basic queries about overclocking

I am running a Duron Applebred 1800 in a Via 266 mobo by Syntax
with 768 KB of 133 SD-RAM. CPU temp under load = 44 degrees C.
Phoenix BIOS.

My crappy mobo doesn't permit very many setting. (EG can't set cpu
multiplier.)

---------

Can I check with you guys about some basic stuff:

If I slightly increase the cpu voltage from the 1.52 V at present
(nominal voltage for my Duron 1800 is 1.50 V) then will that help
increase cpu stabilty? I can increase by only 25 mV, 50 mV or 75
mV. I figured that 75 mV feels safe - QUESTION ONE: is this
right?

In the past with a slower processor, I increased the "CPU Host
Clock" (which sounds to me like the FSB) from a starting value of
100 to 104 (an extra 4 %) or a slightly unstable 106. I think
memory was the limiting factor for stability this time.

I have currently got all the memory settings at what I believe is
their most aggressive:
SDRAM cycle length = 2,
Trp = 2T,
Tras = 5T,
Trcd = 3T.

QUESTION TWO: Should I be able to increase the FSB to about the
same value as before because, presumably, the faster new processor
(Duron 1800 versus old Duro 700) should have no effect on the FSB
setting?

QUESTION THREE: Would I be able to increase the FSB bus more if I
made the above memory settings less aggressive? This would seem
to be the only way to increase the CPU speed.

Finally, is "Vcore 2" (reported by Motherboard Monitor 5)
essentially only used by the CPU for I/O operations?

Forget about overclocking with what you have... also, reset the memory to
default settings!

--
All problems have a simple solution! The more complex the solution, the
more ludicrous the analogy!

On Sun, 24 Jul 2005 17:26:42 +0100, Jon D wrote:

Doesn't matter. You can always use the pinmod to change multipliers on any
board. problem is that the 1800 you have is probably multiplier locked
anyway.

You can raise it to 1.65v and not pass the default voltage of the 3200+.
And if needed, you can go up to 1.85v, but I'd stay under 1.8.

Could have been, but hard for me to say.

When you raise the FSB, it affects all other buses on this board, so the
ram bus will increase as will the AGP and PCI bus speeds.

That's correct. With luck and decent ram, you should be able to get the
FSB up to 145-150MHz before the PCI/AGP bus overclock fails. And raise
vcore to 1.65v first. Tweak it down when done if you want to, If you can
reach 150, that's a little over 2000MHz. That isn't going to be a problem
for the cpu. I've run my Duron 1600 (Tbred B core) at 12x200.


Depends on what sensor vcore2 is reading as to what it's reporting. It
could be pointing at a thermistor on the MB, a chipset sensor, or
whatever, maybe nothing, or the same as vcore1. You'll have to check the
setup to see.

--
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Need good help? Provide all system info with question.
My server http://wesnewell.no-ip.com/cpu.php
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On Sun 24 Jul 2005 21:10:41, Wes Newell wrote:











Thanks for the info Wes, you make some points I find useful. Like
Kony (who has posted soon after you) you refer to specific values
which is something I find particularly useful is your posting.

The one thing I am unclear about is where you say this:


What is the connection between my Duron (= slugged Thoroughbred) and
a 3200+ Athlon? Does the basic T'bred design now go up as far as
3200+? Last time I looked it was something like 2400+.

On Sun 24 Jul 2005 21:10:41, Wes Newell wrote:











Thanks for the info Wes, you make some points I find useful. Like
Kony (who has posted soon after you) you refer to specific values
which is something I find particularly useful is your posting.

The one thing I am unclear about is where you say this:


What is the connection between my Duron (= slugged Thoroughbred) and
a 3200+ Athlon? Does the basic T'bred design now go up as far as
3200+? Last time I looked it was something like 2400+.