Solved Power supply installation: any tips for a newbie?

pxfragonard

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Never done it before. I can see it connects to a 12 pin unit on the motherboard and another place on it with some squarish looking plug with what looks like metal flanges. Do I pinch those to remove? Also one goes into the video card. Is that it?

I'm nervous about wrecking my motherboard. Any tips on removal of connections and reconnecting? I'd take it up the street if it weren't for my bum shoulder.
 

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Microsoft Windows 7 Home Premium 64-bit 7601 ...Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz6 GBRadeon 6750 1gb
Computer Manufacturer/Model Number
HP Pavilion p6745f
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz
Motherboard
PEGATRON CORPORATION 2AB6
Memory
6 GB
Graphics Card(s)
Radeon 6750 1gb
Sound Card
(1) IDT High Definition Audio CODEC (2) Intel(R) Display A
Monitor(s) Displays
Acer x193w
Hard Drives
(1) WDC WD15EARS-60MVWB0 (2) Generic- Compact Flash USB Device (3) Generic- MS/MS-Pro USB Device (4) Generic- SD/MMC USB Device (5) Generic- SM/xD-Picture USB Device (6) WD My Book 1110 USB Device
PSU
Internal 500W (100V-240V)
Case
Mid-size ATX
Cooling
unknown
Keyboard
HP usb multimedia keyboard
Mouse
HP usb compliant mouse
Internet Speed
256 kbps
Other Info
Ver: CHI_713.bin vCHI7.13
Usually they will have a clip to hold them to motherboard each cable will have a latch on them just squeeze and pull up straight. Motherboard should have 2 cables to it. The 24 pin and 4 or 8 pin connection.
 

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win 10
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PC/Desktop
Computer Manufacturer/Model Number
dell xps 9000
OS
win 10
Check youtube for a video. It makes it easier after you see it.
 

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Windows 10 Pro X64Intel(R) Core(TM) i5-3570K CPU OC@ 4.5GHZ Turbo8.00 GB DDR3 1600MhzMSI Gaming X GTX 1070
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dude Build
OS
Windows 10 Pro X64
CPU
Intel(R) Core(TM) i5-3570K CPU OC@ 4.5GHZ Turbo
Motherboard
MSI Z77A-G45 Gaming
Memory
8.00 GB DDR3 1600Mhz
Graphics Card(s)
MSI Gaming X GTX 1070
Sound Card
Realtek High Definition
Monitor(s) Displays
Dell S23O9W, HP L1710
Screen Resolution
DELL-1920 x 1080 HP-1280 x1024
Hard Drives
Crucial m4 256 SSD, WD 7200RPM 500GB WD 1TB
PSU
Seasonic X650 GOLD
Case
Zalman Z12
Cooling
Antec Kuhler 920
Keyboard
Logitech
Mouse
MSI DS100 Interceptor
Internet Speed
50 down and 5 up
Antivirus
MSE
Browser
Chrome, IE 11
Other Info
Logitech X-620 Speakers
When I change a PSU, I always glue sticky notes to each connected rail of the old PSU that tells me where is goes. Then I know which rail goes where and it is easier to identify the correct plugs/rails on the new PSU.
 

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Vista, Windows7, Mint Mate, Zorin, Windows 8from 1.6GHz Duo to i7
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HP, Dell, Gateway, Toshiba - 4 laptops and 2 desktops
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Vista, Windows7, Mint Mate, Zorin, Windows 8
CPU
from 1.6GHz Duo to i7
Monitor(s) Displays
2x HP w2207
Hard Drives
5x HDD, 7x SSD, 12x Externals
Keyboard
with trackball - no mices
Mouse
Trackball mice
Internet Speed
DSL 6000
you can also upload a picture of your PSU so that we help you better, if you are not comfortable enough.
 

