• Guest, The rules for the P & N subforum have been updated to prohibit "ad hominem" or personal attacks against other posters. See the full details in the post "Politics and News Rules & Guidelines."

Question I7 9700k Oc Not Stable


Junior Member
Feb 21, 2017
Hello everybody. So, recently, i've ugraded most of my components from my PC. So, i have a new i7 9700k with a Scythe Ninja 4, Gigabyte Aorus Pro motherboard, gtx 1080ti, PSU Corsair 750W, a samsung ssd 1TB Nvme, 16 gb ddr4 2400Mhz only, all together in a NZXT Case, with good cable management. I have the latest BIOS update. I am playing games in 1440p 144hz.
Ok, so i tried to overclock the CPU. And i started, first, by changing some of the settings from BIOS, after reading some oc guides, like this:
Enhanced Multi-Core Performance - disabled
AVX Offset - auto
SVID offset - disabled
VT-d -disabled
Intel Speed Shift Technology - disabled
Ring to core offset (down bin) - disabled
CPU EIST Function - disabled
Voltage Optimization - disabled
Intel Turbo Bost - disabled
Active Turbo Ratios - disabled
C-States Control - all disabled
CPU Vcore Loadline Calibration - Turbo (it has also, extreme and super extreme options)
I also have this, by default like that:
CPU Internal AC/DC Load Line - Auto
CPU Base Clock - Auto - meaning 100.00Mhz
Ring Ratio - Auto - meaning 43 (uncore ratio)
IGP Ratio - Auto - meaning 30.00
Then, i started slow, with 4.8ghz and 1.26V, all good in prime95 26.6, stable after 1 hour, and good temperatures, 90 celsius degrees on 2 cores maximum, but, when i started gaming, i got different blue screens, until i reached 1.30V, by increasing with 0.01V, step by step, and the temperatures were max 75 celsius degrees, but still, it's not stable, neither at 1.30V.
Then, i tried with 4.9ghz, starting from 1.31V, again, all good in prime95 26.6, stable, no bluescreens or freezes, temperatures around 95 celsius degrees on few cores, but, again, when i started gaming, it showed again bluescreens, until i reached 1.35V, and, again, temperatures were max 78 celsius degrees, but average around 75, and still, it's not stable, either at 1.35V.
I tried first Fifa 20 and CS:GO, and it appeared to be ok, but after those 2 were stable, i played Ghost Recon Breakpoint, and i can't play it stable atm, i get bluescreens after 15-30 minutes of playing. In fifa20 or csgo, at 4.8@1.30V or 4.9@1.35V, at least, after 1-2 hours, i didn't received any bluescreens.
I want to mention, that, i tried to put the uncore ratio to 46(manual), and i got some desktop random freezing, so i let it un auto aswell.
Is it really so hard to get it stable, or i am doing something wrong? On my last i7 7700k, i didn't had some many issues by making it stable, but this one, i am a little bit out of ideas, because in my oppinion, for daily usage, 4.9ghz @1.36V or more is a little bit risky, and maybe there is something else to change so i can make it stable.
I am here for more informations, if you need me and if you can please help me with some advices, i appreciate it. Thank you


CPU Moderator, VC&G Moderator, Elite Member
Super Moderator
May 16, 2002
I don't know Intel, and there are only about 4 people that I think are active that do Intel nowadays. AMD has pretty much taken over. And its thanksgiving day !


Elite Member
Super Moderator
Jun 10, 2004
For my 8700K I didn't disable any of those power saving features.

I also used a voltage offset of +50mV rather than setting a fixed voltage.

If you're not having luck might be worth trying an offset and seeing how far you can push it.


Golden Member
Nov 6, 2009
As I understand you, you have an i7 9700k which you OC'd to 4.8GHz right off the bat, and put AVX to "auto," whatever that means. Try this: use Intel's XTU so you are not rebooting your machine over and over. Stress it with LinX, and watch temps with Real Temp.

Start testing at 4.0GHz, and go up from there. At some point your temps will get hot, or your CPU will flake out on you. You will have to increase Vcore as you go. But if you are overclcxoking you know that. And set your AVX to 0, not Auto. The biggest difference between the 9700k and the 8700k (aside from core count) is that the 9700k uses solder under the IHS, not TIM.

Based on my own experience with the 14nm++, your Vcores look low. I had to use Vcore=1.375v to reach 5.0GHz. Your cooling solution figures big in this.

Just remember there is a "silicon lottery" effect, and you may have a poor-performing CPU. And because Intel brought out the 9900KS, they may be binning the 9700k differently.