M/B recommendation for use with 9800 Pro?

[Slug]

12V is ±10%, 3.3 and 5V are ±5%, AFAIK.

Ben

OK, thx. I saw someone post in another group that 13amps on the 12v
rail should be adequate for today's machines. I bought a Zalman 400w
not long ago and it is 15amps on the 12v rail. Zalman decided that
wasn't beefy enough and they have a new version of the same 400w PSU
but with 18amps on the 12v rail. Decent and quiet PSU but it's not
exactly cheap either.

 

[How can I be down]

Here is what I'm running with only a 300watt power supply


Video= Radeon 9800 pro
Memory= 1gb PC3200 400mhz
SCSI Raid controller= AAA-131u2w raid
drives= 2 36gb 10,000rpm cheetahs Raid 0
SCSI drive controller= 29160
Drives= 4 18.2gb in an external drive cage and
Processor= AMD 2600+ Barton 333mhz
Motherboard= Giga-byte GA-7N400 Pro2 NVIDIA nForceT2 Ultra 400 this board
kick ass Highly recommended
Onboard= 10/100/1000 NIC - 6 channel sound
CD/DVD= SCSI yamaha Burner, SCSI pioneer DVD reader, and Liteon IDE 4x DVD +
and - burner

 

[dino]

that is why I bought Enermax..33 amp on the 12

 

[Robert P Drake]

12V is ±10%, 3.3 and 5V are ±5%, AFAIK.

Go have a look:

http://www.antec-inc.com/specs/true380_spe.html

12v is +/- 3% unless I'm misreading it.

 

[Robert P Drake]

OK, sorry for giving you a hard time about it. I will email Antec
myself and get clarification, even though this issue doesn't affect
me.

Can you let me know what they say?

 

[Robert P Drake]

Bear in mind that the power supply in the Sonata is _not_ the one you buy in
a box--Antec has made some mods on it to make it run quieter.

And one Antec 380S isn't the same as another 380S. I bought two, and
the power supplies are actually different (one has extra connectors
for an SATA drive and looks different too).

 

[Slug]

that is why I bought Enermax..33 amp on the 12

I used to have an Enermax365 and it caused me major grief so I got a
400w Antec and never had a problem again. Maybe I just got a duff one
though. Which model you talking about that has 33A on the 12v rail?
I'm looking at the specs on the 465 right now and it is 18amps on the
12v rail.

 

[Slug]

Can you let me know what they say?

Will do. I just sent them an email asking for clarification.

 

[Slug]

Here is what I'm running with only a 300watt power supply


Video= Radeon 9800 pro
Memory= 1gb PC3200 400mhz
SCSI Raid controller= AAA-131u2w raid
drives= 2 36gb 10,000rpm cheetahs Raid 0
SCSI drive controller= 29160
Drives= 4 18.2gb in an external drive cage and
Processor= AMD 2600+ Barton 333mhz
Motherboard= Giga-byte GA-7N400 Pro2 NVIDIA nForceT2 Ultra 400 this board
kick ass Highly recommended
Onboard= 10/100/1000 NIC - 6 channel sound
CD/DVD= SCSI yamaha Burner, SCSI pioneer DVD reader, and Liteon IDE 4x DVD +
and - burner

What brand of PSU? Not all 300W PSU's are created equal.

 

[dino]

I have 2 465FM's........but I see what you are saying...looking at the specs
on the website and the supposed"specs" stamped on the side of my newer
one..they differ...hmmm..but I will say this....when I put in my first one
on my power hungry MSI Kt400 board..what a difference it made...my CPU fan
used to slow down on reboot or games launching till I switched it up..but it
is just another of those preference things that tends to happen.
http://www.enermax.com.tw/product-01.htm

maybe I have misread..or looked in the wrong spot..but these are the 2 I
have...so which is right...the top or bottom chart?..and remember the one
spot says (250W model)..and that says greater than or equal too..for 250
watt

 

[dino]

anyways the link is not to my exact model....if you go down to the Fan
Monitor Series i have 2 of the EG465P-VE FM PSU's....the link I pasted is
just generic...sorry no help for it.

 

[Slug]

12V is ±10%, 3.3 and 5V are ±5%, AFAIK.

Ben

Someone posted this in the Abit group.

ATX 2.1 specs are as follows:
-5 10%
-12 10%
+5 5%
+12 5%
+3.3 4%
+5vsb 5%

 

[Slug]

I have 2 465FM's........but I see what you are saying...looking at the specs
on the website and the supposed"specs" stamped on the side of my newer
one..they differ...hmmm..but I will say this....when I put in my first one
on my power hungry MSI Kt400 board..what a difference it made...my CPU fan
used to slow down on reboot or games launching till I switched it up..but it
is just another of those preference things that tends to happen.
http://www.enermax.com.tw/product-01.htm

maybe I have misread..or looked in the wrong spot..but these are the 2 I
have...so which is right...the top or bottom chart?..and remember the one
spot says (250W model)..and that says greater than or equal too..for 250
watt

OK, I see where it says 33amps now. I wonder how accurate those
numbers are though. As I said, I had problems with the 365P and it
shows 26amps. How come my Zalman with only 15amps doesn't give me any
issues but the Enermax did?

 

[dino]

maybe it was just one of the bad ones...it does happen from time to time..I
started getting random reboots on my other system after putting my old
Ti4200 in it..so I went and bought the 2nd Enermax and problem solved.

 

[How can I be down]

I have 6 year old AOpen in an AOpen HX08 case

What brand of PSU? Not all 300W PSU's are created equal.

