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  #1 (permalink)  
Old 4th January, 2004, 08:48 AM
Join Date: January 2004
Posts: 1

EP-ZXA and new CPU

Hi I'm trying to upgrade my old Celeron 333 to a PIII 550. My motherboard is the EP-ZXA. I believe the bios is Award 4.51PG.

My problem is whenever I install the new CPU, windows will freeze. I have entered BIOS and watched the CPU temp and it remains at 90-105 F.

It is the same temp as the old CPU. During boot up, it will either freeze when checking devices or loading windows 98. The computer is rather old. I believe somewhere it says that it is last updated April of 97/98.

Is there a bios upgrade to fix this or not?

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  #2 (permalink)  
Old 4th January, 2004, 03:48 PM
Shrekster1980's Avatar
Join Date: December 2003
Location: Staffordshire
Posts: 51

Your motherboard will support pentium 1,2,3 and celron chips. Try setting the FSB jumper on your board (near processor) at 66mhz and 100mhz and se which one is stable. But before you do that see sites below

try the site below for upgrade bios:

try the site below for processor support

Bad Luck? It Never rains, but it pours

Sys 1: P4 3.06 FSB800 @3.127 , Epox 4GEA800I , Melco 1024Mb DDR400 PC3200 (2x512), Radeon 9600xt Pro 256MB DDR, Seagate Baracuda 7200RPM 120Gb x 2, Creative Labs Audigy 2Ex, Creative Megaworks 550Thx Surround sound

Sys 2: P4 2.8 FSB533 @2.897Ghz , Epox P4MKI Via P4M266A + VT8235 , Melco 512Mb DDR333 PC2700 (256x2), Gainward G-Force FX5200 128Mb DDR Pro660 TV/DVI, Hitachi Decstar 80Gb Ultra ATA133 7200RPM
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  #3 (permalink)  
Old 5th January, 2004, 09:38 AM
EPoX Tech's Avatar
EPoX Tech
Join Date: October 2001
Location: Seems not to matter
Posts: 4,720

This mainboard can only support Mendocino, Katmai and other 0.25micron process cores IF AVAILABLE - hence 90% of P3 are incompatible, as are the majority of Celeron's except those PPGA parts to 533MHz.

Would suggest seeing if your Celeron will o/clock to 500Mhz by jumper movement to 100FSB, as short of replacing mainboard processor and memory you may be hard pushed to find a faster 0.25micron processor.
If you need EPoX BIOS eeproms in the UK, goto
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