P4 2.8C OCing Results??

Hi Troops,
I've got my 2.8C up to 3360MHz but it's not quite stable - reboots after
some intense flying in my sim.

Intel 2.8C, SL6WT, Zalman 7000A, ABIT IC7-Max3, ATI 9800 Pro w/Zalman VGA
cooler + fan, 1G OCZ Deluxe Gold PC4000. Lian-Li full tower case (PC-75)
with 6 fans (2-front intake, 2- lower rear exhaust, 2-upper rear exhaust),
PCP&C 510 P/S.
Settings:
NB Strap - By CPU
Dram Ratio - 1:1
AGP Ratio - Fixed
Fixed AGP/PCI Freq - 66/33
CPU Core V - 1.725v (Too high? Temp = 48° idle, 54-56° load)
DDR SDRAM V - 2.7v
AGP V - 1.55v
DRAM Timings - Manual 3,8,4,4
AGP - 8x

3DMark2003 = 5873 (good/bad/mediocre?)

I checked Overclockers.com and my CPU voltage is already higher than 99% of
the DB responders. Think I should raise my DDR V to 2.8? 3.4GHz is OK if
it's stable but I was hoping for 3.5 :-(

--
Tally Ho!
Ed Forsythe
Maryland, USA

"Ed Forsythe" wrote
Think I should raise my DDR V to 2.8? 3.4GHz is OK if
it's stable but I was hoping for 3.5 :-(


Hi Ed,
good to hear you got your rig together. I have been reading that you should
first increase vDimm *before* you increase vCore.
--
Wayne ][

OK Wayne, I'll back off to 2.8GHz then increase DDR SDRAM (vDiimm?) to 2.8.
Boot and fiddle then increase vCore to 1.7 shoot for 3.4 again and see what
happens. Still the troops on Overclockers.com are getting excellent results
with voltages (vCore) in the 1.6 range. Or maybe I'll just be satisfied
at 3.2GHz. Frankly I can't see any real difference between 3.4 and 3.2.
When I was using a sim at 3.4 MBM indicated my CPU temp was 61°C - that's a
bit too high for me. Thanks for the tip
--
Tally Ho!
Ed Forsythe
Maryland, USA


"Wayne Youngman" wrote in message
...

"Ed Forsythe" wrote
Think I should raise my DDR V to 2.8? 3.4GHz is OK if
it's stable but I was hoping for 3.5 :-(


Hi Ed,
good to hear you got your rig together. I have been reading that you
should
first increase vDimm *before* you increase vCore.
--
Wayne ][

Ed Forsythe wrote:

OK Wayne, I'll back off to 2.8GHz then increase DDR SDRAM (vDiimm?) to 2.8.
Boot and fiddle then increase vCore to 1.7 shoot for 3.4 again and see what
happens. Still the troops on Overclockers.com are getting excellent results
with voltages (vCore) in the 1.6 range. Or maybe I'll just be satisfied
at 3.2GHz. Frankly I can't see any real difference between 3.4 and 3.2.
When I was using a sim at 3.4 MBM indicated my CPU temp was 61°C - that's a
bit too high for me. Thanks for the tip


How'd it go, Ed?
Inquiring minds want to know... they also want to go FASTER!
-Pham

Hi Pham,
I'm still at 2.8 contemplating another try at 3.2 or 3.4. Maybe I'm just a
candy-a** but the high temps really bothered me. When I have time/guts for
another go I'll post
--
Tally Ho!
Ed Forsythe
Maryland, USA


"Pham" wrote in message
s.com...
Ed Forsythe wrote:

OK Wayne, I'll back off to 2.8GHz then increase DDR SDRAM (vDiimm?) to
2.8.
Boot and fiddle then increase vCore to 1.7 shoot for 3.4 again and see
what
happens. Still the troops on Overclockers.com are getting excellent
results
with voltages (vCore) in the 1.6 range. Or maybe I'll just be
satisfied
at 3.2GHz. Frankly I can't see any real difference between 3.4 and 3.2.
When I was using a sim at 3.4 MBM indicated my CPU temp was 61°C -
that's a
bit too high for me. Thanks for the tip


How'd it go, Ed?
Inquiring minds want to know... they also want to go FASTER!
-Pham

"Ed Forsythe" wrote in message
...
Hi Troops,
I've got my 2.8C up to 3360MHz but it's not quite stable - reboots after
some intense flying in my sim.

