OFFICIAL 3900X and 3900XT Overclocking thread - Page 4 - Overclock.net - An Overclocking Community
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OFFICIAL 3900X and 3900XT Overclocking thread

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post #31 of 36 (permalink) Old 06-30-2020, 05:36 AM
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My first time with an AMD CPU in YEARS, but I love the 3900X. I have mine set to all core 43.25 @ 1.264v with 1900 FCLK using GSkill memory. It's stable as I've been using it for the last week and a half now. I was planning to get the 3900XT, but some work related expense arose. :O

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RIG 1: 3900X / X570 Meg ACE / EVGA GTX 1070 FTW / 32GB G Skill Neo 3600 / Corsair MP600 / Dark Base 700 / EVGA 750P2 / SGPC's cables / Dell U3415W Monitor
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post #32 of 36 (permalink) Old 06-30-2020, 02:20 PM
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OK, quick update.

1900 FCLK works fine...and at 1v SOC

1933 didn't boot even at 1.1v SOC and I couldn't be bothered to tweak VDDG etc

Still, 1v SOC at 1900 seems a bit...bizarre?

I've put ram up to 3800 and running TM5 now...

Last edited by SpecChum; 06-30-2020 at 02:24 PM.
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post #33 of 36 (permalink) Old 07-01-2020, 11:44 AM
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Update...

Had some time to play today and even tho TM5 passed and RealBench passed 1hr, I got a single WHEA error, but a slight bump to 1.019v SOC fixed that.

Overall I'm quite happy, going on posts on here and around the net that vSOC is quite low for a stable 1900 FCLK.
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post #34 of 36 (permalink) Old 07-06-2020, 04:37 AM
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System:

Define S, 3 x nf a14 front intake, 1 stock fan rear exhaust. Front panel and filter removed.
Cooler nh d15
Mobo crosshair 6 hero (bios 7803)
3900x

In prime95 at 4,3ghz, 1,275v, 160w (core+soc power) hits 93-94ºC at max fan speed and 25ºC ambient temperature, which would make about 70ºC delta. Is that normal? Isnt that too much? Ik ryzen 3000 thermal density is high, but im seeing GN temps with 198w on 3950x (same exact internal layout like 3900x) sitting at 55ºC delta on a test bench, which is probably worst compared to the "wind tunnel" i have here.
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post #35 of 36 (permalink) Old 07-11-2020, 08:17 AM
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Here's mine. I haven't had an AMD system since the K6-2 days, so tweaking this one was a lot of fun. Getting the last additional 50 MHz on two of the CCX'es increased voltage and temperature (+5 C) maybe a little too much. I'm still comfortable with this setup but may take those two back down a notch.

MB: ASRock Steel Legend X570
Cooler: Noctua NH-D15 (two fans)
Case: Corsair Carbide 275R TG Airflow (three fans)

CPU: 3900X
Batch: 1951SUT
CCX's: 4450 / 4450 / 4300 / 4350
RAM: G.Skill Ripjaws V 3600 CL16
Infinity fabric: 1800
AIDA latency: 69.8 ns

Ambient temp: 25 C
Temp idle: 35 C
Temp typical gaming: 60-65 C
Temp full AVX load: 85 C
Voltage full load: 1.312 (VID 1.35, LLC 1)

Scores:
Cinebench 20: 7904
Geekbench: 1338 / 13793
(https://browser.geekbench.com/v5/cpu/2855589)
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Last edited by csoren; 07-11-2020 at 10:45 AM.
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post #36 of 36 (permalink) Old 07-11-2020, 09:31 PM
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Is this any good?
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*Just Another (JA)FPS*
Shadilay
(28 items)
CPU
Ryzen 9 3900XT CCX OC 4650, 4600, 4450, 4450
Motherboard
MSI X570 ACE
GPU
MSI RTX 2080 SEAHAWK X
RAM
Gskill Trident Z Royal 32GB (4x8) 3800Mhz 14-13-13-28 CR1
Hard Drive
Corsair Force MP600 1TB
Hard Drive
Samsung 970 Evo Plus 1TB
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Intel 660P 2TB
Hard Drive
Samsung 850 Evo 500GB
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Samsung 850 Evo 500GB
Hard Drive
WD Black HDD 4TB
Hard Drive
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Pioneer BDRXS07TUHD External 4K Blu-Ray Writer
Power Supply
Corsair AX1000
Cooling
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Case
Fractal Meshify S2 White
Monitor
Asus ROG PG27V 27'' 1440P 165HZ 1MS
Monitor
AOC 2460G5 24" 1080P
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AOC 2460G5 24'' 1080P
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Keyboard
Logitech G13
Mouse
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Mouse
Corsair Scimitar Pro RGB
Audio
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Audio
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Asus RT-AC86U Wireless Router
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