I'm getting ready to finally pick up my components. I'm just still in doubt
about my PSU / case. Originally I ordered the Antec Atlas, which includes an
Antec Truepower 2.0 550Watt. http://www.cluboverclocker.com/revie...tlas/index.htm
This PSU features two 12V rails, each offering 19 amps (total 35 I think).
It's powerful enough, I guess, but not the most advanced powersupply
available. (No active PFC)
Thomas wrote:
> I'm getting ready to finally pick up my components. I'm just still in doubt
> about my PSU / case. Originally I ordered the Antec Atlas, which includes an
> Antec Truepower 2.0 550Watt.
> http://www.cluboverclocker.com/revie...tlas/index.htm
>
> This PSU features two 12V rails, each offering 19 amps (total 35 I think).
> It's powerful enough, I guess, but not the most advanced powersupply
> available. (No active PFC)
>
> I'm now also looking at the Cooler Master iGreen series, 500 or 600 Watts.
> These have higher efficiency and three 12V rails.
> http://www.coolermaster-usa.com/Products.aspx?pid=1231
>
> Total amps is comparable to the True Power 2.0. The power rating on the
> rails is less, though: 19.5 max each, but only 16, 14 and 8 amps continuous.
>
> Can anyone give me a good recommendation which PSU to choose?
>
> I'm going to overclock an E4300 with 2 GB of memory, 1 or 2 harddisks, an
> 8800GTS-320, and one optical drive.
>
> Thanks in advance,
>
Say 125W for the overclocked processor (assumes 3GHz, some Vcore boost).
(125W/12V)*(1/0.90) = 11.6 amps from the processor rail.
33.2W/12V = 2.77A from PCI Express x16 socket contacts.
65.4W/12V = 5.45A from the Aux Power connector on the 8800GTS-320
I'm *guessing* that the way the max is stated, that the supply
uses a common rail for all three outputs. Otherwise, I'd be concerned
as to how the output rails are wired to the various loads.
Your total +12 is probably around 23 amps and fairly well
split between processor and the rest. The Antec is fine.
The Coolermaster is fine too, as long as you don't
take their "continuity" rating seriously.
The PCI Express 2x3 connector in item 5.4, runs from 12V1.
The main 24 pin connector runs from 12V1 as well. Thus your
video card would draw 2.77+5.45 if using those two power
sources, or 8.22A. Two HDD, one ODD, three fans, draws
about 0.6+0.6+1.5+0.5 more from 12V1. Total so far is
11.42A from 12V1. And the 2x2 ATX12V which powers the
processor from 12V2, supplies 11.6 amps to run your E4300
at 3GHz. Which means the third rail is unused.
Because the Coolermaster manual mentions "double forward
switching", the supply might be manufactured by Seasonic.
'Thomas' scribed, in part:
| I'm getting ready to finally pick up my components. I'm just still in
doubt
| about my PSU / case. Originally I ordered the Antec Atlas, which includes
an
| Antec Truepower 2.0 550Watt.
I'm using an Antec Neo HE 550 (EVGA 680i/E4300/8800GTS). This supply has
three + 12 VDC @ 18 Amperes and a maximum + 12 VDC power capacity of 500
Watts. The total power capacity is 550 Watts. The price via Internet is
about $110 US. This power supply has modular cables and should be
sufficient for any system except for dual 8800 GTX systems.
The Antec True Power 2.0 550 Wattt supply seems to be obsolete and no longer
appears on the Antec web site.
Phil Weldon wrote:
> > I'm getting ready to finally pick up my components. I'm just still
> > in doubt about my PSU / case. Originally I ordered the Antec Atlas,
> > which includes an Antec Truepower 2.0 550Watt.
>
> I'm using an Antec Neo HE 550 (EVGA 680i/E4300/8800GTS). This supply
> has three + 12 VDC @ 18 Amperes and a maximum + 12 VDC power capacity
> of 500 Watts. The total power capacity is 550 Watts. The price via
> Internet is about $110 US. This power supply has modular cables and
> should be sufficient for any system except for dual 8800 GTX systems.
>
> The Antec True Power 2.0 550 Wattt supply seems to be obsolete and no
> longer appears on the Antec web site.
About the Truepower 2.0: it's powerful enough to power the one GTS, but it's
not fitted to run two. That's why I'm so doubtful.The Cooler Master seems
interesting, but the third 12V rail is too weak (max 8 amps continuous,
where the GTS needs 10 to 11).
I'm actually beginnning to think about the truepower trio 430, which has 16
amps on all it's three rails (but only 32 max combined).
Well, I'll see which PSU 'feels' best tomorrow :-)
'Thomas' scribed"
| About the Truepower 2.0: it's powerful enough to power the one GTS, but
it's
| not fitted to run two. That's why I'm so doubtful.The Cooler Master seems
| interesting, but the third 12V rail is too weak (max 8 amps continuous,
| where the GTS needs 10 to 11).
|
| I'm actually beginnning to think about the truepower trio 430, which has
16
| amps on all it's three rails (but only 32 max combined).
_____
The True Power Trio 430 would seem to be inadequate for systems with more
than one 7800 and higher graphics adapters.
If I were contemplating eventually upgrading to two graphics adapters in the
8800 GTX class I would go with a 650 Watt supply with three +12 VDC rails.
Otherwise a 550 Watt supply with three +12 VDC rails would be my choice for
two graphics adapters up to 8800 GTS. I have seen power supplies that boast
'single rail' +12 VDC. These may be more convenient for calculation power
sufficiency, but according to the specifications of ATX +12 ver. 2.02 no
rail should provide more than 240 VA.
