[dba-Tech] DDR Power requirements

John W. Colby jwcolby at colbyconsulting.com
Sun Jan 16 10:06:54 CST 2005


James,

One thing you need to understand is that all manufacturers are not created
equal.  I use Antec supplies because they are a very good manufacturer and
if they say X amps on a rail, it will do that.

Having said that, I have several systems running an Athlon64 3+g processor,
3 gb (3 one gig sticks) RAM, 6 hard disk drives, a floppy, a CDRom and a
video card.  In fact the video card is one thing you MUST be aware of, the
high end cards require enough juice that they may actually require an extra
connector to the board (and a bigger supply).  The "highest end" card I have
is an ATI 9800 which is not a particularly high consumption board.  I run
these systems on Antec 350 watt supplies.

In summary, if you suspect that you need a lot of current buy a name brand
power supply, and then go for the 400w, 450w or whatever.  Do NOT think that
a $35 500w PS is going to cut it.

John W. Colby
www.ColbyConsulting.com 

Contribute your unused CPU cycles to a good cause:
http://folding.stanford.edu/

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of James Moss
Sent: Sunday, January 16, 2005 12:52 AM
To: dba-tech at databaseadvisors.com
Subject: [dba-Tech] DDR Power requirements


Thanks, Stuart. Now I'm really confused. I just sent an email to the
manufacturer, hopefully they can shed some light on the subject. I'm
assembling a system into an Antec Performance series case that has a 430
watt power supply along with an Antec 550 watt power supply as a replacement
for the 430. I swapped out the power supplies and didn't notice that I
received an EPS power supply instead of the ATX until I tried to plug into
the motherboard. I have RMA'ed the power supply but don't want to wait to
fire the system up. 

To err on the side of caution, I will just remove 2 gigs of ram and maybe 2
of the raptors before firing it up.

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Stuart McLachlan
Sent: Saturday, January 15, 2005 6:07 PM
To: Discussion of Hardware and Software issues
Subject: Re: [dba-Tech] DDR Power requirements

On 15 Jan 2005 at 15:01, James Moss wrote:

> Does anyone know the power requirements of 1gb of DDR400, or how to
> calculate watts required without having tons of information?
> 
Tricky.

Take a look at http://www.overclockers.com/articles696/

--
Stuart


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