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Epimetheus

Low i5 9400F boost clock on all cores

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Posted · Original PosterOP

Hi guys, i have an i5 9400f paired with an asus prime h310m-k motherboard (i know, terrible motherboard, poor choices, just know that formerly there was a pentium g5400).

Since i was stuck on this platform and didn't want to spend on a new motherboard, i chose to simply upgrade to a low power i5. However, i just noticed that the maximum my processor boosts at with all 6 cores is 3,7 ghz - while it usually should boost at 3,9 ghz all cores. What could the problem be? My guess is the trash power delivery on this motherboard is kinda holding it back. What do you guys think? 

 

If you need more informations my build is listed in my profile

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The trashy board can't properly power it, hence a limit is enforced. 

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your motherboard is bottlenecking the CPU in someway, power throttling or VRM's choking something of the sorts... there's nothing you can do tbh


Workstation Rig:
CPU:  Intel Core i9 9900K @5.0ghz  |~| Cooling: beQuiet! Dark Rock 4 |~|  MOBO: Asus Z390M ROG Maximus XI GENE |~| RAM: 32gb 3333mhz CL15 G.Skill Trident Z RGB |~| GPU: nVidia TITAN V  |~| PSU: beQuiet! Dark Power Pro 11 80Plus Platinum  |~| Boot: Intel 660p 2TB NVMe |~| Storage: 2X4TB HDD 7200rpm Seagate Iron Wolf + 2X2TB SSD SanDisk Ultra |~| Case: Cooler Master Case Pro 3 |~| Display: Acer Predator X34 3440x1440p100hz |~| OS: Windows 10 Pro.
 
Personal Use Rig:
CPU: Intel Core i9 9900 @4.75ghz |~| Cooling: beQuiet! Shadow Rock Slim |~| MOBO: Gigabyte Z390M Gaming mATX|~| RAM: 16gb DDR4 3400mhzCL15 Crucial Ballistix |~| GPU: nVidia Founders Edition RTX 2080 Ti |~| PSU: beQuiet! Straight Power 11 80Plus Gold  |~|  Boot:  Intel 660p 2TB NVMe |~| Storage: 2x2TB SanDisk SSD Ultra 3D |~| Case: Cooler Master Case Pro 3 |~| Display: Viotek GN34CB 3440x1440p100hz |~| OS: Windows 10 Pro.


HTPC / "Console of the house":

CPU: Intel Core i7 8700 @4.45ghz |~| Cooling: Cooler Master Hyper 212X |~| MOBO: Gigabyte Z370M D3H mATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: nVidia Founders Edition GTX 1080 Ti |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.
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It's not strange, you put a hexacore on a motherboard made for dual cores...


Workstation Rig:
CPU:  Intel Core i9 9900K @5.0ghz  |~| Cooling: beQuiet! Dark Rock 4 |~|  MOBO: Asus Z390M ROG Maximus XI GENE |~| RAM: 32gb 3333mhz CL15 G.Skill Trident Z RGB |~| GPU: nVidia TITAN V  |~| PSU: beQuiet! Dark Power Pro 11 80Plus Platinum  |~| Boot: Intel 660p 2TB NVMe |~| Storage: 2X4TB HDD 7200rpm Seagate Iron Wolf + 2X2TB SSD SanDisk Ultra |~| Case: Cooler Master Case Pro 3 |~| Display: Acer Predator X34 3440x1440p100hz |~| OS: Windows 10 Pro.
 
Personal Use Rig:
CPU: Intel Core i9 9900 @4.75ghz |~| Cooling: beQuiet! Shadow Rock Slim |~| MOBO: Gigabyte Z390M Gaming mATX|~| RAM: 16gb DDR4 3400mhzCL15 Crucial Ballistix |~| GPU: nVidia Founders Edition RTX 2080 Ti |~| PSU: beQuiet! Straight Power 11 80Plus Gold  |~|  Boot:  Intel 660p 2TB NVMe |~| Storage: 2x2TB SanDisk SSD Ultra 3D |~| Case: Cooler Master Case Pro 3 |~| Display: Viotek GN34CB 3440x1440p100hz |~| OS: Windows 10 Pro.


HTPC / "Console of the house":

CPU: Intel Core i7 8700 @4.45ghz |~| Cooling: Cooler Master Hyper 212X |~| MOBO: Gigabyte Z370M D3H mATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: nVidia Founders Edition GTX 1080 Ti |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.
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Posted · Original PosterOP
Just now, Princess Luna said:

It's not strange, you put a hexacore on a motherboard made for dual cores...

I mean, it's not strange in the sense i shouldn't expect it but strange in the sense that it doesn't perform as it should

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Blow the motherboard (which means taking out the side panel of the case) with a desk fan at max speed, it can help.


"What's under the heatsink?" ep1, "Why it's not as good as it seem?" AMD fanboy edition out, episode 2 "Why my gaming board is a scam?" Intel fanboy edition coming soon (this is a link)

Hardware specs below

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.4?V 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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Run HWiNFO and when your CPU is throttling, have a look at the reason why.  The 9400F has a default TDP of 65 Watts.  By default, the long term turbo power limit is usually set equal to the TDP rating.  When your CPU reaches 65 Watts, it will throttle and slow down to prevent exceeding this limit.  Check your bios to see if you can increase the turbo power limits or try using Intel XTU.

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Posted · Original PosterOP
48 minutes ago, unclewebb said:

Run HWiNFO and when your CPU is throttling, have a look at the reason why.  The 9400F has a default TDP of 65 Watts.  By default, the long term turbo power limit is usually set equal to the TDP rating.  When your CPU reaches 65 Watts, it will throttle and slow down to prevent exceeding this limit.  Check your bios to see if you can increase the turbo power limits or try using Intel XTU.

isn't the tdp of intel cpus relative to the base clock (which in this case is 2,9 ghz)?

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https://ark.intel.com/content/www/us/en/ark/products/190883/intel-core-i5-9400f-processor-9m-cache-up-to-4-10-ghz.html

 

Intel lists the TDP as 65 Watts for the 9400F.  By default, this is what the long term turbo boost limit will be set to.  Check your bios.  This setting controls the speed of your CPU when it is fully loaded.  Run monitoring software like HWiNFO, check to see what throttling flag is being set and what power consumption is being reported. 

 

All Intel CPUs use this same control method.  When overclocking an unlocked CPU, these power limits are automatically set sky high by the bios so they do not interfere with the CPU speed.  On a locked CPU, you might have to manually set the turbo power limits higher.  If the bios does not have this option then you need to try using software to access the power limits.

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