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i6 8600k undervolt help

Mahbub
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My i5 8600k voltage in bios by default was at 1.185v.. with it i ran stress test and the speed was constant at 4100mhz.. i undervolted it to 1.075v and ran stress test again.. again all was fine the cpu ran constantly at 4100 mhz, but now the general pc seems more stuttery .. why? I mean if its running stress test properly mentaining 4100 mhz constant in stress test after undervolting. Why general pc use feels stuttery? 

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https://linustechtips.com/topic/1207799-i6-8600k-undervolt-help/
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Just now, Mahbub said:

but now the general pc seems more stuttery .. why

Probably a unstable oc 

It could be the mobo cpu or even the PSU we can't know for sure 

1.18 is a really good vcore for the 8600k just leave it at that 

PC: Motherboard: ASUS B550M TUF-Plus, CPU: Ryzen 3 3100, CPU Cooler: Arctic Freezer 34, GPU: GIGABYTE WindForce GTX1650S, RAM: HyperX Fury RGB 2x8GB 3200 CL16, Case, CoolerMaster MB311L ARGB, Boot Drive: 250GB MX500, Game Drive: WD Blue 1TB 7200RPM HDD.

 

Peripherals: GK61 (Optical Gateron Red) with Mistel White/Orange keycaps, Logitech G102 (Purple), BitWit Ensemble Grey Deskpad. 

 

Audio: Logitech G432, Moondrop Starfield, Mic: Razer Siren Mini (White).

 

Phone: Pixel 3a (Purple-ish).

 

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1 minute ago, TofuHaroto said:

Probably a unstable oc 

It could be the mobo cpu or even the PSU we can't know for sure 

1.18 is a really good vcore for the 8600k just leave it at that 

Its reaching 75 degrees so just wanted it to run a bit cooler.. but anyway well i guess I will just reset it to default..

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1 minute ago, Mahbub said:

Its reaching 75 degrees so just wanted it to run a bit cooler.. but anyway well i guess I will just reset it to default..

75 c is really good

Nothing wrong with that 

PC: Motherboard: ASUS B550M TUF-Plus, CPU: Ryzen 3 3100, CPU Cooler: Arctic Freezer 34, GPU: GIGABYTE WindForce GTX1650S, RAM: HyperX Fury RGB 2x8GB 3200 CL16, Case, CoolerMaster MB311L ARGB, Boot Drive: 250GB MX500, Game Drive: WD Blue 1TB 7200RPM HDD.

 

Peripherals: GK61 (Optical Gateron Red) with Mistel White/Orange keycaps, Logitech G102 (Purple), BitWit Ensemble Grey Deskpad. 

 

Audio: Logitech G432, Moondrop Starfield, Mic: Razer Siren Mini (White).

 

Phone: Pixel 3a (Purple-ish).

 

Build Log: 

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2 minutes ago, TofuHaroto said:

75 c is really good

Nothing wrong with that 

Ok thanks.. btw i increased the volt by .10.. i mean instead of 1.075 to 1.085 (instead of stick 1.185) and now the stutter seems to have gone.. all is like it was before 

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3 minutes ago, Mahbub said:

Ok thanks.. btw i increased the volt by .10.. i mean instead of 1.075 to 1.085 (instead of stick 1.185) and now the stutter seems to have gone.. all is like it was before 

Just because the all core boost is stable with your under volt settings, does not mean that you are fully stable.

 

The CPU has MANY different performance states, any of which can become unstable because of a negative offset under volt.

BabyBlu.2 (Primary): 

  • CPU: AMD Ryzen 5 9600X
  • Motherboard: Asus ROG STRIX B650E-F
  • RAM: G.Skill Flare X5 64GB (2x32GB) DDR5-6000 CL30 @ 6400MHz 30-40-40-96
  • GPU: MSI RTX 2080 Sea Hawk EK X, 2100MHz core, 8000MHz mem
  • Case: Phanteks Evolv X
  • Storage: XPG SX8200 Pro 2TB, 3x ADATASU800 1TB (RAID 0), Samsung 970 EVO Plus 500GB
  • PSU: Corsair HX1000i
  • Display: MSI MPG341CQR 34" 3440x1440 144Hz Freesync, Dell S2417DG 24" 2560x1440 165Hz Gsync
  • Cooling: Custom water loop (CPU & GPU), Radiators: 1x140mm(Back), 1x280mm(Top), 1x420mm(Front)
  • Keyboard: Corsair Strafe RGB (Cherry MX Brown)
  • Mouse: MasterMouse MM710
  • Headset: Corsair Void Pro RGB
  • OS: Windows 11 Pro

