i7 6850k Multiplier issue

Sobtanian · 28 Aug 2018 at 21:03

Hi all,

I've had an i7 6850k with an Asus Rampage V Extreme (X99) since the processor was first released. All that time I've had it on XMP2 (2800mhz DDR4 ram speeds) with the CPU OCed to 4000mhz (BCLK 100x40) and it has been solid/stable throughout.

Recently, I've noticed that the CPU runs at 3800mhz because the multiplier drops down to 38. No matter what I do in the BIOS, it starts off 4000mhz then drops down as soon as windows 10 loads.

I have changed nothing at all before this started, windows power management remains at high power (with 100% cpu power always). It literally started out of the blue. No new software other than whatever windows 10 update chucks at me. I've not touched a single BIOS setting since initially overclocking it.

CPU-Z has changed also, instead of reporting the multiplier to be x40, it now reports x38 (12 - 38). This clock range is new, I've never had it before and I suspect something is causing it but can't identify what.

Any ideas please? It's not really affecting performance for what I do (games and some Lightroom now and then) but it's really annoying me.

Thanks.

EDIT: forgot to mention that for some reason, CPU-Z also shows Core 5 to be x40, the rest times x38. I've tried disabling Turbo Boost, makes no difference. It's been enabled all this time anyway.

Disco_P · 29 Aug 2018 at 01:00

We're gonna need to see your bios settings for your overclock.

Sobtanian · 29 Aug 2018 at 11:04

OK thanks, I've dumped the whole bios settings below, sorry it's everything didn't want to miss anything out.

I should say again that these settings have worked for ages, nothing has changed in them.

Also, I discovered a weird thing today: if I stress the CPU (p95 blend), it underclocks straight down to 1.2ghz (12x100) and stays that way until the stress stops. I'm certain some random windows thing is doing this, I just can't think what. Could it be the Spectre updates recently??

Code:

