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Old Athlon XP1800 question....

moggsy

moggsy

moggsy

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Joined
11 Dec 2006
Posts
223
Hi all

Got a mates old Athlon XP1800-based machine to sort out one or two probs and noticed at boot up, it's being reported as an "Athlon 1150mhz"

The mobo is a Giga GA-7DX+ and it has a jumper on the board for 100/133 fsb selection and it was in the right position for 133 but the cpu clock speed was showing as 100 in the bios. I upped that to 133 but there's no option I can find in the award bios to set the multiplier to the necessary 15 to give it's correct speed of 1530mhz (processor locked??). Anyway, I saved and exited with it set to 133 and the post then showed it as an Athlon 1800...great, I thought.

WRONG!!

Everything seemed to starting up normally as it went past the black "Windows XP" screen but then it blue screened and wont have it.....


Any suggestions?

Thanks ;)
 
Make sure the RAM is at least DDR2100, if it is try upping the volts to the RAM a notch, might have to have a play with the settings as well, if you can, set the cpu vcore to 1.65v manually and make sure the cooling is doing its job.
 
Hi,

Fairly sure the XP1800 should be 11.5 x 133 to give 1.53, all the XP chips were 266FSB or greater.

I remember having an olde board , Asus with VGA built in I think.. where the legend on the board was the oposite of the FSB jumper so it had to be set to 100 to enable the 133FSB.

I'd also check that the jumper actually has the metal insert and I've known that to go missing before now
AD
 
decto said:
Hi,

Fairly sure the XP1800 should be 11.5 x 133 to give 1.53, all the XP chips were 266FSB or greater.
Click to expand...

My bad...that's what I meant to say....:rolleyes:

I'd also check that the jumper actually has the metal insert and I've known that to go missing before now
AD
Click to expand...
Good point that, and very relevant possibly....it's not a plastic/metal jumper that fits over two pins as such...it's an actual [very small] switch block with off/on positions, but it seems very iffy - there's no 'click' into either position - just a smooth movement and doesn't seem very positive at all really.
 
There's a series of CPU frequency override dip switches that were set to 'Auto' so I set them to 11.5X and set the jumper to the 133 position. I re-entered the bios and put the CPU Clock to 133 too, and rebooted - the post reported it as the correct Athlon 1800 and I could boot into windows in Safe Mode and click here there and everywhere with no lock-ups etc, but as soon as I booted normally, it wouldn't have it.

My mate said he wanted the PC formatting and re-installing in XP anyway so I zapped it and did a clean install. During the install, it seemed to just sit there doing nothing at the 'Preparing Installation' stage so I had to reset the pc, when the setup resumed, this time it carried on to completion, however, it still wont boot into windows on it's first run... :mad:

If I return the CPU Clock back to '100' it boots up no probs but it's oviously then only reported as an 'Athlon 1150' during the post...

Bit stumped here :(
 
It sounds like dodgy memory, if it has 2 sticks try removing one and booting at 133fsb with only 1 ram stick.
 
The temps are high - bout 62C. I've got some thermal compound to apply but I've never cleaned any of it off a used chip before.....what's the best method for cleaning all the old crappy stuff off?

Thx for everyone's input so far btw ;)
 
I use acetone, but stuff like nail varnish remover or STP's Brake Cleaner (halford's) will do the biz, just make sure you get curd from the sides of the core.
 
there's a possibility that (if you've reseated the cooler) that you've chipped/cracked the core. wierd things happen to them when you do that!
 
Well it looks like it might be a dodgy stick of ram then, as I've yet to have a go at re-applying some fresh paste.... In work the last 2 days so I might take out a stick of ram tonight and see how that goes.

cheers for now.
 
If its not dodgy RAM then maybe the motherboard does not officially support the CPU so it will only work at a reduced frequency and in safe mode at the correct speed. Try updating to the latest BIOS and maybe even the PCI bus divider isnt kicking in at 133FSB, try 134FSB and see if it works. I had a board with the same chipset at 156FSB with a Athlon XP1700 Tbred B and it worked fine until the capacitors were shot.
 
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