Is it possible to do this?

A10Pilot3 · Post by **A10Pilot3** » Sun Sep 26, 2004 9:46 pm

Is there anyway I can take off the lower limit on my Abit IC7 so I can underclock past 100MHz FSB?

infinitevalence · Post by **infinitevalence** » Mon Sep 27, 2004 9:20 am

You can look for a bios hack that will let you but i would guess that over all your answeris no.

Post by **Apoptosis** » Mon Sep 27, 2004 10:03 am

why would you want to go below 100MHz?

A10Pilot3 · Post by **A10Pilot3** » Mon Sep 27, 2004 4:36 pm

Apoptosis wrote:why would you want to go below 100MHz?

Honestly I dont really know....

j/k

I'm trying to underclock as far as possible so I dont need to run any fans in my case, I'm not really gaming at all during this time of year, I will be busy working in the fields soon, and I will only need the computer for e-mail and simple tasks like that. I have it at 1.5GHz and 100MHz RAM right now, and it's still plenty fast. After about an hour though, it gets too hot and the alarm goes off.

infinitevalence · Post by **infinitevalence** » Mon Sep 27, 2004 4:43 pm

run your fans at 7v rather than 12 and you will never hear them, that should give you enough air flow and make it quite.

(12v-5v=7v) if you were wondering

A10Pilot3 · Post by **A10Pilot3** » Thu Sep 30, 2004 3:01 pm

infinitevalence wrote:run your fans at 7v rather than 12 and you will never hear them, that should give you enough air flow and make it quite.

(12v-5v=7v) if you were wondering

Thanks, I can do math

how do I make them run at 7V though?

eric m. · Post by **eric m.** » Thu Sep 30, 2004 3:55 pm

get a cheap fan controller or put a resistor in line with the 12v DC. since you said you can do math i will let you figure out what resistance you need to drop it down to 7 volts.

but i would get a fan controller (or potentiometer) anyway since it lets you adjust it for max speed with the quietest cooling.

Immortal · Post by **Immortal** » Fri Oct 01, 2004 6:45 am

V=IR

So re-arrange it and u get, R=V/I

Use that formula, V= Voltage, I=current, and R = resistance.
Ur current rating will be shown on the fan.

Post by **Apoptosis** » Fri Oct 01, 2004 7:11 am

all you gotta do is flip the wires on your MOLEX connectors and you can get your fans to run 7V.

How to do it:
Fan connector red goes to PSU connector yellow
Fan connector black goes to PSU connector red
12 Volts - 5 Volts = 7 Volts.

T-Shirt · Post by **T-Shirt** » Fri Oct 01, 2004 7:35 am

But be really careful never to use the Modded molex for anything but fans, Hard drive do not like 7 volts

infinitevalence · Post by **infinitevalence** » Fri Oct 01, 2004 12:28 pm

A10Pilot3 wrote:
infinitevalence wrote:run your fans at 7v rather than 12 and you will never hear them, that should give you enough air flow and make it quite.

(12v-5v=7v) if you were wondering
Thanks, I can do math

how do I make them run at 7V though?

Seems that you do have a math problem when it comes to understanding electricity. if you use the 12v line for power and the 5v line as ground the difference in potental is 7v.

Immortal · Post by **Immortal** » Fri Oct 01, 2004 1:12 pm

or he can use a correct value resistor.....

infinitevalence · Post by **infinitevalence** » Fri Oct 01, 2004 1:26 pm

but that costs $$ and takes some cuting and soldering ablity. To swap the ground to the 5v line all you have to do is push the ground pin out on the fan connector and slide it into the 5v spot on the plug.

A10Pilot3 · Post by **A10Pilot3** » Fri Oct 01, 2004 9:03 pm

infinitevalence wrote:
A10Pilot3 wrote:
infinitevalence wrote:run your fans at 7v rather than 12 and you will never hear them, that should give you enough air flow and make it quite.

(12v-5v=7v) if you were wondering
Thanks, I can do math

how do I make them run at 7V though?
Seems that you do have a math problem when it comes to understanding electricity. if you use the 12v line for power and the 5v line as ground the difference in potental is 7v.

When I said I could do math, I was referring to the 12 -5 = 7

silly people. I'll work on it and see what I can come up with. Thanks for the help