[2018/08/29 10:23:22]
Ai Overclock Tuner [XMP]
XMP [XMP DDR4-2800 16-18-18-37-1.35V]
CPU Strap [Auto]
PLL Selection [Auto]
Filter PLL [Auto]
BCLK Frequency [100.0]
Initial BCLK Frequency [Auto]
ASUS MultiCore Enhancement [Auto]
CPU Core Ratio [Sync All Cores]
1-Core Ratio Limit [40]
2-Core Ratio Limit [40]
3-Core Ratio Limit [40]
4-Core Ratio Limit [40]
5-Core Ratio Limit [40]
6-Core Ratio Limit [40]
AVX Instruction Core Ratio Negative Offset [31]
Min. CPU Cache Ratio [Auto]
Max. CPU Cache Ratio [31]
Internal PLL Overvoltage [Auto]
BCLK Frequency : DRAM Frequency Ratio [Auto]
DRAM Frequency [DDR4-2800MHz]
Xtreme Tweaking [Disabled]
TPU [Keep Current Settings]
EPU Power Saving Mode [Disabled]
Fully Manual Mode [Disabled]
CPU Core Voltage [Auto]
CPU Cache Voltage [Auto]
CPU System Agent Voltage Offset Mode Sign [+]
CPU System Agent Voltage Offset [Auto]
CPU SVID Support [Auto]
CPU Input Voltage [Auto]
DRAM SVID Support [Auto]
DRAM Voltage(CHA, CHB) [Auto]
DRAM Voltage(CHC, CHD) [Auto]
PCH Core Voltage [Auto]
PCH I/O Voltage [Auto]
VCCIO CPU 1.05V Voltage [Auto]
VCCIO PCH 1.05V Voltage [Auto]
VTTDDR Voltage(CHA, CHB) [Auto]
VTTDDR Voltage(CHC, CHD) [Auto]
VPPDDR Voltage(CHA, CHB) [Auto]
VPPDDR Voltage(CHC, CHD) [Auto]
PLL Termination Voltage [Auto]
PLL Reference Offset Mode Sign [+]
PLL Reference Offset Value [Auto]
CPU Spread Spectrum [Auto]
BCLK Recovery [Enabled]
PLL Post Divider Adjust [Auto]
Internal PLL Voltage Prefix [+]
Internal PLL Voltage Step Adjustment [Auto]
VCCU Voltage Offset Prefix [+]
VCCU Voltage Offset [0]
CPU Input Boot Voltage [Auto]
CPU Input Eventual Voltage [Auto]
BCLK Amplitude [Auto]
ICC Ringback Canceller [Auto]
Cross-Talk Cancellation Voltage [Auto]
Gen3 Preset [Auto]
PCIE Clock Amplitude [Auto]
Rampage Tweak [Auto]
DRAM CAS# Latency [Auto]
DRAM RAS# to CAS# Delay [Auto]
DRAM RAS# PRE Time [Auto]
DRAM RAS# ACT Time [Auto]
DRAM Command Rate [Auto]
DRAM RAS# to RAS# Delay [Auto]
DRAM RAS# to RAS# Delay L [Auto]
DRAM REF Cycle Time [Auto]
DRAM Refresh Interval [Auto]
DRAM WRITE Recovery Time [Auto]
DRAM READ to PRE Time [Auto]
DRAM FOUR ACT WIN Time [Auto]
DRAM WRITE to READ Delay [Auto]
DRAM WRITE to READ Delay L [Auto]
DRAM CKE Minimum Pulse Width [Auto]
DRAM Write Latency [Auto]
tRRDR [Auto]
tRRDD [Auto]
tWWDR [Auto]
tWWDD [Auto]
tRWDR [Auto]
tWRDR [Auto]
tWRDD [Auto]
tRWSR [Auto]
tCCD [Auto]
tUWRDR [Auto]
tRWDR2 [Auto]
tRWDD [Auto]
tRWSR2 [Auto]
tWRDD2 [Auto]
tCCDWR [Auto]
tCCD_L [Auto]
DRAM Eventual Voltage(CHA, CHB) [Auto]
DRAM Eventual Voltage(CHC, CHD) [Auto]
DQ Sense Amp Sign [+]
DQ Sense Amp [Auto]
DQS Sense Amp Sign [+]
DQS Sense Amp [Auto]
CMD Sense Amp Sign [+]
CMD Sense Amp [Auto]
CTL Sense AmP Sign [+]
CTL Sense AmP [Auto]
DRAM CLK Period [Auto]
