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Mr. Zarniwoop

macrumors 6502a
Original poster
Jun 9, 2005
752
139
Apple only supported 4GB FB-DIMMs in these models, for a total of 32GB RAM.

However, the chipset was always suspected to support 64GB with 8GB FB-DIMMs, but everyone who tried this only had RAM recognized up to 32GB RAM.

But today there's an interesting post on netkas of someone who used mostly 8GB FB-DIMMs and left two 4GB FB-DIMMs in the last two spots of the second riser.

The apparent result? 56GB RAM in a MacPro2,1

Very interesting if it really works properly.
 

frostart

macrumors newbie
Oct 9, 2014
1
2
This my message on netcas.org. I established this memory three years ago. I established 56 Gb only because any more there was no such memory.:) It was necessary to put two modules on 4 Gb for bank filling. I tested memory in TechTools 7 - everything normally. Sorry for my English.:)
 

FireArse

macrumors 6502a
Oct 29, 2004
899
108
Apple only supported 4GB FB-DIMMs in these models, for a total of 32GB RAM.

However, the chipset was always suspected to support 64GB with 8GB FB-DIMMs, but everyone who tried this only had RAM recognized up to 32GB RAM.

But today there's an interesting post on netkas of someone who used mostly 8GB FB-DIMMs and left two 4GB FB-DIMMs in the last two spots of the second riser.

The apparent result? 56GB RAM in a MacPro2,1

Very interesting if it really works properly.

This is very interesting - sadly my RAM supplier of choice (Crucial) no longer supply the part. Where are you recommending we buy RAM in the UK?
 

profinite

macrumors member
May 1, 2009
99
15
2006 Mac Pro (MacPro1,1)
Flushed to 2,1 firmware
Two Xeon X5355’s [Purchased February 25, 2014 for $45]
Macosxbootloader v3.1
64GB RAM (8 x 8GB) [Purchased November 18, 2015 for $199]
OS_X_El_Capitan.jpg

64GB_RAM.jpg
 

nigelbb

macrumors 65816
Dec 22, 2012
1,090
221
This is very interesting - sadly my RAM supplier of choice (Crucial) no longer supply the part. Where are you recommending we buy RAM in the UK?
If you want 667MHz FB-DIMMs there are loads of cheap used parts on eBay pulled from Dell & HP servers. I have upgraded all three Mac Pro 3,1s in my household to 32GB & these parts will work in a 1,1 just fine. This is 32GB (8x4GB) from the US but they will ship to UK for about $50 all in (around £35) http://www.ebay.co.uk/itm/32GB-8x4G...973065?hash=item1ea3f83ac9:g:NikAAOSwcdBWTQGM
 
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