K6-2 550 Protection Error

[SniffingGeneral]

I run a GA5AX with a k62 450 with no problems. I've just bought a 2nd hand 550, and it's giving some hassles;

Fitted the chip, fired the box up, and it worked fine. Ran a benchmark with Norton Utilities, also fine. Then tried to open AOL, and the box restarted itself.

Now whenever I try to start windows with the new chip I get "Windows Protection Error you must restart your computer" message. Replacing the chip with the old one results in a perfectly working system again.

I dual boot BeOS on the same box, and the BeOS works fine with the old and new chip, it's only windows (98Lite) that gives the problem.

I have tried running the new chip with a clock speed of 100 and a multiplier of x5.5. The chip is marked 2.3v core / 3.3v io, and I have tried running it at 2.2v and 2.3v, with no difference.

Hope someone can help

Spec;

GA5AX
GoldenOrb FC0370 Cooler, additional exhaust blower and HDD cooler
Soundblaster 1024
Geforce2 MX (Hercules prophet)
2x 64Mb 100Mhz RAM (1 crucial tech, 1 unbranded)
VoodooTV card
OSes; The BeOS PE and Windows 98 Lite with 95 shell

 

[Neo415]

There was a problem with windows 95 with the AMD K6-2
You had to down the clock speed to 300Mhz and install a patch, then you could operate at full CPU speed.

This sounds like the same thing is happening here, although
both AMD and Microsoft say that win98 resolved this problem.

http://www.amd.com/products/cpg/k623d/win95_update_k6.html

Microsoft Article - Q192841

I would try a copy of win98 2nd edition, perhaps the lite copy still has the same problem that 95 did...

 

[Neo415]

There was a problem with windows 95 with the AMD K6-2 You had to down the clock speed to 300Mhz and install a patch, then you could operate at full CPU speed. This sounds like the same thing is happening here, although both AMD and Microsoft say that win98 resolved this problem.

http://www.amd.com/products/cpg/k623d/win95_update_k6.html

Microsoft Article - Q192841

I would try a copy of win98 2nd edition, perhaps the lite copy still has the same problem that 95 did...

 

[butchrecon]

There could be a problem in the CACHE handling for Win98. If the BeOS works fine and 98 does not its with the processor. It ould be bad cache. Try disabling the internal and external cache (I know it will slow you down, but we are troubleshooting). If it boots turn them back on 1 at a time. If it errors out on either on e then you know what the problem is. James Collins
Systems Support Engineer
A+, MCP

email: butchrecon@skyenet.net

Please let us (Tek-tips members) know if the solutions we provide are helpful to you. Not only do they help you but they may help others.

 

[eliot]

I just had the same issue 2 days ago when I upgraded my 400mhz to 1.1ghz. I tried re-installing Windows98, but it didn't help. I had some various hardware conflicts as well that didn't want to resolve through system reconfigs, so I decided to format my HD and start with a fresh install. I haven't seen a "protection error" message since.

 

[SniffingGeneral]

Thanks to all who replied, problem has been sorted thanks to tips found elsewhere on this forum.(can't remember where unfortunately)

It seems like eliot's solution was the way I was going to have to go, apparently windows doesn't like you to change hardware after installation. I figured either a reformat or maybe a registry hack to remove the chip specific sections.

Finally I downloaded vxdfix.exe from

http://members.home.net/revolutn,

which contains a batch file to replace your vmm.vxd, as soon as I did that, problem solved.