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Windows 7 Pro 32bitDual Core
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PC/Desktop
Computer Manufacturer/Model Number
HP
OS
Windows 7 Pro 32bit
CPU
Dual Core
Antivirus
Trend Micro
Dude ahd a good idea re YouTube and this will show you some of the stuff you will need to know
Set up Family Safety - Windows Help

In any case (no pun) the PSU comes with (usually) a install leaflet or instructions of some sort - one thing to remember mate is if connectors do not fit reasonably easy it probably is the wrong way round - don't force them ;)
 

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Desk1 7 Home Prem / Desk2 10 Pro / Main lap A...Desk1 i5 3750K / Laptop i7 GTX 860M / Desk2 i...Desk1 8GB (1866) / Desk2 16GB (1333) / Laptop...Desk 1& 2NVidia GTX 650 & Laptops on board Intel
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Own build (new) Desk1 / Asus ROG Win 7 / Desk2 1st build
OS
Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
CPU
Desk1 i5 3750K / Laptop i7 GTX 860M / Desk2 i5 2500
Motherboard
Desk1 Asus P877-V / Desk2 Gigabyte H67 UD3H / Laptop ?
Memory
Desk1 8GB (1866) / Desk2 16GB (1333) / Laptop 8Gb DDR3
Graphics Card(s)
Desk 1& 2NVidia GTX 650 & Laptops on board Intel
Sound Card
Desk 1 & 2 -XONAR DG Realtek High Def audio Laptop
Monitor(s) Displays
Desk 1 Benq HD 2450 / Desk2 Philips 24" / Laptop 17.5"
Screen Resolution
1920x1080 D1 & D2 & Laptop 1
Hard Drives
Desk1 Samsung 120GB 830 SSD
Asus ROG 256GB 850 Pro SSD
Desk2 Samsung 840 256 SSD
Toshiba 120GB EVO
PSU
Desk 1 Corsair HX 1050/ Laptop ? / Desk 2 Corsair HX 650
Case
Desk 1 Cooler HAF XM ? Toshiba laptop / Desk2 Coolermaster
Cooling
Fans on all Desk1 -2 Desk2 - all Coolermasters 5 Laptop ?
Keyboard
Desk 1 MS Sidewinder X6 Desk 2 MS Sidewinder X 4
Mouse
Desk 1&2 - Gigabyte MS 900 gamer - laptop - Logitec wireless
Internet Speed
ADSL2+
Other Info
One other Desktop (tester) and spare Toshba laptop both with SSD's
Running Kaspersky 2016 ISS on all machines config'd identically
Logitec audio stereo systems on each machine (x3)
Canon MG5250MFC
Router/modem TP-Link running WPA2SK
If you still can, look for a modular PSU. That's a lot easier and you don't have all those unused wires hanging around.
 

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Vista, Windows7, Mint Mate, Zorin, Windows 8from 1.6GHz Duo to i7
Computer Manufacturer/Model Number
HP, Dell, Gateway, Toshiba - 4 laptops and 2 desktops
OS
Vista, Windows7, Mint Mate, Zorin, Windows 8
CPU
from 1.6GHz Duo to i7
Monitor(s) Displays
2x HP w2207
Hard Drives
5x HDD, 7x SSD, 12x Externals
Keyboard
with trackball - no mices
Mouse
Trackball mice
Internet Speed
DSL 6000
1. Buy a modular power supply of quality.
2. Read the instruction manual.
3. Don't force any thing to plug in until you triple check to make sure the proper plug is being used in the proper socket. Read the manual.

Some plug ins are hard to install even when done correctly.
4. Read the Manual again.
 

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Windows 10 Pro. 64/ version 1709 Windows 7 Pr...Intel i7-6800K @ 4.3Corsair Platinum 16 gig @2400EVGA GTX 1070 OC
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Home made Desktop
OS
Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
CPU
Intel i7-6800K @ 4.3
Motherboard
ASUS X-99 Deluxe II
Memory
Corsair Platinum 16 gig @2400
Graphics Card(s)
EVGA GTX 1070 OC
Monitor(s) Displays
Asus 27" LED LCD/VE278Q
Screen Resolution
1920-1080 or 1280-720 HDMI
Hard Drives
INTEL SSD 730-240 Gb Sata 3.0/
PSU
EVGA Platium 1200W
Case
Phanteks Luxe Tempered Glass 8 fans/ one radiator
Cooling
XSPC/ Water Cooled CPU
Keyboard
Das 4 Professional
Mouse
Logitech M705/MX Anywhere 2-S
Internet Speed
100 mbits
Antivirus
Microsoft Security Essentials/ Malwarebytes Premium 3.0/ SAS
Browser
I.E. 11 default/Firefox/ ISP Time Warner Cable/Spectrum
Other Info
LG BluRay Burner/
Sound system-KLipsch-THX/
Icy Dock ssd Hot Swap bays.
Thanks for all your generous answers. I have checked some youtube videos. The one instruction that made me nervous was a responsible sounding guy who cautioned to provide support beneath the motherboard when inserting the 24 pin connector because it's possible to bend or crack a motherboard and I just don't see a way to do that when it's installed in the box. I notice that my PSU has 5. One goes to the Video Card, one to the 12 pin, one to the CPU's 4 pin, another seems to go to the hard drive and another has been tucked away neatly behind the card reader. I assume that one is for motherboards that handle extra power supply when needed, which my motherboard doesn't have. I've posted a photo. I don't know how good it is. My MB is Cleveland. I've provided HP's photo. Here's other info:

