Strange Days

[funkdog]

Can anyone tell me why when I set my FSB to 145 and keep my multiplier at 7.5, at bootup it recognizes my CPU at 1233mhz and Sandra also reports it as 1233, when 145*7.5 = 1087mhz?? Just curious.

 

[peteb]

What was the chip originally? If it was an 850 I'd say you haven't unlocked it properly and it remains at 8.5 no matter what you 'think' you set it to.

Of course if it was a 750Mhz chip then there is something strange. Try Sandra 2001se if you are not using it or get a copy of wcpuid, which is usually considered accurate.

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[funkdog]

It's and Athlon C @ 1000mhz, Sandra reports my clock multiplier @ 7.5 with FSB @ 145 but says 1233mhz, but isn't 145 x 7.5 = 1087??

 

[peteb]

very strange - as you say. What mobo are you using. Until I got Sandra2001se (from Sandra2001) it didn't really have much of a clue about a lot of my system. Try that.

Are you setting speeds in BIOS or by jumper, or mixed?

Don't know - you got me there.

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[funkdog]

I'm running with an Iwill KK266, all bios changes. I'm back to stock 133 x 7.5 = 997, which is reporting correctly. All I'm doing is upping the FSB to 145 and it reports at 1233?? Strange, but even my bios says 1233?

 

[peteb]

I don't think the older SiSoft works with the KT133A chipsets - like I said, get SiSoft Sandra2001SE and try that. Spologies if you are already using it.

I have no explanation for the BIOS getting it wrong though. I take it there is no BIOS updates for your board available?

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[Tempus]

But you can't mix jumpermode and jumperless mode. Its all or none. The multiplyer dipswitches, FSB dipswitches, and some other odds and ends switches (such as JEN), have to all be set at a certain position for jumperless mode. If one of them is set to something other than that, they all act as if you are in jumper mode. Atleast that seems to be what my A7V133 manual is trying to convey...

- Tempus fugit donec vestrum relictus tripudium. Autem amor praeterea magis pretium.

 

[peteb]

>>Atleast that seems to be what my A7V133 manual is trying to convey...>>

Ah-ha - but this is the spirit of tweaking is it not - try different things that 'shouldn't' work, and find they do!

It doesn't work for FSB, (which it defaults to 100) but when your system comes up in 'safe mode' (bios, not windows) your system is set to what it thinks your multiplier is, 100FSB and Auto Voltage. A couple of memory settings seem to get changed too - but I don't really know what they did in the first place - so I ignore them now.

I have an unlocked (thanks AMD) 1.33 C Athlon. Should have a multiplier of 10. Dont recall std. voltage - 1.75 I think.

If I set my multiplier on the mobo to 11x, and the voltage to 1.85V, leaving bios all set to auto - the system comes up at 1100Mhz, with a core voltage of 1.89 - 1.9V (according to MBM.)

Therefore the jumpers are over-riding the cpu bridge settings (as unlocked) for voltage and multiplier. I don't know it the Althon is capable of setting the mobo at 133FSB so I think this is all perfectly normal.

Now, all I need to reset after a safe mode if my fsb, since I run 11x ult all the time anyway.

Still working on other things to get a little more out of it.

Even in Jumperless mode (jen 2-3) the jumpers can have an effect, it's just the the BIOS will let you over-write them.

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[funkdog]

Ok, I don't know what all that meant, but I do know that my Mobo has 1 jumper and that's for FSB control. Here's another question, I thought I unlocked the L1 bridges properly with a pencil when I could change my multiplier from the auto detect 7.5 x 133 or 997mhz, that's default for my 'C' athlon at 1ghz correct? Now I can only go as high as 8.5 with the multiplier, and I was getting 8.5 x 150fsb for 1275mhz, but it wouldn't let me go to 9 x 150, did I not connect all the L1 bridges but enough to enable an 8.5 multiplier??? Strange Days indeed.

 

[peteb]

When you say you cannot go to 9x multiplier, do you mean your bios won't let you set it, or your chip won't post at it?

You seem to be doing the right thing for performance - keep the FSB as high as is stable. You C atlon has a 7.5 default multiplier, yes. If your BIOS won't let you go over 8.5, then either it, or the mobo are suspect. Most bios (I use Asus boards) will let you set up to 12.5x, although I only use 11x)

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[funkdog]

Pete,

Right now I'm at 1.16 7.5x155. When I had closed my L1 bridges (I think). I was able to increase the multiplier in my Bios to as high as 12.5, but when windows booted it would show up as 8.5??? So no matter how high I set the multiplier, i.e. 9.0 or 9.5 x 155, It would boot up into windows as 8.5 x 155? So then I'm assuming that I didn't close the bridges correctly, and maybe I closed the correct one to let me get to 8.5 and not higher? I'm going to try and re-close them again today and see if I can get higher, at any rate I'm loving this 155fsb, even ran seti@home for 12hrs yesterday while I was away without a hitch.

Setup by the way is:
1ghz 'C' AXIA 0109 @ 155x7.5 = 1.16ghz
128MB Mushkin Rev 1.5 CAS 2 PC133 Sdram
Iwill KK266 mobo.

 

[Guest]

http://www16.big.or.jp/~bunnywk/

 

[peteb]

You've got to love the crazy Japanese. Assuming genuine, then this is an awesome overclock. As with all things, if they could get that into a case and run it for a week, then I'd be REALLY impressed - I might even get my credit card out.

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