AMD Semphron 2800+ Detecting as Athlon MP

August 9, 2010 at 19:08:26
Specs: Windows XP Corporate, Pentium 4 HT wth EMT64 @ 3.00 GHz, 1 Gb.
Hello, I have an AMD Semphron 2800+, 1.6 GHz, that is detecting as an AMD Athlon MP through CPU-Z 1.53. The BIOS detects it as an "unknoathlon", Unknowen Athlon. The Motherboard is a Gigabyte GA-7VTXE. CPU-Z doesn't say what model of MP it is detecting though.
Also, I have it over clocked to 1.93 GHZ and it is still slower than $hi+.


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August 9, 2010 at 19:44:58
Update the BIOS.

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August 10, 2010 at 12:55:39
I think you should be looking at the Drive probably you have a dead spot on the drive or it is heavily fragmented make a good back up of your system. Using a third party backup software “I have very little confidence in Microsoft backup software” Go to

1 Download Disk Wizard.

2 Remember to make a boot disk, with Disk Wizard.

3 Use Disk Wizard to make mirror image of your drive, if you have a spare hard drive use that. If not you can format your partition and use that. If no partition you have to find another mirror image software that will make image to DVD/CD drive I don’t think Disk Wizard will that. I haven’t tried.

4 Then wipe the hard dive and restore your back up with Disk Wizard.

5 When your system comes back up, go and run defragmenter and if you see if the defragmenter leaves a space and begins storing some files after a section of blank space and then doesn’t clear that blank space after several attempts to defragmenter get a new hard drive and restore your backup image to that either way this procedure will speed up your computer as much as A fresh new boot would however if you have a dead spot on the drive in about a month it will drastically start slowing again maybe sooner depending on how You use your computer. If you download a lot of stuff from the internet and or uninstall a lot you find your computer will slow much quicker than if you just run your normal stuff or just use it to surf the web. There is no better way to speed up any system then the forgoing procedure. Over clocking the processor will not speed up any but oldest and most obsolete of computers because any processor made in the last 10 to 15 years is already much faster then the bus although bus size and speed has improved in a many years it is the processors which have been erroneously been given credit for the increase in speed if the truth be know
You could hypothetically speaking take an old Pentium and put it a new system and you would not be able to tell the difference between 900 MHz and 9 GHz. Because it’s the bus that’s your bottleneck, but they gota sell processors, so they don’t tell you that. Moreover if you overclock your processor all you’re going to do is shorten its life span heat is the enemy of all processors and the reason it took so long to break the 1 gig limit. Hard drive maintenance is the key to speed as long as you have enough memory onboard, again do not overclock your processor if you have a system with any thing newer then an Intel 80586 or made after 1995. A little sarcastic maybe but this issue demands that. Because it is something that should have been, well understood by now.

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August 10, 2010 at 13:56:34
Do NOT listen to this moron. CPU recognition has absolutely nothing to do with the hard drive or software. If the BIOS doesn't contain the CPU info in it's internal "database", the CPU will be recognized as "unknown". Updating the BIOS will update the CPU "database", but your board has to support the CPU in the 1st place. Other than that, you didn't list how much RAM, how you have it configured, which HDD or video card you're using.

Your motherboard doesn't support the Sempron or ANY 333MHz FSB CPUs, so it will be forced to run at 266MHz FSB.

"I have it over clocked to 1.93 GHZ"

The Sempron 2800+ is supposed to run at 2.0GHz (12 x 166MHz)'s not overclocked, it's underclocked. Even so, if you're running the CPU frequency at 160MHz without the PCI/AGP locked at their defaults, you're just asking for problems.

You should also be running the CPU & RAM at the same frequency....this is very important for a socket A system. Anything other than 1:1 ratio will hurt performance.

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August 11, 2010 at 06:57:50
Additional comments:

With the CPU frequency at 160MHz & the PCI/AGP not locked down, the PCI bus will run at 40MHz & AGP bus at 80MHz. This is well over their default speeds of 33/66 & also beyond the safe max of 37.5/75. If you didn't encounter problems right away, there's still a chance that the data on your HDD will eventually become corrupted because IDE drives use the PCI bus. You may also run into problems with the sound & video.

I suggest you either get a CPU that's supported by the board or get a board that supports the Sempron. At the very least, limit your CPU speed to 1.8GHz (12 x 150MHz) to stay within the safe max for the PCI/AGP.

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August 11, 2010 at 18:21:40
Updating the BIOS won't fix the problem, my motherboard doesn't support any Sempron. I haven't had any problems though. I was going to give away this computer, but I think I will just try my old AMD Athlon XP 1800+ which is supported by the motherboard.

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August 12, 2010 at 14:52:09
So why did you try the Sempron if you knew it wasn't officially supported? It's a MUCH better CPU than the AXP 1800+ anyway & deserves a better home than on that crappy motherboard.

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August 14, 2010 at 14:35:03
I didn't know the mother board didn't support the processor untill I went to the site looking for drivers.

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