Ram timing settings for A7N8X Deluxe?

[Don Burnette]

I currently have an Athlon XP 2800+ overclocked to 3200+ speeds 196x11.5
Asus A7N8X Deluxe Version 2.0 mb w/ latest bios.
I have 1gB of Corsair XMS matched memory 2x512 pc3200

For whatever reason, I cannot seem to get my system bus to run stable at 200
mhz or higher.
I have ram voltage at 2.7
Vcore at 1.775

I wonder if my memory timings are the problem? I ran Prime95 torture test
all night last night at my 196 setting with no errors.

I think I have my memory at 2.5-2-2-7

Any suggestions would be appreciated.

I guess it probably wouldn't make much difference at all, it just annoys me
that I cannot seem to breech the 200 mhz fsb mark.

Thanks,

 

[Paul]

I currently have an Athlon XP 2800+ overclocked to 3200+ speeds 196x11.5
Asus A7N8X Deluxe Version 2.0 mb w/ latest bios.
I have 1gB of Corsair XMS matched memory 2x512 pc3200

For whatever reason, I cannot seem to get my system bus to run stable at 200
mhz or higher.
I have ram voltage at 2.7
Vcore at 1.775

I wonder if my memory timings are the problem? I ran Prime95 torture test
all night last night at my 196 setting with no errors.

I think I have my memory at 2.5-2-2-7

Any suggestions would be appreciated.

I guess it probably wouldn't make much difference at all, it just annoys me
that I cannot seem to breech the 200 mhz fsb mark.

Thanks,

Are you multiplier locked at 12.5 ? Maybe your locked multiplier
has you running at 2500MHz, which is a pretty decent overclock.
Does CPUZ say your multiplier setting is working (via the core
frequency value displayed) ?

What is the memory actually rated at ? Is this the 3200XL memory
with the TCCD rev F chips ? (I'm in the market for ram right now,
so any user experiences are important to me

Go to this page and click the link for your model number, as maybe
the rating is different depending on whether the memory is used on
a P4 or an Athlon system.

http://www.corsairmicro.com/corsair/xms.html

You might take a look over here, and see if other people have
complains about your memory. Maybe there will be some suggestions
about appropriate timings here:

http://www.houseofhelp.com/forums/forumdisplay.php?forumid=128

If you post again, include the exact model number of the Corsair
product.

I don't really understand what the deal is sometimes, with having
to derate memory when it is run in dual channel. The channels are
not supposed to know anything about one another, and the implication
is that either the Northbridge memory I/O drivers make too much
electrical noise inside the chip, or the Vdimm isn't holding up
(which isn't likely, as the frequency difference between working
and not working is so well defined).

HTH,
Paul

 

[peter]

With My Barton 2500 running on the same MOBO using 2x512Micron DDR 3200 chips I
have managed to achieve 200x11.5
with timings of 2.5/3/3/11and no increase in any voltages..........and stayed
there for quite awhile steady as a rock until I became a little concerned about
the heat
peter

 

[Don Burnette]

Are you multiplier locked at 12.5 ? Maybe your locked multiplier
has you running at 2500MHz, which is a pretty decent overclock.
Does CPUZ say your multiplier setting is working (via the core
frequency value displayed) ?

What is the memory actually rated at ? Is this the 3200XL memory
with the TCCD rev F chips ? (I'm in the market for ram right now,
so any user experiences are important to me

Go to this page and click the link for your model number, as maybe
the rating is different depending on whether the memory is used on
a P4 or an Athlon system.

http://www.corsairmicro.com/corsair/xms.html

You might take a look over here, and see if other people have
complains about your memory. Maybe there will be some suggestions
about appropriate timings here:

http://www.houseofhelp.com/forums/forumdisplay.php?forumid=128

If you post again, include the exact model number of the Corsair
product.

I don't really understand what the deal is sometimes, with having
to derate memory when it is run in dual channel. The channels are
not supposed to know anything about one another, and the implication
is that either the Northbridge memory I/O drivers make too much
electrical noise inside the chip, or the Vdimm isn't holding up
(which isn't likely, as the frequency difference between working
and not working is so well defined).

HTH,
Paul

HI Paul,

No, my processor is not locked, I got one just before they ran out of the
unlocked ones.
I will have to check the memory closer as to what it is rated at, all I
remember is it is the matched set of XMS Corsair Memory pc3200 - low latency
I believe, but I will double check.

Thanks,

 

[Don Burnette]

Not bad at all, I should think I should be able to get at least 200x11, if
not 11.5.
I'll try your ram timings and see if that helps.


Thanks,

 

[Don Burnette]

Well shoot.

No go, not even at 200x11.
I upped the vcore to 1.8, and dimm voltate to 2.8

I am afraid to try further.

Runs fine at 196 mhz fsb.

I have the mem running " with speed" , so it is running at the same speed.

 

[peter]

Do you have AGP locked at 66???
peter

Well shoot.

