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Need help before buying psu please

C

Culvin

n00b
Joined
May 22, 2005
Messages
4
After doing a bit of reading/research, I have a couple of questions before I buy a psu. It will be to power a P4 2.4C (800FSB) and Nvidia 6600GT. I won't be upgrading again before buying a new computer, so I'm just going to stick with a quality 350w+ (I'm also on a budget).

1) Will my older mb that doesn't have PCIex or a 24pin connector use both rails of a dual 12v rail psu? ASUS P4SD-LA

Or would I be better off getting a psu with a single 12v rail?

2) What type of fan would be best on the psu for my system?

I have an HP retail machine. It has one small vent on each side of the tower, on the upper front of each side. My current 250w psu that it came with has one 80mm fan on the back. The back of my case as a 120mm(?) fan just below my power supply, parallel to it. My processor has an 80mm(?) fan that is also just below my power supply, but perpendicular to it.

I like what I hear about the 120mm fan that some brands like Seasonic and Fortron put on the bottom of their psu. But I'm worried that it might interfere with my case fan and/or cpu fan that would be close to it.
 
To answer your first question, yes, the new ATX12V v2.0 power supplies would be used to full potential on your board. You've got the square 4-pin power connection, which indicates that the +12V rail will get its own source of power. The extra 4-pins in the 24-pin connection will go through an adapter or just not be connected, no worries.

The second question is a little different. Do you know for a fact that the PSU is in fact an ATX PSU? From what you're saying, it does sound like a regular-spec PSU, just a pretty generic one. The 120mm fans that are mounted inside the PSU shouldn't interfere with anything in the case, unless you've got less than zero room between the top of the motherboard and the bottom of the PSU. Does the case have excessive ducting that may interfere with the PSU?

Just to throw out there: http://www.newegg.com/Product/Product.asp?Item=N82E16817104963
 
Well, when I called HP I was told that I could simply swap out the psu for any ATX supply. I'm not too experienced at this sort of thing yet, but my psu does look exactly the same shape as the pics I see at newegg.

The case has not been modded at all -- ducting shouldn't be a problem.

Thanks for the psu suggestion, I've definitely been looking at Fortron and Seasonic the most (along with quality, I'm looking for something quiet). I've been planning on getting a Seasonic Super Silencer 350w. It has the same one 80mm fan on the back like my current psu, which I'm not sure if that's a good thing or not. I was asking about the fans because if one 120mm fan on the bottom would be better for my system, I'd go ahead and get something like that Fortron instead.

My psu isn't touching my mobo or anything. But both of the other two fans in my system are right below my psu (fairly close), which is why I was worried a 120mm psu fan might interfere with the airflow.
 
The Seasonic will be quieter, that's a given. It will flow less air, but you've already got a dedicated case exhaust.
 
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