Athlon XP 1900+ showing as 1.2ghz! :/

[amd_builder]

I recently bought a Soltek SL-75DRV2 motherboard, Corsair pc2400 CAS2 512mb ddr ram, Athlon XP 1900+ processor and there is a major problem.

I built the whole system and got it running and to my horror the processor showed as an Athlon XP 1200mhz as it was booting. I have an Athlon XP 1900+ processor (1.6ghz) that I bought from Googlegear.com. I have updated my Bios to the latest version to support an Athlon XP with no luck.

Does anyone know what could be causing the problem here or if Googlegear.com is trying to screw me over and if they are notorious for doing that?

Thanks!

<P ID="edit"><FONT SIZE=-1><EM>Edited by amd_builder on 03/03/02 01:01 AM.</EM></FONT></P>

 

[Crashman]

Duh, you forgot to set your bus speed to 133, it's currently at 100. Think about it, 12x100=1200, 12x133=1600.

Heh, some amd_builder.

 

[CMRvet]

is your FSB running at 133 MHz?

 

[CMRvet]

who did the first post?

 

[OldBear]

Obviously the Gigolo.

<font color=blue><b>You get what you pay for...all advice here is free.</b></font color=blue>

 

[amd_builder]

Shouldn't it be defaulted at 133mhz? It seems like I would just be overclocking a 1.2ghz if I set it from 100 to 133mhz? I'm thinking that Googlegear ripped me off and sent me a 1.2ghz instead of a 1.6ghz though i'm a newbie so maybe not. Should I have to set it to 133mhz manually?

 

[amd_builder]

Also, it says the max speed I can set it to is 132, does this seem normal? heh

 

[CMRvet]

Motherboards normally come with 100 Mhz at deafult, however athlon XP WORKS with 133 MHz FSB (not overclocked). You must set the FSB at 133 MHz manually.

 

[amd_builder]

It wont boot with higher than 116mhz /sigh I also tried raising the voltage to 1.825 and that didn't work so I just set it back.

 

[girish]

yes, your processor is running at 100 MHz FSB, and that is by default on all motherboards.

Why? Try putting a Athlon 1000/100 on a board with 133 MHz FSB set by default, it wont even boot since it is attempting to run at 1333 MHz!

It would be cool if the FSB is autodeteceted, as in Intel chips where there are two pins that tell the motherboard about the FSB, but AMD chips can be multiplier unlocked and there is a risk of running the CPU too fast with 133 MHz FSB, hence it makes sense to set the FSB to 100 MHz by default! Those who really want it at 133, should set it so!

girish

<font color=red>Nothing is fool-proof. Fools are Ingenious!</font color=red>

 

[CMRvet]

running at 116 MHz you are be pushing the PCI devices maybe, but at 133 MHz PCI dividers will change and the PCI must be working at default 33 MHz.
Anyway AMD XP is designed to work with 133 MHz FSB and your motherboard too. (that's not overclocking)

 

[ath0mps0]

Shouldn't it be defaulted at 133mhz?

Sigh, no, most motherboards unfortunately still default to 100 - that way if you have a 100MHz FSB processor it will actually boot. I agree that the motherboard manus need to do something about this - read the FSB from the CPU like the multiplier.

It seems like I would just be overclocking a 1.2ghz if I set it from 100 to 133mhz? I'm thinking that Googlegear ripped me off and sent me a 1.2ghz instead of a 1.6ghz though i'm a newbie so maybe not. Should I have to set it to 133mhz manually?

With most mobos you do have to set it manually.

I thought a thought, but the thought I thought wasn't the thought I thought I had thought.

 

[ath0mps0]

Also, it says the max speed I can set it to is 132, does this seem normal? heh

Some motherboards have a jumper or setting to change the PCI/AGP divider - if you don't change this from 3:1 to 4:1, you won't be able to up the clock to 133.

I thought a thought, but the thought I thought wasn't the thought I thought I had thought.

 

[CMRvet]

sorry, double post... server failure


<P ID="edit"><FONT SIZE=-1><EM>Edited by CMRvet on 03/03/02 01:42 AM.</EM></FONT></P>

 

[amd_builder]

I understand what you are saying guys but I can't set it to 133mhz I will see if I can fool around with the pci/agp dividers to see if I can make it boot up, though i'm not sure there are any settings for that heh. Sorry for all of these stupid questions but this is my first time building my own system.

 

[ath0mps0]

I'd look at the Soltek website to find the appropriate settings, but I can't get to it - it seems to be down (one reason I stopped buying Soltek back in the K6-2 days).

I thought a thought, but the thought I thought wasn't the thought I thought I had thought.

 

[amd_builder]

Soltek website is: www1.soltek.com.tw, if you don't put the 1 in it doesn't work for some reason.

Well anyway, thanks a ton for all of the help -- I just physically adjusted two switches on my motherboard and am now running my Athlon XP 1900+ at 1.61GHZ !

 

[CMRvet]

going to sleep now... 4:00 in the morning here.

 

[Matisaro]

Motherboards come with 100 default incase you actually do have a 100mhz chip, a 133fsb chip running at 100=no problem.
100fsb chip@133=possibly fry and no boot. Think about it.

"The Cash Left In My Pocket,The BEST Benchmark"
No Overclock+stock hsf=GOOD!

 

[Matisaro]

Why? Try putting a Athlon 1000/100 on a board with 133 MHz FSB set by default, it wont even boot since it is attempting to run at 1333 MHz!

Off topic, I have never seen a tbird@1000 which wouldnt do 1.33. (from the newer steppings mind you).

"The Cash Left In My Pocket,The BEST Benchmark"
No Overclock+stock hsf=GOOD!

 

[girish]

yes, true the example was bad. actually i should have said about some other model that doesnt do 25% overclock too easily.

what i really meant that it cannot be generalised that any chip would work straight 25% OCed, thats why the default is set to 100 MHz.

;-) girish

<font color=red>Nothing is fool-proof. Fools are Ingenious!</font color=red>