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GA-EP45C-DS3R system fan control

Forum Motherboards & Memory : Gigabyte - GA-EP45C-DS3R system fan control

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ondrugs   01-08-2009 at 12:26:11 AM

does anyone know if there is a way to control the system fan speeds on this mobo?
most of the forum threads i have read only mention issues with the CPU fan control, but this works fine for me. my chasis fans are screeching at 2000rpm!
i've tried speedfan, but it doesn't work. unless i'm doing at wrong.

any thoughts?

P.S. i'm running bios ver F5.

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bilbat   01-09-2009 at 03:03:11 PM
- 1 +

Where are your case fans plugged in? 'SYS_FAN2' is 'slaved' to the MCH temp (and is, on some MOBOs, buggy), not the MOBO temp; 'SYS_FAN1 and PWR_FAN have no speed control h'ware, and are best used just for sensing fan speeds 'split-off' the other two...

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ondrugs   01-09-2009 at 03:12:06 PM
- 0 +

Now that is interresting! I'll try that when I get home.
How do you do the splitting?

------------------------------ Intel Core 2 Quad Q6600 | 4GB Crucial Ballistix DDR2 PC2-6400 | Gigabyte EP45C-DS3R | Thermaltake ToughPower 700W | HIS X1900XT
 Reply to ondrugs
ondrugs   01-09-2009 at 04:10:43 PM
- 0 +

What would happen if you stuck a non-PWM Sys Fan parallel to the CPU PWM header with a PWN CPU cooler attached?

------------------------------ Intel Core 2 Quad Q6600 | 4GB Crucial Ballistix DDR2 PC2-6400 | Gigabyte EP45C-DS3R | Thermaltake ToughPower 700W | HIS X1900XT
 Reply to ondrugs
bilbat   01-09-2009 at 04:13:49 PM
- 0 +

I dunno - 'click to zoom' isn't working right now on my system, here's a link to ImageShack:
http://img514.imageshack.us/img514 [...] erskb8.jpg
http://img353.imageshack.us/img353/5281/finaltidy0048x6yb5.jpg

GB GA-X48-DS5 w/f8a BIOS - Q9550 stepE0 @ 3.825Ghz:
Arctic Cooling Freezer7Pro w/92mm PWM 'daisy-chained' to CoolIt Systems RamFan w/EverFlow F126025BU 60mm PWM;
Sunon KDE1204PFV2 40mm/NorthBridge; EverCool EC3010M12CA 30mm/SouthBridge;
8Gb (4x2) 1066 G.Skill F2-8500CL5D @ 1080 (DDR2-8640) 5-5-5-15 on 2.4(6:5)mult/1333strap...
CoolerMaster Cosmos 1000 w/Silverstone SST-CMD01 ESA 5ch fan controller/4ch temp sensor:
3 Arctic AC12L exhaust (top x 2 + rear); 2 Scythe SF12D (HDD cage top + rear); Scythe SF12E bottom intake...
Koutech IO-FPM220 3.5" Floppy & Card Reader; 2 IDE DVD's;
4 150Gb WD Velociraptors in two RAID0 pair-OSs & swaps; 2 1Tb WD RE3s in RAID1-data; 1 Sg 1.5Tb backups...
Multiboot via BootIt NextGeneration:
VistaUltimateX86/VistaUltimateX64/XpProX86/XpProX64(courtesy of TechNet)
SBD!

Reply to bilbat
bilbat   01-09-2009 at 04:17:52 PM
- 1 +

"What would happen if you stuck a non-PWM Sys Fan parallel to the CPU PWM header with a PWN CPU cooler attached? "

The parallel SysFan would run at 100% - the 12V pin on a PWM setup is ALWAYS at 12V - the speed control is accomplished by modulating the pin four 5V signal, which operates 12V switches on the fan itself...

Reply to bilbat
ondrugs   01-09-2009 at 04:46:13 PM
- 0 +

Thanks Billbat!

------------------------------ Intel Core 2 Quad Q6600 | 4GB Crucial Ballistix DDR2 PC2-6400 | Gigabyte EP45C-DS3R | Thermaltake ToughPower 700W | HIS X1900XT
 Reply to ondrugs
bilbat   01-09-2009 at 05:27:02 PM
- 0 +

Always welcome!

Bill

Reply to bilbat
ondrugs   01-10-2009 at 10:41:14 AM
- 0 +

Some good and bad news here.

I managed to split up the fan connectors and they work! You can see their fan speed and everything.
BUT! This motherboard still does not give you the option to control the sys_fan speed.
There is definitely a silver lining though, because the fans are running in parallel, so they run slow. Now they are nice and quiet at ~800rpm instead of 2000!

Reply to ondrugs
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