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cpu not recognized by mobo correctl

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Original Message
Name: bruno buys
Date: October 15, 2004 at 19:49:31 Pacific
Subject: cpu not recognized by mobo correctl
OS: suse 9.1
CPU/Ram: athlon 2000 / 512mb
Comment:

I can't have my cpu Athlon XP 2000 correctly recognized by the mobo. Its an Abit KV7. Tried to set it through the softmenu bios, but not a single options works. After I save and exit bios, the pc can't reboot. FSB 133 and x12.5 factor won't work, as the vendor told me.
Any thoughts are welcome!
Thanks!



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Response Number 1
Name: enterprise
Date: October 16, 2004 at 02:32:07 Pacific
Reply: (edit)

Well to fix this problem you need to reset you bios or cmos to do this there is a little watch battery on your motherboard you need to remove that and leave it out for an hour or so which will cause the motherboard to lose its memory which causes it to reset its self to its defaults, after the hour has passed put the battery back in, your bios should now recognise the proper properties of your cpu.

Enterprise


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Response Number 2
Name: jam
Date: October 16, 2004 at 05:20:07 Pacific
Reply: (edit)

If you're making BIOS adjustments, you're obviously able to boot up...what's your CPU being recognized at if not a 2000+?

I'm guessing that you already know how to reset the BIOS. There's no need to leave the battery out for an hour...a minute will do...just make sure to have the power cord unplugged or the BIOS may not clear.

In the Softmenu, make sure the CPU Operating Speed is set to "User Defined"...then set the CPU FSB Clock to 133, & the Ratio (FSB:AGP:PCI) to 4:2:1. Set the multiplier factor to x12.5

Make sure you have the extra 4-pin/12v plug connected....it plugs into the board just behind the keyboard/mouse ports. There's also a jumper on the board next to the memory slots...it's labeled CROM1...it's for S2K mode? I'm not certain what that is? Maybe these will help:

http://www.overclockercafe.com/Reviews/mobos/ABIT_KV7/

http://www.abit-usa.com/products/mb/products.php?categories=1&model=125

Asus A7N8X-X
1800+ @8x210mhz
512mb PC3200
Ti4200/8X 128mb
WDC 60GB


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Response Number 3
Name: bruno buys
Date: October 16, 2004 at 12:46:35 Pacific
Reply: (edit)

Thanks guys,
Well, the problem has become quite more complex. I returned the computer to the vendor and he managed to get the cpu to be recognized as a xp 2000. Just to let you know: it was being probed as Athlon 1263MHz, oddily, with clocks varying from 1250 to 1263 MHz.
I don't know what he did (guess he flashed the bios), but when I got home and retried to power it and install system, my surprise is: I couldn't install anything on it!
The machine hanged, rebooted randomly, freezed and so on. Tried several times, with different linuxes and windows, to no avail.

I called the damn vendor again, and next week I'll return the machine definitely.

Jam, what does this extra 4-pin plug do? do you believe it can be related to the problem? I have already packed the computer into the box, but I'm almost sure it was unattached.

Thank you guys again!


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Response Number 4
Name: jam
Date: October 16, 2004 at 13:44:22 Pacific
Reply: (edit)

I believe the extra 4-pin plug supplies addtional power for the CPU...if you didn't have it attached, my guess would be that's what your problem is (or was). Does your PSU even have that type of plug?

Asus A7N8X-X
1800+ @8x210mhz
512mb PC3200
Ti4200/8X 128mb
WDC 60GB


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Response Number 5
Name: bruno buys
Date: October 17, 2004 at 08:07:05 Pacific
Reply: (edit)

Hi Jam, thanks again for your assistance,
I was wrong, the 4pin plug exists and is attached correctly.
After several tests on the machine, I found that:
- It works fine as a Athlon XP 1900+ (1600MHz). Also with lower clocks (XP 1800+, 1700+, etc...)
- It definitely doesn't work as an Athlon XP 2000+. It posts and finds the bootable cd, but the boot process hangs after loading the kernel. In the distros I tried, some display seg fault messages, while others display the contents of the registers, stuff like that.
- If I set manually the values of the fsb and multiplier factor (Abit's SoftMenu enabled), the best I can get is around 1640 MHz. A 2000+ cpu was supposed to be running at 1667MHz.

I feel like I am overclocking this 1900+, by setting it above 1600MHz. It works, but it wasn't supposed to be so, right?


Other than that, the machine works. I mean, when it boots, everything is fine. I left it powered on for some time with linux running ok...

The only thing is, I paid for a 2000+, not a 1900+.

I have to decide what I'll do with this computer, in order to talk to the vendor tomorrow. Do you think its reliable to keep this machine, changing only the cpu to another 2000+? Or I should change the entire computer?


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