Re: OFFTOPIC: SDRAM PC100
On Thu, 3 Jun 1999, Kenneth Scharf wrote: THREAD: -- On Wed, 2 Jun 1999 [EMAIL PROTECTED] wrote: The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope. I bought 2 128MB PC100 for my 66MHz ASUS, hoping that the dimms would still be usable when I get a new motherboard someday. I ran memtest86 for about 24 hours, no problems, and have been running fine ever since (several months). I started having problems recently (filesystem errors and signal 11) so I ran memtest86 again and one of the dimms has gone bad. I took it out and put back in an old regular 32MB dimm, and the two mixed togeter (160MB) ran memtest86 fine overnight, and seems OK after about a week. I don't know why the dimm went bad. I wouldn't think it's because the 100/66MHz issue. Please explain why you think PC100 shouldn't be in a 66MHz board. Do you have any ponters to info on the web? - REPLY: Dimms were made in two flavors EDO and SDRAM. They are also made in two voltages 3.3 and 5. If your computer is strapped for 5 volts you might be able to run a 3.3v dimm for a while, in some cases it is possible to mix up edo and sdram, some MB:s support that but then must be ensured that SDRAM can handle 5V. there is such sdrams... I have successully used simms and dimms on same system and had no problems what so ever even my system was overclocked. Pasi S
Re: OFFTOPIC: SDRAM PC100
I am running a PC100 128mb SDRAM dimm on a 300a Celeron machine which is only at 66mhz bus speed by normal. And it runs fine. -Original Message- From: Andrei Ivanov [EMAIL PROTECTED] To: debian-user@lists.debian.org debian-user@lists.debian.org Cc: Debian user list debian-user@lists.debian.org Date: Thursday, 3 June 1999 5:05 Subject: OFFTOPIC: SDRAM PC100 Sorry for the offtopic question: I need to upgrade ram on one of the computers. It's a 3 year old Gateway, and it's got only SDRAM slots. The bus speed is up to 66 only. I've been looking at the ram prices, and everywhere I see only SDRAM PC100. As far as I understood from the docs, it's for computers with bus speed of 100Mhz. The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? TIA, Andrew -- Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] /dev/null
Re: OFFTOPIC: SDRAM PC100
On Wed, 2 Jun 1999 [EMAIL PROTECTED] wrote: The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope. I bought 2 128MB PC100 for my 66MHz ASUS, hoping that the dimms would still be usable when I get a new motherboard someday. I ran memtest86 for about 24 hours, no problems, and have been running fine ever since (several months). I started having problems recently (filesystem errors and signal 11) so I ran memtest86 again and one of the dimms has gone bad. I took it out and put back in an old regular 32MB dimm, and the two mixed togeter (160MB) ran memtest86 fine overnight, and seems OK after about a week. I don't know why the dimm went bad. I wouldn't think it's because the 100/66MHz issue. Please explain why you think PC100 shouldn't be in a 66MHz board. Do you have any ponters to info on the web? ...RickM...
Re: OFFTOPIC: SDRAM PC100
On Wed, 2 Jun 1999 [EMAIL PROTECTED] wrote: The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope. I bought 2 128MB PC100 for my 66MHz ASUS, hoping that the dimms would still be usable when I get a new motherboard someday. I ran memtest86 for about 24 hours, no problems, and have been running fine ever since (several months). I started having problems recently (filesystem errors and signal 11) so I ran memtest86 again and one of the dimms has gone bad. I took it out and put back in an old regular 32MB dimm, and the two mixed togeter (160MB) ran memtest86 fine overnight, and seems OK after about a week. I don't know why the dimm went bad. I wouldn't think it's because the 100/66MHz issue. I would surprise me too. I also run PC100 memory at 66 MHz with future upgrades in mind. Please explain why you think PC100 shouldn't be in a 66MHz board. Do you have any ponters to info on the web? One thing that may be important to watch out for is that some older motherboards need physically different dimms. We have a dual PPro with an Intel mobo, which apparently needed special (read: rare) dimms with the `nudges' in different places than where they are in the current dimms. The current dimms simply don't fit in the mobo. HTH, Eric -- E.L. Meijer ([EMAIL PROTECTED]) Eindhoven Univ. of Technology Lab. for Catalysis and Inorg. Chem. (SKA)
Re: OFFTOPIC: SDRAM PC100
The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope. Really? I thought that the ONLY difference between SDRAM for 66mhz and PC100 SDRAM for 100mhz was the access time (8ns vs 10ns). If they are both 72pin dimms, SDRAM (NOT ECC), and 3.3v why won't the faster one work in the slower computer? Faster EDO dram works in a slower computer (that also takes EDO), it is only a waste of money (unless you plan on upgrading to a faster cpu and the mother board can be strapped to go faster). === Amateur Radio, when all else fails! http://www.qsl.net/wa2mze Debian Gnu Linux, Live Free or . _ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com
Re: OFFTOPIC: SDRAM PC100
