OC Advice Needed

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

Peter Harrington wrote:
> I recently moved a DFI NF2 Ultra Infinity board with 2X256 MB Geil Golden
> Dragon RAM PC 3400 (6, 3, 3), 500 W generic PSU, and a XP 2500+ to my
> home. Backing off on the RAM timings does not appear to help. I have the
> RAM at
> 2.9 V and VDD at 1.7 V.
>
> In my office which is air-conditioned, I could over-clock the system to
> 11x209 @ 1.8 V. I used a stock HSF when I moved it home, where the
> ambient tenperatures are much higher (42 C case temps). The system was
> stable.
>
> At my house, I would settle for 11x200.
>
> When I run Prime 95 at FSB speeds above 180 MHz, I almost instantly get
> round-off errors even at fairly high voltages but low CPU temps because
> the system does not have much time to heat up. The errors occur at about
> 60 C, under 1 minute.
>
> 1. Will high temperatures cause these types of errors (i.e., FPU)?

High, yes. But probably more like 100°C. Be sure to measure the CPU diode
temp, not just the socket temp.

> 2. Will replacing the HSF help?

Probably not if your ambient temps in the case is 42°C.

> 3. Any other low cost recomendations for cooling in rooms with high
> ambient temperatures?

If your room is at 42°C or anywhere near that then something is wrong. I
would suggest that you look at your case cooling.

Have you blocked the inlet by sitting it on carpet? Are all case fans (and
PSU fans) working? Describe your case cooling: position and direction of
fans etc.

Ben
--
A7N8X FAQ: www.ben.pope.name/a7n8x_faq.html
Questions by email will likely be ignored, please use the newsgroups.
I'm not just a number. To many, I'm known as a String...

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

Removing the front cover, I can get my case temps down to 36 C. I am
planning on taking a drill to it and adding a few new holes. I am sure it
will look a bit unsightly, but it should do the job. It turns out that
there are a series of pinholes in the front of the case strategically placed
BELOW the fan.

The system runs ok with Prime 95 on the 8K torture test which leads me to
believe the problem must be the FSB or RAM. It runs fairly well on a VCore
of 1.75 V. I have the RAM timings set to the advertised 6 3 3 2.5 CAS. I
am not sure where one sets the 1T spec in the BIOS.

The FSB is 200 MHz, AGP 66 MHz, and RAM 1:1.

I have upped the FSB to 1.8 V, but I still have the problem of failing on
the first 1024 K test.

Any thoughts would be appreciated on things to try.

TIA,

Pete

"Peter Harrington" <pharring@columbus.rr.com> wrote in message
news:2MNwc.42904$DG4.35774@fe2.columbus.rr.com...
> Thanks, Ben
>
> Under load the case temp is 45 C. I am using the default settings of MBM
> 5.3 for the DFI NF2 UI.
>
> I have a 40 mm rear exhaust fan and a 40 mm intake fan in the front but
now
> that I look at the case there are no holes for the intake air flow. How
> could I have missed somthing so obvious. I may have to take a drill to it
> and open it up a bit.
>
> The HD seem to get very hot too, so I may to find a fan for those.
>
> Not sure how its going to look.
>
> Cheers,
>
> Pete
>
> "Ben Pope" <spam@hotmail.com> wrote in message
> news:2ihlv5Fmsp2eU1@uni-berlin.de...
> > Peter Harrington wrote:
> > > I recently moved a DFI NF2 Ultra Infinity board with 2X256 MB Geil
> Golden
> > > Dragon RAM PC 3400 (6, 3, 3), 500 W generic PSU, and a XP 2500+ to my
> > > home. Backing off on the RAM timings does not appear to help. I have
> the
> > > RAM at
> > > 2.9 V and VDD at 1.7 V.
> > >
> > > In my office which is air-conditioned, I could over-clock the system
to
> > > 11x209 @ 1.8 V. I used a stock HSF when I moved it home, where the
> > > ambient tenperatures are much higher (42 C case temps). The system
was
> > > stable.
> > >
> > > At my house, I would settle for 11x200.
> > >
> > > When I run Prime 95 at FSB speeds above 180 MHz, I almost instantly
get
> > > round-off errors even at fairly high voltages but low CPU temps
because
> > > the system does not have much time to heat up. The errors occur at
> about
> > > 60 C, under 1 minute.
> > >
> > > 1. Will high temperatures cause these types of errors (i.e., FPU)?
> >
> > High, yes. But probably more like 100°C. Be sure to measure the CPU
> diode
> > temp, not just the socket temp.
> >
> > > 2. Will replacing the HSF help?
> >
> > Probably not if your ambient temps in the case is 42°C.
> >
> > > 3. Any other low cost recomendations for cooling in rooms with high
> > > ambient temperatures?
> >
> > If your room is at 42°C or anywhere near that then something is wrong.
I
> > would suggest that you look at your case cooling.
> >
> > Have you blocked the inlet by sitting it on carpet? Are all case fans
> (and
> > PSU fans) working? Describe your case cooling: position and direction
of
> > fans etc.
> >
> > Ben
> > --
> > A7N8X FAQ: www.ben.pope.name/a7n8x_faq.html
> > Questions by email will likely be ignored, please use the newsgroups.
> > I'm not just a number. To many, I'm known as a String...
> >
> >
>
>