Question about E-Machines Bestec ATX-300-12E Rev. D 300w E-Machine GTW Power Supply Part 100929 (ATX30012E) Power Supply

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Upgrade for Bestec ATX 300 12E

I am trying to find an upgrade for my Gateway GT5242E power supply. It currently has a Bestec ATX 300 12E. I have found a 400W upgrade with the same dimensions (6"wide x 3.5" tall x 5.5" deep). However I would like to have more power if possible. Can you recommend a power supply that will fit into the housing of my machine?

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  • Patrick Ultsch May 11, 2010

    Do you want to buy same manufacturer, if so look at the PS II for Pentium 4 product. Comes in 340W and 400W. Also a company in LA. has 600W for about $55.00. But will need the specs for voltages and current min requirements for that.

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Hipro- HP-P3527F3W
is the replacement for Bestec 300W

Posted on Sep 16, 2009

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Go to CPUtopia.com for replacement upgrades at good price

Posted on Nov 25, 2009

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1 Answer

Computer won't power up. How can I confirm that it is in fact my Bestec ATX-300-12EB3?


The quickest and easiest method.
Beg or borrow another power and connect it to your computer.

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Regarding 250W SMPS


250 watt is low under any circumstances, I'd upgrade atleast to a 450 or higher, around 650watt to be extra safe.

Jul 06, 2010 | Gateway Emachine Bestec ATX-250-12E PS...

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How to use ATX-250-12z SMPS with 24 pin


Chances are that 250w power supply is not going to power a motherboard with a 24 pin connector, but you can try.
You will need to purchase a 20 to 24 pin adapter cable.
Google Search Terms: 20 to 24 pin adapter

Oct 27, 2009 | Gateway Emachine Bestec ATX-250-12E PS...

1 Answer

The pc wont power up and the green led on the PSU is just flashing, is the bestec atx 250 12z broken?


Most likely yes.

I would also reccomend an upgrade to that PSU when replacing it.

Something in the 450-Watt neighborhood is usually a bit more robust.

Oct 15, 2009 | HP ATX-250-12Z, ATX-250-12Z REV.: D2, HP...

1 Answer

Power supply upgrade


that is a standard ATX power supply, so 95% of the aftermarket power supplies will work. Id suggest going to newegg.com and ordering one, very cheap there.

Jun 23, 2009 | Bestec System Power Supplies

1 Answer

What is the p7 connector on a atx-1956-d for? the upgraded power supply has no provision for this connector? help please!!!!!!!!! gjohannsen@verizon.net


This is not a problem, and as it sounds, is not used in your system.

Some video cards have such huge processing power that they need thier own supply, as it would draw too much current from the motherboard otherwise. Below is a web site which reinforces this information, and gives an explanation of each connector.

http://www.affordablesurplus.com/bestec-atx-1956d-power-supply.asp

Or do I not understand you. Do you have one less, or one too many?

Apr 13, 2009 | HP Bestec ATX-1956D 200w HP Part No...

1 Answer

Upgrade for Bestec ATX-1956D (HP p/n: 0950-4106)


How about the LC Power LC350M Micro ATX - 380 Watt

or the 

Logisys 350W Micro ATX

They should fit your form factor and output as much as 350W being relatively cheap, but neither gets 18 amps on 12V rail...
I think no power supply of that size has an output like that...think about a cheap but substancial chassis upgrade if you need that power...Have a look at directron for the PSUs.

Feb 13, 2009 | HP Bestec ATX-1956D 200w HP Part No...

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