Jump to content
Search In
  • More options...
Find results that contain...
Find results in...

Can I use a USB cable to clear CMOS?

Recommended Posts

Why would you do that?


Unplug computer from mains (so that 5v standby of your power supply which is always on) and either use the reset cmos jumper (short it or change setting for a few seconds) or press reset cmos button if there is any, or remove the battery for around 20-30 seconds then put it back in.



Link to post
Share on other sites

Anything that can conduct electricity will do. USB cable, screwdriver, bolt, anything.

"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 4745MHz 1.408V (software) --> 1.4?V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.2MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2200MHz 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

Link to post
Share on other sites
6 minutes ago, Jurrunio said:

Anything that can conduct electricity will do. USB cable, screwdriver, bolt, anything.

oh i assumed they meant clear CMOS via USB!!! silly me :s

Link to post
Share on other sites

Yeah, back in the old days, motherboards used to come with a clear CMOS shorting jumper, usually attached to 1 of the two pins to be bridged. Then I think they started saving money and not shipping jumpers anymore. Gotta save those 20 cents those jumpers cost !!

Link to post
Share on other sites

It wasn't necessarily saving cost, a jumper is less than 1 cent (here's an example , 0.0041$ each if you buy 500 - 2.05$ for 500 jumpers) ... 


Some stupid guy in an office came up with "jumper-free motherboard" , "all digital motherboard" , "100% bios configurable motherboard", claims like these... so you couldn't have the "jumper free" claim while having a jumper for the reset cmos on the motherboard... they just left the pins there and told you to either short the pins with a flat head screwdriver for a few seconds, or to remove the battery for a few seconds (while power cable is unplugged because otherwise power supply will keep powering the chip).


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now