"3.4.4. Over-current Protection
Overload currents applied to each tested output rail will cause the output
to trip before
reaching or exceeding 240 VA. For testing purposes, the overload currents
should be
ramped at a minimum rate of 10 A/s starting from full load."
I had much rather have a supply that trips at a + 12VDC overload at 240
Watts than one that will not trip until an overload of ~ 500 Watts or more.
I would avoid any supply with fewer than three +12 VDC rails if more than
one 8800 class graphics adapter may eventually be installed
I have two Enlight EN-8950 cases, one of which I use for my new EVGA
680i/E4300/8800 GTS system. I've used the cases for five years or so, and
am very satisfied. The big advantage is the large interior volume. There
is ~ 7 inches between the forward edge of an ATX motherboard and the rear
of even the largest drives. My original purchase cost was about $100 US
each. The case has 9 front access 5 1/2 inch drive bays and a 120 mm fan
fits nicely into either the top three or bottom three bays. There is a
knock-out panel in the door in front of the three center bays so that
removable media drives can be conveniently accessed. See ENlight Web Site
for details. Current on-line price is ~ $110 US.
I've had great luck with the OCZ Powerstreams, both 600 and
700W. Rock solid voltages even under massive load changes,
long power leads and virtually silent 12cm fans. They're actually
tweaked Fortron OEMs.
"Thomas" <ThomasH@lycosmail.nl> wrote in message news:46324a68$0$16950$9a622dc7@news.kpnplanet.nl.. .
> I'm getting ready to finally pick up my components. I'm just still in doubt
> about my PSU / case. Originally I ordered the Antec Atlas, which includes an
> Antec Truepower 2.0 550Watt.
> http://www.cluboverclocker.com/revie...tlas/index.htm
>
> This PSU features two 12V rails, each offering 19 amps (total 35 I think).
> It's powerful enough, I guess, but not the most advanced powersupply
> available. (No active PFC)
>
> I'm now also looking at the Cooler Master iGreen series, 500 or 600 Watts.
> These have higher efficiency and three 12V rails.
> http://www.coolermaster-usa.com/Products.aspx?pid=1231
>
> Total amps is comparable to the True Power 2.0. The power rating on the
> rails is less, though: 19.5 max each, but only 16, 14 and 8 amps continuous.
>
> Can anyone give me a good recommendation which PSU to choose?
>
> I'm going to overclock an E4300 with 2 GB of memory, 1 or 2 harddisks, an
> 8800GTS-320, and one optical drive.
>
> Thanks in advance,
>
> --
> Met vriendelijke groeten, Thomas vd Horst.
>
>
The calculator at
*http://www.journeysystems.com/power_...alculator.php*
is of little use for any system with components out in the last two years.
The latest Intel CPU covered is the 570 and the latest graphics adapter is
the 6800 Ultra. Memory is not included in the calculation.
The power supply calculator at eXtreme Outer Vision
is much more up to date, but in my opinion it gives a calculated estimate
that is 30% high for the system requirements I have run. The same source
provides a more complex calculator for $1.95 US per day, $3.95 per month; I
find that a bit much for so little.
Phil Weldon
Last edited by davy : 04-28-2007 at 09:27 AM.
Reason: avoid advert in the URL link when copied
Phil Weldon wrote:
> > About the Truepower 2.0: it's powerful enough to power the one GTS,
> > but it's not fitted to run two. That's why I'm so doubtful.The
> > Cooler Master seems interesting, but the third 12V rail is too weak
> > (max 8 amps continuous, where the GTS needs 10 to 11).
> >
> > I'm actually beginnning to think about the truepower trio 430,
> > which has 16 amps on all it's three rails (but only 32 max
> > combined).
> _____
>
> The True Power Trio 430 would seem to be inadequate for systems with
> more than one 7800 and higher graphics adapters.
>
> If I were contemplating eventually upgrading to two graphics adapters
> in the 8800 GTX class I would go with a 650 Watt supply with three
> +12 VDC rails. Otherwise a 550 Watt supply with three +12 VDC rails
> would be my choice for two graphics adapters up to 8800 GTS. I have
> seen power supplies that boast 'single rail' +12 VDC. These may be
> more convenient for calculation power sufficiency, but according to
> the specifications of ATX +12 ver. 2.02 no rail should provide more
> than 240 VA.
<snip>
> I have two Enlight EN-8950 cases, one of which I use for my new EVGA
> 680i/E4300/8800 GTS system. I've used the cases for five years or
> so, and am very satisfied. The big advantage is the large interior
> volume. There is ~ 7 inches between the forward edge of an ATX
> motherboard and the rear of even the largest drives. My original
> purchase cost was about $100 US each. The case has 9 front access 5
> 1/2 inch drive bays and a 120 mm fan fits nicely into either the
> top three or bottom three bays. There is a knock-out panel in the
> door in front of the three center bays so that removable media drives
> can be conveniently accessed. See
> http://nl.enlightcorp.com/Product/Pr...il.aspx?ID=236
> for details. Current on-line price is ~ $110 US.
THe shop I'm going to visit doesnt have the Enlights. They look ^%*$& cool
though :-)
The power supply calculator at eXtreme Outer Vision
is much more up to date, but in my opinion it gives a calculated estimate
that is 30% high for the system requirements I have run. The same source
provides a more complex calculator for $1.95 US per day, $3.95 per month; I
find that a bit much for so little.
Phil Weldon
Thanks Phil.... I got 'my' link from the Ref section on the old board in the computer help desk section.... think it need's an update.
Which PSU? 
Linear Mode
