Perform a stable 4.8 on i7-4790K

[Jobba]

Hello,

my goal is to achieve a stable 4.8Ghz on the i7-4790k.
I have an Asus Maximus Ranger VII, 16 GB ddr3 1866 and a gtx 980ti.
Everything is on liquid.
With the actual configuration after 5 hours of prime 95 I had no trouble, same with 10 benchmark of XTU or 3d Mark.

But while I was playing the withcer 3 I received the BSOD IRQL_NOT_LESS_OR_EQUAL, and from the other forum about WIndows 10 I have been told that is most likely to be the cpu oc.

If anyone could help me to find a stable setting I would be glad.
Here I post the actual BIOS configuration:

MENU' EXTREME TWEAKER:
AI OVERCLOCK TUNER: XMP 2
CPU STRAP: 100 MHZ
PLL SELECTION: SB PLL
FILTER PLL: HIGH BCLK MODE
ASUS MULTICORE ENHANCEMENT: DISABLED
CPU CORE RATIO: SYNC ALL CORE
CORE RATIO LIMIT: AUTO
MIN CPU CACHE RATIO: 43
MAX CPU CACHE RATIO: 43
INTERNAL PLL OVERVOLTAGE: ENABLED
BCLK FREQUENCY-DRAM FREQUENCY RATIO: AUTO
DRAM FREQUENCY: 1866
EXTREME TWEAKING: ENABLED
CPU LEVEL UP: AUTO
EPU POWER SAVING MODE: DISABLED
CPU CORE VOLTAGE: MANUAL MODE
CPU CORE VOLTAGE OVERRIDE: 1,295
CPU CACHE VOLTAGE: MANUAL MODE
CPU CACHE VOLTAGE OVERRIDE: 1,295
CPU SYSTEM AGENT VOLTAGE OFFSET: 0,200
CPU ANALOG I/O VOLTAGE OFFSET:0,150
CPU DIGITAL I/O VOLTAGE OFFSET: 0,200
SVID SUPPORT: DISABLED
INITIAL CPU INPUT VOLTAGE: 1,700 EVENTUAL CPU INPUT VOLTAGE: 1,700
DRAM VOLTAGE: AUTO

CPU SPREAD SPECTRUM: DISABLED
BCLK RECOVERY: DISABLED

MENU CPU POWER MANAGEMENT:
ENHANCED INTEL SPEEDSTEP TECHNOLOGY: DISABLED
TURBO MODE: ENABLED


MENU' ADVANCED: SOTTOMENU' CPU CONFIGURATION:
INTEL ADAPTIVE THERMAL MONITOR: DISABLED
HYPER-THREADING: ENABLED
ACTIVE PROCESSOR CORES: ALL
LIMIT CPUID MAXIMUM: DISABLED
EXECUTE DISABLE BIT: DISABLED
INTEL VIRTUALIZATION TECHNOLOGY: DISABLED
HARDWARE PREFETCHER (L2 CACHE): ENABLED
ADJACENT CACHE LINE PREFETCHER: ENABLED
BOOY PERFORMANCE MODE: MAX NON TURBO PERFORMANCE
DYNAMIC STORAGE ACCELLERATOR: DISABLED

MENU' ADVANCED: SOTTOMENU' CPU CONFIGURATION: SOTTOMENU' CPU POWER MANAG. CONFIG:

ENHANCED INTEL SPPED STEP TECHNOLOGY: DISABLED
TURBO MODE: ENABLED
CPU C-STATES: ENABLED
CFG LOCK: DISABLED

Max temp was 69 at the end of Prime 95.

Thanks to anyone

 

[Geekwad]

Tweaking from here will probably involve fine-tuning memory settings and verifying for longer.

 

[Jobba]

ouch,
last time I did memory tweaking was long time ago .
Any useful tips or guide that you know could be a good starting point?

thanks for the answer

 

[Geekwad]

Give this thread a check:

https://linustechtips.com/main/topic/41234-intel-haswell-4670k-4770k-overclocking-guide/

Also goes into uncore adjustments, which is probably necessary as you're pushing the upper limits.

 

[Arronleeds]

you wont get 4.8ghz on a 4790k at voltage that low mate, you would have to have a really good lucky chip.

you could probably do 4.8ghz stable at 1.32v.

 

[Jobba]

sprry for late answer but I have been quite busy =)

I think I might have quite lucky CPU =D

so, I have worked on the cache voltage and multiplier, and with a cache speed of 35 and 1.2v , vith a 1.293vcore has been eprfectly stable on 12 hours of aida64.
I have tried it on a daily use and no problem with gaming, temp max was 70 in aida and 63 after couple of hours of withcer 3, still, is causing crash when playing the division, not BSOD, just game crash.

Anyone has any suggestion?
Should i try to increse the vcore?