Manufacturer: Pegatron

Form factor: Micro-ATX - 24.4 cm (9.6 inches) x 24.4 cm (9.6 inches)

Chipset: Intel H67

Memory sockets: 4 x DDR3

Front side bus speeds: 2.5 GT/s

Processor socket: LGA 1155

Expansion Slots:

1 PCI Express x16

3 PCI Express x1

1 Half-Length MiniCard x1

More info here: HP Support document - HP Support Center
 

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My Computer My Computer

At a glance

Microsoft Windows 7 Home Premium 64-bit 7601 ...Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz6 GBRadeon 6750 1gb
Computer Manufacturer/Model Number
HP Pavilion p6745f
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz
Motherboard
PEGATRON CORPORATION 2AB6
Memory
6 GB
Graphics Card(s)
Radeon 6750 1gb
Sound Card
(1) IDT High Definition Audio CODEC (2) Intel(R) Display A
Monitor(s) Displays
Acer x193w
Hard Drives
(1) WDC WD15EARS-60MVWB0 (2) Generic- Compact Flash USB Device (3) Generic- MS/MS-Pro USB Device (4) Generic- SD/MMC USB Device (5) Generic- SM/xD-Picture USB Device (6) WD My Book 1110 USB Device
PSU
Internal 500W (100V-240V)
Case
Mid-size ATX
Cooling
unknown
Keyboard
HP usb multimedia keyboard
Mouse
HP usb compliant mouse
Internet Speed
256 kbps
Other Info
Ver: CHI_713.bin vCHI7.13
The extra one is probably for an additional disk - e.g. if you want to add a SSD. I have upgraded several HP and Dell desktops with SSDs and there was always that extra rail.
 

My Computer My Computer

At a glance

Vista, Windows7, Mint Mate, Zorin, Windows 8from 1.6GHz Duo to i7
Computer Manufacturer/Model Number
HP, Dell, Gateway, Toshiba - 4 laptops and 2 desktops
OS
Vista, Windows7, Mint Mate, Zorin, Windows 8
CPU
from 1.6GHz Duo to i7
Monitor(s) Displays
2x HP w2207
Hard Drives
5x HDD, 7x SSD, 12x Externals
Keyboard
with trackball - no mices
Mouse
Trackball mice
Internet Speed
DSL 6000
The extra one is probably for an additional disk - e.g. if you want to add a SSD. I have upgraded several HP and Dell desktops with SSDs and there was always that extra rail.

Thanks!
 

My Computer My Computer

At a glance

Microsoft Windows 7 Home Premium 64-bit 7601 ...Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz6 GBRadeon 6750 1gb
Computer Manufacturer/Model Number
HP Pavilion p6745f
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz
Motherboard
PEGATRON CORPORATION 2AB6
Memory
6 GB
Graphics Card(s)
Radeon 6750 1gb
Sound Card
(1) IDT High Definition Audio CODEC (2) Intel(R) Display A
Monitor(s) Displays
Acer x193w
Hard Drives
(1) WDC WD15EARS-60MVWB0 (2) Generic- Compact Flash USB Device (3) Generic- MS/MS-Pro USB Device (4) Generic- SD/MMC USB Device (5) Generic- SM/xD-Picture USB Device (6) WD My Book 1110 USB Device
PSU
Internal 500W (100V-240V)
Case
Mid-size ATX
Cooling
unknown
Keyboard
HP usb multimedia keyboard
Mouse
HP usb compliant mouse
Internet Speed
256 kbps
Other Info
Ver: CHI_713.bin vCHI7.13
You're making this out to be far more difficult than it really is. The plugs are all keyed and of different sizes so there is no way to plug them into the wrong connector or plug them in the wrong way. Replacing the power supply is one of the easiest and most foolproof repairs one could do on a computer. It takes about 5 minutes, maybe 10 minutes if you are extra, extra careful.