Roxanne (Wife Build):

  • CPU: AMD Ryzen 5 7600
  • Motherboard: Gigabyte B650I AORUS ULTRA
  • RAM: G.Skill Flare X5 32GB (2x16GB) DDR5-6000 @ 6000MHz 30-38-38-96
  • GPU: EVGA GTX 1080 FTW2 w/ LM
  • Case: Cooler Master MasterBox NR200
  • Storage: Samsung 850 EVO 250GB, Samsung 860 EVO 1TB, Silicon Power A80 2TB NVME
  • PSU: Corsair SF850L
  • Display: Dell Alienware AW3420DW GSync
  • Cooling: Arctic Liquid Freezer II 280mm
  • Keyboard: GMMK TKL(Kailh Box White)
  • Mouse: Glorious Model O-
  • Headset: SteelSeries Arctis 7
  • OS: Windows 11 Pro

BigBox (HTPC):

  • CPU: Ryzen 5800X3D
  • Motherboard: Gigabyte B550i Aorus Pro AX
  • RAM: Corsair Vengeance LPX 2x8GB DDR4-3600 @ 3600MHz 14-14-14-28
  • GPU: MSI RTX 3080 Ventus 3X Plus OC, de-shrouded, LM TIM, replaced mem therm pads
  • Case: Fractal Design Node 202
  • Storage: SP A80 1TB, WD Black SN770 2TB
  • PSU: Corsair SF600 Gold w/ NF-A9x14
  • Display: Samsung QN90A 65" (QLED, 4K, 120Hz, HDR, VRR)
  • Cooling: Thermalright AXP-100 Copper w/ NF-A12x15
  • Keyboard/Mouse: Rii i4
  • Controllers: 4X Xbox One & 2X N64 (with USB)
  • Sound: Denon AVR S760H with 5.1.2 Atmos setup.
  • OS: Windows 11 Pro

Harmonic (NAS/Game/Plex/Other Server):

  • CPU: Intel Core i7 6700
  • Motherboard: ASRock FATAL1TY H270M
  • RAM: 64GB DDR4-2133
  • GPU: Intel HD Graphics 530
  • Case: Fractal Design Define 7
  • HDD: 3X Seagate Exos X16 14TB in RAID 5
  • SSD: Inland Premium 512GB NVME, Sabrent 1TB NVME
  • Optical: BDXL WH14NS40 flashed to WH16NS60
  • PSU: Corsair CX450
  • Display: None
  • Cooling: Noctua NH-U14S
  • Keyboard/Mouse: None
  • 2.5Gb NIC
  • OS: Windows 10 Pro

NAS:

  • Synology DS216J
  • 2x8TB WD Red NAS HDDs in RAID 1. 8TB usable space
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3 minutes ago, HairlessMonkeyBoy said:

Just because the all core boost is stable with your under volt settings, does not mean that you are fully stable.

 

The CPU has MANY different performance states, any of which can become unstable because of a negative offset under volt.

Ok thanks. New to this undervolting thing.. so learning

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Just now, Mahbub said:

so learning

Aren't we all! 😁

 

I did some under-volting on the i7 6700 in my HTPC a while back and ran into the same problem as you. I think I ended up around -.10 like you.

