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How to increase CPU voltage?

Casey Woodruff
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So I want to change the voltage to my 4790k from my B43-G43 GAMING so I can increase my stability at higher frequencies. I've played with ring frequency (I understand I'm not hurting anything but I have no idea if I'm helping with stability). I'm pretty sure I'm on the wrong path with ring frequency though - just from what others have said.

 

Here's the meat of the question: which voltage option(s) do I modify? CPU core voltage? Do I also increase ring voltage? Voltage offset?

 

I'm not bluescreening or anything, just getting errors in WoW every now and again. I suspect a very small 8mV jump would probably do it but I'm not overly afraid to play around.

 

The purpose of this is to get better FPS in WoW and other games, because I've learned that the CPU is probably my FPS bottleneck (gtx 970 btw). Though even if I'm incorrect about that, I am enjoying myself and want those dank high temps. Before overclocking, I could never get my CPU over 70C. Which just seems...like a waste.

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You want to change core voltage, there can be a CPU voltage too but that would be the voltage going into the CPU that's then converted in the FIVR. Raising VCC_IN/CPU voltage can help when really pushing overclocks, to get my I7 4790K to 5GHz I'm running 1.35V vcore and 2V VCC_IN. 45x on ring and a little extra voltage of set for it. 

I spent $2500 on building my PC and all i do with it is play no games atm & watch anime at 1080p(finally) watch YT and write essays...  nothing, it just sits there collecting dust...

Builds:

The Toaster Project! Northern Bee!

 

The original LAN PC build log! (Old, dead and replaced by The Toaster Project & 5.0)

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"Here is some advice that might have gotten lost somewhere along the way in your life. 

 

#1. Treat others as you would like to be treated.

#2. It's best to keep your mouth shut; and appear to be stupid, rather than open it and remove all doubt.

#3. There is nothing "wrong" with being wrong. Learning from a mistake can be more valuable than not making one in the first place.

 

Follow these simple rules in life, and I promise you, things magically get easier. " - MageTank 31-10-2016

 

 

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VCC_IN = CPU voltage?

 

So let me get this straight. Voltage goes into CPU/VCC_IN which is then "spread" across the core as well as other components. Core Voltage allows higher frequencies. So Core Voltage is choked by VCC_IN and GHz is choked by "Core Voltage" also known as VCore.

 

Do I got that about right?

 

Also; thank you. I can only dream about your clock speeds.

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2 minutes ago, Casey Woodruff said:

VCC_IN = CPU voltage?

 

So let me get this straight. Voltage goes into CPU/VCC_IN which is then "spread" across the core as well as other components. Core Voltage allows higher frequencies. So Core Voltage is choked by VCC_IN and GHz is choked by "Core Voltage" also known as VCore.

 

Do I got that about right?

not totally correct, Vccin = CPU input voltage is what's sent to the FIVR (fully integrated voltage regulator I believe), which is responsible for stepping down voltage to your Vcore = CPU core voltage which feeds into the CPU core. Vcore is what limits your core frequency.

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: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside 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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Vccin fuels FIVR which chokes Vcore which chokes frequency.

 

Is the following statement correct in your opinion? "If any of these values is insufficient, a BSOD is the worst realistic consequence, outside of data loss from badness in data."

 

How about this one? "In theory, if Vcore were to be raised 100mV, best practice would be to raise Vccin by 100mV as well."

 

Do I got it about right? Not saying you said these things, just stating assumptions I'm making :)

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