The only time I have seen someone botch installing a PSU is when a knucklehead used 6 inch long screws to screw down the PSU to the chassis. The screws were so long that they shorted something within the PSU.
 

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W10 Pro desktop, W11 laptop, W11 Pro tablet (...3.7Ghz 8700K i7, i7-11800H, i7-1065G716G desktop, 16G laptop, 4G tabletAMD Radeon RX580, RTX 3060, Intel Iris Plus
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Home Built desktop, Dell G15 5511 Gaming laptop,MS Surface Pro 7 tablet
OS
W10 Pro desktop, W11 laptop, W11 Pro tablet (all 64-bit)
CPU
3.7Ghz 8700K i7, i7-11800H, i7-1065G7
Motherboard
ASUS TUF Z370-Pro Gaming in desktop
Memory
16G desktop, 16G laptop, 4G tablet
Graphics Card(s)
AMD Radeon RX580, RTX 3060, Intel Iris Plus
Sound Card
High Definition Audio (Built-in to mobo)
Monitor(s) Displays
Samsung U32J59 32" (2x), 15.6", 12"
Screen Resolution
3840x2160, 3840x2160, 1920x1080, 2160x1440
Hard Drives
500G SSD for OS; 2T, 10T & 15T HDDs for Data on Desktop, 1TB SSD laptop, 128G SSD tablet.
PSU
Corsair CX 750M
Case
Antec 100
Cooling
CM 212+
Keyboard
IBM Model M - used continuously since 1986
Mouse
Microsoft Pro IntelliMouse
Internet Speed
400M down 8M up
Antivirus
Windows Defender
Browser
FireFox
Other Info
Built my first computer (8Mhz 8088cpu, 640K RAM, 20MB HDD, 2 360K floppy drives) in 1985 and have been building them for myself, relatives and friends ever since.
The only time I have seen someone botch installing a PSU is when a knucklehead used 6 inch long screws to screw down the PSU to the chassis. The screws were so long that they shorted something within the PSU.

:roflmao:
 

My Computer My Computer

At a glance

Vista, Windows7, Mint Mate, Zorin, Windows 8from 1.6GHz Duo to i7
Computer Manufacturer/Model Number
HP, Dell, Gateway, Toshiba - 4 laptops and 2 desktops
OS
Vista, Windows7, Mint Mate, Zorin, Windows 8
CPU
from 1.6GHz Duo to i7
Monitor(s) Displays
2x HP w2207
Hard Drives
5x HDD, 7x SSD, 12x Externals
Keyboard
with trackball - no mices
Mouse
Trackball mice
Internet Speed
DSL 6000
You're making this out to be far more difficult than it really is. The plugs are all keyed and of different sizes so there is no way to plug them into the wrong connector or plug them in the wrong way. Replacing the power supply is one of the easiest and most foolproof repairs one could do on a computer. It takes about 5 minutes, maybe 10 minutes if you are extra, extra careful.

The only time I have seen someone botch installing a PSU is when a knucklehead used 6 inch long screws to screw down the PSU to the chassis. The screws were so long that they shorted something within the PSU.
Never done it before. That's why. Six in screws??? Wow.
 

My Computer My Computer

At a glance

Microsoft Windows 7 Home Premium 64-bit 7601 ...Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz6 GBRadeon 6750 1gb
Computer Manufacturer/Model Number
HP Pavilion p6745f
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz
Motherboard
PEGATRON CORPORATION 2AB6
Memory
6 GB
Graphics Card(s)
Radeon 6750 1gb
Sound Card
(1) IDT High Definition Audio CODEC (2) Intel(R) Display A
Monitor(s) Displays
Acer x193w
Hard Drives
(1) WDC WD15EARS-60MVWB0 (2) Generic- Compact Flash USB Device (3) Generic- MS/MS-Pro USB Device (4) Generic- SD/MMC USB Device (5) Generic- SM/xD-Picture USB Device (6) WD My Book 1110 USB Device
PSU
Internal 500W (100V-240V)
Case
Mid-size ATX
Cooling
unknown
Keyboard
HP usb multimedia keyboard
Mouse
HP usb compliant mouse
Internet Speed
256 kbps
Other Info
Ver: CHI_713.bin vCHI7.13
I get that you've never done it before. I was trying to convey to you that it's pretty easy and you'll do fine (just don't use long screws!). ;)
 