Memory Optimize Control [Auto]
Enhanced Training(CHA) [Auto]
Enhanced Training(CHB) [Auto]
Enhanced Training(CHC) [Auto]
Enhanced Training(CHD) [Auto]
DRAM Swizzling Bit 0 [Auto]
DRAM Swizzling Bit 1 [Auto]
DRAM Swizzling Bit 2 [Auto]
MemTest [Auto]
Attempt Fast Boot [Auto]
Attempt Fast Cold Boot [Auto]
DRAM Training [Auto]
DRAM SPD Write [Disabled]
DRAM RTL INIT value [Auto]
DRAM RTL (CHA D0 R0) [Auto]
DRAM RTL (CHA D0 R1) [Auto]
DRAM RTL (CHA D1 R0) [Auto]
DRAM RTL (CHA D1 R1) [Auto]
DRAM RTL (CHB D0 R0) [Auto]
DRAM RTL (CHB D0 R1) [Auto]
DRAM RTL (CHB D1 R0) [Auto]
DRAM RTL (CHB D1 R1) [Auto]
DRAM RTL (CHC D0 R0) [Auto]
DRAM RTL (CHC D0 R1) [Auto]
DRAM RTL (CHC D1 R0) [Auto]
DRAM RTL (CHC D1 R1) [Auto]
DRAM RTL (CHD D0 R0) [Auto]
DRAM RTL (CHD D0 R1) [Auto]
DRAM RTL (CHD D1 R0) [Auto]
DRAM RTL (CHD D1 R1) [Auto]
DRAM IOL (CHA D0 R0) [Auto]
DRAM IOL (CHA D0 R1) [Auto]
DRAM IOL (CHA D1 R0) [Auto]
DRAM IOL (CHA D1 R1) [Auto]
DRAM IOL (CHB D0 R0) [Auto]
DRAM IOL (CHB D0 R1) [Auto]
DRAM IOL (CHB D1 R0) [Auto]
DRAM IOL (CHB D1 R1) [Auto]
DRAM IOL (CHC D0 R0) [Auto]
DRAM IOL (CHC D0 R1) [Auto]
DRAM IOL (CHC D1 R0) [Auto]
DRAM IOL (CHC D1 R1) [Auto]
DRAM IOL (CHD D0 R0) [Auto]
DRAM IOL (CHD D0 R1) [Auto]
DRAM IOL (CHD D1 R0) [Auto]
DRAM IOL (CHD D1 R1) [Auto]
MC Vref(CHA) [Auto]
MC Vref(CHB) [Auto]
MC Vref(CHC) [Auto]
MC Vref(CHD) [Auto]
DRAM Vref(CHA) [Auto]
DRAM Vref(CHB) [Auto]
DRAM Vref(CHC) [Auto]
DRAM Vref(CHD) [Auto]
CTL Vref (CHAB) Sign [+]
CTL Vref (CHAB) [Auto]
CTL Vref (CHCD) Sign [+]
CTL Verf (CHCD) [Auto]
Receiver DQ Pre-emphasis [Auto]
Receiver DQ De-emphasis [Auto]
Transmitter DQ De-emphasis [Auto]
Receiver DQS Pre-emphasis [Auto]
Receiver DQS De-emphasis [Auto]
Transmitter DQS De-emphasis [Auto]
Receiver CMD Pre-emphasis [Auto]
Receiver CMD De-emphasis [Auto]
Transmitter CMD De-emphasis [Auto]
Receiver CLK Pre-emphasis [Auto]
Receiver CLK De-emphasis [Auto]
Transmitter CLK De-emphasis [Auto]
Receiver CTL Pre-emphasis [Auto]
Receiver CTL De-emphasis [Auto]
Transmitter CTL De-emphasis [Auto]
Receiver ODT Pre-emphasis [Auto]
Receiver ODT De-emphasis [Auto]
Transmitter ODT De-emphasis [Auto]
CPU Load-line Calibration [Auto]
CPU VRM Switching Frequency [Auto]
VRM Spread Spectrum [Auto]
CPU Power Phase Control [Auto]
CPU Power Duty Control [T.Probe]
CPU Current Capability [Auto]
CPU Power Thermal Control [115]
DRAM Current Capability(CHA, CHB) [100%]
DRAM Current Capability(CHC, CHD) [100%]
DRAM Switching Frequency(CHA, CHB) [Auto]
DRAM Switching Frequency(CHC, CHD) [Auto]
DRAM Power Phase Control(CHA, CHB) [Standard]
DRAM Power Phase Control(CHC, CHD) [Standard]
Enhanced Intel SpeedStep Technology [Enabled]
Turbo Mode [Enabled]
Long Duration Package Power Limit [Auto]
