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12-12-2019 07:29 PM #11ROG Guru: Brown Belt Array gupsterg PC Specs
gupsterg PC Specs Motherboard Asus Maximus VII Ranger Processor i5 4690K Memory (part number) HyperX Savage 2400MHz 16GB Graphics Card #1 Sapphire R9 Fury X (1145/545 Custom ROM) Monitor Asus MG279Q Storage #1 Samsung 840 Evo 250GB Storage #2 HGST 2TB CPU Cooler ThermalRight Archon SB-E X2 Case Silverstone Temjin 06 Power Supply Cooler Master V850 Headset/Speakers HyperX Cloud OS Win 7 Pro x64 / Win 10 Pro x64
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So I now have a R9 3900X as well
and this is a FCLK Clock Edition 
.
Initially I set 3800MHz 1:1:1 (FCLK:UCLK:MEMCLK) on the R9 3900X as I would on the R5 3600.
ProcODT 43.6,
VDIMM 1.35V
VTTDDR 0.675V
SOC 1.062V
CLDO_VDDP 0.927V
CLDO_VDDG 0.980V
This failed Kahru RAM Test 8%
. I bumped ProcODT to 48 and failed Kahru RAM Test 80% 
. Again I bumped ProcODT, went 53 and Kahru RAM Test upto 460% 
and failed at 607% 
.
As the R9 3900X was having a greater load line effect than than the single die R5 3600 & R7 3700X I decided to bump SOC/CLDO_VDDP/CLDO_VDDG a step each and now at ~1313% and counting .
When I targeted 3800MHz on my R5 3600 I found out which slots on my mobo favored which dimms. This held true also for the R7 3700X, ie same dimms favored same slots, it also seems the R9 3900X is the same also.
R9 3900X Kahru RAM Test screenie album, link. I'm using the beta 0002 UEFI with Combo-AM4 1.0.04B.Intel Defector AMD Rebel
TR 1950X - Custom WC - Asus Zenith Extreme Alpha - G.Skill Trident Z 3400MHz C14 QC - RX VEGA 64R5 3600 - Custom WC - Asus Crosshair VII Hero Wifi - G.Skill Ripjaws V 3800MHz C16 - Sapphire HD 5850 Toxic
24/7 OC: i5 4690K @ 4.9GHz CPU@1.255v 4.4GHz Cache@1.10v - Archon SB-E X2 - Asus Maximus VII Ranger
Sapphire Fury X (1145/545 ~17.7K GS 3DM FS)
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