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- newbie overclocked p4 2.8b on asus p4pe
- C.J. Dwight
September 9, 2005, 4:45 am
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I have overclocked my northwood 2.8Ghz to 3401.1Mhz. I didn't change voltages,
just fsb. I have
pc2700 (333mhz) memory so I figure it will be optimum at fsb 166 because it will
be same speed as
memory. But I can only get to 162mhz, anything higher and windows won't boot.
I guess I need to up
my voltages, right? I need some guidance here, how high should I go, what temp
should I not go
I am disappointed, I benchmarked hl2 using a tool and I get, drum roll please. .
. . 2 fps more 52
instead of 50. I have a ati x800 xt pe so I figure my cpu is the bottleneck. I
really want to
benchmark battlefield2, especially using bots, I think this is the game that
will benefit most from
the higher clock. Anyone know how to do that?
Also, when I am overclocked, asus probe is acting funky, it won't detect fan
rpms, and sometimes the
voltages spike crazy, like down to 6v from 12, I am certain that has to be asus
probe though because
the voltage spikes only occured when I just started the program. I have a
enermax 420watt psu.
Another question is the precise clock speed is different in bios, in my computer
properties, and in
cpu-z. So I don't really know which is the correct one.
Re: newbie overclocked p4 2.8b on asus p4pe
Ok, I needed to put the vcore to 1.6v up from 1.525v, and it runs at 166fsb. it
seems to be stable,
load temp is 60, idle is 43-44. I plan on leaving it like this, this is not
going to far, I am not
destroying my cpu right? Also, if I invest in one of those high end hsu, how
much do you guys think
it will bring down the temperature? I see plenty of review of these heat sinks
but, they never tell
me what the original temperature is with stock hsus. I also don't have any of
Doom 3 and battlefield 2 load 10 seconds faster. Framerates have improved like
maybe 5fps in
counter-strike source with lots of bots on screen.
Re: newbie overclocked p4 2.8b on asus p4pe
'C.J. Dwight' wrote, in part:
| Ok, I needed to put the vcore to 1.6v up from 1.525v, and it runs at
166fsb. it seems to be stable,
| load temp is 60, idle is 43-44. I plan on leaving it like this, this is
not going to far, I am not
| destroying my cpu right? Also, if I invest in one of those high end hsu,
how much do you guys think
| it will bring down the temperature? I see plenty of review of these heat
sinks but, they never tell
| me what the original temperature is with stock hsus. I also don't have
any of those special
| thermoconducting pastes.
Go back to the stock CPU core voltage, then raise it by the smallest
increment possible, then test for stable operation. Use the lowest possible
CPU voltage that gives stable operation under heavy load. This will result
in lower heat production.
IN NO CASE raise the CPU voltage by more than 10%; there are no garuntees
that even a 10% higher than specified CPU voltage will not instantly destroy
your particular CPU. An Intel CPU suffer a heat death from raising the CPU
speed, but a too high CPU voltage can instantly destroy the CPU. Exactly
what voltage will be discovered to late.
As for a greater overclock, I assume you have a Pentium 2.8 GHz 533 MHz FSB
'Northwood', annd now have it operating in a stable fashion at 21 X 166.67
MHz = 3500 MHz.
Should you invest in a better heatsink? Depends on what you have and what
you want. First, try higher speeds with what you have now. When you reach
the point that the system fails to boot with the memory set to a 1:1: ratio,
try changing that to let the memory run at a lowe speed than the CPU clock.
If that lets you boot, then you know that the memory willl hold you back, no
matter what you get for cooling the CPU.
When you overclock, you are trading operating temperature and timing safety
margins for speed. There are no garuntees than cooling your particular CPU
will allow higher stable speeds. You might spend hundres of dollars on an
exotic cooling system, only to find that the money would have been better
spend on new CPU / memory / motherboard / display adapterto get better
Even just a $100 US spent on a new CPU cooling solution will likely give an
unnoticable overall performance increase; you might get lucky and get
another few hundred MHz, but will that give a noticable improvement for your
As for a better thermal compound, even butter does a fairly decent job; most
any real thermal compound will do. You are getting a decent overclock now,
and the hassel and expense of changing thermal compounds is more than the 1
or 2 degree C temperature reduction you will see. Lapping the heatsink
surface and the CPU heat spreader surface completely smooth and flat, then
using the thinnest possible coation of any thermal compound will give
perhaps a 4 or 5 degree C temperature reduction, buth then it may be that
you still not get a higher overclock.
Now if you want to fool around and experiment, and are willing to spend the
time and money for possibly no gain, then there are lots of thing you can
try. But if you go this route, I strongly recommend that you have at least
two systems, and that you should be ready to have the overclocking
experimental system out of service a good part of the time.
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