No go, not even at 200x11.
I upped the vcore to 1.8, and dimm voltate to 2.8

I am afraid to try further.

Runs fine at 196 mhz fsb.

I have the mem running " with speed" , so it is running at the same speed.

 

[Don Burnette]

Yes,

AGP is locked at 66.

Thanks,

 

[peter]

Sorry......................but try posting the same question here in the ASUS
forum.
http://www.nforcershq.com/forum/

peter

 

[Don Burnette]

Sorry......................but try posting the same question here in
the ASUS forum.
http://www.nforcershq.com/forum/

peter

Thanks Peter.

I did some reading of posts on the above forum, and , after identifying my
model of Corsair ram - TwinX 1024 3200LL, I decided to change the timings to
2-3-4-11, at 2.8v to start. My 3d Mark 03 actually increased about 50-60
points just from the timing change.

So far, running stable at 197 mhz fsb. Going to run Prime95 overnight, and
if it shows no errors in the morning, will gradually start upping the bus
speed - leaving the multiplier at 11. When it starts to get errors, I'll
drop it back a notch or two and see if I can bump the mulitplier to 11.5.

If not, then well, my system is already performing pretty dang good so I
can't complain too much .

 

[Don Burnette]

Thanks Peter.

I did some reading of posts on the above forum, and , after
identifying my model of Corsair ram - TwinX 1024 3200LL, I decided to
change the timings to 2-3-4-11, at 2.8v to start. My 3d Mark 03
actually increased about 50-60 points just from the timing change.

So far, running stable at 197 mhz fsb. Going to run Prime95
overnight, and if it shows no errors in the morning, will gradually
start upping the bus speed - leaving the multiplier at 11. When it
starts to get errors, I'll drop it back a notch or two and see if I
can bump the mulitplier to 11.5.
If not, then well, my system is already performing pretty dang good
so I can't complain too much .

Woohoo, finally have breached the 200 mhz fsb mark.
I had to increase the vcore to 1.825 to get it stable, but it is running
fine now at the 2-3-4-11 timings, and gained another 50 points in 3dmark03.
It ran Prime95 stable all night with no errors.

I am going to try bumping the fsb up a couple of mhz at a time until I reach
the plateau. I don't think I want to up the vcore much more.

So far, with my SLK 900, temps are still reasonable - 35 at idle, and 40
under load. The highest the temp has got is while running Prime95, and that
was 43c.

Thanks for the help folks,

 

[peter]

Glad you've achieved your goal............ooops....but that's not the end of it
is it?????
peter

 

[Don Burnette]

No, but I think I have stretched it about as far as I can.

I got it to run stable at 203 mhz fsb, and was able to get the ram timings
down to 2-3-3-11, which increased my 3dmark03 a little more.
I could probably up the vcore a little more and get it higher, but think I
probably will leave it be. At least I got it to run stable with a 200 mhz
fsb, which I did not think I would be able to do.

But who knows .


Thanks,

 

[A.R.Mills]

Hi,
Forgive me for jumping in at a tangent to original question but reading
the replies makes me wonder about the way my A7N8X Delux Rev2.0 behaves
whenever I try an incremental increase in speed.
There is no question of 'instability' as such, I just get a 'dead' PC.
nothing on the screen, shut down and restart - nothing.
The only way to get it to work again is battery out and clear the BIOS
and start from the basic default BIOS settings again.
I've updated the BIOS and even got a 'BIOS Saviour' thing in the hopes
that it would give me a 'second shot' when I'd 'killed' the first BIOS
but both BIOS's go out together.

Is this what has been described as 'instability' i.e. a dead PC?

Richard

 

[Doug Ramage]

Foe me "instability" means being able to boot into Windows, but the PC
freezes or BSODs later - both usually the result of my attempting too high
an FSB and/or clock or the timings are too tight.

 

[A.R.Mills]

Hi Doug,
I wish it worked that way for me. At least I'd be able to get back into
the BIOS to change the settings back down to something that would work
by either a 'reset' or even 'switching off' for a while.
If I get the settings wrong; as soon as I come out of the BIOS I've got
a 'dead' PC until it gets a 'kiss of life' by taking the battery out
etc.
There seems to be no intermediate stage, either the PC works OK or it is
dead.

Richard :-(

 

[Doug Ramage]

Richard, I should have added that some over-ambitious tweaks have also
rendered my pc dead, which required my clearing the CMOS.

My Asus PC-DL mobo reverts (usually) to minimum spec so I can get back into
the BIOS and undo my previous setting(s). This seems a much better option
that the A7N8X de luxe one.

 

[Don Burnette]

Not really Richard, at least in my experience.

When I raise mine to the point it gets unstable, my system will generally do
one of 2 things - reboot automatically when running a program, or crash
trying to load Windows and reboot.

 

[A.R.Mills]

You
Me :-(

Richard

Not really Richard, at least in my experience.

When I raise mine to the point it gets unstable, my system will generally do
one of 2 things - reboot automatically when running a program, or crash
trying to load Windows and reboot.