper and also b die, would it also be an upgrade?
I'm running 2 kits like that with 5900X. You see my timings in the previous comment. I have to run it at 1.55V or it's unstable. But I have 4DIMMS.
I have 2 fan cooler on my RAM though. Under TM5 anta777 Absolut it reaches like 41 - 42 C and in a gaming session it's like 35 C.
 
Do you mind sharing a picture of how it looks with the ram cooler?

My ram is exactly the same as yours but I can't get RCDRD lower than 17.. But also, I have worst settings than you but lower NS.
What latency do you get on Aida? I'm getting 54.9 - 55.0ns.
The cooler is Corsair Dominator Airflow. I only bought it for esthetics to match the rest of the build. You can 3D print a frame and slap on a 120mm fan if you have space for it and don't care too much about the looks and it will perform even better than my cooler.
Building Automotive lighting Light Purple Blue
 
How loud is that RAM cooler fans? I have a RAM cooler from a set or Cosair Dominators from 2009 but it is really loud at speeds that would do any cooling. If I set it to silent it just like having no cooler as the way it clips on to my current RAM it is a half an inch away from the top of the RAM sticks but it was flush to the RAM it was designed for back in 2009.
Well, it has a PWM connector, so I made a custom curve for it. It only spins 100% when CPU is at 65 C and that never happens while gaming, plus I have 3x140mm NOCTUA fans as intake. It's silent on my side. GPU and CPU is water cooled.
 
View attachment 2560719

I get this on 3866mhz but I need airflow on my ram to be stable.
I wish I could go that low on latency. I am not very 5950X smart, but both 5900X and 5950X have 2 CCX. 5900X is 12 core and 5950X is 16 core but it has more L2 cache, how come with worse timings you get so much lower latency. Must be the CPU.
 
I'd say it is his sub timings. I forget which sub timings it was but there are at least one or two sub timings that lower latency if they are low. It's been a while since I messed with timings but when i was messing about I found that out about having a lower latency.
I'm very interested in figuring out which ones are doing this haha


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I get this on 3866mhz but I need airflow on my ram to be stable.

Can you post your ZenTimings chart?
 
luxury stuff corsair dominator Airlow II, unreasonable price. is it come with heat pipe ? why would this stuff so expensive

please leave your ZenTimings here, begging orz
It's absolutely unreasonable, nom heatpipes, also RGB comes with their little BS device, so it's not just 2 connectors, you have this little corsair box too.
I would say if you don't care about the looks that much, just 3D print the frame and slap on some RGB fans on it. It won't look like crap.

It was an impulse buy on my side, just wanted to match the theme.
You will get a better performance with home made cooler.
 
L2 disabled increases performance in everything I tried, not just AIDA.

And if you're the person who said it decreases AIDA performance when you have apps running, I mentioned any benchmark app lowers performance with apps running, so it's not reflective of having L2 cache disabled.

Someone even posted several games running with more FPS in a thread.

Very interesting, what workload or games are we talking about? I have not tried that ever and I'm curious. Does it mess with your OC stability?
 
Here are two examples, enabled and disabled. I do find it often takes longer to boot though, but these examples are huge differences.

65.062s

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64.191s

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Prefetch disabled raises my R23 from 30300 or so to 30974.

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Edit: I don't recall what thread it was that had the games comparison but games like SOTTR, Metro Exodus Remastered and a few other games it was slightly better across the board.
At this point I just have to try it myself
 
Found the post your talking about but my results were about the same as PJVOL´s he might be right that it has sth to do with dual CCD.
ASUS ROG X570 Crosshair VIII Overclocking & Discussion Thread
I gave it a read, it's not very clear how it will behave on my CPU, my board.

Also I didn't really figure how to turn L1, L2 HW prefetchers off. In BIOS I don't have such a thing. I'm on MSI X570 MAG Tomahawk WIFI. Agesa 1.2.0.3c

I can turn off SMT, CCX, Cores, but no prefetchers in settings. Also some NUMA nodes per socket settings.

So I can't really test it. Is there another way to turn it off?
 
I could agree, Auto/PB mode might not give you any advantages in gaming over Manual OC, I just have my doubts 4700mhz OC is affordable for the 5950X.
What would be a good all-core OC for 5900X. I already have a PBO CO profile with memory tweaked to 3800 CL14. Would like to make an OC profile with all-core OC too. Do you have any insights on such? What frequencies / core voltage should I be aiming for?
 
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