Intel 2.8C, SL6WT, Zalman 7000A, ABIT IC7-Max3, ATI 9800 Pro w/Zalman VGA
cooler + fan, 1G OCZ Deluxe Gold PC4000. Lian-Li full tower case (PC-75)
with 6 fans (2-front intake, 2- lower rear exhaust, 2-upper rear exhaust),
PCP&C 510 P/S.
Settings:
NB Strap - By CPU
Dram Ratio - 1:1
AGP Ratio - Fixed
Fixed AGP/PCI Freq - 66/33
CPU Core V - 1.725v (Too high? Temp = 48° idle, 54-56° load)
DDR SDRAM V - 2.7v
AGP V - 1.55v
DRAM Timings - Manual 3,8,4,4
AGP - 8x

3DMark2003 = 5873 (good/bad/mediocre?)

I checked Overclockers.com and my CPU voltage is already higher than 99%
of
the DB responders. Think I should raise my DDR V to 2.8? 3.4GHz is OK if
it's stable but I was hoping for 3.5 :-(

--
Tally Ho!
Ed Forsythe
Maryland, USA




Yes you vcore is to high and your AGPV is to low. Put both your mem and core
volts to specs. Check your idle and load temps and write them down. It's
important to do this before you o/c because the max three reads temps high.
Start at 2.8 and work your way up. Use prime and memtest as you slowly
increase your speed. Increase vcore by the smallest increments and only when
needed. Mem voltage should not be increased until your o/c becomes totally
obscene. Closely monitor your temps. If you get to a point where the small
vcore increase does not help then instead of moving the vcore even higher
try raising the AGP.At a certain pointt AGP voltage will cause problems.
Usually it happens higher than 3.3 but I personally run mine at 1.65.

Here are some bios settings you might try.
Set nb strap to 800 and disable the last two gat settings. Disable cache
bios and the other cache one next to it hmm? I forgot what it was called.
Don't use auto settings if you know what the setting should be. ie. divider
1:1 not auto.

P.S. Taking into account that the fan on your power supply is an exhaust fan
this mean that you have 5 exhaust fans and 2 intake fans. This is not good.
The total cfm of the two should be more closely matched.

Hi WD,
Thanks for the tips. I'll use them when I OC again. I'm not sure I agree
with your cooling adviice. I'm inclined to go for a negative pressure in
the case so that cool air is drawn in from every possible ingress point. A
positive case pressure would, IMHO, cause hot air to pile up inside the case
disrupting the laminar flow in the theoretical non-turbulent plenum. I
suppose a 1:1 system would be perfect theoretically but you'd need a sealed
case with no turbulence producing obstructions to insure that it would work
at max efficiency. Tell you what - next time I'm in the case I'll
disconnect the two top exhaust fans and check my temps Thanks again -
--
Tally Ho!
Ed Forsythe
Maryland, USA


"wasdiscovered" wrote in message
...

"Ed Forsythe" wrote in message
...
Hi Troops,
I've got my 2.8C up to 3360MHz but it's not quite stable - reboots after
some intense flying in my sim.

Intel 2.8C, SL6WT, Zalman 7000A, ABIT IC7-Max3, ATI 9800 Pro w/Zalman
VGA
cooler + fan, 1G OCZ Deluxe Gold PC4000. Lian-Li full tower case (PC-75)
with 6 fans (2-front intake, 2- lower rear exhaust, 2-upper rear
exhaust),
PCP&C 510 P/S.
Settings:
NB Strap - By CPU
Dram Ratio - 1:1
AGP Ratio - Fixed
Fixed AGP/PCI Freq - 66/33
CPU Core V - 1.725v (Too high? Temp = 48° idle, 54-56° load)
DDR SDRAM V - 2.7v
AGP V - 1.55v
DRAM Timings - Manual 3,8,4,4
AGP - 8x

3DMark2003 = 5873 (good/bad/mediocre?)

I checked Overclockers.com and my CPU voltage is already higher than 99%
of
the DB responders. Think I should raise my DDR V to 2.8? 3.4GHz is OK
if
it's stable but I was hoping for 3.5 :-(

--
Tally Ho!
Ed Forsythe
Maryland, USA




Yes you vcore is to high and your AGPV is to low. Put both your mem and
core
volts to specs. Check your idle and load temps and write them down. It's
important to do this before you o/c because the max three reads temps
high.
Start at 2.8 and work your way up. Use prime and memtest as you slowly
increase your speed. Increase vcore by the smallest increments and only
when
needed. Mem voltage should not be increased until your o/c becomes totally
obscene. Closely monitor your temps. If you get to a point where the small
vcore increase does not help then instead of moving the vcore even higher
try raising the AGP.At a certain pointt AGP voltage will cause problems.
Usually it happens higher than 3.3 but I personally run mine at 1.65.

