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CPU Power Limit

aezakmi
By aezakmi
in CPUs, Motherboards, and Memory
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Hi, I was checking BIOS Stuff when I saw these Power Limit settings for my CPU, clicking on Help while the option is selected only shows the word "Watts" and there's nothing on the manual, there are 4 (I assume one for each core) and all set to Auto (91), going into AIDA64 during a OCCT test shows the "CPU Package" uses up to 70W and the "CPU IA Cores" another 70W, approx.

My question here is: Should I set the limits manually to around 140 considering my CPU is overclocked?

 

i3-8350k: VAXG, VT-d, and Turbo are disabled, Core Enhancement enabled, and I'm using 1.280V on "High" LLC to get 4.8GHz, AVX Off 0 (I don't use P95), No voltage offsets.

ASUS X470-PRO • R7 1700 4GHz • Corsair H110i GT P/P • 2x MSI RX 480 8G • Corsair DP 2x8 @3466 • EVGA 750 G2 • Corsair 730T • Crucial MX500 250GB • WD 4TB

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It wouldn't hurt to set the power limit higher. Just in case the motherboard wants to throttle. Though if your clockspeed as reported on a reliable program like HWInfo is stable during very high-power stress tests like AIDA64's FPU, there might be no need.

We have a NEW and GLORIOUSER-ER-ER PSU Tier List Now. (dammit @LukeSavenije stop coming up with new ones)

You can check out the old one that gave joy to so many across the land here

 

Computer having a hard time powering on? Troubleshoot it with this guide. (Currently looking for suggestions to update it into the context of <current year> and make it its own thread)

Computer Specs:

Spoiler

Mathresolvermajig: Intel Xeon E3 1240 (Sandy Bridge i7 equivalent)

Chillinmachine: Noctua NH-C14S
Framepainting-inator: EVGA GTX 1080 Ti SC2 Hybrid

Attachcorethingy: Gigabyte H61M-S2V-B3

Infoholdstick: Corsair 2x4GB DDR3 1333

Computerarmor: Silverstone RL06 "Lookalike"

Rememberdoogle: 1TB HDD + 120GB TR150 + 240 SSD Plus + 1TB MX500

AdditionalPylons: Phanteks AMP! 550W (based on Seasonic GX-550)

Letterpad: Rosewill Apollo 9100 (Cherry MX Red)

Buttonrodent: Razer Viper Mini + Huion H430P drawing Tablet

Auralnterface: Sennheiser HD 6xx

Liquidrectangles: LG 27UK850-W 4K HDR

 

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2 minutes ago, Energycore said:

It wouldn't hurt to set the power limit higher. Just in case the motherboard wants to throttle. Though if your clockspeed as reported on a reliable program like HWInfo is stable during very high-power stress tests like AIDA64's FPU, there might be no need.

About that. I had BIOS version F3 which came with the mobo and the FSB was 99.7 (4.785MHz) instead of 100, but yesterday I flashed it to F6, now the FSB is 100 and the CPU speed is 4800, it might go down to 4799 during OCCT or AIDA test, idk if that's bad

ASUS X470-PRO • R7 1700 4GHz • Corsair H110i GT P/P • 2x MSI RX 480 8G • Corsair DP 2x8 @3466 • EVGA 750 G2 • Corsair 730T • Crucial MX500 250GB • WD 4TB

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2 minutes ago, aezakmi said:

About that. I had BIOS version F3 which came with the mobo and the FSB was 99.7 (4.785MHz) instead of 100, but yesterday I flashed it to F6, now the FSB is 100 and the CPU speed is 4800, it might go down to 4799 during OCCT or AIDA test, idk if that's bad

The FSB clock almost always isn't 100. On every motherboard I've worked on it's between 99.5 and 100.

We have a NEW and GLORIOUSER-ER-ER PSU Tier List Now. (dammit @LukeSavenije stop coming up with new ones)

You can check out the old one that gave joy to so many across the land here

 

Computer having a hard time powering on? Troubleshoot it with this guide. (Currently looking for suggestions to update it into the context of <current year> and make it its own thread)

Computer Specs:

Spoiler

Mathresolvermajig: Intel Xeon E3 1240 (Sandy Bridge i7 equivalent)

Chillinmachine: Noctua NH-C14S
Framepainting-inator: EVGA GTX 1080 Ti SC2 Hybrid

Attachcorethingy: Gigabyte H61M-S2V-B3

Infoholdstick: Corsair 2x4GB DDR3 1333

Computerarmor: Silverstone RL06 "Lookalike"

Rememberdoogle: 1TB HDD + 120GB TR150 + 240 SSD Plus + 1TB MX500

AdditionalPylons: Phanteks AMP! 550W (based on Seasonic GX-550)

Letterpad: Rosewill Apollo 9100 (Cherry MX Red)

Buttonrodent: Razer Viper Mini + Huion H430P drawing Tablet

Auralnterface: Sennheiser HD 6xx

Liquidrectangles: LG 27UK850-W 4K HDR

 

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31 minutes ago, aezakmi said:

About that. I had BIOS version F3 which came with the mobo and the FSB was 99.7 (4.785MHz) instead of 100, but yesterday I flashed it to F6, now the FSB is 100 and the CPU speed is 4800, it might go down to 4799 during OCCT or AIDA test, idk if that's bad

That's 'Spread spectrum' function working. Not sure what it's used for, but it does cause the FSB/BCLK to fluctuate a bit at all times. I turned it off and didnt find any problems so far.

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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1 hour ago, Jurrunio said:

That's 'Spread spectrum' function working. Not sure what it's used for, but it does cause the FSB/BCLK to fluctuate a bit at all times. I turned it off and didnt find any problems so far.

The bad thing is that I can't turn that option off, in all of my previous boards I was able to disable it to keep my overclock stable, well, at least now it only drops the CPU freq by 1 MHz

ASUS X470-PRO • R7 1700 4GHz • Corsair H110i GT P/P • 2x MSI RX 480 8G • Corsair DP 2x8 @3466 • EVGA 750 G2 • Corsair 730T • Crucial MX500 250GB • WD 4TB

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