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XPS 400 case and a Corsair 650w PSU

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November 25, 2009 11:22:21 PM

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

So my question is would the PSU in the link above be able to physically fit in my Dell XPS 400 case?

I am going to be putting an ati 5770 in and need a new power supply.
a c 243 ) Power supply
November 26, 2009 12:10:26 AM

Nice psu and it will fit , but you don't need an upgrade to power a 5770.
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a c 248 ) Power supply
November 26, 2009 12:45:39 AM

The general rule of thumb is a high quality 500 to 550 watt power supply with sufficient current (amps) on the 12 volt rail(s) can easily power a system with any single video card made. A high quality 700 to 750 watt power supply with sufficient current (amps) on the 12 volt rail(s) can power a system with two video cards operating in dual mode. There are a few exceptions like the new ATI Radeon HD 5XXX series cards which use less power due to their energy efficiency.

Here are the ATI recommended power supply requirements for the new ATI Radeon HD 5770 and 5750 video cards that just became available:

450 Watt or greater power supply with one 75W 6-pin PCI Express® power connector recommended

600 Watt and two 75 watt 6-pin connectors for ATI CrossFireX™ technology in dual mode

That's for the entire computer system.

Technical review:

http://www.anandtech.com/video/showdoc.aspx?i=3658

Power consumption, temperature, and noise levels are very encouraging.
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November 26, 2009 1:00:18 AM

Wow thanks for the quick responses! Just what I was looking for.

Delluser1 why do you say that I dont need to upgrade my psu to power the 5770?
I have the stock 375W psu that came with it, and the 5770 says i need at least a 450W.

I was planning on using this psu/card for my first build (but i also want them to fit in my current case), but if you're saying that i dont need the power supply right now I might wait and save me some money for the time being.

BTW if you guys would recommend a different card than the 5770, I'm all ears. My budget for a video card is <$200. $200 being the max.

Thanks again for the quick responses.
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a c 248 ) Power supply
November 26, 2009 2:25:59 AM

The video card manufacturers typically overestimate power supply requirements because they know there are a lot of people who insist on buying low budget power supplies of questionable performance and value.

Typical gamers overestimate their power requirements. There is a bigger is better mentality. The typical gamer with a system with one video card usually doesn't use more than 300 watts while playing a game. There are some exceptions.
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a c 243 ) Power supply
November 26, 2009 3:44:16 AM

MeNimrod said:


Delluser1 why do you say that I dont need to upgrade my psu to power the 5770?
I have the stock 375W psu that came with it, and the 5770 says i need at least a 450W.

I was planning on using this psu/card for my first build (but i also want them to fit in my current case), but if you're saying that i dont need the power supply right now I might wait and save me some money for the time being.

The 8800 GTS was a favorite upgrade for the XPS400, it uses 100 watts or better.

http://www.xbitlabs.com/articles/video/display/gf8800gt...

The 5770 can use just over 80 when stressed with Furmark.

http://www.xbitlabs.com/articles/video/display/radeon-h...

Unless your psu is failing there's no real need to upgrade it yet.
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January 24, 2010 2:17:51 PM

Best answer selected by MeNimrod.
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