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Help me choose a psu please.

Last response: in Components
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November 11, 2011 9:18:07 PM

Ok i have recently choose a new graphics card.But it is recommended that i have a 500w psu.But i have no idea what psu will work for my computer and What wont here is some specs of my comp.Thanks
Motherboard
H-I41-uATX (Eton/EtonL)
Figure 1: Motherboard top view

Manufacturer: Foxconn
Form factor: microATX - 24.4 cm (9.6 inches) x 24.4 cm (9.6 inches)
Chipset: Intel G41 Express
Memory sockets: 2 x DDR3
Front side bus speeds: 1333/1066/800 MHz
Processor socket: 775
Expansion Slots:
1 PCI Express x16 slot for graphics card
2 PCI Express x1 slots
1 PCI slot
1 PCI Express x1 minicard slot
For more details, see Eton/EtonL motherboard specifications .
Processor
Intel Pentium E5800
Figure 2: Intel Pentium Dual-Core logo

Operating speed: Up to 3.2 GHz
Number of cores: 2
Socket: 775
Bus speed: 800 MHz
Processor upgrade information
Memory
4 GB
Amount: 4 GB
Speed: PC3-10600 MB/sec
Type: DDR3-1333
Memory upgrade information
Supports DDR3 DIMMs only
Dual channel memory architecture
Two DDR3 DIMM (240-pin) sockets
DIMM types:
PC3-10600 (DDR3-1333)
PC3-8500 (DDR3-1066)
PC3-6400 (DDR3-800)
Non-ECC memory only, unbuffered
Supports 2 GB DDR3 DIMMs
Supports up to 4 GB on 64-bit PCs
Maximum memory only if using 2GB DDR3 DIMM modules

NOTE:32-bit PCs cannot address a full 4.0 GB of memoryThis motherboard is not planned for use with a 32-bit OS
Video graphics
Integrated graphics using Intel GMA x4500
*Integrated video is not available if a graphics card is installed.
Integrated graphics using Intel GMA x4500
Also supports PCI Express x16 graphics cards*

NOTE:*Either integrated graphics or the PCI Express x16 slot are usable at one time; they are not usable concurrently.
Sound/Audio
Integrated Realtek ALC662 Audio
Networking
LAN: 10-Base-T
Hard drive
1 TB
CD/DVD disc drive
SuperMulti DVD Burner drive
Memory Card Reader
6-in-1 multimedia card reader
Computer Case
Mid-size ATX
Height: 38.40 cm (15.12 inches)
Width: 16.58 cm (6.53 inches)
Length: 42.9 cm (16.89 inches)
Bay size Total Bays*
13.33 cm (5.25 inch) 2
8.89 cm (3.5 inch) 1
* Bays may be occupied by existing hardware.
Power Supply
300W (100V-240V)
Total wattage: 300W

More about : choose psu

a c 1108 ) Power supply
November 11, 2011 9:38:11 PM

What is the make and model of the new discrete graphics card?
November 11, 2011 11:49:31 PM

Sapphire ATI Radeon HD 5670 (100289-2L) 1024MB PCIe x16 Gen 2.0
Related resources
a c 1108 ) Power supply
November 12, 2011 12:33:01 AM

Your existing 300 Watt OEM power supply may already be able to support a single Radeon HD 5670 graphics card. My guess is that the OEM PSU has a +12 Volt continuous current rating of at least 18 Amps or greater.

For a system running a single Radeon HD 5670 graphics card requires that the power supply have a combined +12 Volt continuous current rating of 18 Amps or greater.

It's not the wattage of the power supply that determines whether or not it is sufficient to properly power the system. The most important PSU specification is the combined +12 Volt continuous current rating. If the PSU isn't able to meet this base requirement then it's not going to work properly with that graphics card in your system no matter how high the PSU's labelled wattage is.
November 12, 2011 3:16:18 AM

Ok i sort of get this :) 
a c 1108 ) Power supply
November 12, 2011 3:48:16 AM

rat642 said:
So something this this http://www.ebay.co.uk/itm/Alpine-500W-Quiet-120mm-PC-Re... .But obviously a more expensive one lol.

You're right, Alpine is not a reputable power supply brand.

The best reputable brands to select from are Antec, Corsair, Enermax, Seasonic and XFX.
!