My first A7N8X question

[dgk]

Well two. I bought the A7N8X DX version 2 yesterday and started
setting up the new machine. Bios is still 1005 I think (not home now).
The power supply is an Enlight 420 or 430. Seemed adequate. But the
Bios doesn't show the fan speed for the power supply header. The wire
from the PSU is plugged into the right spot and the CPU and Case fans
both show. That's question number 1. Why isn't it showing? I thought
of this today because I followed Ben's link to the MBM faq and
remembered it.

Also, one time while watching the hardware monitor in the bios I
noticed that the CPU temp was jumping from 28c to 15c and back and
forth, mostly sitting on 15c. Now since the temp in the room was far
closer to 28c I figured it was just nuts. But it only happened that
one time. After rebooting it was consistently around 27-29c. Not oc
very much yet, I just bumped the fsb up to maybe 175. Mostly I was
getting around to installing the OS (win2003 enterprise - a bit
overkill for a home machine but I have this free 25 user copy so why
not?) Oh, that was question number 2. Why did it jump like that. HSF
is a Zalman 7000AiCu with AS5. Very quiet. You don't even notice it
over the 7 other fans. 2 in PSU, one in side, 2 front intake, 2 rear
exhaust. That's nuts. I'm going to replace a bunch with the
www.liquidsilence recommended Panaflo 80mm high outputs. Supposedly
much lower noise levels. The thing sounds like it's getting ready to
take off.

 

[Ben Pope]

Well two. I bought the A7N8X DX version 2 yesterday and started
setting up the new machine. Bios is still 1005 I think (not home now).
The power supply is an Enlight 420 or 430. Seemed adequate. But the
Bios doesn't show the fan speed for the power supply header. The wire
from the PSU is plugged into the right spot and the CPU and Case fans
both show. That's question number 1. Why isn't it showing? I thought
of this today because I followed Ben's link to the MBM faq and
remembered it.

Can't sense speeds below ~1800RPM IIRC, if you're doing it from MBM5 you can
go into the fan setup and adjust the multipliers and prescalers there...
that should sort it.

Also, one time while watching the hardware monitor in the bios I
noticed that the CPU temp was jumping from 28c to 15c and back and
forth, mostly sitting on 15c. Now since the temp in the room was far
closer to 28c I figured it was just nuts. But it only happened that
one time. After rebooting it was consistently around 27-29c. Not oc
very much yet, I just bumped the fsb up to maybe 175. Mostly I was
getting around to installing the OS (win2003 enterprise - a bit
overkill for a home machine but I have this free 25 user copy so why
not?) Oh, that was question number 2. Why did it jump like that.

Dunno, but it seems to be ~half of the usual speed, maybe a dodgy contact or
rev sensor. Can't think of anything straight off... what speed is the fan
running at?

HSF
is a Zalman 7000AiCu with AS5. Very quiet. You don't even notice it
over the 7 other fans. 2 in PSU, one in side, 2 front intake, 2 rear
exhaust. That's nuts. I'm going to replace a bunch with the
www.liquidsilence recommended Panaflo 80mm high outputs. Supposedly
much lower noise levels. The thing sounds like it's getting ready to
take off.

Much of the noise can be reduced by decoupling the fan from its mount, you'd
be surprised how much noise an 20dB fan can make when bolted to a big case.

Ben

 

[Kyle Brant]

I have in the past had problems connecting certain brand PS fan speed
signals to mobos, and it appeared as if the PS tach signal was not
compatible with the mobo. As to Q2, on rare occasion I've seen
erroneous readings also with more than one mobo.