 

[Ben Pope]

Go have a look:

http://www.antec-inc.com/specs/true380_spe.html

12v is +/- 3% unless I'm misreading it.

That's what Antec say their PSU is, not what the ATX spec says it needs to
be.

ATX Spec 2.2:
http://www.formfactors.org/developer/specs/atx2_2.pdf ('03-'04)

+5VDC ± 5 %
-5VDC (if used) ± 10 %
+12VDC ± 5 %
-12VDC ± 10 %
+3.3VDC ± 5 %
+5VSB ± 5 %


ATX Spec 2.1 (June '02):
http://www.formfactors.org/developer/specs/atx2_1.pdf

+5VDC ± 5 %
-5VDC (if used) ± 10 %
+12VDC ± 5 %
-12VDC ± 10 %
+3.3VDC ± 4 %
+5VSB ± 5 %


ATX Spec 2.01 (Feb '97):
ftp://download.intel.com/design/motherbd/atx_201.pdf

+5 VDC ± 5%
-5 VDC ± 5%
+12 VDC ± 5%
-12 VDC ± 5%
+3.3 VDC ± 4%
+5VSB ± 5%


ATX12V Power Supply Design Guide Version 2.0 ('03-'04)
http://www.formfactors.org/developer/specs/ATX12V PSDG2.0 Ratified.pdf

+12V1DC ±5%
+12V2DC ±5% (1)
+5VDC ±5%
+3.3VDC ±5% (2)
-12VDC ±10%
+5VSB ±5%
(1) At +12 VDC peak loading, regulation at the +12 VDC output can go to ±
10%.
(2) Voltage tolerance is required at main connector and S-ATA connector (if
used).


ATX12V Power Supply Design Guide Version 1.3 (April '03)
http://www.formfactors.org/developer/specs/ATX12V_1_3dg.pdf

+12VDC ±5% (1)
+5VDC ±5%
+3.3VDC ±5% (2)
-12VDC ±10%
+5VSB ±5%
(1) At +12 VDC peak loading, regulation at the +12 VDC output can go to ±
10%.
(2) Voltage tolerance is required at main connector and S-ATA connector (if
used).




So thats nice and clear/consistent.

Notice that in the change from 1.3 to 2.0 of the PSU design guide, a second
12V rail has been introduced with tighter regulation. The ATX Spec 2.2
references the ATX PSU design guide 2.0, but only specifies one of these
rails.

Also, it seems that according to the PSU design guide, 10% is ok when you're
near your limit. Seems to me that a given tolerance is a given tolerance,
not sure why it should change when fully loaded - the same limits should
apply.

Lets assume everything useful (+3.3V, +5V, +12V, +5VSB) at ±5% and the
negative ones (5V, 12V) at ± 10% (since they're generally not used and
therefore unloaded)

Ben

 

[Slug]

maybe it was just one of the bad ones...it does happen from time to time..I
started getting random reboots on my other system after putting my old
Ti4200 in it..so I went and bought the 2nd Enermax and problem solved.

I guess it may have been bad, but read the below text. This reviewer
had the exact same problem with the same Enermax PSU. My vid card at
the time was an R8500 too, as his was. I never did get my Enermax
replaced. Just went out and bought an Antec and let the Enermax
collect dust in the basement. I have two PC's here and one is using
400w Antec and my designed to be quiet PC is using a 400w Zalman.
Both have stable voltages but the Antec is a bit better than the
Zalman on the +12v line. The Enermax 365 cost me $65.00 CAD, the
Zalman $150.00 CAD, I think you get what you pay for. Enermax may have
improved a lot since 2 years ago but I take their 33amps on the +12v
line with a grain of salt. That's my take on it anyway.

http://www.gamingin3d.com/articles/ps_roundup/main.shtml
Jeez, Louise! What's with the Enermax powersupplies? There's a hefty
drop on the 12V lines under load, with respective increases on the 5V
lines. They both pass within +/- 10% limit, both not my preferred
"high-quality" +/- %5 limit.

In comparison, the Zalman/Nexus duo barely break a sweat under load.
The Zalman has a SLIGHTLY better 12V line... but the difference isn't
worth writing home about. Both of them have all their lines fall
within +/- 5% of the respective line's spec, so stability issues due
to under or over voltage should be non-existent.

(side note: while the Enermax powersupplies may seem a bit weak in
comparison, they're still better than the average generic powersupply.
I used the same test on an old generic 250W I had lying around, and
the thing dipped below 10.7V on the 12V line! That's just
unacceptable...)

Another note on the Enermax powersupplies: while it seems the
newer-yet-lower-end 365 model beats down the discontinued 451 in every
conceivable way, there is a problem with it... or at least the one I
have on hand. The problem is with certain video cards. For example, if
I use my Radeon 8500 with the 365, the system will crash whenever I
try to start a game. Annoying to say the least.

You think that's the end of the Enermax story? I wish. I've been
trying to get it replaced (since it has a 2 year warranty...
supposedly), but the retailer I got it from said they only covered it
for the first year. The second year is through Enermax... Yah. Right.
Their website says to either contact the retailer (which is obviously
not an option), or if that fails, a "branch office or agent in your
area". Well, I tried all those offices and agents. Everyone of them
gave me the run-around. They would either tell me to call someone
else, that the drives are only covered for 1 year (it says 24 months
right on the box... last time I checked, that equals 2 years), or they
would tell me "we don't deal with end users". Now I'm stuck with a
problematic $50 powersupply that's under warranty, but no one will
warranty it.

 

[Slug]

p.s. Dino, have a look at that article and look at the pics of the
insides of the Zalman compared to the Enermax.