New build works with generic, but not "good" PSU

[Cuzman]

I've just built a system that includes the following:

Abit NF8 http://tinyurl.com/8vs7w
AMD Sempron 2600+
1x 512MB Crucial Ballistix
ATI Radeon 9700 Pro AIW
200GB Seagate 7200.8 SATA ST3200826AS
(...plus DVD, CDRW, FDD & case fans)

For some reason this setup won't work with the following two power supplies:

FSP 350W FSP350-60PN(PF) http://tinyurl.com/ba0i
Antec 430W True430PGB http://tinyurl.com/b9tru

The red LED on the motherboard comes on to show that power is getting
through, but nothing wants to start when I press the power button.
Using both PSUs, the CPU fan appears to "turn over" at the first attempt
but nothing after that. The power supplies are perfectly fine, as I
normally have them in two other systems.

In contrast, the system works perfectly with a crappy 350W generic
"Tsunami" PSU I have, but yet it has worse amperage levels than both the
other PSUs on every single rail. I obviously don't wish to use this PSU
in the long run, but I don't know whether to buy another new PSU. And
if I do buy another PSU, what do I buy? It could probably also not work.

I've been trying this all out on a barebones testbed, so there is no
question of anything shorting out. All the PSUs work perfectly fine in
any other system I put them in, but this NF8 is my first 24-pin
motherboard. All of my PSUs are 20-pin, so I am using a 20-to-24-pin
adapter with all of these.

I'm completely lost as to what to do. Does anyone have any advice?

 

[philo]

For some reason this setup won't work with the following two power supplies:

FSP 350W FSP350-60PN(PF) http://tinyurl.com/ba0i
Antec 430W True430PGB http://tinyurl.com/b9tru

The red LED on the motherboard comes on to show that power is getting
through, but nothing wants to start when I press the power button.
Using both PSUs, the CPU fan appears to "turn over" at the first attempt
but nothing after that. The power supplies are perfectly fine, as I
normally have them in two other systems.

In contrast, the system works perfectly with a crappy 350W generic
"Tsunami" PSU I have, but yet it has worse amperage levels than both the
other PSUs on every single rail. I obviously don't wish to use this PSU
in the long run, but I don't know whether to buy another new PSU. And
if I do buy another PSU, what do I buy? It could probably also not work.

I've been trying this all out on a barebones testbed, so there is no
question of anything shorting out. All the PSUs work perfectly fine in
any other system I put them in, but this NF8 is my first 24-pin
motherboard. All of my PSUs are 20-pin, so I am using a 20-to-24-pin
adapter with all of these.

I'm completely lost as to what to do. Does anyone have any advice?

it must be something with the adaptor and the specifics of the
"good"powersupplies...
i bet if you get a 24pin PS (and thus not have to use an adaptor) the
machine will work

 

[John]

I've just built a system that includes the following:

I've been trying this all out on a barebones testbed, so there is no
question of anything shorting out. All the PSUs work perfectly fine in
any other system I put them in, but this NF8 is my first 24-pin
motherboard. All of my PSUs are 20-pin, so I am using a 20-to-24-pin
adapter with all of these.

I'm completely lost as to what to do. Does anyone have any advice?

Try plugging them directly into the board. You plug them all the way
to the right I think. Its obvious cause the shapes of each pin
surround alternates in shape so they only plug in one way unless you
force them in. And remember to plug the extra 4 pin in too from each
PS to the board where the 4 pin goes in.

I never use adaptors and all my PSes even the new ones I bought
recently are still 20 pin.

 

[jim dorey]

For some reason this setup won't work with the following two power
supplies:

FSP 350W FSP350-60PN(PF) http://tinyurl.com/ba0i
Antec 430W True430PGB http://tinyurl.com/b9tru

how many amps from each set of voltages does the oem give out, and what
does the motherboard manual say it needs for each? it may be that one of
the required sources is low in the 'good' ones cause they're built for a
different class of board.