Dabadger84
*casts ressurection on the thread*
 
So I'm lookin' to get my RAM all tuned up... found some settings for what's supposed to be a similar Samsung B-Die CL14 3600MHz 2x16GB kit on Hardware Unboxed video... but their settings don't work for me, they didn't disclose memory voltage or SoC voltage though, so I've been fiddling with that.
 
Here's what my kit runs stock:
 

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The only timings I've manually set are tRAS, tRC, tREF (to 312/320 depending on the speed I'm running) and tFAW to 44.
 
At 3600 I run the stock 1.45V, at 3800 I can run the same timings at 1.5V and it's stable enough to pass basic stability testing.

Dabadger84

degenerate
 
Best place to start is with DRAM Calculator to get a usually solid baseline and then tweak & tune from there. A good source of information: https://github.com/integralfx/MemTestHelper/blob/master/DDR4%20OC%20Guide.md
 
I would aim for 3800mclk/1900fclk, seems to be the most realistic target for Zen3. You can shave another ~3-4ns off your latency that way from your 3600/1800 58.9ns result. Looks like you have B-Die so that should be easily do-able. 4000/2000 seems quite rare but maybe your 5950x is a golden one, tried yet?

I actually haven't tried 4000 RAM / 2000 FCLK yet, but given that my IMC literally won't even let me run 1900 or 1833 on FCLK with 4 sticks installed (and that was with 1.15V SoC & up to 1.6V on the RAM), I'm pretty sure my memory controller is the weak line in my CPU. I'll have to give it a shot & see if it can pass even basic benchmarks at some point.  Not messin' with it tonight though, last night's overclocking/benchmarking session was fun but I'm taking the night off from that stuff.
 
For some reason I don't have info on AIDA64's memory bench with 1900/3800 even though I've tested it pretty extensively with 2 sticks installed.
 
One thing I really want to do is test game-style benchmarks (and actual game benchmarks) with 4 sticks vs 2 & see if there's any difference - if not I'll probably resell the 2nd kit since it makes it impossible to run higher than 1800/3600 with the current AGESA at least.
 
I swear I have a screenshot of 55.6ns somewhere but I cannot find it... it was at 3800 CL14 RAM, 1900 FCLK I believe.  Can't remember if said settings were stable or not though.
 
 

degenerate
 
With Zen3 it's definitely worth just running the 2 dimms @ higher FCLK, significant latency gains from each 100mhz increase there. Latency is king as far as gaming performance is concerned, benching as well. I can boot and run 1933/2000 "stable" but system throws WHEA's... hoping one day with further BIOS improvements I can get it WHEA-free, for now I'm satisfied at 1900fclk error-free.
 
I'm still working on tuning but I've managed 54.8ns so far. With that kit you have, you should at least be able to match that (3800 CL14 @ 1.49V-1.5V). I think in order to get close to 50ns you need a 5800x or 5600x part.
 
I saw your recent 15.6k PR score brother, great work I know how stoked you must be, well deserved!

CptT95
Is it feasible to run 3800 14 14 14 28 at 1.5v on Gskill b-die 3200 cl14 memory?
Edit-I have 5800x on Asus CH8 Formula btw

LAlcaraz
Currently testing this... I know this kit can do 4000mhz 16-18-18-36, but this new 5900x won't boot at 2000flck, so I'm now tightening timings at 3800. Micron Rev.B is pretty damn impressive, and cheap compared to B-Die.