Package Power Time Window [Auto]
Short Duration Package Power Limit [Auto]
CPU Integrated VR Current Limit [Auto]
CPU Integrated VR Fault Management [Auto]
CPU Integrated VR Efficiency Management [Auto]
Disable Parity Workaround [Disabled]
CMD Margins [40]
Serial Debug Message Level [Disabled]
Multi-Threaded MRC [Auto]
MemTestLoops [1]
EarlyCtlClk [Auto]
EarlyCmdClk [Auto]
Ddr4LrdimmBacksideRxPhase [Auto]
Ddr4LrdimmBacksideRxCycle [Auto]
Ddr4LrdimmBacksideRxDelay [Auto]
ReceiveEnable [Auto]
ReadDqDqs [Auto]
Ddr4LrdimmBacksideTxFineWL [Auto]
Ddr4LrdimmBacksideTxCoarseWL [Auto]
Ddr4LrdimmBacksideTxDelay [Auto]
WriteLeveling [Auto]
WriteLevelingCleanUp [Auto]
WrDqDqs [Auto]
WrEarlyVrefCentering [Auto]
RdEarlyVrefCentering [Auto]
LateCmdClk [Auto]
TxEqTraining [Auto]
ImodeTraining [Auto]
RxPerBitDeskew [Auto]
TxPerBitDeskew [Auto]
WrVrefCentering [Auto]
RdVrefCentering [Auto]
WrAdvancedCentering [Auto]
RdAdvancedCentering [Auto]
RoundTripOptimize [Auto]
SwitchToNormalMode [Auto]
RankMarginTool [Auto]
tRWDS [Auto]
tWWDS [Auto]
tRRDS [Auto]
tWRDS [Auto]
TXP DLL [Auto]
TXS OFFSET [Auto]
TXP [Auto]
DRAM_TSTAGGER_REF [Auto]
DRAM Refresh Interval (nREFIx9) [Auto]
t_cs_oe [Auto]
t_odt_oe [Auto]
shift_odt_early [Auto]
orefni [Auto]
Idle Page Rst Val [Auto]
Window Size [Auto]
PPC TH [Auto]
OPC TH [Auto]
Adapt pg clse [Auto]
pre_enable [Auto]
act_enable [Auto]
dis_opp_rd [Auto]
max_rpq_cas [Auto]
STR_OCMR_DRAM_TCKSRX [Auto]
Data Scrambling [Auto]
ddrCRCompCtl1 DQ Scomp delay cells (CHAB) [Auto]
ddrCRCompCtl1 DQ Scomp PC (CHAB) [Auto]
ddrCRCompCtl1 CMD Scomp delay cells (CHAB) [Auto]
ddrCRCompCtl1 CMD Scomp PC (CHAB) [Auto]
ddrCRCompCtl1 CTL Scomp delay cells (CHAB) [Auto]
ddrCRCompCtl1 CTL Scomp PC (CHAB) [Auto]
ddrCRCompCtl1 DQ Scomp delay cells (after) (CHAB) [Auto]
ddrCRCompCtl1 DQ Scomp PC (after) (CHAB) [Auto]
ddrCRCompCtl1 CMD Scomp delay cells (after) (CHAB) [Auto]
ddrCRCompCtl1 CMD Scomp PC (after) (CHAB) [Auto]
ddrCRCompCtl1 CTL Scomp delay cells (after) (CHAB) [Auto]
ddrCRCompCtl1 CTL Scomp PC (after) (CHAB) [Auto]
ddrCRCompCtl1 DQ Scomp delay cells (CHCD) [Auto]
ddrCRCompCtl1 DQ Scomp PC (CHCD) [Auto]
ddrCRCompCtl1 CMD Scomp delay cells (CHCD) [Auto]
ddrCRCompCtl1 CMD Scomp PC (CHCD) [Auto]
ddrCRCompCtl1 CTL Scomp delay cells (CHCD) [Auto]
ddrCRCompCtl1 CTL Scomp PC (CHCD) [Auto]
ddrCRCompCtl1 DQ Scomp delay cells (after) (CHCD) [Auto]
ddrCRCompCtl1 DQ Scomp PC (after) (CHCD) [Auto]
ddrCRCompCtl1 CMD Scomp delay cells (after) (CHCD) [Auto]
ddrCRCompCtl1 CMD Scomp PC (after) (CHCD) [Auto]
ddrCRCompCtl1 CTL Scomp delay cells (after) (CHCD) [Auto]
ddrCRCompCtl1 CTL Scomp PC (after) (CHCD) [Auto]
ddrCRClkComp Scomp ChA [Auto]
ddrCRClkComp Scomp ChB [Auto]