Here are some bios settings you might try.
Set nb strap to 800 and disable the last two gat settings. Disable cache
bios and the other cache one next to it hmm? I forgot what it was called.
Don't use auto settings if you know what the setting should be. ie.
divider
1:1 not auto.

P.S. Taking into account that the fan on your power supply is an exhaust
fan
this mean that you have 5 exhaust fans and 2 intake fans. This is not
good.
The total cfm of the two should be more closely matched.

The laws of physics can only be applied to a certain point. You must
take all the wire & cables in the system into consideration plus
interference from other cards ie video, nic etc.. Your lower fans
will suck out air pushed in from the front fans leaving the upper fans
sucking vacuum (path of least resistance) Your upper fans will attempt
(not necc do) suck in air from the other orifices/or cracks in the
case (couldn't resist that one;-). Heat rises it does not drop to the
bottom of the case.

Is your CPU in line with the lower fans or is it higher? If higher
the incoming air (front fans) will not be available to cool it,
passing by at a lower level.

Solution disconnect at least 1 lower fan to direct air flow past the
CPU or open a decent hole in the upper front of the case so that
negative pressure has something to work with other than vacuum.

I do not find your load temps that high, Mine is 48C. Idle temps are
27C however.


Locust



On Tue, 11 May 2004 17:40:47 -0400, "Ed Forsythe"
wrote:

Hi WD,
Thanks for the tips. I'll use them when I OC again. I'm not sure I agree
with your cooling adviice. I'm inclined to go for a negative pressure in
the case so that cool air is drawn in from every possible ingress point. A
positive case pressure would, IMHO, cause hot air to pile up inside the case
disrupting the laminar flow in the theoretical non-turbulent plenum. I
suppose a 1:1 system would be perfect theoretically but you'd need a sealed
case with no turbulence producing obstructions to insure that it would work
at max efficiency. Tell you what - next time I'm in the case I'll
disconnect the two top exhaust fans and check my temps Thanks again -
--
Tally Ho!
Ed Forsythe
Maryland, USA








Yes you vcore is to high and your AGPV is to low. Put both your mem and
core
volts to specs. Check your idle and load temps and write them down. It's
important to do this before you o/c because the max three reads temps
high.
Start at 2.8 and work your way up. Use prime and memtest as you slowly
increase your speed. Increase vcore by the smallest increments and only
when
needed. Mem voltage should not be increased until your o/c becomes totally
obscene. Closely monitor your temps. If you get to a point where the small
vcore increase does not help then instead of moving the vcore even higher
try raising the AGP.At a certain pointt AGP voltage will cause problems.
Usually it happens higher than 3.3 but I personally run mine at 1.65.

Here are some bios settings you might try.
Set nb strap to 800 and disable the last two gat settings. Disable cache
bios and the other cache one next to it hmm? I forgot what it was called.
Don't use auto settings if you know what the setting should be. ie.
divider
1:1 not auto.

P.S. Taking into account that the fan on your power supply is an exhaust
fan
this mean that you have 5 exhaust fans and 2 intake fans. This is not
good.
The total cfm of the two should be more closely matched.

"Ed Forsythe" wrote in message
...
Hi WD,
Thanks for the tips. I'll use them when I OC again. I'm not sure I agree
with your cooling adviice. I'm inclined to go for a negative pressure in
the case so that cool air is drawn in from every possible ingress point. A
positive case pressure would, IMHO, cause hot air to pile up inside the
case
disrupting the laminar flow in the theoretical non-turbulent plenum. I
suppose a 1:1 system would be perfect theoretically but you'd need a
sealed
case with no turbulence producing obstructions to insure that it would
work
at max efficiency. Tell you what - next time I'm in the case I'll
disconnect the two top exhaust fans and check my temps Thanks again -
--
Tally Ho!
Ed Forsythe
Maryland, USA


"wasdiscovered" wrote in message
...

"Ed Forsythe" wrote in message
...
Hi Troops,
I've got my 2.8C up to 3360MHz but it's not quite stable - reboots
after
some intense flying in my sim.

