FOXCONN P9657AB No Video, No Post, no nothing

Question:

Would insufficient power to a CPU ( Intel DUO 2 at 2.4Ghz , Socket
775) prevent a bios for Posting? The led power light shows up on my
board, the fans spin, the fans on the video card (PC-Express) spin. I
will not POSTat all.

I have a power supply with a 4-PIN cpu power cable and not an 8-pin,
but the book says I can use a 4-pin, just move it over to the right
side pins. I have the 24pin board clipped in just fine.

It this why it won't even POST? Because I dont have the proper power
supply with an 8-PIN cable for the CPU power.

Erik

<info@onlyhd.tv> wrote in message
news:99e01b15-d309-4580-a024-354b11ba1ae5@y38g2000hsy.googlegroups.com...
> Question:
>
> Would insufficient power to a CPU ( Intel DUO 2 at 2.4Ghz , Socket
> 775) prevent a bios for Posting? The led power light shows up on my
> board, the fans spin, the fans on the video card (PC-Express) spin. I
> will not POSTat all.
>
> I have a power supply with a 4-PIN cpu power cable and not an 8-pin,
> but the book says I can use a 4-pin, just move it over to the right
> side pins. I have the 24pin board clipped in just fine.
>
> It this why it won't even POST? Because I dont have the proper power
> supply with an 8-PIN cable for the CPU power.
>
> Erik
>

Whos right side?

Insufficient power would not prevent the CPU from POST, but it might lock up
and or reboot during POST. What's more common is that the power supply is
not providing power_ok to the mainboard, so the CPU will not even start
POST. Short version of boot process: hit power switch, power supply starts
up, power supply sends power_ok to mainboard, which passes power_OK signal
to CPU, CPU starts running POST program from BIOS (you should hear a post
BEEP, just one if no problems), if basic POST checks don't fail, THEN video
adapter is initialized (you start to see video on monitor) and POST
continues, if POST completes, then CPU looks for OS according to settings
stored in CMOS, which can be changed by your BIOS setup program (usually
checks the "CD" drive first, then the hard drive, looking for an OS to boot)

In your specific case though, I'm betting it's that 4-pin cable on an 8-pin
connector that is the problem.

Oh, and don't be fooled by LED lamps lit or fans spinning. Both of those
things are VERY forgiving when it comes to bad voltage. This is not an
indication that your power supply is good. But then it doesn't mean
anything really. A good power supply would show the same symptoms, if
something else was preventing the POST from running.

I'd be willing to bet that a new power supply with 8-pin CPU cable built in
would do the trick. I'm surprised to hear that the manual says you can use
a 4-pin CPU power cable. But if so, are you SURE you have the right 4 pins
powered????? -Dave

Hi Erik,

I know for a fact that for the COR 2 DUO to function correctly you
will need a 600 watt power supply or bigger,
if you try with a 350watt the fans will turn and leds will burn but
you will get nothing further than that,

My advice would be to get a bigger power supply and you will probably
find that that 4 pin will now be a 8 pin,

Good luck

John

johngo@nedbank.co.za wrote:
> Hi Erik,
>
> I know for a fact that for the COR 2 DUO to function correctly you
> will need a 600 watt power supply or bigger,
> if you try with a 350watt the fans will turn and leds will burn but
> you will get nothing further than that,
>
> My advice would be to get a bigger power supply and you will probably
> find that that 4 pin will now be a 8 pin,
>
> Good luck
>
> John

Bull****.

Thanks, yes I put the 4-pin cable on per the specs in the manual.
However, I did buy a Dynex 400w ATX SATA SLI Power Supply and I can
see from John's posting that I need at least a 600, so I'll buy
another one and follow up with the groups.

As for the bull**** comment, I think I'll ignore that since there is
no explaination to backup the "bull****' call. Would Mr. Nobody like
to comment back on the bull**** call?

Thanks guys!

