PSu sufficent or not?

  • Thread starter Thread starter Olav Rekve
  • Start date Start date
O

Olav Rekve

is 300 W PSU sufficent when i have this:
and want to replace the 900 crap card with X700 or X800XL?
Crappy 915 chipset
I have a P4 3.4 ghz prescott
2 x 250 GB SATA with 8 MB Ram from WD
1 GB DDR 3200 RAM
Gigabit Ethernet
Win XP PRO
the sucky Shared 900 graphic card that i was planning to swap out wi8th the
X700 or X800XL
 
" is 300 W PSU sufficent when i have this: "


Did you have to start a new thread? No.

Is a 300W PSU sufficient for your system? I would say not.
 
Yeah , you need enough amps on the 3.3 5 and 12Volt rails , like 30A
40A and 30A or so , something less is ok but not too much less , lik
28 A 48A and 30A , or thereabouts .
MSI graphics card ? Have a look on the MSI forum . Search MSI ....
find something with a tw on the end and in the main website across th
top will be a selection , products and about 8 other choices , mov
the mouse over them to about the 6th choice along and in one of the
you will find Forum .
Click on Forum and register on the forum and ask there
 
A 300 watt power supply that really does provide 300 watts
would probably be sufficient. However, how much did you pay
for it? Less than $65 full retail? Then suspect it is
missing essential functions and is problem not really a 300
watt supply.

Furthermore that supply could be 300 watts - but not output
sufficient watts on one key voltage. Kony describes same when
discussing power rails. Your answer starts by providing
wattage or current output for each voltage. An overall 300
watts tells us little useful.

IOW with the information provided, then your only answers
will only be speculation. Those who could really answer your
question remain lurkers due to insufficient numbers. We don't
even know if that power supply really is 300 watts. Even that
video card is not listed with power consumption for each
voltage.
 
Olav Rekve said:
is 300 W PSU sufficent when i have this:
and want to replace the 900 crap card with X700 or X800XL?
Crappy 915 chipset
I have a P4 3.4 ghz prescott
2 x 250 GB SATA with 8 MB Ram from WD
1 GB DDR 3200 RAM
Gigabit Ethernet
Win XP PRO
the sucky Shared 900 graphic card that i was planning to swap out wi8th
the
X700 or X800XL
Click to expand...

The 5v VSB must be rated at 2.0A for LGA 775 chips and PCI Ex.















--
Chris
Technical director CKCCOMPUSCRIPT
Apple Computers, Intel, Roland audio, ATI, Microsoft, Sun Solaris, Cisco and
Silicone Graphics.
Wholesale distributor and specialist audio visual computers and servers
FREE SUPPORT @,
http://www.ckccomp.plus.com/site/page.HTM
(e-mail address removed)
 
is 300 W PSU sufficent when i have this:
and want to replace the 900 crap card with X700 or X800XL?
Crappy 915 chipset
I have a P4 3.4 ghz prescott
2 x 250 GB SATA with 8 MB Ram from WD
1 GB DDR 3200 RAM
Gigabit Ethernet
Win XP PRO
the sucky Shared 900 graphic card that i was planning to swap out wi8th the
X700 or X800XL
Click to expand...


You did not mention the specific power supply make and model
but in general, I would get at least a 350W name-brand PSU
for those parts, preferribly 400W. Seek (in a good
name-brand) at least 18A capacity on the 12V rail. A
generic with higher rating might not be trustworthy.
 
kony said:
You did not mention the specific power supply make and model
but in general, I would get at least a 350W name-brand PSU
for those parts, preferribly 400W. Seek (in a good
name-brand) at least 18A capacity on the 12V rail. A
generic with higher rating might not be trustworthy.
Click to expand...

Would been great if u could come wtih some examples and if u know any in
canada which i can combine with a grahic card so it goes as max 350 cdn??
THanks
 
No, 300 Watts is NOT enough. This is especially true for cheap power supply
units which are built with substandard parts.
 
Would been great if u could come wtih some examples and if u know any in
canada which i can combine with a grahic card so it goes as max 350 cdn??
THanks
Click to expand...

I dont' know the canadian market nor what's available where
you'd shop for a graphics card. I like Sparkle/Fortron for
bang-for-buck but Antec and a few others would be sufficient
too, in the ~400W range I mentioned. SInce you have a
power-hungry CPU that will tend to put large change in
current demand on the 12V rail, 'tis better to go with
400W+.
 
kony said:
I dont' know the canadian market nor what's available where
you'd shop for a graphics card. I like Sparkle/Fortron for
bang-for-buck but Antec and a few others would be sufficient
too, in the ~400W range I mentioned. SInce you have a
power-hungry CPU that will tend to put large change in
current demand on the 12V rail, 'tis better to go with
400W+.
Click to expand...

The Antec True380 I recommended in my above post has 24A on the 12v:
http://www.antec.com/specs/true380_spe.html
 
The Antec True380 I recommended in my above post has 24A on the 12v:
http://www.antec.com/specs/true380_spe.html
Click to expand...


Yes, but it can't be compared to some other brands' amperage
because that is a peak, not sustained rating. Note on your
link that it also shows max total combined output of 360W,
but if we give all the rails the same weighting as the spec
antec provides,

24A @ 12V = 288
35A @ 5V = 175
28A @ 3.3V = 92.4
-----------------------
555W

Plus, having too small a transformer is another sign it's
not going to have good recovery time even if someone tried
to squeeze 24A out of it by lightly loading the rest.
 
kony said:
Yes, but it can't be compared to some other brands' amperage
because that is a peak, not sustained rating. Note on your
link that it also shows max total combined output of 360W,
but if we give all the rails the same weighting as the spec
antec provides,

24A @ 12V = 288
35A @ 5V = 175
28A @ 3.3V = 92.4
-----------------------
555W

Plus, having too small a transformer is another sign it's
not going to have good recovery time even if someone tried
to squeeze 24A out of it by lightly loading the rest.
Click to expand...

What do you use?
 
Derek Baker said:
Here's an example: http://www.antec.com/us/productDetails.php?ProdID=20380

Don't know about Canada: I'm in the UK.
Click to expand...
Unfortunately Antec don't supply that PSU to US and Canadian markets with
Active Power Factor Correction though (unlike for the UK/European markets).
This means that a Canadian bought model will end up costing its owner more
in electricity bills during its use. Personally, I'd steer clear of a
company with such double standards because of this.

Paul
 
What do you use?
Click to expand...

Depends on the system?
OP has a (Prescott?) P4, I don't run those so I partly avoid
highest 12V needs, but even so I use Sparkle/Fortron when
the price is right. That is, I don't stick with one brand
but buy on spot prices. Antec will work though, but
ideally higher than a True 380 when a system has such a
large variable load on a particular rail... that's the most
difficult problem with modern systems, IMO, too many people
focus on cooling when even the retail 'sink will suffice.
 
kony said:
Depends on the system?
OP has a (Prescott?) P4, I don't run those so I partly avoid
highest 12V needs, but even so I use Sparkle/Fortron when
the price is right. That is, I don't stick with one brand
but buy on spot prices. Antec will work though, but
ideally higher than a True 380 when a system has such a
large variable load on a particular rail... that's the most
difficult problem with modern systems, IMO, too many people
focus on cooling when even the retail 'sink will suffice.
Click to expand...

I decided to take no chances when I had to upgrade from a FSP300 to cope
with my new X800 last year: I went for the True 550.
 
Back
Top