atx power supply - aztcs.orgaztcs.org/meeting_notes/winhardsig/atx/atx-ps.pdf · • "power...
TRANSCRIPT
2
Web location for this
presentation:
http://aztcs.org
Click on “Meeting
Notes”2
3
SUMMARY
90+ percent of desktop
computers have power supplies
are adhere to or are close to
the specifications for ATX
power supplies.
3
4
TOPICS
• "ATX" Is a "Form Factor"
4
5
"ATX" IS A "FORM FACTOR"
"ATX" is a "form factor" for
motherboards inside computers
that was written by Intel
According to
https://en.wikipedia.org/wiki/Form
_factor_(design):
5
6
"ATX" IS A "FORM FACTOR"
(continued)
Form factor is an aspect of
hardware design which defines
and prescribes the size, shape,
and other physical specifications of
components, particularly in
consumer electronics and
electronic packaging.6
7
NON-MODULAR, SEMI-MODULAR, &
FULL MODULAR
• See
http://www.buildcomputers.net/
modular-psu.html
7
8
NON-MODULAR, SEMI-MODULAR, &
FULL MODULAR (continued)• The pinout on the power supply
side of a modular power supply is
not standardized so so that use the
modular cable for one
manufacturer's ATX power supply
with another manufacturer's ATX
power supply as explained at
https://www.gamersnexus.net/guide
s/2702-psa-on-mixing-modular-
psu-cables-dont-do-it 8
9
HP's DESKTOP PROPRIETARY
ATX-LIKE POWER SUPPLIES• Back in the 1990's, HP's ATX-
like power supplies were 1/2-
inch narrower than the standard
5.9-inch width of stock ATX
power supplies:
Their "Lite-On" ATX power
supplies are now an acceptable
6-inches wide.. 9
10
HP's DESKTOP PROPRIETARY
ATX-LIKE POWER SUPPLIES• Most of HP's "Lite-On" power supplies
have a non-standard "Slimline SATA
power" cable for the vertically-aligned
DVD drives in Envy desktop
computers: This will require a
peripheral-to-slimline adapter or a
SATA power-to-slimline adapter if you
use a regular ATX power supply in most
HP desktop computers: 10
1111
1212
1313
1414
1515
1616
17
A PROPRIETARY ATX-LIKE POWER
SUPPY IN AN HP 750 ENVY
DESKTOP
• Mfr. = Lite-On
• Lite-On part no. 6301-07
• H.P. Part No. 832005-001
• 300W, ATX, SATA
17
1818
1919
2020
21
A PROPRIETARY ATX-LIKE POWER
SUPPY IN AN HP 750 ENVY
DESKTOP (continued)
• "Power Judge" ATX power supply
tester showed that all voltages are
unstable:
All had blinking LEDs when the 24-
pin main power harness was
wiggled:
21
22
A PROPRIETARY ATX-LIKE POWER
SUPPY IN AN HP 750 ENVY
DESKTOP
• Mfr. = Lite-On
• Lite-On part no. 6301-07
• H.P. Part No. 832005-001
• 300W, ATX, SATA
22
23
A PROPRIETARY ATX-LIKE POWER
SUPPY IN AN HP 750 ENVY
DESKTOP (continued)
• The -5 Volt LED on the "Power
Judge" tester will not light up for any
ATX power supply that was
manufacturer in the past 10 years so
ignore this LED
23
24
A PROPRIETARY ATX-LIKE POWER
SUPPY IN AN HP 750 ENVY
DESKTOP (continued)
• "Power Judge" ATX power supply
tester showed that all voltages are
unstable:
All had blinking LEDs (except for the
-5 volt LED) when the 24-pin main
power harness was wiggled:
24
2525
2626
2727
2828
2929
30
A PROPRIETARY ATX-LIKE POWER
SUPPY IN AN HP 750 ENVY
DESKTOP (continued)
• 4-conductor 12-volt plug for the
motherboard is standard for all
"ATX12" power supplies:
30
3131
32
A PROPRIETARY ATX-LIKE POWER
SUPPY IN AN HP 750 ENVY
DESKTOP (continued)
• SATA power Y-splitter:
32
3333
34
A PROPRIETARY ATX-LIKE POWER
SUPPY IN AN HP 750 ENVY
DESKTOP (continued)• Slimline power cord for the vertically-
oriented DVD drive is common on
HP's ATX-like power supplies.
When using a regular ATX power
supply as a replacement part, you
have to utilize a peripheral-to-
slimline or a SATA power-to-slimline
adapter: 34
3535
36
A PROPRIETARY ATX-LIKE POWER
SUPPY IN AN HP 750 ENVY
DESKTOP (continued)
• Purchased an exact replacement for
$49 on eBay.
The replacement power supply was
not new.
36
3737
38
A SUPER-QUIET MEDIUM-PRICED
ATX POWER SUPPLY• PC Power & Cooling Silencer Series
600 Watt (600W)
80+ Bronze
Semi-Modular
Active PFC("power factor correction")
Industrial Grade ATX PC Power
Supply
3 Year Warranty
Model = PPCMK3S600 38
3939
4040
4141
4242
43
A SUPER-QUIET MEDIUM-PRICED ATX
POWER SUPPLY• The modular cables connect to 4 and
6-pin connectors on the power
supply's box:
There is no standard for the pinouts of
the connectors on the power supply's
box. Using
one manufacturer's modular cables on
another manufacturer's power supply
box is a potentialy life-threatening
situation! 43
4444
4545
4646
4747
4848
4949
5050
51
"RAILS" INSIDE POWER
SUPPLIES• See
http://www.playtool.com/pages/psurailhi
story/rails.html
51
52
"RAILS" INSIDE POWER
SUPPLIES (continued)• Increasing use of 12-volt rails over
the past 30 years:
Consequence 1:
Using older ATX power supplies to
power later model desktop
computers results in overheating
and rapid wear for the 12-volt rails
of older power supplies52
53
"RAILS" INSIDE POWER
SUPPLIES (continued)• Increasing use of 12-volt rails over
the past 30 years (continued):
Consequence 2:
Using newer ATX power supplies to
power earlier model desktop
computers results in overheating
and rapid wear for the 3.3 and 5
volt rails of older power supplies53