Stock Vcore i7700k ?

[alexhua24]

What was the stock Voltage V-Core of an i7 7700k at stock speeds of 4.2ghz?
Was it 1.2V? and recommended to lower or go higher?

 

[volkgren]

Different motherboards have different amounts of voltage at stock. I recommend 1.2V instead of stock for better temps. Stock (Auto) is usually higher than that. Somewhere between 1.26-1.32V is what I've seen with my i7-7700K when left on Auto. Well, that's with Turbo enabled to 4.5GHz.

 

[alexhua24]

Different motherboards have different amounts of voltage at stock. I recommend 1.2V instead of stock for better temps. Stock (Auto) is usually higher than that. Somewhere between 1.26-1.32V is what I've seen with my i7-7700K when left on Auto. Well, that's with Turbo enabled to 4.5GHz.

It's a GA-Z170XP-SLI Rev1 with a Noctua DH-14 , Arctic Silver 5 Thermal paste. Fresh install Win 10 Pro. an 850 PRO 512 SSD. SP900 512 GGB SSD. 2 TB ST2000 HDD, 2x8GB DDR 4 RipJaws V 3000mhz Ram C15. Gtx 970.

I tried to overclock the CPU to 4.7GHz at 1.34v but it's not saving for some reason. I load back defaults but it didn't reset the Vcore.

Any idea how to overclock on this particular motherboard ?

Thanks in advance,

 

[volkgren]

What part is not saving? Frequency, vcore, or both?

 

[alexhua24]

What part is not saving? Frequency, vcore, or both?

The cpu at 4.7ghz. I pressed sabes and exit but still shows 4.2ghz in CPUz though the voltage changed to 1.34

 

[TJ Hooker]

If you really want things back to stock, reset the BIOS/clear CMOS.

 

[alexhua24]

If I reset cmos would I need update bios again to the latest version? Or can I Q flash it

 

[volkgren]

If I reset cmos would I need update bios again to the latest version? Or can I Q flash it

No, reseting BIOS does not revert to previous BIOS version. You will still have your same BIOS version.

 

[alexhua24]

I see. Thx . Any idea why my cpu can not overclock ? When I change the cpu clock ratio to 47. The cpu base clock is auto at 100mhz . I only touch two settings . The Vcore and cpu clock ratio and the save and exit. Am I missing something ?

 

[alexhua24]

It still shows 4.2ghz in system properties after overclocking it to 4.7?

 

[TJ Hooker]

It might be that your attempted overclock is unstable to the point it can't even POST, so it just reverts back to the last stable configuration (e.g. 4.2 GHz). Try increasing clock ratio one step at a time and see if those stick.

 

[alexhua24]

It might be that your attempted overclock is unstable to the point it can't even POST, so it just reverts back to the last stable configuration (e.g. 4.2 GHz). Try increasing clock ratio one step at a time and see if those stick.

 

[alexhua24]

It does post. The clock ratio and voltage did changed. When I checked it in CPUz. But under system properties on desk my computer. And benchmark programs such as cinebench and unigine heaven it shows 4.2ghz as processor speed.

 

[volkgren]

It does post. The clock ratio and voltage did changed. When I checked it in CPUz. But under system properties on desk my computer. And benchmark programs such as cinebench and unigine heaven it shows 4.2ghz as processor speed.

If CPU-Z says it's 4.7 then it's 4.7 regardless of those other programs. You will see 4.2GHz in some software because that is part of the CPU's factory programmed specifications that those softwares read.

 

[alexhua24]

It does post. The clock ratio and voltage did changed. When I checked it in CPUz. But under system properties on desk my computer. And benchmark programs such as cinebench and unigine heaven it shows 4.2ghz as processor speed.

If CPU-Z says it's 4.7 then it's 4.7 regardless of those other programs. You will see 4.2GHz in some software because that is part of the CPU's factory programmed specifications that those softwares read.

It doesn't show 4.7. It shows 4.2 ghz

 

[TJ Hooker]

The clock ratio and voltage did changed. When I checked it in CPUz.

It doesn't show 4.7. It shows 4.2 GHz

I'm confused. Does any program or utility show 4.7 GHz? If not, how do you know they changed? Maybe just post a screenshot of CPUz.

 

[alexhua24]

Heres a pic in CPUz and HWMonitor. It shows the core mutiplier changed to 47. and the Core clock speeds at 4700mhz. But under specification it still shows 4.2ghz

 

[alexhua24]

https://ibb.co/earz4S

 

[volkgren]

Heres a pic in CPUz and HWMonitor. It shows the core mutiplier changed to 47. and the Core clock speeds at 4700mhz. But under specification it still shows 4.2ghz

Because 4.2GHz is the stock specification of the i7-7700K. Specification is hard-coded on the chip. Multiplier can be changed and that's what you've done, overclocked to 4.7GHz as seen in the max cpu core clocks in HWMonitor.

Btw, HWInfo is a much better monitoring software than HWMonitor. HWMonitor has been known to give ridiculously false readings.

 

[alexhua24]

Thanks for the response appreciated .

What voltage is recommended for 4.7ghz with noctua dh14 cooler?

And are there anything else I should change in bios ?

 

[volkgren]

Different chips require different amounts of voltage. Mine needs about 1.27V for 4.7GHz, but I'm not entirely sure it's completely stable. I've run Prime95 for a few mins just playing with different settings. It might need a tad more voltge to be safe and prevent a random BSOD. 1.30V would be a good place to start testing.