[Full Log]External CMOS Reset Key Switch - Overclock.net

Jolly-Swagman · 10-21-08

Jolly Swagman's Mods

External CMOS Reset Key Switch

This Mod was performed on my CM-690 Case
NOTE - this mod pertains to a 2 pin clear CMOS jumper on some newer motherboards and other have 3 pin reset jumper

First obtain a Key switch, the one I am using for this Mod is a barrel type as shown in pic #1 # pic#2 below,

I have attached 2 wires 450mm in length soldered and shrink tubed to switch terminals and the other end has pin socket terminals to fit jumper pins.

Now find a suitable position for your switch, at the back of case see pic#3.
now seeing as I am going for the no drill hole in case method, I will be utilising the blank com port located just below the exhaust fan grill, see pic #4.

Now I have made a custom retainer for my switch using 3mm PVC material and drilled mounting hole for switch and mounting screws to coincide with the com port see pic #5

Now remove the Blank for com port (pic #4) and install mounting retainer to the inside of case and screw down.

Continued Post 2

Jolly-Swagman · 10-21-08

Continued

Now pop wires from switch through the hole replace retaining nut on switch and tighten firmly and secure wiring. see pic #6

Now we will test the switch using your trusty multimeter before connecting to the motherboard, so as that we have the Switch in the OFF or Normally Open position. see pic #7 & pics # 8-9

( The Sanwa Multimeter that I am using I have had for the past 32 years got for my 16th birthday )

Now I have placed a RED DOT below Switch to show position when switched to Normally Closed to Clear CMOS the you would switch back to Normally Open and remove Key. See pic #10

Continued Post 3

Jolly-Swagman · 10-21-08

Continued

Now we connect the switch leads to the the pins on the CLR CMOS jumper as indicated in pic #11 below.

And now we can put the case side on and hopefully when a need to reset the CMOS the case side wont have to be taken off just use of the CLR CMOS Key Switch as seen in pic #12 and swith to the RED DOT for a few seconds and the CMOS will be RESET.

And the finished Project Pic #13 #14

Hope this will be Useful to you as it has for me.

Jolly Swagman

k1t · 10-21-08

great guide! will be very useful for people who oc a lot and hate to open up the case

+rep!

SerenityKill3r · 10-21-08

I'd love one of these, my main rig has a reset switch on the IO of the motherboard though

Indignity · 10-21-08

Yours is much cleaner.. nice work

**coffeejunky** · 10-21-08

Nice work. +REP. I was just thinking of doing this.
Do you have to have a 3 pole switch when using a mobo that has three pins for the jumper? As mine is that way. Or can you just used the two 'reset' pins. I'm fairly sure the 3rd pin is redundant, but can't be 100% certain.

CattleRustler · 10-21-08

this is cool
if I was an overclocker, and my mobo didnt have an external cmos reset in the rear i/o, I'd definitely do something like this, but using a pushbutton or toggle rather than a keyed switch.

I like the no-drilling-the-case aspect as well
good job + rep

Jolly-Swagman · 10-21-08

Quote:

Originally Posted by k1t

great guide! will be very useful for people who oc a lot and hate to open up the case

+rep!

Thanks for the comments and the +Rep

Quote:

Originally Posted by SerenityKill3r

I'd love one of these, my main rig has a reset switch on the IO of the motherboard though

Yes Have seen that some of the newer M/B's now come with a reset on the I/O panel,

Quote:

Originally Posted by coffeejunky

Nice work. +REP. I was just thinking of doing this.
Do you have to have a 3 pole switch when using a mobo that has three pins for the jumper? As mine is that way. Or can you just used the two 'reset' pins. I'm fairly sure the 3rd pin is redundant, but can't be 100% certain.

Thanks also for the +Rep
Indignity has a diagram in his post that shows a 3 pole switch set-up

Quote:

Originally Posted by Indignity

Yours is much cleaner.. nice work

Thanks also for the +Rep and comments.

Quote:

Originally Posted by CattleRustler

this is cool
if I was an overclocker, and my mobo didnt have an external cmos reset in the rear i/o, I'd definitely do something like this, but using a pushbutton or toggle rather than a keyed switch.

I like the no-drilling-the-case aspect as well
good job + rep

Thanks for the +Rep and comments,

When I did this Mod, the very first thing that came to mind was a No Drill approach

You can get Latch locking toggle switches also, just makes it a little safer from accidentally knocking Reset Switch, when you dont need to,
and we all know what kinds of trouble that can bring.

Jolly-Swagman · 11-04-08

Here is another Type of toggle switch called a latching lock-type that cannot be accidentally switched.

You have to pull switch slightly outward in order to get over the latch (up and over so to say) in order to change switch position

And also can be used for 2pin or 3pin CMOS reset

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[Full Log]External CMOS Reset Key Switch

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