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Gateway SX2800 PSU upgrade

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August 15, 2009 10:11:35 PM

I would like to upgrade my sx2800 with a new psu.

The current psu has 220 watts. The sx2800 is a slimline type case and I need to know what psu is compatable with this computer.

Can anyone recommend a psu for the sx2800 that would give me at least 300 watts or more.

Thanks!!!

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a c 165 ) Power supply
August 15, 2009 10:17:25 PM

i know this one will fit in a Dell slim line, it should fit in yours

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

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September 9, 2009 8:54:36 PM

does anyone know if that ended up fitting?
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September 10, 2009 11:40:43 PM

Nope. Does not appear as though it will fit:

Seasonic TFX 300w PS

6.9" * 3.3" * 2.8"

Stock 220W PS

8.9" * 3.6" * 2.1" (actually measured on my sx2800 +- 0.050")


It's the 2.8" that's killing you. As far as I can tell on mine, you might get a supply that's 2.3" high in there (maybe) but 2.8" - no way !! What's happening is that the motherboard/heatsink/fan assy can't allow for it. So we're stuck with the 220W PS. From what I've read so far it appears that
SAPPHIRE 100252HDMI Radeon HD 4550 card will work with this PS althought I think more venting/cirrculation (fans, vent holes) should be required IMHO.
And I'm thinking as far as providing a opening covered with mesh over the back half of the "tray" on top of the case. That's right directly above and adjacent to the video graphics card that would sit in the PCIe -16 slot.
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September 18, 2009 6:13:29 AM

How about this?

http://www.directron.com/mfx9300.html

Says it will fit the HP slimline and the dimensions are ( W x H x D ) 3.2" x 1.7" x 6"

Im in the same boat, I got the sx2800 since it's a bargain quad.


applejak_2000 said:
Nope. Does not appear as though it will fit:

Seasonic TFX 300w PS

6.9" * 3.3" * 2.8"

Stock 220W PS

8.9" * 3.6" * 2.1" (actually measured on my sx2800 +- 0.050")


It's the 2.8" that's killing you. As far as I can tell on mine, you might get a supply that's 2.3" high in there (maybe) but 2.8" - no way !! What's happening is that the motherboard/heatsink/fan assy can't allow for it. So we're stuck with the 220W PS. From what I've read so far it appears that
SAPPHIRE 100252HDMI Radeon HD 4550 card will work with this PS althought I think more venting/cirrculation (fans, vent holes) should be required IMHO.
And I'm thinking as far as providing a opening covered with mesh over the back half of the "tray" on top of the case. That's right directly above and adjacent to the video graphics card that would sit in the PCIe -16 slot.

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September 22, 2009 7:37:41 PM

TheStallion said:
Do you think this video card would work without having to upgrade the power supply: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

and is this better than the 4550?



Just wanted to know how it went with installing the 4550 does it fit? does it run with the 220 psu and does it get hot? is it the sapphire 100252 HDMI Hd4550? Thank you very much
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January 13, 2011 12:41:35 AM


I am in need of a PSU for the SX2800-01 also, haven't found one that will work yet but I did upgrade to 8GB of much better RAM then came stock in the Gateway SX2800 line. I also put a Radeon HD5450 1GB GPU(20w ,35w w/full load). This card had very little gain over the Intel Integrated X4500 onboard graphics. Windows Exp. Index went from 4.6 to 5.4( graphics and gaming equal with both!). So I returned the 5450 and got the new HIS Radeon HD5570 2GB and boom big results low wattage and fits perfect. Heatsink cooled and does well, never over 65 degrees C. Full load its around 45watts draw on the psu! $89.99


1st-GPU- http://www.newegg.com/Product/Product.aspx?Item=N82E168...

2nd-GPU- http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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