ddrCRClkComp Scomp ChC [Auto]
ddrCRClkComp Scomp ChD [Auto]
ddrCRCmdComp Scomp ChA [Auto]
ddrCRCmdComp Scomp ChB [Auto]
ddrCRCmdComp Scomp ChC [Auto]
ddrCRCmdComp Scomp ChD [Auto]
ddrCRCtlComp Scomp ChA [Auto]
ddrCRCtlComp Scomp ChB [Auto]
ddrCRCtlComp Scomp ChC [Auto]
ddrCRCtlComp Scomp ChD [Auto]
DDR DEBUG MR0 [0]
DDR DEBUG MR1 [0]
DDR DEBUG MR2 [0]
MRC Delay Time [Auto]
ODT RTTWR(CHA D0 R0) [Auto]
ODT RTTWR(CHA D0 R1) [Auto]
ODT RTTWR(CHA D1 R0) [Auto]
ODT RTTWR(CHA D1 R1) [Auto]
ODT RTTWR(CHB D0 R0) [Auto]
ODT RTTWR(CHB D0 R1) [Auto]
ODT RTTWR(CHB D1 R0) [Auto]
ODT RTTWR(CHB D1 R1) [Auto]
ODT RTTWR(CHC D0 R0) [Auto]
ODT RTTWR(CHC D0 R1) [Auto]
ODT RTTWR(CHC D1 R0) [Auto]
ODT RTTWR(CHC D1 R1) [Auto]
ODT RTTWR(CHD D0 R0) [Auto]
ODT RTTWR(CHD D0 R1) [Auto]
ODT RTTWR(CHD D1 R0) [Auto]
ODT RTTWR(CHD D1 R1) [Auto]
ODT RTTNOM(CHA D0 R0) [Auto]
ODT RTTNOM(CHA D0 R1) [Auto]
ODT RTTNOM(CHA D1 R0) [Auto]
ODT RTTNOM(CHA D1 R1) [Auto]
ODT RTTNOM(CHB D0 R0) [Auto]
ODT RTTNOM(CHB D0 R1) [Auto]
ODT RTTNOM(CHB D1 R0) [Auto]
ODT RTTNOM(CHB D1 R1) [Auto]
ODT RTTNOM(CHC D0 R0) [Auto]
ODT RTTNOM(CHC D0 R1) [Auto]
ODT RTTNOM(CHC D1 R0) [Auto]
ODT RTTNOM(CHC D1 R1) [Auto]
ODT RTTNOM(CHD D0 R0) [Auto]
ODT RTTNOM(CHD D0 R1) [Auto]
ODT RTTNOM(CHD D1 R0) [Auto]
ODT RTTNOM(CHD D1 R1) [Auto]
ODT RTTPARK(CHA D0 R0) [Auto]
ODT RTTPARK(CHA D0 R1) [Auto]
ODT RTTPARK(CHA D1 R0) [Auto]
ODT RTTPARK(CHA D1 R1) [Auto]
ODT RTTPARK(CHB D0 R0) [Auto]
ODT RTTPARK(CHB D0 R1) [Auto]
ODT RTTPARK(CHB D1 R0) [Auto]
ODT RTTPARK(CHB D1 R1) [Auto]
ODT RTTPARK(CHC D0 R0) [Auto]
ODT RTTPARK(CHC D0 R1) [Auto]
ODT RTTPARK(CHC D1 R0) [Auto]
ODT RTTPARK(CHC D1 R1) [Auto]
ODT RTTPARK(CHD D0 R0) [Auto]
ODT RTTPARK(CHD D0 R1) [Auto]
ODT RTTPARK(CHD D1 R0) [Auto]
ODT RTTPARK(CHD D1 R1) [Auto]
dqdrvpupvref Vref [Auto]
dqdrvpdnvref Vref [Auto]
dqodtpupvref Vref [Auto]
tcovref Vref [Auto]
dqodtpdnvref Vref [Auto]
clkdrvpupvref Vref [Auto]
clkdrvpdnvref Vref [Auto]
cmddrvpupvref Vref [Auto]
cmddrvpdnvref Vref [Auto]
ctldrvpupvref Vref [Auto]
ctldrvpdnvref Vref [Auto]
Hyper-Threading [ALL] [Enabled]
Intel Adaptive Thermal Monitor [Enabled]
Limit CPUID Maximum [Disabled]
Execute Disable Bit [Enabled]
Intel Virtualization Technology [Enabled]
Hardware Prefetcher [Enabled]
Adjacent Cache Line Prefetcher [Enabled]
Boot Performance Mode [Max Performance]
Maximum CPU Core Temperature [Auto]
Active Processor Core 0 [Enabled]
Active Processor Core 1 [Enabled]
Active Processor Core 2 [Enabled]
Active Processor Core 3 [Enabled]
Active Processor Core 4 [Enabled]
Active Processor Core 5 [Enabled]
Enhanced Intel SpeedStep Technology [Enabled]
Turbo Mode [Enabled]
CPU C-States [Auto]
PCIe Speed [Auto]
Intel Rapid Start Technology [Enabled]
Hyper kit Mode [Disabled]
