The system stops entirely during testing with a 4790k OC 4.6ghz 1.250vcore setting.
The system stops entirely during testing with a 4790k OC 4.6ghz 1.250vcore setting.
The system specifications include H81i-plus mItx motherboard, Fractal Design Kelvin T12 AIO, an I7 4790k processor, HyperX Savage DDR3 2400MHz 16GB RAM, MSI GTX 970 4G, and a Corsair RM750x power supply. The computer restarts automatically when the OC CPU is set and the core voltage is adjusted to 1.250, preventing shutdowns at lower values like 1.225. This behavior often occurs in AIDA64, SinJulia, or Mandel, according to FPU test results. There seems to be a concern about AVX causing a significant temperature rise in seconds. The system shuts down suddenly and requires pressing the power button to restart. Although a different motherboard was used, the issue persists on the same board model, suggesting a possible VRM problem. The replacement of the old PSU with this one has resolved the problem. The CPU temperature rarely exceeds 75°C, typically staying under 60°C. Any assistance would be greatly appreciated. Thanks!
The H81 motherboard might not offer the same power delivery as the Z and B models, and it could have BIOS protection that turns off the system if power usage goes beyond a threshold...; the 4790K is also capable of consuming significant power.
Thank you for your answer, i think i have tried almost every option available in bios, although there is a tab I have not tried messing with.
Is there anyway i could turn this protection off? and would that fry my VRMS. I could buy a new mITX board, but the way i have customized my case caters to this board, and the big VRM heatsinks would prevent me from using one of my exhaust fans. Getting Gentle Typhoons in the mail soon aswell =)
Update the H81i-plus only had 4pin cpu power molex if thats relevant.
Ram is using a custom timing setup, everything remains at default settings but the problem persists. I'm about to test what you mentioned now.
I ran a blend test on prime 95 at 1.275vcore with AVX disabled—it didn't reach 80c. The computer shut down unexpectedly again. If Ram were using this setup, would I encounter other issues? Such as distorted graphics or blue screens? It seems unlikely to be a motherboard problem if we managed to pass a 1.5v and now it's failing...?
The cooling performance isn't bad considering it's an SFF case. The front features a radiator with push-pull intake, specifically the Noctua NF-F12. The top and side fans are outtake fans; the GPU handles most of the heat generation and effectively dissipates it. The fans included with the Kelvin T12 model are fractal design models. The PSU fan is oriented downward toward the motherboard, helping draw air out of the case as well. I've tested both configurations and still encountered the same issue.
I don't have a specific PSU make and model information. Could you provide more details or clarify your question?
Corsair RM750x PSU is in the top range, most of my requirements are covered except for RAM, I'm adding it now.
https://www.corsair.com/eu/en/Power/Plug...9020092-EU
Additional details if needed.