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  #1 (permalink)  
Old 07-24-2005, 09:41 PM
Sleepy
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Default Re: basic queries about overclocking


"Jon D" <jon_d@nomail.com> wrote in message
news:969DB17618C3771E5D@66.250.146.159...
>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?


This little program http://www.cpuid.org/cpuz.php will give you a good idea
of what settings your
RAM can handle and you would probably have to ditch that RAM and go for
PC2700 to overclock
the FSB which is your only option on that board. And it would have to be
decent PC2700 as there isnt
much scope in the RAM settings. I have the same board and 2 differant sticks
of PC2700 - one stick will
overclock up to 150mhz which means Im o/c the FSB and everything - the other
stick wont o/c without
a TRAS setting of 7 which this board wont do. So choose your RAM carefully -
up the voltage on the CPU core
and make sure you have good cooling. Is it worth it ?



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  #2 (permalink)  
Old 07-25-2005, 07:23 AM
Sleepy
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Posts: n/a
Default Re: basic queries about overclocking - SDRAM to DDR?


"Jon D" <jon_d@nomail.com> wrote in message
news:969E109E36ADF71E5D@66.250.146.159...
>> "Jon D" <jon_d@nomail.com> wrote in message
>> news:969DB17618C3771E5D@66.250.146.159...
>>>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?

>
>
> On Sun 24 Jul 2005 22:41:19, Sleepy wrote:
> <news:3WTEe.6712$dN6.317@fe1.news.blueyonder.co.uk >
>>
>> This little program http://www.cpuid.org/cpuz.php will give you
>> a good idea of what settings your
>> RAM can handle and

>
> Nice program. Thank you for the reference.
>
>
>> you would probably have to ditch that RAM and
>> go for PC2700 to overclock
>> the FSB which is your only option on that board. And it would
>> have to be decent PC2700 as there isnt
>> much scope in the RAM settings. I have the same board

>
> Sleepy, as you have the same mobo then you know that the Syntax
> mobo will take SD-RAM or DDR.
>
> If I just replaced my 768 MB of 133MHz SD-RAM with the same amount
> of 333 MHz PC2700 memory, then do you think I would see a 10% (or
> better) improvement?
>

yes - you dont get a huge increase but that 10% is worth it.

> As you say, there is not much scope for overclocking so maybe I
> would just use DDR memory and use reasonable aggressive settings.
>
> What do you reckon?

If you overclock the FSB and you can do it easily in the Bios then
you get everything to run a little faster. Try 140mhz and your 1800 CPU
becomes
a 2000 and your memorys faster and the Hard Drive interface too. Bump the
CPU voltage
up a bit to keep it stable say 1.65v but as you increase voltage you will
increase heat too
so use Motherboard Monitor to keep an eye on temps. The 40-50 c range is
good and up
to 58 c on a hot summer day is what I get.

> You seem to be in the UK. The price of generic DDR memory (as I
> am not overlcoking) with CL=2.5 that might be ok at CL=2 is approx
> 40 + p&p. Do I get at least a 10% improvement for putting that
> memory in?


personally I went to 1gb from 512mb - running XP Pro and HL2 requires
that much RAM to run smoothly. Ive never worried too much about CAS
settings etc .. its the quantity of RAM that counts.

>> and 2
>> differant sticks of PC2700 - one stick will
>> overclock up to 150mhz which means Im o/c the FSB and everything
>> - the other stick wont o/c without
>> a TRAS setting of 7 which this board wont do. So choose your RAM
>> carefully - up the voltage on the CPU core
>> and make sure you have good cooling. Is it worth it ?

>




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  #3 (permalink)  
Old 07-25-2005, 02:50 PM
kony
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Posts: n/a
Default Re: basic queries about overclocking - SDRAM to DDR?

On Mon, 25 Jul 2005 07:23:47 GMT, "Sleepy"
<bpespleyremovetheobvious@blueyonder.co.uk> wrote:


>> If I just replaced my 768 MB of 133MHz SD-RAM with the same amount
>> of 333 MHz PC2700 memory, then do you think I would see a 10% (or
>> better) improvement?
>>

>yes - you dont get a huge increase but that 10% is worth it.


Buying 768MB of memory is worth 10%?
Hardly.
Same $ would better be spent on a board that raises
multiplier or a different CPU, if not the whole set of
parts.




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