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  #1  
Old 01-08-2019, 05:48 PM
hrngrd hrngrd is offline
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POST ID # = 988880
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Default iCUE prevents i9 9900K turbo boost

Hi,

I'm experiencing this wierd issue on my freshly installed PC:
When iCUE is running, none of my i9 9900K's 8 cores will ever boost above 4700Mhz, but immediately after closing iCUE the cores start reaching their full boost potential of 5000mhz. Starting iCUE again drops the max boost to 4700Mhz again.

Cinebench scores are affected both on single cores and full CPU scores.

My case fans (3xML140 RGB) are connected to Corsair commander. The AIO fans are connected to the H115i pump. (both RGB and fan headers)

Cinebench R15 without iCUE running
Single Core Score: 213
Full CPU Score: 2027

Cinebench R15 with iCUE running:
Single Core Score: 199
Full CPU Score: 1864

Any ideas?

Software:
Windows 10 v17763
iCUE v3.10.125
CPUID HWMonitor v1.38.0

Specs:

i9 9900K @Stock speed
4x8GB G.Skill TridentZ RGB @3200Mhz CL16
Gigabyte Z390 Aorus Master (BIOS F8B)
Gigabyte Geforce RTX 2080 Ti Xtreme
Samsung 970 EVO 1TB NVME M.2
Corsair HX850x (2018) PSU
Corsair Hydro Series 115i RGB Platinum with 2x Corsair ML140 RGB fans (FW v.1.00.33)
3x Corsair ML140 RGB Fans
Corsair Commander (FW v.0.8.210)
Fractal Design Define S2
Asus Swift PG279Q 27" G-Sync Monitor
Corsair K70 RGB keyboard
Mionix Castor Mouse
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  #2  
Old 01-09-2019, 10:07 AM
solarity solarity is offline
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Location: Rochester, NY
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POST ID # = 988972
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Default

Thank you for providing a lot of information. Do you have any custom settings in the UEFI or are we talking everything stock?

I have a 9900K and a Z370 Gaming 7. I am curious if I can replicate the issue. I think I recall not seeing my CPU boost to 5Ghz stock, though I OC'ed it to 5Ghz in the UEFI. No AVX Offset.

My first thought is there might be AVX offset of -3, though I don't think iCUE would use AVX. I don't use Cinebench to stress test, though from what little I just Googled, Cinebench doesn't look like it leverages AVX.

Lastly I can confirm closing as many tools and applications appears to boost your score in cinebench.
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  #3  
Old 01-09-2019, 10:34 AM
hrngrd hrngrd is offline
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Default

BIOS settings are completely clean "Load optimized defaults" and stock except using XMP settings on the memory, no AVX offsets, and Multi-Core Enhancements remain at the default "Auto" (not enabled, which boosts all cores to 5Ghz more or less permanently)
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