THREAD: -- On Wed, 2 Jun 1999 [EMAIL PROTECTED] wrote: The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope. I bought 2 128MB PC100 for my 66MHz ASUS, hoping that the dimms would still be usable when I get a new motherboard someday. I ran memtest86 for about 24 hours, no problems, and have been running fine ever since (several months). I started having problems recently (filesystem errors and signal 11) so I ran memtest86 again and one of the dimms has gone bad. I took it out and put back in an old regular 32MB dimm, and the two mixed togeter (160MB) ran memtest86 fine overnight, and seems OK after about a week. I don't know why the dimm went bad. I wouldn't think it's because the 100/66MHz issue. Please explain why you think PC100 shouldn't be in a 66MHz board. Do you have any ponters to info on the web? - REPLY: Dimms were made in two flavors EDO and SDRAM. They are also made in two voltages 3.3 and 5. If your computer is strapped for 5 volts you might be able to run a 3.3v dimm for a while, before it overheated and died. I don't think you can mix sdrams and edo's. === Amateur Radio, when all else fails! http://www.qsl.net/wa2mze Debian Gnu Linux, Live Free or . _ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com
RE: OFFTOPIC: SDRAM PC100
On Thursday, June 03, 1999 5:16 AM, E.L. Meijer (Eric) [SMTP:[EMAIL PROTECTED] wrote: The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope. Please explain why you think PC100 shouldn't be in a 66MHz board. Do you have any ponters to info on the web? One thing that may be important to watch out for is that some older motherboards need physically different dimms. We have a dual PPro with an Intel mobo, which apparently needed special (read: rare) dimms with the `nudges' in different places than where they are in the current dimms. The current dimms simply don't fit in the mobo. You hit the issue on the head here. Hopefully I won't screw this up since I can't find a reference about this on hand, but... PC100 DIMMs are unbuffered and run at 3.3v and are rated for bus speeds up to 100Mhz (at least they are SUPPOSED to run at 100Mhz (: ). I personally run them at 66Mhz and 75Mhz on a couple computers that I have. There is no problem with this: If my stupid Celery 300A would do it, they would be running at 100Mhz. There are 2 notches in a DIMM. Each notch has 3 potential positions. The first one is for buffered vs. unbuffered vs. (I don't know), and the second one is 3.3v vs. 5.0v vs. (I don't know). So the original poster needs to check his reference for his mainboard and see if it accepts 3.3v DIMMs or 5v DIMMs. If it accepts 3.3v unbuffered DIMMs, then he can purchase PC100 SDRAM and use them at 66Mhz for now, and later upgrading his mainboard/CPU, he will be able to run them at 100Mhz. Hope that helps. Jonathan Lupa ~ [EMAIL PROTECTED]
Re: OFFTOPIC: SDRAM PC100
On Thu, 3 Jun 1999, E.L. Meijer (Eric) wrote: On Wed, 2 Jun 1999 [EMAIL PROTECTED] wrote: The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope. I bought 2 128MB PC100 for my 66MHz ASUS, hoping that the dimms would still be usable when I get a new motherboard someday. I ran memtest86 for about 24 hours, no problems, and have been running fine ever since (several months). I started having problems recently (filesystem errors and signal 11) so I ran memtest86 again and one of the dimms has gone bad. I took it out and put back in an old regular 32MB dimm, and the two mixed togeter (160MB) ran memtest86 fine overnight, and seems OK after about a week. I don't know why the dimm went bad. I wouldn't think it's because the 100/66MHz issue. I would surprise me too. I also run PC100 memory at 66 MHz with future upgrades in mind. old SDRAM had 5V voltage, PC100 is 3.3V OK
Re: OFFTOPIC: SDRAM PC100
On Thu, 3 Jun 1999, Oleg Krivosheev wrote: I don't know why the dimm went bad. I wouldn't think it's because the 100/66MHz issue. I would surprise me too. I also run PC100 memory at 66 MHz with future upgrades in mind. old SDRAM had 5V voltage, PC100 is 3.3V But the DIMMs have notches in them that prevent you from using the wrong type. ...RickM...
Re: OFFTOPIC: SDRAM PC100
On Thu, 3 Jun 1999, Rick Macdonald wrote: Date: Thu, 03 Jun 1999 10:21:55 -0600 (MDT) From: Rick Macdonald [EMAIL PROTECTED] To: Oleg Krivosheev [EMAIL PROTECTED] Cc: E.L. Meijer (Eric) [EMAIL PROTECTED], debian debian-user@lists.debian.org Subject: Re: OFFTOPIC: SDRAM PC100 On Thu, 3 Jun 1999, Oleg Krivosheev wrote: I don't know why the dimm went bad. I wouldn't think it's because the 100/66MHz issue. I would surprise me too. I also run PC100 memory at 66 MHz with future upgrades in mind. old SDRAM had 5V voltage, PC100 is 3.3V But the DIMMs have notches in them that prevent you from using the wrong type. huh !?! just upgraded from 5V SDRAM to 3.3V PC100 SDRAM - same slot used, had to change mobo jumpers to switch to 3.3V. regards OK
OFFTOPIC: SDRAM PC100
Sorry for the offtopic question: I need to upgrade ram on one of the computers. It's a 3 year old Gateway, and it's got only SDRAM slots. The bus speed is up to 66 only. I've been looking at the ram prices, and everywhere I see only SDRAM PC100. As far as I understood from the docs, it's for computers with bus speed of 100Mhz. The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? TIA, Andrew
Re: OFFTOPIC: SDRAM PC100
The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope.
Re: OFFTOPIC: SDRAM PC100
On Wed, 2 Jun 1999 [EMAIL PROTECTED] wrote: The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope. Although there should be still some of this older stuff around. try: www.pricewatch.com hope this helps.
Re: OFFTOPIC: SDRAM PC100
* shaleh [EMAIL PROTECTED] writes: The question is: if I buy a SDRAM PC100 chip, will it work on a computer with bus speed of 66Mhz ? Nope. What? Why shouldn´t they run with a *slower* clock? The only thing that makes me think is that a 3-year-old computer has already SDRAMs... Colin -- Colin Marquardt [EMAIL PROTECTED]
