Swapped 466 for 766 Celeron on LX mobo, now WinXP hangs...

Maetryx

Diamond Member
Jan 18, 2001
4,849
1
81
Maetryx here, :cool:

I've got a project going where I'm trying to max out an HP Brio 83xx computer with an old intel LX, Slot1 motherboard. The motherboard says Taroko Lite or something on it. Anyway, I've been running a Socket 370 Celeron 466MHz on a cheap slotket for 2 years.

I thought I would try to upgrade the thing to a 766MHz Celeron. It's the fastest 66MHz FSB Celeron, which is the only speed this mobo can handle. Voltage is an issue, because the motherboard doesn't go down low enough. It's supposed to have a vcore of about 1.7V.

My new MSI slotket can tell the motherboard a different voltage than default, which is a good thing, because it will not even POST with auto-detect enabled on the slotket. I set it to the lowest voltage the motherboard could handle: 1.8V. Some I'm a little high on the voltage, no biggie. I put some Arctic Silver II under the aluminum heat sink to make up for it.

But now the interesting part. Windows XP will not boot. I can boot off of a floppy disk, and dork around in DOS. But Windows XP hangs. It appears to be hanging on when loading C:\windows\system\DRIVERS\agp440.sys which according to the Device Manager is a driver for the intel LX/EX CPU to AGP controller device.

I can put the 466 Celeron back in, and boom! Problem gone. But the 766 makes the computer hang. That's really weird to me. Why would a faster CPU make the operating system hang? Like I said, it works fine in DOS. If I start it with Safe Mode Command Prompt, I can watch it load a screenful of drivers and hang on agp440.sys.

The BIOS (latest) identifies the CPU as a Pentium Pro 500. I wonder if it's screwed up because the BIOS tells the system a CPU that doesn't run on an LX chipset. I triec putting in a PCI video card instead, but it didn't change anything.

Anyway, help me out please. I really want this to work. Otherwise I'm going to be the proud new owner of some other obsolete motherboard that will run a 766MHz Celeron.
 

Maetryx

Diamond Member
Jan 18, 2001
4,849
1
81
Ha ha ha! Not a chance. It's an HP Brio. It has a fancy-ass super-untechnical BIOS setup. There is *one* item in the Advanced Chipset screen. Thanks for looking, though.

Anyone else have an idea? Why does a 766MHz CPU make Windows hang, but not DOS? It almost has to be a driver, and it may be that agp440.sys.

I'll probably end up freshly installing Windows while the new CPU is in to see if it gets any happier.