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How to change P5WDH multi?

451 Views 12 Replies 4 Participants Last post by  Nasgul, 
killnine
hey guys, dumb question. I have been overclocking my processor thought a little bit of a FSB boost, but left the multi alone.

my multiplier is at 20x right now, but I want to drop it to 14x to let this new ram I got spread its wings a little. However, I can't figure out how to.

I did it before by just selecting the "Modify ratio support" on the bios (1901, btw). But now, even though I have that selected, my multiplier remains at 20. Any thoughts on how to drop it?

thanks
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Nasgul
I belive!


That you either update to the latest BIOS which I'm not 100% sure if the Modify Ratio Support feature is available.

Or, that there was never an available option for that chipset (or motherboard) in particular.
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killnine
I know that I had my multiplier change once before. But I cant remember if it was on my 805 or my 560. However, the option to "modify ratio support" is available and set to "enable" but there are no other options and the ratio doesn't change.

Googling the issue doesn't help much, but googling Pentium 805 multiplier yields the fact that its unlockable downward to 14x.

What the heck....
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grunion
I recently had a 630 and an 830 in my P5B, I couldn't change the multi with either.
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killnine
Son of a gun.

Well, this is SO confusing. I am absolutely positive that I changed the multi on one of my two processors. However, I dont know why I would be able to do it on a 560 and not an 805. The 560 was a D0 revision.

Hrm, this is sooo bizarre.
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grunion
Quote:


Originally Posted by killnine
View Post

Son of a gun.

Well, this is SO confusing. I am absolutely positive that I changed the multi on one of my two processors. However, I dont know why I would be able to do it on a 560 and not an 805. The 560 was a D0 revision.

Hrm, this is sooo bizarre.

Tried CMOS clear yet? IDK if that would help though, didn't me.
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Nasgul
It was the 560, just like the 660: http://valid.x86-secret.com/show_oc.php?id=85130

The 805 can't because it's not one of those CPUs that support that feature but the 3.60ghz and 3.80ghz will certainly do that.
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grunion
Quote:


Originally Posted by Nasgul
View Post

It was the 560, just like the 660: http://valid.x86-secret.com/show_oc.php?id=85130

The 805 can't because it's not one of those CPUs that support that feature but the 3.60ghz and 3.80ghz will certainly do that.


Wonder why the 830 I had couldn't?
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Nasgul
The only Dual Core capable of modifying the ratio was the Pentium D 960 but from what I can recall, when modifying the ratio to x12, the CPUs performance suffer badly and was not stable, so it was pointless.

And to this date to run a low multi and a high fsb speed, it's not worth it. I've used 450x7 and now 350x7 and see no difference in performance, so I don't bother with lowering the multi. For Intel CPUs, it's all about the clock speed.
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killnine
Well the only reason I wanted to lower the multi is because I thought pumping up the fsb relieved the stress on the chip and moved it to the northbridge a bit. But I am probably just making that up.
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R
Hi killnine,

Ya the modify ratio support was added in the P5WDH. Mine didn't used to be capable, through a couple different bios's. Now I have bios 2004, and dropping multi is can-do
. Not sure which version they added it exactly, but I think it would work before 2004 bios as well, pretty sure I could also do it before that. Should be in the CPU menu where all the temp throttling etc is, if not, you need a flash
.

Quote:

Originally Posted by killnine View Post
Well the only reason I wanted to lower the multi is because I thought pumping up the fsb relieved the stress on the chip and moved it to the northbridge a bit. But I am probably just making that up.
I don't think that's the case regarding the cpu. Moving up fsb can increase performance some, and ya you're making the mobo/NB run harder you're right. But I've even seen where a cpu needs more vcore to sustain same clock as before, after dropping multi and pumping fsb up.
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killnine
yeah, Roscoe, its there, but there is no option to change the multi. All it does is have an option to enable such a feature, but no other options (like selecting a specific multi) appear.
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Nasgul
RoscoeMcGurk
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