Zen 3 Owners 5xxx Series Memory Discussion

[t4t3r]

Why leave your tRFC untuned? Leaving more performance on the table with it set more than twice as high as it could be.

 

[hihihi8]

Hey yall, crosspost from LTT, but I wanted to post my newest DRAM overclocking specs and results on the 5000 series chips:

CPU: 5950x
Mobo: ROG Crosshair 8 Dark Hero
DRAM Kit: 64GB Quad-stick kit - G.Skill F4-3600C14Q-64GVK (Ripjaws 5) Factory-rated 14-15-15-35 @1.45v
PSU: AX1500i

My results: 3733MHz, 1866FCLK, 14-13-13-33 timings (note that it is actively cooled with a fan, will soon be WC'd)

Full BIOS Settings:

DRAM Freq: 3733MHz
FCLK Freq: 1866MHz
DRAM Voltage: 1.55v
CPU SOC Voltage: 1.2v
Primary DRAM Latencies: 14-13-13-13-33
Trc: 42
TrrdS: 4
TrrdL: 6
Tfaw: 24
TwtrS: 4
TwtrL: 12
Twr: 12
TrdrdScl: 3
TwrwrScl: 3
Trfc: 288Tcwl: 14
Trtp: 8
Cmd2T: 1T
Gear Down Mode: Enabled
Power Down Enable: Disable
CPU Current Capability: 110%
VDDSOC Phase Control: Extreme
DRAM Current Capability: 130%
DRAM Power Phase Control: Extreme
DRAM Switching Freq: 400KHz
PBO: Enabled

 

[Shadowarez]

im lookin and found this kit F4-3600C14Q-32GTRGB but finding one in wild seems like finding a physical kit will be like finding a gpu,cpu,motherboard,

current build
1. Asus Dark Hero x570
2. AMD Ryzen 9 5950 (one day)
3. comparable kit of Ram 32-64gb
4. Evga G5 1000w

 

[celwin]

Would ddr4 3200 @14 latency be better or worst than 3600 @16? I already have the 3200 sticks and not sure it's worth switching them for a higher frequency but higher latency?

 

[tunatime]

Would ddr4 3200 @14 latency be better or worst than 3600 @16? I already have the 3200 sticks and not sure it's worth switching them for a higher frequency but higher latency?

You want the imc to be as fast as you can get it so higher speed is better

 

[Deleted member 143938]

Would ddr4 3200 @14 latency be better or worst than 3600 @16? I already have the 3200 sticks and not sure it's worth switching them for a higher frequency but higher latency?

Best way to find out (if you already have the RAM and aren't talking about shopping between two different sticks) would be to just benchmark yourself. But 3600@16 would definitely be my bet to being better.

I also did some (albeit synthetic - i.e not gaming) benchmarks between CL 14/15/16 at 3600 and barely made any difference. I would say go as high as you can speed-wise on a stable RAM OC (making sure you're matched 1:1 in terms of RAM and FLCK/infinity fiber), and work on getting CAS as low as you can after that. If you can only get 16, that's perfectly fine - anything lower is just a bonus. But focus on speed

 

[Shadowarez]

thank you i also just picked up a kit of 128gb 3600 mhz 4x32gb gskil mem i will try but i dont think my test cpu 3200g will handle that i need get me a 5950x bad. i may have to bite the bullet and spend $1600+