Athlon XP 3000+ not fast enough

quantumcougar

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Aug 2, 2004
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I have a Shuttle AN35N-Ultra motherboard and an Athlon XP 3000+ with a 400 MHz FSB. I'm only getting a CPU speed of 1043 MHz. The FSB in the BIOS is currently set at 100 MHz. What BIOS settings should I use to get full performance from it? I'm not looking to OC it, I just want to run it at it's rated speed.
 

Obtuse

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May 21, 2004
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First of all, the xp 3000 is a 333 mhz fsb processor, look it up. So, you would want to change your fsb to 166 in the bios. Overall, your processor should be running at about 2.16 ghz.

"It's too late now anyway. That song is stuck in my head and the only way to get rid of it is to blow it out. With a bullet!! - Carl
 

phial

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Oct 29, 2002
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So, you would want to change your fsb to 166 in the bios

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endyen

Splendid
Wrong! The new xp3200+ chips use a 200mhz fsb.This speed is generally called 400 because of DDR. In most bios it is called external processor speed, and should be set to 200.
The multiplier is 10.5, with a 166 fsb, his chip would be slower than an xp2500+.
 

endyen

Splendid
I know that DDR has really screwed the concept of FSB. The thing is, that in bios, most socket A boards have a range from 100mhz to 300mhz. For the old xp3000+ chips, this was set to 166. With the new chips, the setting is 200mhz, just like the xp3200+ chips.
If you look at the original post, he said he was using an fsb of 100, and his chip was running at 1046mhz. That means his multiplier is 10.5. If he tries to run his chip with a "fsb" of 333mhz, the resultant speed would be 3.5 gigs, while at 400mhz it would be 4.2 gigahertz. Either of those would be major overclocks requiring better cooling than water. Liquid nitrogen anyone.
Since the interconnect between the chip, and the north bridge ( commonly called the front side bus) uses a square wave that oscilates from rising edge to rising edge (one cycle) 200,000,000 times per second, I call it 200mhz.
 

quantumcougar

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Thanks! I wrote down the processor ID # before installing, which was AXDA3000DKV4E. AMD is calling it a 400 MHz FSB, so I should set it in the BIOS as 200 MHz to bump it up to proper speed. I appreciate the info. Also I read in another thread about "locking your AGP bus, therwise the AGP bus will speed up as you increase the FSB speed which leads to a wiggy video card." Is this correct? I'm running an ATI Radeon 9600 Pro.
 

endyen

Splendid
Only true if you are using nonstandard fsb, like 188.
Your motherboard has multiple dividers that it can use for pci/agp buses. At 200 mhz, it will use 6X for pci, and 3X for Agp. If you decide to OC, set your pci and agp to 33 and 66 respectively.