My Computer My Computer

At a glance

W10 Pro desktop, W11 laptop, W11 Pro tablet (...3.7Ghz 8700K i7, i7-11800H, i7-1065G716G desktop, 16G laptop, 4G tabletAMD Radeon RX580, RTX 3060, Intel Iris Plus
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Home Built desktop, Dell G15 5511 Gaming laptop,MS Surface Pro 7 tablet
OS
W10 Pro desktop, W11 laptop, W11 Pro tablet (all 64-bit)
CPU
3.7Ghz 8700K i7, i7-11800H, i7-1065G7
Motherboard
ASUS TUF Z370-Pro Gaming in desktop
Memory
16G desktop, 16G laptop, 4G tablet
Graphics Card(s)
AMD Radeon RX580, RTX 3060, Intel Iris Plus
Sound Card
High Definition Audio (Built-in to mobo)
Monitor(s) Displays
Samsung U32J59 32" (2x), 15.6", 12"
Screen Resolution
3840x2160, 3840x2160, 1920x1080, 2160x1440
Hard Drives
500G SSD for OS; 2T, 10T & 15T HDDs for Data on Desktop, 1TB SSD laptop, 128G SSD tablet.
PSU
Corsair CX 750M
Case
Antec 100
Cooling
CM 212+
Keyboard
IBM Model M - used continuously since 1986
Mouse
Microsoft Pro IntelliMouse
Internet Speed
400M down 8M up
Antivirus
Windows Defender
Browser
FireFox
Other Info
Built my first computer (8Mhz 8088cpu, 640K RAM, 20MB HDD, 2 360K floppy drives) in 1985 and have been building them for myself, relatives and friends ever since.
Thanks for all your generous answers. I have checked some youtube videos. The one instruction that made me nervous was a responsible sounding guy who cautioned to provide support beneath the motherboard when inserting the 24 pin connector because it's possible to bend or crack a motherboard and I just don't see a way to do that when it's installed in the box. I notice that my PSU has 5. One goes to the Video Card, one to the 12 pin, one to the CPU's 4 pin, another seems to go to the hard drive and another has been tucked away neatly behind the card reader. I assume that one is for motherboards that handle extra power supply when needed, which my motherboard doesn't have. I've posted a photo. I don't know how good it is. My MB is Cleveland. I've provided HP's photo. Here's other info:

Manufacturer: Pegatron

Form factor: Micro-ATX - 24.4 cm (9.6 inches) x 24.4 cm (9.6 inches)

Chipset: Intel H67

Memory sockets: 4 x DDR3

Front side bus speeds: 2.5 GT/s

Processor socket: LGA 1155

Expansion Slots:

1 PCI Express x16

3 PCI Express x1

1 Half-Length MiniCard x1

More info here: HP Support document - HP Support Center
Sorry about my earlier post meant for someone else:o

Now to find the size you want use this it will give you a good idea of that for manufacturers well they are exactly what they seem to be for example some Corsair models are made by one company and others by another but in general it is better to buy something that is not cheap (and usually nasty)
eXtreme Power Supply Calculator - The only power supply calculator trusted by PSU manufacturers and computer enthusiasts
 

