In order to use my memory at its rated speed using the XMP settings, it has been necessary to increase my system agent voltage and my VCCIO voltage. The problem I seem to be experiencing is that increasing the VCCIO has enabled passing the POST but subsequent POSTs fail and I have to increase the VCCIO again. My concern is that increasing the VCCIO is causing some kind of damage which must be overcome by further increasing the VCCIO. Is this a known issue?
Right now I've disabled XMP so my memory is underclocked.
Last time I POSTed at VCCIO 1.16 V but later failed to POST even at 1.17 V. The font colour in the BIOS is red for voltages above 1.09 V so I'm hesitant to just keep increasing it.
OS: Win 10 Pro 64-bit
Mainboard: ASUS Z170 Pro Gaming, board revision 1.04, BIOS v3501
CPU: Intel i7 6700, Stock HSF, Undervolt Offset -0.075 V, VCCIO 1.16 V, System Agent 1.15 V, LLC 4 (all core enhancement DISABLED)
RAM: Corsair LPX Vengeance 2x8GB DDR4-3000 (CMK16GX4M2B3000C15), XMP
Graphics: Gigabyte NVIDIA GeForce GTX 950 w/ 2 GB
Sys Drive: Samsung Evo 750 SSD, 250 GB
Data Drives: OCZ Vertex 2 SSD, 60 GB; WDC WD1002FAEX-00Y9A0, ~1 TB; WDC WD2003FZEX-00Z4SA0, ~2 TB; WDC WD2002FAEX-00MJRA0, ~2 TB; RAID 0, ~300 GB [Maxtor 6B160MO x 2]
PCI-E SATA expansion: IOCREST SATA III 4-port PCI-e (SI-PEX40064)
PSU: XFX TS 750W (P1-750S-NLB9)
Bluetooth: Parani UD100 Bluetooth USB Adapter
Monitor: LG 21.5" W2246S-BF 16:9 Wide LCD Monitor 1920x1080 5ms
Logitech G500 mouse, K120 keyboard.
UEFI BIOS divergence from optimised default settings
AI Overclock Tuner [Auto]->[XMP]
DRAM Frequency [Auto]->[DDR4-3000 MHz]
Min. CPU Cache Ratio [Auto]->
Max CPU Cache Ratio [Auto]->
CPU Core/Cache Voltage [Auto]->[Offset Mode] (-0.075)
CPU VCCIO Voltage [Auto]->[1.09 V]
CPU System Agent Voltage [Auto]->[1.05 V]
DRAM Voltage [Auto]->[1.350]
DRAM CAS# Latency [Auto]->
DRAM RAS# to CAS# Delay [Auto]->
DRAM RAS# ACT Time [Auto]->
CPU Load-line Calibration [Auto]->[Level 4]
SATA Mode Selection [AHCI]->[RAID]
Model Name LED Lighting [Breathing Mode]->[Disabled]
SupremeFX LED Lighting [Breathing Mode]->[Disabled]
CPU Q-Fan Control [Auto]->[PWM Mode]
Okay, now I seem to be having the same problem again. This time with VCCIO set to 1.16 V and System Agent set to 1.18 V, the system doesn't boot. I'm afraid to keep increasing because it seems to me like I have to increase it on each boot in order to overcome some sort of damage caused by the previous increase and I can't keep increasing it forever.