Intel 2.8C, SL6WT, Zalman 7000A, ABIT IC7-Max3, ATI 9800 Pro w/Zalman
VGA
cooler + fan, 1G OCZ Deluxe Gold PC4000. Lian-Li full tower case
(PC-75)
with 6 fans (2-front intake, 2- lower rear exhaust, 2-upper rear
exhaust),
PCP&C 510 P/S.
Settings:
NB Strap - By CPU
Dram Ratio - 1:1
AGP Ratio - Fixed
Fixed AGP/PCI Freq - 66/33
CPU Core V - 1.725v (Too high? Temp = 48° idle, 54-56° load)
DDR SDRAM V - 2.7v
AGP V - 1.55v
DRAM Timings - Manual 3,8,4,4
AGP - 8x

3DMark2003 = 5873 (good/bad/mediocre?)

I checked Overclockers.com and my CPU voltage is already higher than
99%
of
the DB responders. Think I should raise my DDR V to 2.8? 3.4GHz is
OK
if
it's stable but I was hoping for 3.5 :-(

--
Tally Ho!
Ed Forsythe
Maryland, USA




Yes you vcore is to high and your AGPV is to low. Put both your mem and
core
volts to specs. Check your idle and load temps and write them down. It's
important to do this before you o/c because the max three reads temps
high.
Start at 2.8 and work your way up. Use prime and memtest as you slowly
increase your speed. Increase vcore by the smallest increments and only
when
needed. Mem voltage should not be increased until your o/c becomes
totally
obscene. Closely monitor your temps. If you get to a point where the
small
vcore increase does not help then instead of moving the vcore even
higher
try raising the AGP.At a certain pointt AGP voltage will cause problems.
Usually it happens higher than 3.3 but I personally run mine at 1.65.

Here are some bios settings you might try.
Set nb strap to 800 and disable the last two gat settings. Disable cache
bios and the other cache one next to it hmm? I forgot what it was
called.
Don't use auto settings if you know what the setting should be. ie.
divider
1:1 not auto.

P.S. Taking into account that the fan on your power supply is an exhaust
fan
this mean that you have 5 exhaust fans and 2 intake fans. This is not
good.
The total cfm of the two should be more closely matched.




Operating a case with significant negative air pressure means it will draw
air (and dust !!) inefficiently through every slit and pinhole in the
case/case cover. IMO that is not a positive situation. I prefer balanced or
slightly positive air pressure, to keep things inside clean (no dust
accumulation). All air should be drawned in via filters.

My advice to you situation is try to modify the exhaust fan connection from
12V to 7V (you can do that with a modded 4pin molex or cut & solder
connectors. this will a) still utilize your existing hardware, b) reduce
noise levels, c) reduce air draw to more balanced level, d) reduce power
draw (and heat) from PSU.
Start with lower exhaust fans - they draw relatively cool air from front
(lower) intake fans out of the case before it removes much heat. let the air
flow across your system upwards and backwards, to the PSU+upper exhaust
fans.

Optionaly disable one or both lower exhaust fans (to reduce noise even more)
or put them both at 5V for extremely low RPM, noise and power draw... and
put your 2 upper exhaust fans at 17V (or one at 7V, one at 12V to be on the
safe side) - if you are comfortable with this kind of modification (crossing
the wires of the 5v+, 0, 0, 12v+ molex connectors).

Internal air flow pattern is invariant to external differences. Its
turbulency will only be governed by geometry, path, and the gradient of
intake/exhaust ports, whether it is higher or lower than outside pressure is
irrelevant.

You're not being a candy-a, Ed. If I had an idle temp of 48C I'd be a
little concerned too. Have you got a good CPU heatsink/fan setup?

Also, what par of Maryland you from?

Todd
Ellicott City, MD

"Ed Forsythe" wrote in message
...
Hi Pham,
I'm still at 2.8 contemplating another try at 3.2 or 3.4. Maybe I'm just
a
candy-a** but the high temps really bothered me. When I have time/guts
for
another go I'll post
--
Tally Ho!
Ed Forsythe
Maryland, USA


"Pham" wrote in message
s.com...
Ed Forsythe wrote:

OK Wayne, I'll back off to 2.8GHz then increase DDR SDRAM (vDiimm?) to
2.8.
Boot and fiddle then increase vCore to 1.7 shoot for 3.4 again and see
what
happens. Still the troops on Overclockers.com are getting excellent
results
with voltages (vCore) in the 1.6 range. Or maybe I'll just be
satisfied
at 3.2GHz. Frankly I can't see any real difference between 3.4 and
3.2.
When I was using a sim at 3.4 MBM indicated my CPU temp was 61°C -
that's a
bit too high for me. Thanks for the tip


How'd it go, Ed?
Inquiring minds want to know... they also want to go FASTER!
-Pham