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High Vcore readings for my i7-9700k



I've just upgraded my PC. I have the Asus Prime Z370-A (BIOS 1002) and the i7-9700k with a Noctua NH-U12S cooler and 3200 mhz CL16 16GB RAM running Windows 10. I have mostly default BIOS options, with disabled Asus Multicore Enhancement, core voltage set to auto, etc. I am currently running no manual overclock, just the stock Intel turbo boosts.

The problem is I am getting what I see as abnormally high Vcore readings in multiple software monitors (HWInfo, HWMonitor, CPU-Z). Although the usual VCore appears to vary widely from 0.9 to 1.25 (and even that is a bit high for stock speeds compared to some OC setups I've seen), there are spikes to even ~1.45. This occurs during normal day-to-day loads (browsing, Twitch, downloading games etc), with CPU usage around 20-40% on average and not usually exceeding 80%. Temperatures seem to be normal though (45-58 C during normal non-gaming loads).

Should I upgrade the BIOS? (version 1002 is the first for the Asus Z370 series that supports Intel 9th gen and there are newer versions afaik) Should I set a manual voltage for stock speeds? Any other suggestions?


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Do update the BIOS and undervolt. Undervolt is the exact opposite of overclocking, which means it helps saves power through lower voltages

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1


Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: 1TB HP EX920 PCIe x4 M.2 SSD + 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172), 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally Monitor: 1080p 126Hz IPS G-sync


Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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