BabyBlu.2 (Primary): 

  • CPU: AMD Ryzen 5 9600X
  • Motherboard: Asus ROG STRIX B650E-F
  • RAM: G.Skill Flare X5 64GB (2x32GB) DDR5-6000 CL30 @ 6400MHz 30-40-40-96
  • GPU: MSI RTX 2080 Sea Hawk EK X, 2100MHz core, 8000MHz mem
  • Case: Phanteks Evolv X
  • Storage: XPG SX8200 Pro 2TB, 3x ADATASU800 1TB (RAID 0), Samsung 970 EVO Plus 500GB
  • PSU: Corsair HX1000i
  • Display: MSI MPG341CQR 34" 3440x1440 144Hz Freesync, Dell S2417DG 24" 2560x1440 165Hz Gsync
  • Cooling: Custom water loop (CPU & GPU), Radiators: 1x140mm(Back), 1x280mm(Top), 1x420mm(Front)
  • Keyboard: Corsair Strafe RGB (Cherry MX Brown)
  • Mouse: MasterMouse MM710
  • Headset: Corsair Void Pro RGB
  • OS: Windows 11 Pro

Roxanne (Wife Build):

  • CPU: AMD Ryzen 5 7600
  • Motherboard: Gigabyte B650I AORUS ULTRA
  • RAM: G.Skill Flare X5 32GB (2x16GB) DDR5-6000 @ 6000MHz 30-38-38-96
  • GPU: EVGA GTX 1080 FTW2 w/ LM
  • Case: Cooler Master MasterBox NR200
  • Storage: Samsung 850 EVO 250GB, Samsung 860 EVO 1TB, Silicon Power A80 2TB NVME
  • PSU: Corsair SF850L
  • Display: Dell Alienware AW3420DW GSync
  • Cooling: Arctic Liquid Freezer II 280mm
  • Keyboard: GMMK TKL(Kailh Box White)
  • Mouse: Glorious Model O-
  • Headset: SteelSeries Arctis 7
  • OS: Windows 11 Pro

BigBox (HTPC):

  • CPU: Ryzen 5800X3D
  • Motherboard: Gigabyte B550i Aorus Pro AX
  • RAM: Corsair Vengeance LPX 2x8GB DDR4-3600 @ 3600MHz 14-14-14-28
  • GPU: MSI RTX 3080 Ventus 3X Plus OC, de-shrouded, LM TIM, replaced mem therm pads
  • Case: Fractal Design Node 202
  • Storage: SP A80 1TB, WD Black SN770 2TB
  • PSU: Corsair SF600 Gold w/ NF-A9x14
  • Display: Samsung QN90A 65" (QLED, 4K, 120Hz, HDR, VRR)
  • Cooling: Thermalright AXP-100 Copper w/ NF-A12x15
  • Keyboard/Mouse: Rii i4
  • Controllers: 4X Xbox One & 2X N64 (with USB)
  • Sound: Denon AVR S760H with 5.1.2 Atmos setup.
  • OS: Windows 11 Pro

Harmonic (NAS/Game/Plex/Other Server):

  • CPU: Intel Core i7 6700
  • Motherboard: ASRock FATAL1TY H270M
  • RAM: 64GB DDR4-2133
  • GPU: Intel HD Graphics 530
  • Case: Fractal Design Define 7
  • HDD: 3X Seagate Exos X16 14TB in RAID 5
  • SSD: Inland Premium 512GB NVME, Sabrent 1TB NVME
  • Optical: BDXL WH14NS40 flashed to WH16NS60
  • PSU: Corsair CX450
  • Display: None
  • Cooling: Noctua NH-U14S
  • Keyboard/Mouse: None
  • 2.5Gb NIC
  • OS: Windows 10 Pro

NAS:

  • Synology DS216J
  • 2x8TB WD Red NAS HDDs in RAID 1. 8TB usable space
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5 minutes ago, HairlessMonkeyBoy said:

Aren't we all! 😁

 

I did some under-volting on the i7 6700 in my HTPC a while back and ran into the same problem as you. I think I ended up around -.10 like you.

Haha .  My stock is 1.185v.. i planned to keep at 1 volt.. windows didnt boot atall lol.. the least at which windows is booting is 1.075v.. but stutter so i decided to keep at 1.085v.. but then stutter.. so finally the least voltage where it seems to not effect general usage n not have stutter is 1.1v (0.085v less then stock)

 

Correction...naah still stuttering a bit..  i quit lol.. m just gonna leave voltage at the stock value lol

Edited by Mahbub
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