BobbyEwing
10-11-01, 06:13 PM
A few weeks ago I posted about my ducting from the side moundted 120mm to the SK6 HS and removal of the delta. That reduced noise to a great extent, by I oculdn't keep my fingers from going in again.
This time I wanted to be able to switch from low to high fan speed. Not wanting to shell out cash for rheostats and the like I felt that beeing able to switch between 7 and 12 V would be sufficient for my needs. All I bought was 3 3-way flip switches. I wired the fans with 12V from the rail to the positive, then wired the negative to the middle connection of a switch. The two outer connectors on the switch was connected to 5v and 0v. In effect this gave me three options for each fan: High effect (12v), low effect (7v) and off. The switches was then mounted in a standard slotcover.
The entire proces took me about two hours, including drilling holes, and soldering everything together.
The results? When I put the side 120mm fedding the HS and the top exhaust to low, and turn off the front 80mms and rear 92mm (I wired theese three to one switch), I can actually hear my HD working. Surfing the web and doing other low cpu-usage tasks, I have a CPU temp of about 39C. Running folding at home, with all fans to max, I get max load temp of 43C. This is with a t-bird 1200@1390 with 1.85Vcore. All in all I am very satisfied.
I would add an image here If I only knew how :).
This time I wanted to be able to switch from low to high fan speed. Not wanting to shell out cash for rheostats and the like I felt that beeing able to switch between 7 and 12 V would be sufficient for my needs. All I bought was 3 3-way flip switches. I wired the fans with 12V from the rail to the positive, then wired the negative to the middle connection of a switch. The two outer connectors on the switch was connected to 5v and 0v. In effect this gave me three options for each fan: High effect (12v), low effect (7v) and off. The switches was then mounted in a standard slotcover.
The entire proces took me about two hours, including drilling holes, and soldering everything together.
The results? When I put the side 120mm fedding the HS and the top exhaust to low, and turn off the front 80mms and rear 92mm (I wired theese three to one switch), I can actually hear my HD working. Surfing the web and doing other low cpu-usage tasks, I have a CPU temp of about 39C. Running folding at home, with all fans to max, I get max load temp of 43C. This is with a t-bird 1200@1390 with 1.85Vcore. All in all I am very satisfied.
I would add an image here If I only knew how :).