4790k 4.6-4.8ghz OC target.

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Specs:

Proc: Intel Core i7 4790k
Cooler: Corsair H105 AIO Liquid CPU Cooler
Mobo: Gigabyte Z97X Gaming 5
RAM: 16gb GSkill TridentX 2400mhz DDR3 RAM
Cooler: GSkill Turbulence III Ram Cooler
Graphics card: Gigabyte GTX 980 G1 Gaming
Power Supply: Seasonic G750 Gold-Rated PSU
Case: Fractal Design Arc Midi R2
Boot Drive: Samsung 840 EVO 128gb SSD
Storage: WD Blue 500gb x 2

my 4790k is currently running at stock clocks @ 1.137 volts according to CPU-Z and 1.1414 volts according to Core Temp. My idle temps are at (deg C) 38 33 35 34. ambient is at 26-28 deg C. It was running like this for 4 months since i got my z97x gaming 5 mobo and its stable no errors whatsoever.

My question is, if I bump up to 4.7 or 4.8, will i be able to do it at less than 1.3V? given the current stable settings of my 4790k @ stock Thanks!
 
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mr91
I have a different motherboard however basically below is what i do.

Voltage is 1.275 adaptive
4.6 all Cores
4.0-4.6 Cache -- cache voltage to auto
XMP for my 1866 Memory

Above are the main settings & during testing my core and clock are at 4.6...

"This is the sweet spot for my cpu"

I suggest you start with 4.4 4.4 1.20 v if that is stable try 4.5 4.5 go up to 1.225 v then 4.6 4.6 1.25 v.
Make sure you watch a bunch of videos and read up about your motherboard.
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mr91

mr91

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I overclocked my cache and clock to 4.6, my idle temps are 30... I'm using a mini itx case and my voltage is 1.275.
My load temps are usally below 60 when gaming.

I'm using a h100i.


I suggest you slowly start overclocking and see what happens, good luck.
 
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Which one do you prefer? Static voltage or Adaptive voltage? And I just updated the bios of my mobo last night and i loaded Optimize defaults. My core voltage drop down a little bit. I run Intel XTU and Cinebench for a total of 15 runs, CPUZ now displays 4.4ghz @ 1.128 volts. What the heck? Do core voltages drop down if you update bios? So far at this voltage, i;m not getting errors, which is good.
 
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mr91

mr91

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I use adaptive, that's probably why my idle temps are low...

Are using auto or a static voltage?

What do you mean drop down?

I'm using adaptive with the power saving features, my voltages drop significantly unless the CPU is being worked...

what are you load temperatures with the Intel utility?
 
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mr91

mr91

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Absolutely, I can get to 4.6 @ 1.25 stable however I use 1.275. Going beyong 4.6 is a challenge...
 
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I tried ocing and these are my results:

4.4 ghz (stock)
Vcore = 1.118 volts
Core VIIN = 1.600 volts
Uncore = Auto (4.0)
Ring Voltage = Auto (1.050)
Multiplier (All x44 on all cores)
Load Temps Intel XTU/Prime 95 Blend test: 61 58 56 55

4.7 ghz
Vcore = 1.255 volts
Core VIIN = 1.9 volts
Uncore = set to 4.0
Ring Voltage = set to 1.200 volts
Multiplier (All x47 on all cores)
Load Temps on Intel Extreme Utility/Prime 95 Blend test = 75 77 73 71

I didn't try 4.6 and 4.5. I immediately went to 4.7 after watching a video on youtube how to overclock on a gigabyte board.

His settings on his 4790k on 4.8 ghz has a core voltage of 1.325v. Mine shows either whea uncorrectable or clock watchdog timeout blue screen error at that voltage. I'm not sure if it's because of my XMP profile 2400 mhz Gskill memory or because of some settings in the bios i need to up a little bit. How do you think should i proceed? I want to see if i can get a 4.9 or 4.8 tops. I have an h105 AIO but i doubt ill get to 5.0 without touching 1.4volts. 4.8 at 1.325 is bootable. but when i run a stress test from XTU it immediately blue screens sayign whea uncorrectable.
 
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mr91

mr91

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I suggest you stick to 4.7 & make sure your system isn't crashing when gaming...


quotemsg=15877265,0,1663391]I tried ocing and these are my results:

4.4 ghz (stock)
Vcore = 1.118 volts
Core VIIN = 1.600 volts
Uncore = Auto (4.0)
Ring Voltage = Auto (1.050)
Multiplier (All x44 on all cores)
Load Temps Intel XTU/Prime 95 Blend test: 61 58 56 55

4.7 ghz
Vcore = 1.255 volts
Core VIIN = 1.9 volts
Uncore = set to 4.0
Ring Voltage = set to 1.200 volts
Multiplier (All x47 on all cores)
Load Temps on Intel Extreme Utility/Prime 95 Blend test = 75 77 73 71

I didn't try 4.6 and 4.5. I immediately went to 4.7 after watching a video on youtube how to overclock on a gigabyte board.

His settings on his 4790k on 4.8 ghz has a core voltage of 1.325v. Mine shows either whea uncorrectable or clock watchdog timeout blue screen error at that voltage. I'm not sure if it's because of my XMP profile 2400 mhz Gskill memory or because of some settings in the bios i need to up a little bit. How do you think should i proceed? I want to see if i can get a 4.9 or 4.8 tops. I have an h105 AIO but i doubt ill get to 5.0 without touching 1.4volts. 4.8 at 1.325 is bootable. but when i run a stress test from XTU it immediately blue screens sayign whea uncorrectable.[/quotemsg]

 
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It just showed whea correctable error right now while i am watching linustechtips videos. :(( i'm at 4.4 ghz 1.118 volts. I uped the voltage by 0.005. now i'm at 1.123, i'll check for instabilities for now.
 
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mr91

mr91

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Did you get an error when watching a youtube video?

When using the CPU at stock I would use 1.18 to 1.2 V and use an adaptive voltage so that it goes down when not needed...

I find in testing that if the voltage is too low the performance is decreased and stability can be compromised.

The realty is that the 4790k is great @ stock and the OC will not make a massive difference...

Personally like like to keep the maximum core and cache boost the same speed...

I might be able to do 4.8 cpre 4.0 cache however I prefer 4.6 core 4.6 cache.
 
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can you post your 4.6 bios settings? maybe i can replicate it.

Okay so i found the sweet spot. 1.123 volts intel xtreme utility stress test stable for 6 hours for stock 4.4ghz

Yah, i do agree with low voltage = low performance. My cinebench score at this voltage is 806. The 4.4 4770k in the list has a score of 822. :(

My voltage right now is adaptive. I found that when i set everything to auto, my 4790k does 4.4 @ 1.213 volts. So my settings is like this Vcore = Normal, Vcore offset = -0.095


 
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