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Author Topic: Mixing PC100 and PC133 RAM?  (Read 3792 times)

Mark

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Mixing PC100 and PC133 RAM?
« on: June 04, 2001, 01:23:45 PM »
Should I keep my old 64MB PC100 DRAM hooked up if I was to add 128MB PC133 SDRAM to my machine? Will this cause any problems?
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Offline Josetann

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Mixing PC100 and PC133 RAM?
« Reply #1 on: June 04, 2001, 09:18:45 PM »
It *shouldn\'t*, I have PC100 and PC133 mixed right now, three different brands in fact (PNY, Crucial, and Kingston).  If you have problems, it\'s probably because you\'re mixing brands instead of the speed.
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Mark

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Mixing PC100 and PC133 RAM?
« Reply #2 on: June 05, 2001, 07:05:30 AM »
Thanks Joseph, I have one other question for you then... I got the 128MB PC133 SDRAM before I realized that my board is only 100Mhz FSB... should I still be able to use it? I\'m running Windows 98 if that makes any diff?
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Offline Josetann

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Mixing PC100 and PC133 RAM?
« Reply #3 on: June 05, 2001, 07:50:29 AM »
Yes.  All RAM is *supposed* to be backwards compatible, meaning PC133 should work on a 100MHz, or even a 66MHz board.  There were some problems with the early PC100 sticks not working with 66MHz boards, but for the most part it works fine.
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MarkF56

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Mixing PC100 and PC133 RAM?
« Reply #4 on: July 06, 2001, 02:15:07 AM »
As indicated the PC133 *should* run in a PC100 mobo but only at the 100MHz speed - for most ordinary users this is not a problem though.
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Anonymous

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Mixing PC100 and PC133 RAM?
« Reply #5 on: September 10, 2001, 11:34:43 PM »
BE CEARFULL MOST OF THOSE OLDER THAN THE
TX CHIPSET BOARDS CAN PERMINANTLY DAMAGE PC100 STIKS

I.E  I TRIED MY 32MB PC100 DIMM IN MY OLD VX C/SET BOARD ABOUT 2 YEARS AGO AND ENDED UP WITH A 9MB STICK (IT BLEW HALF AWAY)

REMEMBER THE VX CHIPSET WAS WHEN THE DIMM WAS INTRODUCED SO I SAY ANYTHING OLDER THAN THE TX CHIPSET DONT USE YOUR NEW STICKS IN
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Dogbert

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Mixing PC100 and PC133 RAM?
« Reply #6 on: October 17, 2001, 08:15:37 AM »
PC 100 Ram in a VX? No worries, it works on my Pentuim 233. Sure it was conincidental?

Btw, PC133 and PC100 should work fine together, its when you mix PC66 and PC133 that you get problems.
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Anonymous

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Mixing PC100 and PC133 RAM?
« Reply #7 on: October 23, 2001, 02:44:52 PM »
Hmm I put a 133 256 meg chip in with 2 256meg 100s and while my machine booted and SAID it had 768megs of ram I also got errors on bootup about being out of memory from NAV. I didnt even realized I had mixxed speeds and was having a fit figuring out why it was saying that.
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Anonymous

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Mixing PC100 and PC133 RAM?
« Reply #8 on: October 27, 2001, 03:33:15 AM »
What chipset are you using? AFAIK, the BX chipset will support only 512MB of unregistered SDRAM, any more than that and you will need registered.  Perhaps that is causing your problems.
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Offline rdc

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Mixing PC100 and PC133 RAM?
« Reply #9 on: October 30, 2001, 01:26:32 PM »
I have also mixed two 256mb pc133 sdram with one 128mb pc100 sdram and they seem to work perfectly together

When you know you have enough you are rich !
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Anonymous

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Mixing PC100 and PC133 RAM?
« Reply #10 on: February 05, 2002, 05:06:47 PM »
Probably was set to 5 volts. Most older boards had this ability, but I have never seen 5 volt 168 pin dimms. I think it was for some EDO ram that never cautht on.
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