These
prices are supplied by the vendors who attend
the market.
Click on the price to see the details of the
vendor.
| NEW
POWER SUPPLY UNITS (PSU) |
|
ATX
form
|
|
| Besta |
P4N3
- 500w |
$28 |
| Besta |
P4N4-
500w |
$33 |
| Besta |
P4N5
- 550w |
$38 |
| Besta |
P4N9
- 600w |
$49 |
| |
|
|
| |
|
|
| |
|
|
| |
|
|
| |
|
|
| USED
POWER SUPPLY UNITS (PSU) |
| AT
form |
from
|
$5 |
| ATX
form |
from
|
$10 |
Take note - are many 'imposter' power supplies
on the market.
Power supplies labeled as 500 watt, when they
are actually only 250 watts.
See <Calculate the
power output of your PSU>
Other items are available from other vendors
at the market
TECHNICAL
INFORMATION
The
following chart is only a guide to determine
how much power your computer is needing.
Please use the link at the bottom of the chart
to calculate your needs.
|
POWER
CONSUMPTION CHART
|
|
DEVICE
|
SPECS
|
POWER
USED
|
| PROCESSOR
(CPU) |
|
|
|
to
2.4GHz
|
74
|
| AMD
ATHLON 64 - up to |
|
89
|
| INTEL
Dual Core |
|
65
|
| MEMORY |
|
|
| SD
PC 66 / 100 |
128Mb
|
7
|
| SD
PC 133 |
128Mb
|
12
|
| DDR |
1Gb
|
10
|
| DDR
II |
1Gb
|
16
|
| MOTHERBOARD |
|
36
|
| VIDEO
CARD |
|
|
| AGP
up to |
32Mb
|
20
|
| AGP |
64
Mb
|
30
|
| RAEDON 7000-9600 |
|
40
|
| X600 |
|
66
|
| nVIDIA Geforce 3 - 4 |
|
35
|
| nVIDIA FX 6800 |
|
70
|
| HARD
DRIVE |
SINGLE
|
25
|
| DVD
ROM / BURNER |
SINGLE
|
25
|
| CD
ROM |
SINGLE
|
20
|
| MODEM |
PCI
|
4
|
| NETWORK
CARD |
PCI
|
4
|
| OTHER
CARDS |
PCI
|
4
|
| CASE
FAN |
80
-100mm
|
2
|
| USB
THUMB DRIVE |
|
5
|
| CPU
FAN |
|
3
|
| KEYBOARD
/ MOUSE |
|
3
|
|
TOTAL
|
|
| |
|
|
|
|
Remember that these are peak wattages. (when
the system first starts)
Even under full load, actual consumption is
usually less than these figures.
Calculate
the power output of your PSU
Find
a label on the side of the Power Supply Unit.
Just
because you see eg 500WATT on the label, if
your serious about your system, do the maths.
Open the computer case and a sticker similar
to the details below will be found.
| |
|
Red
|
Orange
|
Yellow
|
Blue
|
Purple
|
White
|
Gray
|
Black
|
|
+5
v
|
+3.3
v
|
+12
v
|
-12
v
|
+5vsb
|
-5
v
|
Power
Ok
|
Ground
|
|
12A
|
7A
|
8A
|
0.5A
|
2A
|
0.5A
|
|
|
| |
|
|
|
|
|
|
|
|
60
|
23
|
96
|
|
10
|
|
189
watts output
|
* v = volts & A = amps
There
are ways to tell if a power supply is labeled
correctly,
1)
Check the amperage on the +12V rail, a good
power supply will have a beefy +12V rail
(18 Amps or higher), or even dual +12V rails,
as Antec does with their TruePower series.
To
start PSU without a motherboard connected.
Short
PIN 14 (Power supply on) and any GND PIN - (ground)
NOTE SOME ATX WIRES MAYBE COLOURED DIFFERENTLY
THAN THE ONES DEPICTED BELOW!
|
ATX
20-PIN Power Connector Layout
|
|
PIN
|
SIGNAL
|
PIN
|
SIGNAL
|
|
1
|
3.3
V
|
11
|
3.3
V
|
|
2
|
3.3
V
|
12
|
-12
V
|
|
3
|
GND
|
13
|
GND
|
|
4
|
5
V
|
14
|
PS_ON
|
|
5
|
GND
|
15
|
GND
|
|
6
|
5
V
|
16
|
GND
|
|
7
|
GND
|
17
|
GND
|
|
8
|
PW_OK
|
18
|
-
5 V
|
|
9
|
5
V_SB
|
19
|
5
V
|
|
10
|
12
V
|
20
|
5
V
|
|
|
|
From
"Upgrading and Repairing PC's"
10th Anniversaty Ed, page 405 - Scott
Mueller. Que publications.
|
Lasted
updated 1 July, 2008
