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Conference noted::ibmpc-95

Title:	IBM PCs, clones, DOS, etc.
Notice:	Intro in 1-11, Windows stuff in NOTED::MSWINDOWS please
Moderator:	TARKIN::LINND

Created:	Mon Jan 02 1995
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3023
Total number of notes:	28404

2939.0. "Celebris XL CPU Upgrades" by DABEAN::B_ROSE () Mon Mar 03 1997 13:49

    I had tried to upgrade a Celebris XL590 to a n XL5150 (using a 150M
    Intel upgrade chip). When I did this the system came up as an XL5120. I
    know I am missing something for when I tried the same with two XL5100s
    trying to make them XL5166 (166M chips) they came up as 133s. None of
    the systems lasted long as they crashed shortly after entering NT. I
    have tried to look for "the" jumper with no luck at all.
    
    I would appreciate your help in getting me going.
    
    Thanks
    
    Bruce

T.R	Title	User	Personal Name	Date	Lines
2939.1	BIOS rev?	HELIX::WELLCOME	Steve Wellcome SHR3-1/C22 Pole A22	`Mon Mar 03 1997 14:57`	3
	What's your BIOS revision level? The Celebris XL 590 is up to 2.04, I believe.
2939.2		LEFTY::CWILLIAMS	CD or not CD, that's the question	`Mon Mar 03 1997 16:40`	17
	Are these Overdrive chips or standard CPU's? If Overdrives, you need to upgrade the system BIOS, and they should report and work properly - it's a no jumper, plug in upgrade. If standard CPU's, you need the new BIOS, plus a new CPU daughter card- the one you have probably does not have the jumpers to set up the CPU internal clock multiplier for 150/166 Mhz. The Celebris XL590 that I have here did not have one of the 2 required jumpers - upgrading was the only choice (other than adding wires to the old board!). There are 3 jumoers involved - 2 for CPU clock multiplier, 1 for bus speed. THe clock multiplier has to be set for 1:2.5 for both 150 and 166 Mhz parts. Chris
2939.3	I'll try that	DABEAN::B_ROSE		`Tue Mar 04 1997 10:01`	4
	Thanks to both ... I will need to schedule downtime and then try your suggestions. I will be back whichever way it goes. Bruce
2939.4		QUARK::LIONEL	Free advice is worth every cent	`Tue Mar 04 1997 10:05`	6
	I know that my Celebris FP590, when upgraded with a 166MHz OverDrive chip, reports the speed as 120MHz in the BIOS report. But it really does seem to be running at 166, based on tests. (On the other hand, my HiNote VP535 sometimes says it has a P166 in the BIOS report, rather than the correct 133.) Steve
2939.5	BIOS did it	FREEBE::B_ROSE		`Fri Mar 07 1997 06:45`	9
	After doing the BIOS upgrade my system saw the 166 and we now have an XL 5166. I thank you all. We do have an NT server that crashes and we had to pull the 166 upgrade, but we think this is the version of NT we're using. Thanks Bruce