PSU

  acceptmyname 20:11 03 Aug 2009
Locked

How important is it to buy a branded PSU as I was at a computer fair at the weekend and I noticed they had no named psu 650watt to 1200watt with prices ranging from £10 to £15.

Also how would I know if these psu would fit my pc

  sunnystaines 20:28 03 Aug 2009

quality counts a lot with PSU's I would only buy a recommended brand.

  GaT7 20:28 03 Aug 2009

'How important is it to buy a branded PSU' - I would say very, especially if you were going to use it to power expensive hardware. The good efficiency of a branded PSU can also pay back over time by saving you in electricity bills (& helping the environment).

"Also how would I know if these psu would fit my pc" - by measuring the space available for the PSU in your case, & taking a tape measure along to measure the dimensions of the ones being sold. G

  Fruit Bat /\0/\ 20:31 03 Aug 2009

If renewing a PSU check:

1. The physical size of your PSU, some are hard to replace due to being a non standard size.
2. The amount of power need from the PSU don't skimp.
3 The correct connections for your equipment

1. Physical Dimensions

Besides the specs and form factors, the physical dimensions are also important factors in selecting a compatible power supply. Here is an outline of the physical dimensions of most standard power supplies:

# ATX: 6x3.5x5.5", HxWxD. Most common. Uses 4 mounting screws.
# Mini-ATX: 5x3.5x5", HxWxD. Rare size. Uses 4 mounting screws. Can be used in a regular ATX case, but often not the other way around.
# MicroATX: 5x3x4", HxWxD. Use 3 mounting screws. Not interchangeable with ATX or miniATX.
# Flex ATX: Even smaller than Micro ATX. Various sizes according to case specs; often not interchangeable.

Use the data above to determine if a particular power supply would fit your case.

The quality of a power supply can be estimated by its weight. While this is not a true scientific or thorough measurement of the power supply reliability, it is nevertheless a very simple and easy way for ordinary PC users to estimate and compare the quality of a power supply. Why weight matters click here

2. Power supply calculator click here

3. Correct connections
Some boards have 20 pin connectors others 24 pin
There is often a 4 pin plug required to power Intel CPUs
Molex D plugs for IDE HDD and CD/DVD drives
SATA power connections for latest HDDs and DVD drives.


Guide to changing PSU
click here
click here

  citadel 20:46 03 Aug 2009

If I was getting a new psu I would expect to pay £70 to £200.

  acceptmyname 20:46 03 Aug 2009

Thanks a lot dudes I will save my money then til I can afford a goid psu

  GaT7 21:12 03 Aug 2009

acceptmyname, what kind of system were you thinking of powering? G

  acceptmyname 21:28 03 Aug 2009

I have a compaq presario P4
9800GT gfx
2mb RAM
sb xfi sound card.

The reason I am thinking about it is because I am suffering bad fps in COD 4 and the only thing i have not upgraded is my PSU

  woodchip 21:42 03 Aug 2009

You cannot just go on it having a name to it, but it should count. One way is if you can handle the PSU see how Heavy it is as a Heavy PSU means bigger components not cheap tiny ones. You are not going to get a good PSU for ten to fifteen pounds

  acceptmyname 21:46 03 Aug 2009

Thanks woodchip, I accept that now hencce why I am gonna wait till i have saved dome money and get a good one I have already priced some from novatech.

  GaT7 22:14 03 Aug 2009

You don't need a 650-1000W PSU for that spec. A 400-500W good quality PSU with at least one dedicated 6pin PCI-E connector will be more than enough.

What's the exact model of your Compaq Presario?

If Novatech is your retailer of choice, one of these (max £41 will do nicely):

OCZ StealthXStream 400w click here = £30
HIPER HPU-4S425 425W click here = £30
Corsair CX400W click here = £41

I own the above Hiper & it's one of the lightest PSUs I've come across (quite literally!), but it sure packs a punch (read independent reviews).

Other good makes include: Antec, Enermax, Be Quiet, Etasis, Tagan, Silverstone, Zalman, Akasa, Xigmatek, FSP, Seasonic, Silverpower, Thermaltake, Coolermaster, Gigabyte, PC Power & Cooling

Also read about common PSU myths click here. G

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