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Max Ram on an '09 Quad Core?

I just buy used warranted ram on ebay - there are a few sellers in the UK and states selling them for years with good feedback. Probably just registered ECC memory from old Nehalem server boxes from HP or Dell but I care not one jot - they work.
 
Whether OWC's RAM is registered or not, why in heck don't they specify😱 Seems pretty crappy to me😡

But, then again, I am biased.

Lou
 
s-hatland said:
well i may just have to take the plunge. if they don't work, i'll sell the OWC and go from there. thanks guys!
Click to expand...

not sure if it makes sense to test these modules. most prbably they won't work. on the german web-shop https://www.sona.de/408264 it says:

compatible with:
- Supermicro A1SAM-2750F, A1SAM-2550F, A1SRM-2758F, A1SRM-2558F, A1SA7-2750F
- ASRock C2750D4I, C2550D4I
- ASUS X79 Deluxe (minimim BIOS 0901)
- ASUS Rampage IV Black Edition (min. BIOS 0801)
- ASUS P9X79 Deluxe, P9X79 Pro, P9X79 LE, P9X79 sowie Sabertooth X79 (BIOS for all models minimum 4801)
WICHTIGER HINWEIS: Diese Speichermodule sind nicht in anderen als den oben aufgeführten Geräten verwendbar. Bitte bestellen Sie die Produkte nicht "zum Ausprobieren". Sie können auch den Speichermodul-Hersteller unter info@intelligentmemory.com kontaktieren, um die Kompatibilität zu Ihrem Board zu prüfen.

meaning:
important note: modules are compatible with the boards mentioned in this list. please do not order these modules for testing. you can contact us info@intelligentmemory.com and ask about the compatibility with your system.
 
flowrider said:
Whether OWC's RAM is registered or not, why in heck don't they specify😱 Seems pretty crappy to me😡

But, then again, I am biased.

Lou
Click to expand...

I agree it is really annoying that they don't. Especially as Apple do discuss it in the manuals/documentation.

They sold 8GB RDIMMs when those first came out and then later moved to 8GB UDIMMs when those were released if I recall right, which doesn't help at all. Otherwise I think they have always sold unbuffered over registered where available.
 
mikeboss said:
not sure if it makes sense to test these modules. most prbably they won't work. on the german web-shop https://www.sona.de/408264 it says:

snip

meaning:
important note: modules are compatible with the boards mentioned in this list. please do not order these modules for testing. you can contact us info@intelligentmemory.com and ask about the compatibility with your system.
Click to expand...

sorry, didn't mean these, meant the 16gb rdimms from DMS.
 
finally took the plunge and bought the registered dimms from DMS. works perfectly ok with the OWC ram, so it likely points to OWC ram being registered as well. part and manufacturer numbers are (obviously) different, but, despite what OWC claims on their website (needs to be matched from same manufacturer) it does not seem to be required.

just thought i'd share in case anyone in the future may go searching.
 
^^^^Glad it worked out for you. Some of OWC's policies, specifications, and writings are, IMO, very suspect.

Lou
 
is there a thermal difference with non-ecc UDIMM compared to registered ECC memory ? i run 4 registered ecc 8gb sticks with metal heatsinks on them and they run very hot when working a lot with memory (sample streaming, etc) and so the cpu fan in my 8 core 2009 mac ramps up fast from the default 1200 to 3000 rpm even when the cpus are not stressed much. I was thinking about swapping the memory to non ECC as i understand it works normally in mac pro 2009 and it does not have the ecc chip that makes the memory hot. is that correct?
 
it's not the ninth RAM chip which gets hot, it's the buffer chip on the DIMModule. I prefer ECC UDIMMs because they don't get hot, they're a tiny little bit faster than registered memory. if my system supports ECC I always will use ECC memory!
 
Max RAM on the single processor unit is 64GB (4x 16GB), but 48GB (3x 16GB) is most optimal as the Mac Pro performs on the triple-channel memory configuration. It is said that you get more bandwidth with 3 modules rather than 4.

24GB (3x 8GB) is usually the most cost effective.
 
mikeboss said:
it's not the ninth RAM chip which gets hot, it's the buffer chip on the DIMModule. I prefer ECC UDIMMs because they don't get hot, they're a tiny little bit faster than registered memory. if my system supports ECC I always will use ECC memory!
Click to expand...

Thanks mike, would you share which memory supplier you got the chips from?
they are 8gb udimm ecc right? I would like the quietest solution, so the less hot from memory chips, the better. I also assumed there's some additional electronics on the rdimms so they get hot....
 
resonate said:
Thanks mike, would you share which memory supplier you got the chips from?
they are 8gb udimm ecc right? I would like the quietest solution, so the less hot from memory chips, the better. I also assumed there's some additional electronics on the rdimms so they get hot....
Click to expand...

I usually buy memory from KINGSTON. this is the set I bought lately:

Kingston KVR1333D3E9SK3/24G
http://www.kingston.com/dataSheets/KVR1333D3E9SK3_24G.pdf
 
whyrichard said:
Hey,

I am thinking of finally maxing out the ram in my '09 quad core. Crucial says it maxes at 12gb, is this really the case? Is there anyway to max it out with more?

Is there a better performance upgrade (besides hd's) for my '09 Quad?

Thanks!
r.
Click to expand...

16GB is the Apple-Supported Maximum RAM capacity. 48GB is the maximum that the machine itself will support and recognize.
 
Yebubbleman said:
48GB is the maximum that the machine itself will support and recognize.
Click to expand...

I think that you are confusing or combining the term support with recognize.

The Xeon W35xx will recognize 54GB RAM in a single socket Mac Pro 4,1.

The Xeon X56xx will recognize 64GB RAM in a single socket Mac Pro 4,1.
 
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