My Computer My Computer

At a glance

Desk1 7 Home Prem / Desk2 10 Pro / Main lap A...Desk1 i5 3750K / Laptop i7 GTX 860M / Desk2 i...Desk1 8GB (1866) / Desk2 16GB (1333) / Laptop...Desk 1& 2NVidia GTX 650 & Laptops on board Intel
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Own build (new) Desk1 / Asus ROG Win 7 / Desk2 1st build
OS
Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
CPU
Desk1 i5 3750K / Laptop i7 GTX 860M / Desk2 i5 2500
Motherboard
Desk1 Asus P877-V / Desk2 Gigabyte H67 UD3H / Laptop ?
Memory
Desk1 8GB (1866) / Desk2 16GB (1333) / Laptop 8Gb DDR3
Graphics Card(s)
Desk 1& 2NVidia GTX 650 & Laptops on board Intel
Sound Card
Desk 1 & 2 -XONAR DG Realtek High Def audio Laptop
Monitor(s) Displays
Desk 1 Benq HD 2450 / Desk2 Philips 24" / Laptop 17.5"
Screen Resolution
1920x1080 D1 & D2 & Laptop 1
Hard Drives
Desk1 Samsung 120GB 830 SSD
Asus ROG 256GB 850 Pro SSD
Desk2 Samsung 840 256 SSD
Toshiba 120GB EVO
PSU
Desk 1 Corsair HX 1050/ Laptop ? / Desk 2 Corsair HX 650
Case
Desk 1 Cooler HAF XM ? Toshiba laptop / Desk2 Coolermaster
Cooling
Fans on all Desk1 -2 Desk2 - all Coolermasters 5 Laptop ?
Keyboard
Desk 1 MS Sidewinder X6 Desk 2 MS Sidewinder X 4
Mouse
Desk 1&2 - Gigabyte MS 900 gamer - laptop - Logitec wireless
Internet Speed
ADSL2+
Other Info
One other Desktop (tester) and spare Toshba laptop both with SSD's
Running Kaspersky 2016 ISS on all machines config'd identically
Logitec audio stereo systems on each machine (x3)
Canon MG5250MFC
Router/modem TP-Link running WPA2SK
I get that you've never done it before. I was trying to convey to you that it's pretty easy and you'll do fine (just don't use long screws!). ;)
I'm pretty sure I'll use the ones provided! :)
 

My Computer My Computer

At a glance

Microsoft Windows 7 Home Premium 64-bit 7601 ...Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz6 GBRadeon 6750 1gb
Computer Manufacturer/Model Number
HP Pavilion p6745f
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz
Motherboard
PEGATRON CORPORATION 2AB6
Memory
6 GB
Graphics Card(s)
Radeon 6750 1gb
Sound Card
(1) IDT High Definition Audio CODEC (2) Intel(R) Display A
Monitor(s) Displays
Acer x193w
Hard Drives
(1) WDC WD15EARS-60MVWB0 (2) Generic- Compact Flash USB Device (3) Generic- MS/MS-Pro USB Device (4) Generic- SD/MMC USB Device (5) Generic- SM/xD-Picture USB Device (6) WD My Book 1110 USB Device
PSU
Internal 500W (100V-240V)
Case
Mid-size ATX
Cooling
unknown
Keyboard
HP usb multimedia keyboard
Mouse
HP usb compliant mouse
Internet Speed
256 kbps
Other Info
Ver: CHI_713.bin vCHI7.13
Thanks for all your generous answers. I have checked some youtube videos. The one instruction that made me nervous was a responsible sounding guy who cautioned to provide support beneath the motherboard when inserting the 24 pin connector because it's possible to bend or crack a motherboard and I just don't see a way to do that when it's installed in the box. I notice that my PSU has 5. One goes to the Video Card, one to the 12 pin, one to the CPU's 4 pin, another seems to go to the hard drive and another has been tucked away neatly behind the card reader. I assume that one is for motherboards that handle extra power supply when needed, which my motherboard doesn't have. I've posted a photo. I don't know how good it is. My MB is Cleveland. I've provided HP's photo. Here's other info:

Manufacturer: Pegatron

Form factor: Micro-ATX - 24.4 cm (9.6 inches) x 24.4 cm (9.6 inches)

Chipset: Intel H67

Memory sockets: 4 x DDR3

Front side bus speeds: 2.5 GT/s

Processor socket: LGA 1155

Expansion Slots:

1 PCI Express x16

3 PCI Express x1

1 Half-Length MiniCard x1

More info here: HP Support document - HP Support Center
Sorry about my earlier post meant for someone else:o

Now to find the size you want use this it will give you a good idea of that for manufacturers well they are exactly what they seem to be for example some Corsair models are made by one company and others by another but in general it is better to buy something that is not cheap (and usually nasty)
eXtreme Power Supply Calculator - The only power supply calculator trusted by PSU manufacturers and computer enthusiasts
Thanks for that link. I used Cooler Master's lookup. It will be interesting to see how they differ.
 

