My horrible AMD upgrade: Where did I go wrong?


Aug 7, 2007
Below are my PC Specs.
My HDD has a partition on it for Vista.

I decided to calm down get less pissed and start from the beginning to figure out where I went wrong.

I wanted to upgrade my PC so I bought a 3000+ (333mhZ FSB) CPU off E-Bay w/some Arctic Silver 5 paste.

I simply popped open my case replaced the CPU and assumed it was easy as that.

I was wrong.

When I got to the BIOS it said that since I had a new CPU it was going with the lowest CPU speed and I could adjust it all the way to 2100. I didn't touch a thing, exited from BIOS and I could not get into Windows XP. I saw a white block at the top and that was it.

I was able to update my BIOS to what ASUS stated would be the correct update from 1008 to 1009-005 for the 3000+ and I still could not load Windows so I decided to format my HDD to see if that would work.

When I restarted my PC I could see it registering my CPU as a AMD 2100 CPU so it was recognized.

I pressed F6, put in my SATA drivers from my floppy and it would get to "setup is starting windows" and just hang there. I would get into BIOS see the system time running but as soon as I touched a button it would freeze.

I am at a loss as to what went wrong? I posted a similar topic on another thread and a fellow member suggested that I needed a larger power supply. He may be right but I am such a newbie I don't know. I don't even know how to adjust the front side bus. I wonder if I had improper BIOS settings or maybe the partitioned HDD threw it off.

I am not even sure if I posted this in the correct thread.
What is the proper way to upgrade a CPU?

My PC Specs:
1.33 GHz AMD Athlon Thunderbird
110GB Western Digital WD 1200
Pioneer DVD-ROM
1536mb of PC2700 RAM
Audigy 1 Sound Card
GeForce 6200 256MB Video Card
DLINK Ethernet Card
V-Tech 350 watt PSU


Apr 24, 2006
Did the system work fine with the previous CPU with nothing else changed? Are both CPUs single-core? Have you considered that the 3000+ is simply a defective CPU? Many purchases from Ebay are faulty...


Maybe the reason it's on e-bay in the first place is because someone overclocked it until it blew? Never buy things like video cards and cpus second hand unless it's from someone you trust.


Jun 24, 2006
Your new CPU hould work fine on that mobo unless it's defective. Reinstall the old CPU and see is it works again. If it does, you probably just got a bad CPU off ebay. Good luck getting a replacement/refund.


Jun 5, 2006
on your mobo their will be a jumper, set it to 333mhz fsb, that is your problem, amd boards don't detect their cpus via cpuid, they do it via clockspeed.


May 10, 2007
Have you done what megame255 said and replaced the old cpu? What about disabling SATA in the bios and trying to install like that? XP can have some issues with SATA, even if (like you) you have the drivers.


Aug 7, 2007

I did and I was able to re-install w/out a hitch.


I would increase the memory voltage to 2.7v and maybe add a .05v to the CPU. since your system is old, maybe the PSU is not up to the task, so increasing voltage may help to stabilize the thing. If you can try a newer PSU, this would help to see if it is a power issue.


Aug 7, 2007
"It's working! It's working!" - Anakin Skywalker The Phantom Menace

I had to go with the following settings...

CPU Speed [1750MHz]
CPU Frequency Multiple [10.5x]
CPU External Frequency [166/33]

When I was able to log into Windows the "My Computer" stated it as...

AMD Athlon XP 1600+
1.75GHz, 1.50 GB of RAM

I wonder why that is. Can they physically fake a CPU look like a 3000+ Barton?

no - your CPU is just working at half speed.
A CPU clock on socket A is determined with the following formula:
Front Side Bus x Multiplier = operating frequency.
Mot CPUs have a locked multiplier - varying the frequency is thus done through FSB modulation.
Moreover, RAM speed is usually sync'ed with the FSB for best performance - and may work at 166, but not at 333...

Your CPU's original settings should be:
333 x 10.5 = 3496 MHz (rounded at 3500)
However, that far too high for an Athlon XP; it should only be
233 x 10.5 = 2446 MHz (rounded at 2500 MHz) rated 3100 compared with original Athlon's speed.

However, it seems that your CPU or your memory is unable to hold its normal frequency. Reducing the FSB to 166 yelds:
166 x 10.5 = 1743 MHz (rounded at 1750).

This may come from several points:
- you haven't connected the square 12V connector on your motherboard
- your motherboard has leaking voltage regulators, making it unable to hold such high frequency
- your RAM is set on a 1/1 ratio with FSB, and can't work at 233HMz (no DDR from the days of Athlon 1333 can - duh!)
- your PSU is too weak to hold the load
- your CPU got sunburnt (overclock) and can now work only at reduced clock speeds.

My advice: first try a new PSU (can't hurt: you should change it once in a while), don't forget the 12V line, then try locking the memory speed at a lower ratio (FSB 3: RAM 4, or Memory speed = FSB -33%) and running the CPU at normal frequency.

If it still fails, then go back to a lower clock speed (1750 MHz) and tighten your memory timings (1:1 FSB/memory ratio, lower CAS, lower RAS...).


May 20, 2004
The Athlon XP 3000+ is a 2.166 GHz CPU with a 166 MHz FSB and a x13 multiplier. Increase the multiplier if it allows you to do so to the CPU's max of x13, which will generate the correct speed and ID for the processor. If you cannot change the multiplier to x13, then the CPU was not a 3000+ to begin with.

Unfortunately, if you are able to change the multiplier, that means the CPU you have has been modified by its previous owner, likely for the purposes of overclocking. Overclocking can damage a CPU and cause it to behave erratically or stop working altogether. To check for modifications, look on the bottom side of the CPU for any wires, lines of solder or graphite, or other suspicious material linking any two of the pins together (all of the pins should be electrically isolated on the bottom of the CPU). You may not find anything, but that doesn't mean the CPU wasn't tampered with.

As a side note, it is normal for Windows to mis-identify over- or under-clocked Athlon XP CPU's, as it relies on the clock speed of the processor for ID.