SATAExpress_1 SRIS Support [Auto]
S.M.A.R.T. Status Check [Enabled]
SATA Controller 1 Mode Selection [RAID]
Support Aggressive Link Power Management [Disabled]
SATA6G_1(Red) [Enabled]
Hot Plug [Disabled]
SATA6G_2(Red) [Enabled]
Hot Plug [Disabled]
SATA6G_3(Red) [Enabled]
Hot Plug [Disabled]
SATA6G_4(Red) [Enabled]
Hot Plug [Disabled]
SATA6G_5(Red) [Enabled]
Hot Plug [Disabled]
SATA6G_6(Red) [Enabled]
Hot Plug [Disabled]
SATA Controller 2 Mode Selection [AHCI]
Support Aggressive Link Power Management [Disabled]
SATA6G_7(Red) [Enabled]
Hot Plug [Disabled]
SATA6G_8(Red) [Enabled]
Hot Plug [Disabled]
SATA6G_9(Red) [Enabled]
Hot Plug [Disabled]
SATA6G_10(Red) [Enabled]
Hot Plug [Disabled]
SATA Led locate [Enabled]
RAID 0 [Enabled]
RAID 1 [Enabled]
RAID 10 [Enabled]
RAID 5 [Enabled]
Intel Rapid Start Technology [Enabled]
RAID Option ROM  UI banner [Enabled]
IRRT Only on ESATA [Enabled]
RAID OROM prompt delay [2 Seconds]
SATA HDD Unlock [Enabled]
SATA Led locate [Enabled]
MCTP [Disabled]
ACS Control [Disabled]
PCIEX16_1 Link Speed [Auto]
PCIEX8_2 Link Speed [Auto]
PCIEX16_3 Link Speed [Auto]
PCIEX8_4 Link Speed [Auto]
Intel VT for Directed I/O (VT-d) [Disabled]
DMI Gen 2 [Enabled]
Intel xHCI Mode [Smart Auto]
EHCI Legacy Support [Enabled]
xHCI Hand-off [Enabled]
EHCI Hand-off [Disabled]
KingstonDataTraveler 3.0PMAP [Auto]
Generic-USB3.0 CRW-CF/MD1.00 [Auto]
Generic-USB3.0 CRW-SM/xD1.00 [Auto]
Generic-USB3.0 CRW-SD 1.00 [Auto]
Generic-USB3.0 CRW-MS 1.00 [Auto]
Generic-USB3.0 CRW-SD/MS1.00 [Auto]
USB3_1 [Enabled]
USB3_2 [Enabled]
USB3_3 [Enabled]
USB3_4 [Enabled]
USB_7 [Enabled]
USB_8 [Enabled]
USB_11 [Enabled]
USB_12 [Enabled]
USB_13 [Enabled]
USB_14 [Enabled]
USB3_E1 [Enabled]
USB3_E2 [Enabled]
USB3_E3 [Enabled]
USB3_E4 [Enabled]
USB3_E5 [Enabled]
USB3_E6 [Enabled]
USB3_E7 [Enabled]
USB3_E8 [Enabled]
USB3_E1 [Enabled]
USB3_E2 [Enabled]
ErP Ready [Disabled]
Restore AC Power Loss [Power Off]
Power On By PCI-E/PCI [Disabled]
Power On By RTC [Disabled]
HD Audio Controller [Disabled]
PCIEx8_4 and M.2 Configuration [Auto]
Asmedia USB 3.0 Controller [Enabled]
Asmedia USB 3.0 Battery Charging Support [Disabled]
ASM106SE Storage Controller(SATAEXPRESS_E1) [Enabled]
Windows Hot-plug Notification [Disabled]
ASPM Support [Disabled]
SATAEXPRESS_E1 SRIS Support [Auto]
Bluetooth Controller [Enabled]
Wi-Fi Controller [Enabled]
Intel LAN Controller [Enabled]
Intel LAN PXE Option ROM [Disabled]
SA DMI ASPM [Disabled]
PEG ASPM Support [Disabled]
PCH DMI ASPM [Disabled]
ASPM Support [Disabled]
Network Stack [Disabled]
Onboard LED [Enabled]
ROG logo LED [Enabled]
Relaxed Ordering [Disabled]
Extended Tag [Disabled]
No Snoop [Enabled]
Maximum Payload [Auto]
Extended Synch [Disabled]