My Computer My Computer

At a glance

Microsoft Windows 7 Home Premium 64-bit 7601 ...Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz6 GBRadeon 6750 1gb
Computer Manufacturer/Model Number
HP Pavilion p6745f
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz
Motherboard
PEGATRON CORPORATION 2AB6
Memory
6 GB
Graphics Card(s)
Radeon 6750 1gb
Sound Card
(1) IDT High Definition Audio CODEC (2) Intel(R) Display A
Monitor(s) Displays
Acer x193w
Hard Drives
(1) WDC WD15EARS-60MVWB0 (2) Generic- Compact Flash USB Device (3) Generic- MS/MS-Pro USB Device (4) Generic- SD/MMC USB Device (5) Generic- SM/xD-Picture USB Device (6) WD My Book 1110 USB Device
PSU
Internal 500W (100V-240V)
Case
Mid-size ATX
Cooling
unknown
Keyboard
HP usb multimedia keyboard
Mouse
HP usb compliant mouse
Internet Speed
256 kbps
Other Info
Ver: CHI_713.bin vCHI7.13

My Computer My Computer

At a glance

Desk1 7 Home Prem / Desk2 10 Pro / Main lap A...Desk1 i5 3750K / Laptop i7 GTX 860M / Desk2 i...Desk1 8GB (1866) / Desk2 16GB (1333) / Laptop...Desk 1& 2NVidia GTX 650 & Laptops on board Intel
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Own build (new) Desk1 / Asus ROG Win 7 / Desk2 1st build
OS
Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
CPU
Desk1 i5 3750K / Laptop i7 GTX 860M / Desk2 i5 2500
Motherboard
Desk1 Asus P877-V / Desk2 Gigabyte H67 UD3H / Laptop ?
Memory
Desk1 8GB (1866) / Desk2 16GB (1333) / Laptop 8Gb DDR3
Graphics Card(s)
Desk 1& 2NVidia GTX 650 & Laptops on board Intel
Sound Card
Desk 1 & 2 -XONAR DG Realtek High Def audio Laptop
Monitor(s) Displays
Desk 1 Benq HD 2450 / Desk2 Philips 24" / Laptop 17.5"
Screen Resolution
1920x1080 D1 & D2 & Laptop 1
Hard Drives
Desk1 Samsung 120GB 830 SSD
Asus ROG 256GB 850 Pro SSD
Desk2 Samsung 840 256 SSD
Toshiba 120GB EVO
PSU
Desk 1 Corsair HX 1050/ Laptop ? / Desk 2 Corsair HX 650
Case
Desk 1 Cooler HAF XM ? Toshiba laptop / Desk2 Coolermaster
Cooling
Fans on all Desk1 -2 Desk2 - all Coolermasters 5 Laptop ?
Keyboard
Desk 1 MS Sidewinder X6 Desk 2 MS Sidewinder X 4
Mouse
Desk 1&2 - Gigabyte MS 900 gamer - laptop - Logitec wireless
Internet Speed
ADSL2+
Other Info
One other Desktop (tester) and spare Toshba laptop both with SSD's
Running Kaspersky 2016 ISS on all machines config'd identically
Logitec audio stereo systems on each machine (x3)
Canon MG5250MFC
Router/modem TP-Link running WPA2SK
Yes please let us know and just in case you might b interested this is who makes what - well I use these as a guide http://whirlpool.net.au/wiki/psu_manufacturers & PSU Makers: C-D - Who's Who In Power Supplies, 2014: Brands Vs. Manufacturers

PS You need to go back to this for the start PSU Makers: 0-9 And A-B - Who's Who In Power Supplies, 2014: Brands Vs. Manufacturers
I'll do that as soon as I can decipher the Greek. I had to look up overclocking yesterday :)

Your help is much appreciated, confusion therapist. I sure do need one!
 

My Computer My Computer

At a glance

Microsoft Windows 7 Home Premium 64-bit 7601 ...Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz6 GBRadeon 6750 1gb
Computer Manufacturer/Model Number
HP Pavilion p6745f
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz
Motherboard
PEGATRON CORPORATION 2AB6
Memory
6 GB
Graphics Card(s)
Radeon 6750 1gb
Sound Card
(1) IDT High Definition Audio CODEC (2) Intel(R) Display A
Monitor(s) Displays
Acer x193w
Hard Drives
(1) WDC WD15EARS-60MVWB0 (2) Generic- Compact Flash USB Device (3) Generic- MS/MS-Pro USB Device (4) Generic- SD/MMC USB Device (5) Generic- SM/xD-Picture USB Device (6) WD My Book 1110 USB Device
PSU
Internal 500W (100V-240V)
Case
Mid-size ATX
Cooling
unknown
Keyboard
HP usb multimedia keyboard
Mouse
HP usb compliant mouse
Internet Speed
256 kbps
Other Info
Ver: CHI_713.bin vCHI7.13
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