VoyForums
[ Show ]
Support VoyForums
[ Shrink ]
VoyForums Announcement: Programming and providing support for this service has been a labor of love since 1997. We are one of the few services online who values our users' privacy, and have never sold your information. We have even fought hard to defend your privacy in legal cases; however, we've done it with almost no financial support -- paying out of pocket to continue providing the service. Due to the issues imposed on us by advertisers, we also stopped hosting most ads on the forums many years ago. We hope you appreciate our efforts.

Show your support by donating any amount. (Note: We are still technically a for-profit company, so your contribution is not tax-deductible.) PayPal Acct: Feedback:

Donate to VoyForums (PayPal):

[ Login ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1, [2], 3, 4, 5, 6, 7, 8 ]

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Date Posted: 18:28:29 02/22/02 Fri
Author: Chris
Subject: 128MB SIMMs - the (almost) final word

This will obviously be added to the CC FAQ (and updated as needed), but here's - mostly - the last word on 128MB SIMMs in a Mystic:

They work.

The SIMMs that Coast to Coast Memory stocks at $29 are 128MB, double-banked, 2K refresh, EDO modules. The two I was sent are composed of 16 (8 on each side) Hyundai chips marked GM71V6503CT5, and they're Coast to Coast part number SNED32U/128/G5V60.

They work fine in a Mystic, with the caveat that they're too tall to fit under the screw housing, so you have to insert the mobo with the module tilted in the socket and then press the module into place once it's past the screw housing.

These modules also work fine in a 605 and the first slot of a 63x-series board (including the 58x). With a 63x-series board, 196 MB total RAM is possible*, the most of any CC of any description (barring the use of something like a SIMM Expander). The height of these modules will cause them to interfere with the heatsink on a 605, so I can't recommend them for installation on an overclocked 605.

This module is recognised as 32MB in an LC III, so I suspect it won't be recognised as 128MB in a CCII or 550/520 either.

The SIMM that Jack lent me is a 128MB, 4K refresh, double-banked, EDO module. It is composed of 16 Samsung KM44V16100AS-6 chips, 8 on each side, and is the same physical size as the Coast to Coast module.

It functions identically to the Coast to Coast module with one exception: it causes the Chimes of Death when installed in an LC III.

Neither SIMM works in the second slot of a 63x-series board, probably because both are double-banked.

*To get 196MB RAM in a 63x-series board, use one of the above 128MB modules in the first slot and a single-banked 64MB module in the second. I used a 4K refresh, single-banked, 64MB FPM module in the second slot, and mixing an EDO SIMM with this FPM SIMM seemed to work OK.

I have yet to test the Coast to Coast SIMMs in the other 72-pin Takky boards (and my other 68K Macs), but expect updates as I get around to it.

With the perfect functionality of the Coast to Coast SIMMs in the 68040-based Macs I tested, I certainly recommend them over the nearly-three-times-as-expensive modules from SA Tech.

cl

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Replies:

Post a message:
This forum requires an account to post.
[ Create Account ]
[ Login ]
Forum timezone: GMT-8
VF Version: 3.00b, ConfDB:
Before posting please read our privacy policy.
VoyForums(tm) is a Free Service from Voyager Info-Systems.
Copyright © 1998-2019 Voyager Info-Systems. All Rights Reserved.