Re: A8N SLI Follow-up

On Fri, 29 Feb 2008 17:55:46 GMT, "name" <vjcdsl@xxxxxxxxxxx> wrote:


"John Lewis" <john.dsl@xxxxxxxxxxx> wrote in message
news:47c8362e.1429424@xxxxxxxxxxxxxxxxxxx
On Wed, 27 Feb 2008 02:03:44 GMT, "name" <vjcdsl@xxxxxxxxxxx> wrote:


"John Lewis" <john.dsl@xxxxxxxxxxx> wrote in message
news:47c4828e.4501581@xxxxxxxxxxxxxxxxxxx
On Mon, 25 Feb 2008 01:04:02 GMT, "name" <noone@xxxxxxxxxx> wrote:


I received a new 8600 GT from BFG and had the same problem with OS
lockups
on both XP and Vista, both 32 bit.
I checked everthing, BIOS settings, SLI card between PCIe slots, latest
NVidia drivers, ran CCleaner to get rid of the
previous ATI drivers and all to no avail. After some more research I
believe I found the problem, although the solution
is a new MB.

Apparently, some PCIe 2.0 vids do not work well with some PCIe 1.0
slots.
It's an interface problem. My rig is over 3
years old and I've been wanting to upgrade anyway and this problem tells
me
it's time to upgrade.

Thanks for your all your help.
john



your problem may be much simpler. Please specify all of the hardware
in your system, including CPU. If your rig is > 3 years old, I suspect
that the +12V supply may not be able to handle the load. The +12V is
the principal supply that powers the CPU, any modern video card, your
hard-disk(s), DVD/CD rom-drives.Typical symptom of insufficient +12V
current is the general flakiness that you describe. Highly unlikely
that the PCIe2.0 spec on the 8600 has anything to do with the problem.
I keep close track of reports of any such interface problems and yours
is the first speculation of that, especially with the A8N-SLI. I have
a A8N32-SLI and it runs flawlessly with a 8800GT (PCIe 2.0)....

John Lewis

John Lewis


My rig has the following:

Antec 430W with a 24 pin power connector and a 4 pin CPU connector,
A8N-SLI Proactive Series,
AMD 4200 CPU,
2x1GB medium performance PC3200 OCZ RAM,
ATI Radeon X300 Video Card,
1 Memorex DVD on PATA,
2-36GB WD Raptors on SATA,
1 Floppy,
1 WinTV USB2 card,
1 Samsumg 226BW and 1 Samsung 932B on the X300.

Bios is at default settings (no OC'ing) and in BIOS and Asus Probe all
temps
are fine.
Except for the MB which is 2 1/2 yrs old and the CPU which 3 yrs old,
everything else is 3 1/2 yrs old.

Do you think a new 550 or 650 power supply could solve this?

TIA,
john






What is the +12V current rating on your Antec supply ????

+12v +12v -12v

0.18A 0.15A 1.0A

I assume you really mean 18 amps and 15 amps max on the +12V ??
In which case, it should be quite sufficient.

The -12V is not used by your system.



0.4A 0.4A 0A

Asus probe reads +12.0 at 11.84V

Those Raptors will guzzle quite a bit of surge current. The max +12V
current they will guzzle should be on the label.

5VDC 0.70A
12VDC 0.75A


That's also fine.

Before running out and getting a new power-supply, you should first
try reducing the current by removing non-essentials that potentially
load the +12V and see if the stability problems go away.

I'm down to one Raptor and one Maxtor drive


Good.

For example, If you remove the Radeon and use just the 8600 on its
own, do you still get the instability?

Yes


BAD.

Do you get the BSODs in any Desktop Apps, or only when you are running
3D games?

Are your Raptors in RAID0 ( If so, an overkill on your system
btw...the potential disadvantages outweigh the advantages. )
If not, you might try disconnecting one of the disks to reduce the
+12V power-consumption and see if stability returns.

No RAID used.

Or if you underclock the processor you will also reduce the +12V
current.

I'll try that

Some smart experimenting might at least give a better pointer to the
problem.

I'll experiment and get back to you

thanks again,
john



John Lewis


.

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