[SOLVED] Strange behaviour with my new 9700k. High voltages and temperatures.

[thelynx]

Hi, I just built my system a few days ago with a 9700k and an RTX 2080. My motherboard is the Gigabyte Z390 Aorus Pro WiFi and I am using a Cryorig H7 Plus cooler (push and pull config). When I first used the PC I left the mobo settings on default and was getting about 35c idle on all cores, 70c in Cinebench, 75-80ish degrees when playing intensive games and X-Plane 11, and around 95-100c almost instantly with Prime95 and AVX. I then dissasembled the PC, cleaned the CPU and cooler with Isopropyl alcohol, and reseated the cooler tightly with Arctic MX-4 paste, confirming contact with the CPU.

My results were exactly the same. I then disabled Multi-Core Performance/MCE and set the voltage manually. I set the Vcore and have now got it possibly stable at 1.235v (Bsod after 1 hour in GTA at 1.23v) in everything but Prime95, where it instantly freezes the whole system, even in the blend mode. When playing GTA V, I can see it is running at 4.6ghz on all cores and I get 55-70c maximum. Prime95 instantly freezes and hangs the system, Aida64 runs fine at about 70c and Cinebench R15 completes at about 65c. From what I have seen, 1.235v is high for a stock CPU, especially at 4.6ghz, and not even running Prime95 without hanging and having to reset the voltage to auto, where it pushes it to about 1.34v. Is this normal, is something wrong with the chip, or did I just lose the silicon lottery? Thanks for any answers in advance.

 

[Supahos]

That cooler isn't nearly sufficient for that cpu unless you want to trash performance and actually run it close to 95w. All boards automatically oc the processor because well they can. It's made to run a 3.6 with all cores active... So actually 4.6 is a pretty substantial oc if all cores are loaded. They claim 95w for that cpu, but even at "stock" settings on most boards it's more like 145+w

 

[WildCard999]

That cooler isn't nearly sufficient for that cpu unless you want to trash performance and actually run it close to 95w. All boards automatically oc the processor because well they can. It's made to run a 3.6 with all cores active... So actually 4.6 is a pretty substantial oc if all cores are loaded. They claim 95w for that cpu, but even at "stock" settings on most boards it's more like 145+w

130W per ARK under Thermal Solution Specification (Intel Reference Heat Sink specification for proper operation of this SKU.)

https://ark.intel.com/products/186604/Intel-Core-i7-9700K-Processor-12M-Cache-up-to-4-90-GHz-


I'd get the Be Quiet Dark Rock 4 Pro.
https://www.bequiet.com/en/cpucooler/1378

 

[thelynx]

Ok, I didn't think 4.6ghz was that high of a clock as I had seen 5.0ghz at 1.275v. I've also seen other people with Kraken X62 liquid aios and 280mm liquid coolers getting not that much better temps.

 

[WildCard999]

Ok, I didn't think 4.6ghz was that high of a clock as I had seen 5.0ghz at 1.275v. I've also seen other people with Kraken X62 liquid aios and 280mm liquid coolers getting not that much better temps.

Technically the Cryorig H7 is rated to work with that CPU as it's 150W TDP however for overclocking I'd get something substantially better.
http://www.cryorig.com/h7_us.php

 

[Supahos]

https://www.tomshardware.com/reviews/intel-core-i7-9700k-9th-gen-cpu,5876-2.html

Tom's playing with it in what I assume is an open case

 

[WildCard999]

https://www.tomshardware.com/reviews/intel-core-i7-9700k-9th-gen-cpu,5876-2.html

Tom's playing with it in what I assume is an open case

Possibly, though there using the Corsair H115i.

 

[Srna]

When i left voltages on auto i was getting like 1.43V +- on stress tests on my i7-9700k, had to change it manually 😀

 

[Supahos]

All boards overclock the hell out of those processors by default. I don't know why Intel allows them to do that, but they do