PLL PLL termination voltage

Asryan · Aug 10, 2019

Hi

In order to tweak my OC a bit I wondered if it was useful to "fix" the parameter PLL termination voltage, I read on some that it could prevent the particular heating.

On an ASUS motherboard with an 8086k processor what value should I put, I had read 1.15 but I would like your opinion, thank you

Enterprise24 · Aug 26, 2019

If you mean temperature reduce it should be PLL bandwidth (select level) not PLL termination voltage. That is equal to VCCPLL on ASRock.
Level 3 equals 1.0v, level 4 equals 1.15 and higher like level 6 is in the neighborhood of 1.4

I play with VCCPLL since i5-6500 @ 5Ghz + ASRock Z170 OC Formula till 9900K + Z370 Taichi and can confirm that temp reduce by reducing this voltage.
Temp doesn't reduce alone. Current and power also reduce so I think it is true.
ASRock can set this voltage 1.1V minimum. Default is 1.2V on Z370 Taichi and 1.3V on Z170 OC Formula which cause massive temperature increase compared to my previous ASUS Z170-A and MSI Z170 Gaming Pro Carbon. All of my CPU can use 1.1V without problem but my 9900K require 1.12V minimum. Lower will cause idle freeze (just freeze no BSOD). Surprisingly it only freeze on idle. Full load never freeze.

IIRC ASUS motherboard default voltage is 1.25V probably equal to level 5 ? you can try reduce it and see if it freeze when idle or not.

Processor	9900k
Motherboard	Maximus HERO XI
Cooling	Arctic Liquid Freezer 2
Memory	G Skills Trident Z -32G
Video Card(s)	Asus trix RTX 2080 TI
Display(s)	lg 34gk950f
Case	Phanteks P6900S
Power Supply	Seasonic Prime Ultra 850W titanium

System Name	Can I run it
Processor	delidded i9-9900K (P0) @ 5.0Ghz + NB @ 4.7Ghz ~1.2V (VR VOUT) 1.024V IO and SA + Koolance CPU-380i
Motherboard	Asrock Z370 Taichi P4.20
Cooling	HWlabs Nemesis GTS 360 and GTX 240 / 3x Gentle Typhoon AP-15 1850 RPM / 3x EK Vardar / SC600 pump
Memory	2x8GB 2133Mhz OEM SK Hynix RAM (dual ranks AFR) @ 3500Mhz 16-18-18-36-360-2T 1.408V with 60mm fan
Video Card(s)	EVGA GTX 1080 Ti FTW3 + universal waterblock underclock @ 1721Mhz 0.8V 12488 mem(140W during gaming)
Storage	Transcend PCIE 220S 1TB , Seagate Barracuda 4TB
Display(s)	Acer XR341CK 3440x1440 75Hz G-Sync compatible calibrated by X-Rite i1 Display Pro Plus
Case	NZXT H440 White modded front and top panel for better airflow.
Power Supply	Corsair HX 750W 80+ Silver
Mouse	Logitech G Pro Wireless
Keyboard	Logitech G913 (GL clicky) for gaming , Ducky Shine 7 (Cherry MX red) for working
Software	Windows 10 Enterprise 2016 LTSB (1607 inside)
Benchmark Scores	1838 FIDE rating (inactive since 2010). ~2150 Lichess.org blitz rating.

PLL PLL termination voltage

Asryan

Enterprise24