Link Training Retry [5]
Link Training Timeout (uS) [1000]
Restore PCIE Registers [Disabled]
Completion Timeout [Default]
ARI Forwarding [Disabled]
AtomicOp Requester Enable [Disabled]
AtomicOp Egress Blocking [Disabled]
IDO Request Enable [Disabled]
IDO Completion Enable [Disabled]
LTR Mechanism Enable [Disabled]
End-End TLP Prefix Blocking [Disabled]
Clock Power Management [Disabled]
Compliance SOS [Disabled]
Hardware Autonomous Width [Enabled]
Hardware Autonomous Speed [Enabled]
BIOS Hot-Plug Support [Enabled]
PCI Buses Padding [1]
I/O Resources Padding [4 K]
MMIO 32 bit Resources Padding [16 M]
PFMMIO 32 bit Resources Padding [16 M]
Intel Thunderbolt Technology [Disabled]
CPU Temperature [Monitor]
MotherBoard Temperature [Monitor]
VRM Temperature [Monitor]
PCH Temperature [Monitor]
T_Sensor1 Temperature [Monitor]
T_Sensor2 Temperature [Monitor]
T_Sensor3 Temperature [Monitor]
CPU Fan Speed [Monitor]
CPU Optional Fan Speed [Monitor]
Chassis Fan 1A Speed [Monitor]
Chassis Fan 2A Speed [Monitor]
Chassis Fan 3A Speed [Monitor]
Chassis Fan 1B Speed [Monitor]
Chassis Fan 2B Speed [Monitor]
Chassis Fan 3B Speed [Monitor]
CPU Core Voltage [Monitor]
3.3V Voltage [Monitor]
5V Voltage [Monitor]
12V Voltage [Monitor]
CPU Cache Voltage [Monitor]
CPU System Agent Voltage [Monitor]
CPU Input Voltage [Monitor]
DRAM Voltage(CHA, CHB) [Monitor]
DRAM Voltage(CHC, CHD) [Monitor]
PCH Core Voltage [Monitor]
PCH I/O Voltage [Monitor]
VCCIO CPU 1.05V Voltage [Monitor]
VCCIO PCH 1.05V Voltage [Monitor]
CPU Q-Fan Control [Auto]
CPU Fan Speed Lower Limit [300 RPM]
CPU Fan Profile [Standard]
Chassis Fan 1 Q-Fan Control [DC Mode]
Chassis Fan 1 Q-Fan Source [CPU]
Chassis Fan 1 Speed Low Limit [300 RPM]
Chassis Fan 1 Profile [Standard]
Chassis Fan 2 Q-Fan Control [DC Mode]
Chassis Fan 2 Q-Fan Source [CPU]
Chassis Fan 2 Speed Low Limit [300 RPM]
Chassis Fan 2 Profile [Standard]
Chassis Fan 3 Q-Fan Control [DC Mode]
Chassis Fan 3 Q-Fan Source [CPU]
Chassis Fan 3 Speed Low Limit [300 RPM]
Chassis Fan 3 Profile [Standard]
Anti Surge Support [Enabled]
Fast Boot [Disabled]
Boot Logo Display [Disabled]
POST Report [5 sec]
Boot up NumLock State [Disabled]
Wait For 'F1' If Error [Enabled]
Option ROM Messages [Force BIOS]
INT19 Trap Response [Immediate]
Above 4G Decoding [Disabled]
Setup Mode [Advanced Mode]
Launch CSM [Enabled]
Boot Device Control [UEFI and Legacy OPROM]
Boot from Network Devices [Legacy only]
Boot from Storage Devices [Legacy only]
Boot from PCI-E/PCI Expansion Devices [Legacy only]
OS Type [Windows UEFI mode]
Setup Animator [Disabled]
Load from Profile [1]
Profile Name [sob]
Save to Profile [1]
CPU Core Voltage [Auto]
CPU Input Voltage [Auto]
BCLK Frequency [Auto]
CPU Ratio [Auto]
Cache Ratio [Auto]

