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OC on i3 8350k - Strix Z390-I Gamin

 
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post #1 of 7 (permalink) Old 03-14-2019, 04:30 PM - Thread Starter
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OC on i3 8350k - Strix Z390-I Gamin

Hello,

I'm trying to OC this Chips. I'd like to reach 5Ghz.
I would like some help to understand whats going on.
ATM, i'm trying a 4.5Ghz. OCCT won't pass ( CPU SDS, MDS, LDS but LINPACK OK ) if LLC is enabled ( level 5 or 6 over 7 )

Quote:
NAS i3 8350k - Strix Z390-I Gaming - 16 Go Corsair Vengeance RGB 3200 - Corsair H100i Platinium RGB
Quote:
Settings
Vcore Bios = 1.2
Frequence CPU = 4.5
LLC = auto
XMP2 = 3200

CPU Pwr Management
Intel SpeedStep = disabled
Intel Spee Shift = disabled
Turbo Mode = enabled
C-states = disabled
CFG Lock = disabled
Quote:
OCCT - SDS OK

Vcore


VID


CPU Temp
Quote:
For example, with my i7 8086k and Formula XI, the Vcore curve is very different

V-core


Temp CPU
According to the Vcore curve of the i3, i'd like to understand how to analyze it since its very different from the i7 and why LLC wont allow OCCT to pass the test.

Kind regards

Last edited by anonymousse37; 03-14-2019 at 04:43 PM.
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post #2 of 7 (permalink) Old 03-14-2019, 04:41 PM
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You just need to increase voltage and frequency until your cpu is too hot to cool or the vcore is getting too high. Looks like you could take another 10-15c in temperature on your cpu before its too hot. The llc seems to default to level 8 because vcore is increasing under cpu load. It won't pass on llc 7 because vcore will decrease under full cpu load at that setting.

CPU
Core I9-9900k @ 5.1
Motherboard
Asus Maximus XI Gene
GPU
EVGA 2080TI XC Black Edition
RAM
CMK16GX4M2K4700C19
Hard Drive
Samsung 970 Evo m.2 nvme
Power Supply
Silverstone SFX-L 800W
Cooling
280mm Slim + 360MM Thick
Case
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post #3 of 7 (permalink) Old 03-14-2019, 04:45 PM - Thread Starter
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LLC 8 is bad for 24/7 OC from what i heard since it tends to attenuate Vdroop which allows some overshoot on the vcore right ?
So indeed i might need to increase the Vcore so LLC get on lower levels to compensate the lack of Vcore.
BTW any idea whats a good Vcore for 4.8 or 5.0 on a i3 8350k ? Or where i can find this kind of data ?
What is the real problem of running a chip @ 1.35v 24/7 ? Its the Vcore itself or the hit that damage the chip ? If i delid the i3 i might get -15-20°.
Admiting i cant reach 5Ghz @ 1.35v 30-35 idle is this a problem for 24/7 OC ?

Last edited by anonymousse37; 03-14-2019 at 04:55 PM.
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post #4 of 7 (permalink) Old 03-14-2019, 05:03 PM
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I'm not familiar with that cpu. My 8700k needed 1.328v for 5.0ghz, 1.280v for 4.9ghz. Most people say that 1.42v is the highest voltage you can run daily on those chips.
according to this https://siliconlottery.com/pages/statistics , 41% of 8350k can not reach 5.0ghz. So you may have to settle for less.

CPU
Core I9-9900k @ 5.1
Motherboard
Asus Maximus XI Gene
GPU
EVGA 2080TI XC Black Edition
RAM
CMK16GX4M2K4700C19
Hard Drive
Samsung 970 Evo m.2 nvme
Power Supply
Silverstone SFX-L 800W
Cooling
280mm Slim + 360MM Thick
Case
Fractal Design Meshify S2
Operating System
Windows 10 64bit
Monitor
Acer XB271HU
Audio
Sennheiser HD 800s + Questyle CMA600i
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post #5 of 7 (permalink) Old 03-14-2019, 05:14 PM - Thread Starter
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R15, XTU, Realbench, OCCT linpack will pass 4.8 @ 1.29 but OCCT SDS, MDS, LDS wont pass, last vcore i tried was 1.32v.
Does it mean the OC is not stable if it cant pass SDS, MDS, LDS in OCCT ?
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post #6 of 7 (permalink) Old 03-14-2019, 05:25 PM
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Quote: Originally Posted by anonymousse37 View Post
R15, XTU, Realbench, OCCT linpack will pass 4.8 @ 1.29 but OCCT SDS, MDS, LDS wont pass, last vcore i tried was 1.32v.
Does it mean the OC is not stable if it cant pass SDS, MDS, LDS in OCCT ?
If it passes linpack and realbench it should be fine.

CPU
Core I9-9900k @ 5.1
Motherboard
Asus Maximus XI Gene
GPU
EVGA 2080TI XC Black Edition
RAM
CMK16GX4M2K4700C19
Hard Drive
Samsung 970 Evo m.2 nvme
Power Supply
Silverstone SFX-L 800W
Cooling
280mm Slim + 360MM Thick
Case
Fractal Design Meshify S2
Operating System
Windows 10 64bit
Monitor
Acer XB271HU
Audio
Sennheiser HD 800s + Questyle CMA600i
▲ hide details ▲
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post #7 of 7 (permalink) Old 03-14-2019, 05:51 PM - Thread Starter
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Here what i get with linpack, vcore curve is still trash tho

Quote:
NAS i3 8350k - Strix Z390-I Gaming - 16 Go Corsair Vengeance RGB 3200 - Corsair H100i Platinium RGB
Quote:
Settings
Vcore Bios = 1.28
Frequence CPU = 4.8
LLC = auto
XMP2 = 3200

CPU Pwr Management
Intel SpeedStep = disabled
Intel Spee Shift = disabled
Turbo Mode = enabled
C-states = disabled
CFG Lock = disabled
Quote:
OCCT - Linpack OK

Vcore


VID


CPU Temp
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