Max Ram on an '09 Quad Core?

[mikeboss]

^^^^I did some checking. It's strange that OWC remains mute on the subject????

But, looking at these two sites:

http://www.memoryc.com/computermemo...333mhz-ecc-memory-mac-pro-8core-quadcore.html

http://www.memoryc.com/computermemo...333mhz-ecc-memory-mac-pro-8core-quadcore.html

I would say that OWCs RAM is not registered.

I am pretty sure that all 16 GB DIMMs are registered.

 

[Umbongo]

I am pretty sure that all 16 GB DIMMs are registered.

Only people to do 16GB UDIMMS are http://www.intelligentmemory.com/ as far as I know.

 

[mikeboss]

Only people to do 16GB UDIMMS are http://www.intelligentmemory.com/ as far as I know.

wow, nice find! I didn't know these existed... but they're somewhat expensive at approx. USD 400 per 16GB module

 

[Gav Mack]

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.

 

[s-hatland]

I am pretty sure that all 16 GB DIMMs are registered.

Only people to do 16GB UDIMMS are http://www.intelligentmemory.com/ as far as I know.

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!

 

[flowrider]

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

 

[mikeboss]

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!

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.

 

[Umbongo]

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

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.

 

[Gav Mack]

wow, nice find! I didn't know these existed... but they're somewhat expensive at approx. USD 400 per 16GB module

That's insane - You can buy 3 pulls of registered 16gb with a years warranty here in the UK for 540 bucks and I'm sure it's cheaper over the pond

http://pages.ebay.com/link/?nav=item.view&alt=web&id=141283983550

 

[s-hatland]

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.

sorry, didn't mean these, meant the 16gb rdimms from DMS.

 

[s-hatland]

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.

 

[flowrider]

^^^^Glad it worked out for you. Some of OWC's policies, specifications, and writings are, IMO, very suspect.

Lou

 

[resonate]

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?

 

[mikeboss]

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!

 

[iBuildMacs]

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.

 

[resonate]

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!

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....

 

[EdDuPlessis]

^^^^WOW, I bow to you my friend I thought I was the oldest guy here

Lou

Holy crap you guys made me feel young, thanks.

 

[mikeboss]

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....

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

Kingston KVR1333D3E9SK3/24G
http://www.kingston.com/dataSheets/KVR1333D3E9SK3_24G.pdf

 

[Yebubbleman]

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.

16GB is the Apple-Supported Maximum RAM capacity. 48GB is the maximum that the machine itself will support and recognize.

 

[mikeboss]

16GB is the Apple-Supported Maximum RAM capacity. 48GB is the maximum that the machine itself will support and recognize.

with an intel Xeon X56xx installed it is possible to run up to 64GB (4x 16GB DIMMs).

 

[h9826790]

Even though the W36xx can support up to 56G (16x3 + 8), it's more than 48G

 

[brand]

48GB is the maximum that the machine itself will support and recognize.

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.