Disco_P · 29 Aug 2018 at 13:52

How are temperatures? P95 uses AVX and your AVX Instruction Core Ratio Negative Offset seems to be super high. From what I understand that's trying to reduce your core frequency by 3100Mhz under AVX load which is absurd. I'd recommend a much lower value, say 5.

How are temperatures?

darket · 29 Aug 2018 at 14:08

Disco_P said:
How are temperatures? P95 uses AVX and your AVX Instruction Core Ratio Negative Offset seems to be super high. From what I understand that's trying to reduce your core frequency by 3100Mhz under AVX load which is absurd. I'd recommend a much lower value, say 5.

How are temperatures?

I would go a few steps further :-

DRAM SVID Support [Disable]
CPU SVID Support [Disable]
CPU Spread Spectrum [Disable]
CPU Input Voltage [1.8]
CPU Load-line Calibration [Level 5]
AVX Instruction Core Ratio Negative Offset [0]

At 4ghz you don't need any avx offset , if its getting too hot under avx workloads your cooling solution is poor, also keep an eye on your SA voltage , Asus boards can massively overvolt this which can damage the chip longterm, keep it between 0.8 and 1.1v.

I would also set the cpu voltage manually , i would run with adaptive and set and 'Additional turbo mode cpu core voltage' of 1.2v and try to work down from there.

Sobtanian · 29 Aug 2018 at 16:45

Hi so I did the above changes, AVX can’t be set to 0, so set it at minimum (1)

What this did solve is the prime95 issue, so cpu didn’t throttle under stress. Temperatures are fine (it’s cooled with a Corsair H100i)

However sadly the main issue remains. Bios is set to 40x100; which initially the cpu starts off as, the when windows loads it reverts back to 12-38 multiplier range

darket · 30 Aug 2018 at 09:18

sounds like a software issue within windows or a power plan setting , do you have any asus software installed ? and try avx negative offset- Auto , i'm pretty sure that means disabled.

Set the power plan to High performance and make sure the power plan's maximum cpu state is at 100%

Sobtanian · 30 Aug 2018 at 11:19

darket said:
sounds like a software issue within windows or a power plan setting , do you have any asus software installed ? and try avx negative offset- Auto , i'm pretty sure that means disabled.

Set the power plan to High performance and make sure the power plan's maximum cpu state is at 100%

You see this is what confuses me, I've installed/changed nothing and power plan is at 100% cpu as it's always been.
Played around with XTU today, it can set the clocks back again but I have to manually do it after any reboot....

I think I'm going to do a fresh W10 install and see what happens.

darket · 30 Aug 2018 at 15:17

before you do that pull the bios battery and unplug the kettle lead , hold the power button in and reset that bios, could be a bios bug , i've had similar issues on x99 in the past.

Sobtanian · 31 Aug 2018 at 00:55

Reinstalled windows and installed everything I had installed before. Other than CPU-Z, nothing installed to do with cpu or overclocking.

Seems to have fixed it.

I have no idea what/why this all happened.
I’ve pushed it to 4.2 now thanks to your bios settings above

Sobtanian · 31 Aug 2018 at 00:56

darket said:
before you do that pull the bios battery and unplug the kettle lead , hold the power button in and reset that bios, could be a bios bug , i've had similar issues on x99 in the past.

Sorry just saw this. I’d already done that when it first started and it didn’t help

darket · 31 Aug 2018 at 10:13

Sobtanian said:
Reinstalled windows and installed everything I had installed before. Other than CPU-Z, nothing installed to do with cpu or overclocking.

Seems to have fixed it.

I have no idea what/why this all happened.
I’ve pushed it to 4.2 now thanks to your bios settings above

Fantastic, now see how far you can push that multiplier