1. Motherboard cu?a ba’c (ga-8i915pl-g(rev1.x)) co’ CPU_FAN
(Cooler Fan Power Connector): 4 pins (trang 20):
"http://www.gigabyte.com.tw/Support/Motherboard/Manual_DownloadFile.aspx?FileType=Manual&FileID=16373";
"http://asia.giga-byte.com/FileList/Manual/motherboard_manual_ga-8i915pl-g(rev1.x)_e.pdf"
Pin Definition
---- ----------
1 GND
2 +12V
3 Sense
4 Speed control
Co’ hai loa.i CPU fan. Ba'’c pha?i xa'c ddi.nh CPU cu?a ba'c co'
loa.i fan na`o, theo ca'p 3 hay 4 da^y cu?a fan:
a. Lo.ai 3 da^y (no^'i dde^'n pins 1, 2 va` 3) , CPU fan speed cu?a loa.i
na`y ddu+o+.c ddie^`u khie^?n bo+?i ddie^.n the^' tu+` pin 2 (+5V ..+12V).
Pin 3 du`ng dde^? ‘do`’ to^’c ddo^. CPU fan.
b. Lo.ai 4 da^y (no^'i dde^'n pins 1, 2, 3 va` 4) , CPU fan speed cu?a loa.i
na`y ddu+o+.c ddie^`u khie^?n bo+?i xung (Pulse Width Modulation) tu+` pin
4. DDie^.n the^' tu+` pin 2 la` nhu+~ng xung (pulses 0V-+12V), ddie^`u
khie^?n tu+` pin 4. Pin 3 du`ng dde^? do` to^'c ddo^. CPU fan
CMOS-BIOS se~ tu+. ddo^.ng nha^.n ra fan lo.ai a (3 da^y) hay loa.i b (4
da^y) ne^'u ba’c set theo trang 43:
CPU Smart Fan Control : Enable
CPU Smart Fan Mode : Auto
Ne^'u ba'c cha('c cha('n CPU fan co' 3 da^y (loa.i a) , ba'c set theo trang
43:
CPU Smart Fan Control : Enable
CPU Smart Fan Mode : Voltage (Set to Voltage”when you use a CPU fan
with a 3-pin power cable)
Ne^'u ba'c cha('c cha('n CPU fan co' 4 da^y (loa.i b) , ba’c set theo
trang 43:
CPU Smart Fan Control : Enable
CPU Smart Fan Mode : PWM (Set to PWM”when you use a CPU fan with a
4-pin power cable)
2. Ngoa`i CMOS ba'c co’ the^? cha.y EasyTune 5 dde^? canh chu+`ng va`
ddi.nh nhie^.t ddo^. cho CPU va` fan speed. Nhu+ng Easy Tune 5 chi? cha.y
trong Windows (XEN va` wine va` vm.. dda^u ca? ro^`i ??! Tre^n Linux nha^'t
ddi.nh co' dda^u ddo' tre^n ma.ng, cai' tri`nh nho nho? ddo.c CMOS data va`
display tre^n KDE hay gnome)
Easy Tune 5 cho Windows NT,Windows 2000,Windows XP,Windows XP 64bit:
"http://www.gigabyte.com.tw/Support/Motherboard/Utility_DownloadFile.aspx?FileType=Utility&FileID=50"”
DDe^` nghi. ba'c cha.y Easy Tune 5 tre^n Windows XP ro^`i ta.o la.i
(reproduce) nhu~ng hie^.n tu+o+.ng ma` ba'c ga(.p tre^n Linux trong khi ghi
che'p CPU-Temp va` CPU Fan speed, qua Easy Tune 5 va`o lu’c CPU fan
cha.y e^m (CPU-Temp lu'c a^'y bao nhie^u?) va` lu'c CPU fan cha.y o^`n
(CPU-Temp lu'c a^'y bao nhie^u?).
3. Ne^'u du`ng Easy Tune 5, ba'c xa'c ddi.nh ra(`ng CPU fan cha.y he^'t
to^'c lu+.c va` ra^'t o^`n khi CPU-Temp co`n tha^'p (du+o+'i 65 ddo^. C)
thi` ba'c co' the^? ca(‘t da^y dde^'n pin 2 va` no^'i che^m va`o cho^?
ca('t mo^.t bie^'n tro+? (potentiometer) vo+'i tri. theo co^ng thu+'c sau,
ne^'u ba’c muo^'n thay ddo^?i ddie^.n the^' cu?a pin 2, qua bie^'n
tro+?, tu+` +7V (CPU fan cha.y e^m) dde^'n +12V (CPU fan cha.y o^`n) va`
cu+o+`ng ddo^. ddie^.n cua? fan la` 200 mili Ampere:
(Delta U)/I = R = (12V - 7V)/200mA = 25 Ohm.
Ne^'u ba’c cha.y quanh na(`m vo+’i mo^.t tri. co^' ddinh. cu?a
bie^'n tro+? la` 12 Ohm, ma` vo+'i tri. ddo' Easy Tune 5 kho^ng bao gio+`
bie^?u thi. qua' 65 ddo^. C no+i CPU, thi` ba'c qua(ng qua'ch ca'i bie^'n
tro+? 25 Ohm va` thay va`o dda^'y ca'i ddie^.n tro+? 12 Ohm/0.5W (P = U*I =
R*I*I = 12 Ohm*0.2A*0.2A = 0.48 W) (PSPICE va` Tcl-SPICE va` Scilab.. dda^u
ca? ro^`i ??!)
To'm la.i, nghe^`“cho+i”cu~ng la('m co^ng phu! ngay cho nhu+~ng
ngu+o+`i ma` ngo^n ngu+~ ta.o tri`nh duy nha^'t ma` ho. tho^ng tha.o la`
ca’i .. mo? ha`n
Va` mo^.t la^`n nu+~a , kho^ng ai mang tra'ch nhie^.m gi` ne^’u nhu+~ng
su+. co^' co'’ the^? xa^?y ra, tru+` ba'’c, ne^’'u ba'c theo
lo+`i khuye^n tre^n!
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