(usr-tc) HARC Memory (update)
Well, bad news... The memory chip I got is still wrong. The problem now is that the center notch is off by 3 or 4mm, however the voltage notch is OK. Thanks 3COM, you proprietary bastards... lets screw the customer on simple hardware upgrades, and while were at it, lets screw them some more on software and support... you should change your name to "3SCUM" - Mike ------------------------------------------------ Rock Island Communications, Inc. (360)-378-5884 http://www.rockisland.com/ San Juan Islands, WA ------------------------------------------------ - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.
The memory chip I got is still wrong. The problem now is that the center notch is off by 3 or 4mm, however the voltage notch is OK.
Thanks 3COM, you proprietary bastards... lets screw the customer on simple hardware upgrades, and while were at it, lets screw them some more on software and support... you should change your name to "3SCUM"
The 2 notches in DIMMs are for voltage, and for buffering. The one on the far end is a 3 position key. RFU(??), buffered, or unbuffered. The middle key is the voltage. It is either 5v or 3.3v. Perhaps you got the wrong voltage DIMM? ------------------------------------------------------------------------- | Curtis V. Shambeau | curt.shambeau@corecomm.com | Vice President | | CoreComm, LTD, formerly Voyager.net and ExecPC - Wisconsin Office | | "Those who can't laugh at themselves leave the job to others" | ------------------------------------------------------------------------- - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.
At 11:35 AM 5/30/01 -0500, you wrote:
The memory chip I got is still wrong. The problem now is that the center notch is off by 3 or 4mm, however the voltage notch is OK.
The 2 notches in DIMMs are for voltage, and for buffering.
The one on the far end is a 3 position key. RFU(??), buffered, or unbuffered. The middle key is the voltage. It is either 5v or 3.3v. Perhaps you got the wrong voltage DIMM?
Further research reveals it is MAC memory, ie; DIMM's used in several of their server lines. We took the original unit out of the ARC (which had an IBM part number on it) and cross referenced it, came up with the MAC compatibly listing. So I guess if the middle key is the voltage notch, then it is 3.3v since standard 168pin memory had the notch in the same position, it was the notch on the end (10 pins over from the edge) that was off from the original chip in the ARC... So we are going to order up the MAC compatible chip and see if it works... - Mike ------------------------------------------------ Rock Island Communications, Inc. (360)-378-5884 http://www.rockisland.com/ San Juan Islands, WA ------------------------------------------------ - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.
As DIMMs for computers are typically unbuffered, my guess is that 3COM used a buffered 3.3v DIMM then. Still able to get via normal memory channels I would think. Good luck! ------------------------------------
The memory chip I got is still wrong. The problem now is that the center notch is off by 3 or 4mm, however the voltage notch is OK.
The 2 notches in DIMMs are for voltage, and for buffering.
The one on the far end is a 3 position key. RFU(??), buffered, or unbuffered. The middle key is the voltage. It is either 5v or 3.3v. Perhaps you got the wrong voltage DIMM?
Further research reveals it is MAC memory, ie; DIMM's used in several of their server lines. We took the original unit out of the ARC (which had an IBM part number on it) and cross referenced it, came up with the MAC compatibly listing.
So I guess if the middle key is the voltage notch, then it is 3.3v since standard 168pin memory had the notch in the same position, it was the notch on the end (10 pins over from the edge) that was off from the original chip in the ARC...
So we are going to order up the MAC compatible chip and see if it works...
- Mike
------------------------------------------------ Rock Island Communications, Inc. (360)-378-5884 http://www.rockisland.com/ San Juan Islands, WA ------------------------------------------------
- To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.
------------------------------------------------------------------------- | Curtis V. Shambeau | curt.shambeau@corecomm.com | Vice President | | CoreComm, LTD, formerly Voyager.net and ExecPC - Wisconsin Office | | "Those who can't laugh at themselves leave the job to others" | ------------------------------------------------------------------------- - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.
On Wed, 30 May 2001, Mike Greene wrote:
At 11:35 AM 5/30/01 -0500, you wrote:
The memory chip I got is still wrong. The problem now is that the center notch is off by 3 or 4mm, however the voltage notch is OK.
The 2 notches in DIMMs are for voltage, and for buffering.
The one on the far end is a 3 position key. RFU(??), buffered, or unbuffered. The middle key is the voltage. It is either 5v or 3.3v. Perhaps you got the wrong voltage DIMM?
Further research reveals it is MAC memory, ie; DIMM's used in several of their server lines. We took the original unit out of the ARC (which had an IBM part number on it) and cross referenced it, came up with the MAC compatibly listing.
That actually makes sense, since the ARC is a PowerPC 603e... So, not proprietary, just obscure. :) (Apple on the other hand uses standard PC100 and PC133 dimms now, I have some acme generic PC100's in my G4...) Mike Andrews * mandrews@dcr.net * mandrews@bit0.com * http://www.bit0.com VP, sysadmin, & network guy, Digital Crescent Inc, Frankfort KY Internet access for Frankfort, Lexington, Louisville and surrounding counties www.fark.com: If it's not news, it's Fark. (Or something like that.) - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.
At 05:00 PM 5/30/01 -0400, you wrote:
Further research reveals it is MAC memory, ie; DIMM's used in several of their server lines. We took the original unit out of the ARC (which had an IBM part number on it) and cross referenced it, came up with the MAC compatibly listing.
That actually makes sense, since the ARC is a PowerPC 603e...
So, not proprietary, just obscure. :)
I guess we could consider a lot of what 3COM does "obscure" in many facets of their operation...
(Apple on the other hand uses standard PC100 and PC133 dimms now, I have some acme generic PC100's in my G4...)
Heh heh, yeah, I commented to my purchasing agent about the PowerPC chip, then we both looked at each other and said, "hmmm, I wonder about those proformas?" but alas, they only had 64MB in them as well, :-) We had replaced them with a couple of G3's and it was nice to see them take a PC100/133 chip. - Mike ------------------------------------------------ Rock Island Communications, Inc. (360)-378-5884 http://www.rockisland.com/ San Juan Islands, WA ------------------------------------------------ - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.
participants (3)
-
Curt Shambeau -
Mike Andrews -
Mike Greene