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From: Paul on 13 Jun 2008 22:48
DaveW wrote:
> Most consumer grade motherboards do NOT like having all four RAM slots
> populated; it tends to result in timing problems for the RAM. You are MUCH
> better off using two 2 GB sticks to get 4 GB of RAM total.
>

My machine runs four sticks at the same speed as two sticks.
And doesn't even break a sweat.

With Intel, this may be due to the use of 2T command rate at
all times. If a Northbridge design is set up that way, that
provides plenty of compensation for the extra bus loading
of four sticks.

Paul
From: gg on 13 Jun 2008 22:47
OT:
would consider Asus P5E-WS-PRO or maximizer consumer grade in the sense they
can not take on full load (2 sets of 2x2 matched ddr800) at full speed
(800Mhz)?
anyone has success on either of the above?

"DaveW" <radiation(a)nuclear.org> wrote in message
news:vp6dnXOiMp-HcM_VnZ2dnUVZ_r3inZ2d(a)comcast.com...
> Most consumer grade motherboards do NOT like having all four RAM slots
> populated; it tends to result in timing problems for the RAM. You are
MUCH
> better off using two 2 GB sticks to get 4 GB of RAM total.
>
> --
> --DaveW
>
>
> "(PeteCresswell)" <x(a)y.Invalid> wrote in message
> news:cbh55418fse3cfn3i547cvanmp6eos203v(a)4ax.com...
> > Old Memory: two 512-meg Crucial DDR 400
> >
> > New Memory: four 1-GB Crucial DDR UNBUFF DIMM 128mx64
> >
> > At initial boot with the new memory the MB issued something about
> > not buying the existing over clocking settings (which I never set
> > - I assume there was something set at the factory).
> >
> > I hit F2 "To restore defaults" and it booted ok and Windows XP
> > Pro started up.
> >
> > Ran a benchmark before/after and the numbers were slightly worse
> > *after*.
> >
> > Then, at a subsequent Windows XP Pro startup, it began throwing a
> > Found New Hardware Wizard for "RAID Controller".
> >
> > Anybody got an idea of what might be going on?
> > --
> > PeteCresswell
>
>


From: Sudsy on 14 Jun 2008 10:24
On Jun 13, 6:03 pm, "DaveW" <radiat...(a)nuclear.org> wrote:
> Most consumer grade motherboards do NOT like having all four RAM slots
> populated; it tends to result in timing problems for the RAM. You are MUCH
> better off using two 2 GB sticks to get 4 GB of RAM total.

I've got 4x1GB in my M2AVM HDMI and it works just fine. With an AMD
64X2
5600+ and RHEL4 running in SMP mode, this thing positively screams!
Oracle performance is simply amazing with 2x250 GB SATA II drives...
From: (PeteCresswell) on 15 Jun 2008 21:03
Per (PeteCresswell):
>Then, at a subsequent Windows XP Pro startup, it began throwing a
>Found New Hardware Wizard for "RAID Controller".

Can anybody comment on probable cause for the RAID Controller new
hardware wiz?

I tried pointing it to various folders on the disc that came with
the board, but no luck.
--
PeteCresswell
From: Paul on 15 Jun 2008 22:52
(PeteCresswell) wrote:
> Per (PeteCresswell):
>> Then, at a subsequent Windows XP Pro startup, it began throwing a
>> Found New Hardware Wizard for "RAID Controller".
>
> Can anybody comment on probable cause for the RAID Controller new
> hardware wiz?
>
> I tried pointing it to various folders on the disc that came with
> the board, but no luck.

I did a few experiments here. Normally, I keep my PDC20378 disabled.
I enabled it in RAID mode first. I got the Hardware Wizard, and it was
reporting s "RAID Controller", which sounds like what you're seeing.

Using Everest, on my P4C800-E Deluxe, it shows as

105A-3373 (VEN/DEV)
1043-80F5 (Asus,P4C800-E - this is the eight character "subsys" field)
0104 RAID Class.

Your subsys value will be different than mine, in the last four hex digits.

Next, I rebooted, and set the PDC20378 to IDE mode. Basically,
all the symptoms appear the same. The Hardware Wizard is still
looking for a "RAID Controller driver", and the Everest enumeration
remains exactly the same.

Another thing I've noticed in the past, is the possibility that in
IDE mode, the drive still has metadata on it, as if it was a RAID
device. So chances are, it is really operated as a RAID controller.

Now, the next detail is, the nature of the driver installs. They are
"INF" types. You go to Device Manager, do an update driver, and present
a folder with the INF in it. Windows may pick up a driver there. And
with RAID devices, it may pick up the driver twice (because of the
psuedo-SCSI layer used in the interface).

The next question is, how do you change from the RAID driver, to the
IDE driver, or vice versa, when there is no "uninstall" in Add/Remove.
You may find an answer to that in Google, but I don't remember the
recipe right off hand.

http://dlsvr02.asus.com/pub/ASUS/misc/ide/pdc20378/378ata_100104528.zip

http://dlsvr02.asus.com/pub/ASUS/misc/ide/pdc20378/378raid_100137.zip

Another difference between the RAID versus the IDE setting in the BIOS,
is the BIOS module that searches for drives, changes. So the purpose
of that setting in the BIOS, might be there mainly to support booting
from a drive connected to the Promise chip.

I don't know if you can find Installshield versions of the drivers or not,
or something with an uninstall option. What a person might look for,
is a commercial version of a PCI card, with a PDC20378 strapped to it,
but I don't know if anyone made one of those or not. I keep mine disabled
most of the time (except for the odd experiment), so the thing normally
doesn't bother me. I keep it disabled, to reduce the time to POST and boot.

Paul
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