--
Best regards,
Kyle
| Well two. I bought the A7N8X DX version 2 yesterday and started
| setting up the new machine. Bios is still 1005 I think (not home
now).
| The power supply is an Enlight 420 or 430. Seemed adequate. But the
| Bios doesn't show the fan speed for the power supply header. The
wire
| from the PSU is plugged into the right spot and the CPU and Case
fans
| both show. That's question number 1. Why isn't it showing? I thought
| of this today because I followed Ben's link to the MBM faq and
| remembered it.
|
| Also, one time while watching the hardware monitor in the bios I
| noticed that the CPU temp was jumping from 28c to 15c and back and
| forth, mostly sitting on 15c. Now since the temp in the room was far
| closer to 28c I figured it was just nuts. But it only happened that
| one time. After rebooting it was consistently around 27-29c. Not oc
| very much yet, I just bumped the fsb up to maybe 175. Mostly I was
| getting around to installing the OS (win2003 enterprise - a bit
| overkill for a home machine but I have this free 25 user copy so why
| not?) Oh, that was question number 2. Why did it jump like that. HSF
| is a Zalman 7000AiCu with AS5. Very quiet. You don't even notice it
| over the 7 other fans. 2 in PSU, one in side, 2 front intake, 2 rear
| exhaust. That's nuts. I'm going to replace a bunch with the
| www.liquidsilence recommended Panaflo 80mm high outputs. Supposedly
| much lower noise levels. The thing sounds like it's getting ready to
| take off.

 

[AJ]

Well two. I bought the A7N8X DX version 2 yesterday and started
setting up the new machine. Bios is still 1005 I think (not home now).
The power supply is an Enlight 420 or 430. Seemed adequate. But the
Bios doesn't show the fan speed for the power supply header. The wire
from the PSU is plugged into the right spot and the CPU and Case fans
both show. That's question number 1. Why isn't it showing? I thought
of this today because I followed Ben's link to the MBM faq and
remembered it.

Also, one time while watching the hardware monitor in the bios I
noticed that the CPU temp was jumping from 28c to 15c and back and
forth, mostly sitting on 15c. Now since the temp in the room was far
closer to 28c I figured it was just nuts. But it only happened that
one time. After rebooting it was consistently around 27-29c. Not oc
very much yet, I just bumped the fsb up to maybe 175. Mostly I was
getting around to installing the OS (win2003 enterprise - a bit
overkill for a home machine but I have this free 25 user copy so why
not?) Oh, that was question number 2. Why did it jump like that. HSF
is a Zalman 7000AiCu with AS5. Very quiet. You don't even notice it
over the 7 other fans. 2 in PSU, one in side, 2 front intake, 2 rear
exhaust. That's nuts. I'm going to replace a bunch with the
www.liquidsilence recommended Panaflo 80mm high outputs. Supposedly
much lower noise levels. The thing sounds like it's getting ready to
take off.

Probe is far from perfect. Watch it with one eye shut. If it bothers
you a lot try one of the many other version numbers.

 

[dgk]

Probe is far from perfect. Watch it with one eye shut. If it bothers
you a lot try one of the many other version numbers.

No, not probe. I know not to bother with that. This is just the Bios.

 

[Lopaka]

Bios doesn't show the fan speed for the power supply header. The wire

from the PSU is plugged into the right spot and the CPU and Case fans
both show. That's question number 1. Why isn't it showing? I thought
of this today because I followed Ben's link to the MBM faq and
remembered it.

My power supply only came with a 2 wire connector for
use with PWR_FAN header which of course means there is no
tach lead (3 wire).

Enermax EG 365 350 watts
--
Specs:
AMD 2600+ ASUS A7N8X DLX 2.0 NForce2 Bios 1005 W98se
512M DDR 400 Single (Kingston)
GeForce4 MX 440
Antec PlusView1000 AMG case
3Com Lan Enermax EG 365 350 watts

 

[dgk]

Bios doesn't show the fan speed for the power supply header. The wire

My power supply only came with a 2 wire connector for
use with PWR_FAN header which of course means there is no
tach lead (3 wire).

Enermax EG 365 350 watts

Bingo. Mine is 2 wire also but I figured it must be the tach and
ground wire (since the PSU is, after all, the PSU and wouldn't need
power). The two wires are the outer two if I recall correctly.

Well, what is the point of connecting at all then? I mean, it doesn't
need the power to turn, does it? I'm at work so can't look at it now.

 

[Ed]

Bingo. Mine is 2 wire also but I figured it must be the tach and
ground wire (since the PSU is, after all, the PSU and wouldn't need
power). The two wires are the outer two if I recall correctly.

Well, what is the point of connecting at all then? I mean, it doesn't
need the power to turn, does it? I'm at work so can't look at it now.

My PSU is the same way, one black and one blue wire, PSU fan is powered
by the PSU itself, be sort of stupid if it wasn't IMO. Like we don't
have enough wires already to route inside the case, I never connected
mine. ;p
Ed