Gateway 4300-15e 300w psu upgrading for ATI 5750 HD?


Apr 24, 2010
Will I need a new power supply or is it just recommended that I do? If so, which supply would be recommended for my computer. Here are the specs.

AMD Phenom(tm) X4 810 2.6GHz
FSP ATX-300GU - 300 Watt ATX Power Supply
Mother board Systemboard with AMD® 780G Chipset
1TB Hard Drive

Some of it may not be important but there it is.


Jun 13, 2008
I have a gateway fx series computer that i had to upgrade to a new video card. Here were my specs

Intel Q6600 2.4ghz
G33 Intel Motherboard
IDE DVDRW drive dug up from somewhere at gateway
500GB HD
400W Power Supply

I recently needed to upgrade my video card as my old 8800GT died. I upgraded to a Diablotek 450W p/s and an ATI 5770 card.

Running the 5750 on a 300 wouldn't work. It would tax your power supply too much for requirements. Companies put the cheapest power supplies they can into systems to run the components they ship with.
As long as you don't buy the cheapest power supply out there I wouldn't worry about the brand. If you can find one with 80% or better efficiency for a good price you should be fine. But if you're already looking at Newegg, check the reviews.

Sorry, I mean to look for a 450W or better, it can probably run on a 400, but the cost is so minimal if you need to upgrade anyways.
Kevin - Does your system have a video card or are you using the motherboard built-in graphics?

popaholic - Here are the official ATI recommended power supply requirements for the ATI Radeon HD 5770 and 5750 video cards:

450 watt or greater power supply with one 75 watt, 6-pin PCI Express® power connector recommended.

600 watt or greater power supply with two 75 watt, 6-pin PCI Express® connectors for ATI CrossFireX™ technology in dual mode.

The recommendations are for an entire pc system.
First off if you didnt already buy the 5750 dont get it get the 5770.

450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)

The 5750 and 5770 will run fine on a quality 400 watt PSY with 30 Amps on the 12 volt rail.

Corsair 450 watt $59.99 after rebate.

This unit would be perfect an provide plenty of power to spare.