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Resolved Mac Pro 2009 upgrade (4.1 to 5.1) - UDIMMs or RDIMMs RAM

polanskiman

polanskiman

macrumors regular
Original poster
Feb 12, 2010
181
47
Hello,

I'm in the process of upgrading my Mac Pro 2009 4.1 to 5.1 with new CPUs and whatnot. I am also intending to upgrade to faster RAM (1333 Mhz) but there is something I am not sure about. According to Apple specs, RAM for MAC Pro 2009 should be ECC UDIMM (unregistered). However when I look at the specs of the Mac Pro 2010 (5.1) Apple suggests that both UDIMMs and RDIMMs (registered) can be used in that model.

So my question is the following: can RDIMMs be used on a Mac Pro 2009 which has seen its firmware updated to 5.1 or am I stuck in using UDIMMs?

Thank you.
 
It's not officially supported by Apple (https://support.apple.com/en-us/HT205043#3). Yet, it is good to know it does work on the 2009 Mac Pro.
[doublepost=1458548497][/doublepost]I also have another question which I forgot to included in the OP. I see that some RAM manufacturers "feature utilisation of Apple qualified components including the inclusion of the Apple qualified Thermal Sensor EEPROM". Is this a pre-requisit when purchasing RAM or any compatible RAM brand will work?
 
I've had RAM without the thermal sensor installed in my Mac Pro 5,1 before and they worked. They just don't give any temperature information. That being said, I prefer RAM with the temperature sensor.
 
You can use either registered or unregistered 240 pin DDR3 ECC memory in either a Mac Pro 4,1 or 5,1 . You cannot mix both in the same System, though , as you already know .

Higher capacity modules are always registered . It starts at 4GB or 8GB .

There are PC Enterprise grade memory modules with Apple compatible thermal sensors that work perfectly fine in a cMP , even if not Apple approved .

Nehalem series Xeons have tri-channel optimized memory , which means your Mac will experience a performance boost when you install three matching memory modules per processor (even if there are four slots available.)

Your current processors are limited to a memory speed as high as 1066 MHz , although your Mac's upgraded boot ROM now can support as high as 1333 MHz . It is good you are considering a processor upgrade for numerous reasons .
 
Thanks Machines. I will soon receive two x5670 which will then need to be delidded first. Now I am looking into purchasing the RAM. I think I found a good deal on ebay for some Hynix 1333 Mhz DDR3 RAM - part number: HMT31GR7BFR4C-H9 (https://www.skhynix.com/eolproducts.view.do?pronm=DDR3+SDRAM&srnm=HMT31GR7BFR4C&rk=20&rc=module). Hopefully this should do it as the RAM has a temperature sensor with integrated SPD which complies with JEDEC TSE2002av as required by Apple's Specifications. The RAM is also RoHS compliant.
 
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polanskiman said:
Thanks Machines. I will soon receive two x5670 which will then need to be delidded first. Now I am looking into purchasing the RAM. I think I found a good deal on ebay for some Hynix 1333 Mhz DDR3 RAM - part number: HMT31GR7BFR4C-H9 (https://www.skhynix.com/eolproducts.view.do?pronm=DDR3+SDRAM&srnm=HMT31GR7BFR4C&rk=20&rc=module). Hopefully this should do it as the RAM has a temperature sensor with integrated SPD which complies with JEDEC TSE2002av as required by Apple's Specifications. The RAM is also RoHS compliant.
Click to expand...

I don't know how much they ask for, but this 4x8G is just $75 (new) and this is ECC RAM.
 
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Done with the RAM. I indulged myself with 6 modules of 8GB RAM (48GB total) for 120USD, shipping included. Some stores are selling them even cheaper but they can't guarantee which part number of RAM they will be sending. Sounds just crazy to me and the risk is too high.
 
polanskiman said:
It's a tad cheaper than that and free delivery from Hong Kong. :)
Click to expand...

Can you share the link here? New 4x8G 1333 EEC RAM for less than $75 from Hong Kong, I will buy a set to replace my current non ECC RAM.

I am at Hong Kong, if they send me the wrong parts, it's very easy for me to get exchange / refund.
 
h9826790 said:
Can you share the link here? New 4x8G 1333 EEC RAM for less than $75 from Hong Kong, I will buy a set to replace my current non ECC RAM.

I am at Hong Kong, if they send me the wrong parts, it's very easy for me to get exchange / refund.
Click to expand...

Sure, here you go: http://www.ebay.com/itm/361492244858?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT

Extract of our conversation:
"Dear friend
WE CAN NOT make sure whether you can get the item:HMT31GR7BFR4C-H9 [...]"

Delivery is free.
 
polanskiman said:
Sure, here you go: http://www.ebay.com/itm/361492244858?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT

Extract of our conversation:
"Dear friend
WE CAN NOT make sure whether you can get the item:HMT31GR7BFR4C-H9 [...]"

Delivery is free.
Click to expand...

Thanks for the link, it may be a good source for me.

What concern me a bit is "New Hynix 32GB 4X8GB DDR3 2RX4 PC3-10600R 1333MHz 240Pin ECC Registered Server"

I don't know the 2RX4 mean dual rank or quad rank, quad rank seems may cause issue on the cMP. That's what I want to avoid.
 
h9826790 said:
Thanks for the link, it may be a good source for me.

What concern me a bit is "New Hynix 32GB 4X8GB DDR3 2RX4 PC3-10600R 1333MHz 240Pin ECC Registered Server"

I don't know the 2RX4 mean dual rank or quad rank, quad rank seems may cause issue on the cMP. That's what I want to avoid.
Click to expand...

2Rx4 = Dual rank. That's the 2R at the begining.

A little more explanation here
 
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In case someone comes across this thread I just wanted to say that Hynix HMT31GR7BFR4C-H9 RAM works perfectly with the Mac Pro 4.1.
 
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