Erik

johngo nedbank.co.za wrote:

> Hi Erik,
>
> I know for a fact that for the COR 2 DUO to function correctly you
> will need a 600 watt power supply or bigger,

That is not necessarily true. A wattage rating by itself can be
meaningless. Actual power output can vary greatly between bad and
good power supplies that are rated the same wattage. My high-quality
380 W supply is doing just fine running a E6850. Most of the Duos
are 65 W anyway, they shouldn't require a big power supply unless
it's very cheap.













> if you try with a 350watt the fans will turn and leds will burn but
> you will get nothing further than that,
>
> My advice would be to get a bigger power supply and you will probably
> find that that 4 pin will now be a 8 pin,
>
> Good luck
>
> John
>
>
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> From: johngo nedbank.co.za
> Newsgroups: alt.comp.hardware.pc-homebuilt
> Subject: Re: FOXCONN P9657AB No Video, No Post, no nothing
> Date: Tue, 13 May 2008 06:20:35 -0700 (PDT)
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info@onlyhd.tv wrote:
> Thanks, yes I put the 4-pin cable on per the specs in the manual.
> However, I did buy a Dynex 400w ATX SATA SLI Power Supply and I can
> see from John's posting that I need at least a 600, so I'll buy
> another one and follow up with the groups.
>
> As for the bull**** comment, I think I'll ignore that since there is
> no explaination to backup the "bull****' call. Would Mr. Nobody like
> to comment back on the bull**** call?

I am not mr nobody, but since I am running a quad core Q6600 with 8GB of RAM and
3 raided 500GB hard disks on a 500W PSU I think it is reasonable to assume he
meant you don't need a 600W PSU for a dual core cpu. Of course if you have a 4
card SLI graphics setup along with 6 raided hard disks then maybe the situation
will be different.

--
Boo

sorry it showed "Nobody" on groups.google.com , thanks for the
response. I think the issue is that the board expects the 8-pin. I'm
better off buying the best stuff I can since a new system and get a
nice 650W quiet PSU with the 24-pin and 8-pin CPU connectors.

Dave wrote:

>
> I'd be willing to bet that a new power supply with 8-pin CPU cable built
> in would do the trick. I'm surprised to hear that the manual says you
> can use a 4-pin CPU power cable. But if so, are you SURE you have the
> right 4 pins powered????? -Dave

You can use a four pin (2x2 two yellow wires, two black wires) for
CPU power. The eight pin (four yellow, four black), would only be needed
if the processor power was over 130W. The four pin handles everything up
to and including 130W.

The Molex connectors have shapes on the end, which will restrict where
the four pin ATX end will fit, with respect to the eight pin on the
motherboard. So not all possible orientations work.

A good motherboard, will ship with a label stuck over the four
unused pins on the motherboard, making it easier for the user
to see which holes to use.

Generally, the only time you really need an eight pin, is if you
were doing some severe overclocking. For example, if you had a
D 805 (old Intel dual core at 2.66GHz), and overclocked it to
4GHz like Tomshardware did, for that you need about 200W of
electricity. In which case, the motherboard should have more than
four phases for Vcore (if you want it to last), and the connector
should be the eight pin variety.

(95W nominal - the 200W is because the frequency contributes 50%
more power, plus you have to raise Vcore, which accounts for additional
power above the 50% due to speed. If the Vcore could stay at nominal,
the additional power would be proportional to frequency alone.
Power is proportional to FCV**2, F=freq,V=voltage,C=capacitance, a
constant in this case.)

http://processorfinder.intel.com/det...px?sSpec=SL8ZH

Today's 65 watt dual cores, when not overclocked, are not
stressing the four pin connector at all.

Paul

thanks Paul, but I'm still at a point of not even getting a POST. The
PSU I bought is pretty crappy (not a major brand)... anyone have a
good list of reasons for NO POST? I know this beyond vauge, but I'm
at a loss now since this last great post from Paul.