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| 64MB SIMMS in LC 550? | |
| Posted by: LazarusNine on 2015-10-05 14:35:18 Just curious whether or not 64MB SIMMS are recognised on the 550 logic board or if 36MB (4 + 32) truly is the limit. Thanks! | |
| Posted by: 360alaska on 2015-10-05 15:26:28 If I'm not mistaken a 550 is basically an LCIII right? And it's max ram is 36mb so... | |
| Posted by: MJ313 on 2015-10-05 16:11:20 I am kind of think Charles said that a single sided 64MB SIMM might work in an LCIII... but maybe I dreamt that. Maybe he'll chime in. I know I tried a double sided one in mine and it failed. | |
| Posted by: uniserver on 2015-10-05 19:24:52 yea i think it was trag... Trag was also the same guy that got 260 megs of ram to work in a quadra 605 if i remember correctly. and then a little later on i repeated it in some thread. but i don't think i was ever able to come across a single sided 64 mb simm. | |
| Posted by: LazarusNine on 2015-10-05 23:23:18 Thanks for the feedback! I'll likely stick with the 32MB SIMM in that case. If I've ever got a 64MB chip lying around, I'll test it and post my results. 🙂 | |
| Posted by: uniserver on 2015-10-05 23:29:48 i'v tried double sided 64 meg simms to no avail… i tried 3 different 64 megs simms, no dice… but they worked great in the 475/605 so that is where they went. | |
| Posted by: LazarusNine on 2015-10-05 23:57:11 Thanks, uni. I could always get a 64MB SIMM and drop it in one of the 475s and repurpose the 32MB chip for the 550. | |
Posted by: trag on 2015-10-06 01:44:42yea i think it was trag... Trag was also the same guy that got 260 megs of ram to work in a quadra 605 if i remember correctly.I never tested memory in a 550; don't have one. 260 MB in the 605/475 was with a 72 pin SIMM doubler and there was no closing the lid. A single 128 MB SIMM is more practical. Single sided doesn't mean anything with 64 MB SIMMs except in as much as it might correlate with non-composite and/or single vs. double banked. You pretty much always want non-composite though some old composite SIMMs will work (in some machines) and almost all 64 MB SIMMs are single bank -- all RAS wires/signals common amongst the chips on the SIMM. | |
Posted by: LazarusNine on 2015-10-06 13:26:27I never tested memory in a 550; don't have one.Trag, out of curiosity, is there a specific type of 72-pin 128MB SIMM that seems to work better than others in the 475? | |
| Posted by: uniserver on 2015-10-06 14:24:27 http://www.ebay.com/itm/128MB-FPM-MEMORY-NON-PARITY-60NS-SIMM-72-PIN-5V-32X32-/230649540963?hash=item35b3c8b163 I really like buying my ram from these guys. right now i have 2 of these in my OC'd 6100, 256 megs of ram... sickness... 🙂 | |
| Posted by: beachycove on 2015-10-06 14:51:11 I have some 64mb ram that will work in an LC575 (and Q605) but not in a 550. Draw your own conclusions! | |
| Posted by: uniserver on 2015-10-06 14:56:39 you have 128 megs of ram in your LC575... if so ... COOL! oh never mind, its got 2 simm slots for vram, not ram. and.. if i am not mistaken... 128 megs of ram does not work in the LC575. | |
Posted by: MJ313 on 2015-10-06 14:56:52right now i have 2 of these in my OC'd 6100, 256 megs of ram... sickness... 🙂Could you drop 4 of those in a 650? Or is that where you would also need to add the ROM slot and use a dougg3 rom, bbraun style? | |
| Posted by: uniserver on 2015-10-06 14:59:53 yes you can,, 🙂 and yes you would need Doug's rom simm and Rob's 650/610/800 rom hack 🙂 | |
Posted by: uniserver on 2015-10-06 15:00:37 | |
| Posted by: techknight on 2015-10-06 15:10:41 Wow talk about memory leakage. lol. | |
| Posted by: LazarusNine on 2015-10-06 20:27:00 Impressive stuff there, uni! Thanks for the link to the 128MB SIMM. I may need to find an alternative, though, as their shipping costs (~£25) are a bit steep for me, given that I would need - at most - one or two chips. In any case, I found this, but can't tell if it's double-height. In which case would it fit in the LC475? http://www.ebay.co.uk/ulk/itm/161053502879 | |
| Posted by: flecom on 2015-10-06 21:04:37 I tried putting a several different 64MB SIMM in my LC III, some gave me a sad mac, others would just show up as 32MB (so 36MB total)... I was contemplating getting some different 128MB SIMMs and seeing if any of those could get at least recognized as 1 64MB (so 68MB total)... they are cheap enough on ebay, worst case I'm out $20 I guess | |
| Posted by: rsolberg on 2015-10-07 00:23:41 The LC 575 can accept a 128MB double banked 2k refresh SIMM for a total of 132MB. See: http://colourclassicfaq.com/mobo/mystic.shtml | |
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