Need some help with my RAM.

wreckthisplace · Feb 19, 2013, 04:30 PM

Hey all,

I had 4x4GB of RAM in my computer totalling 16GB. I had to send back two 4GB RAM sticks (one was bad) to Corsair. I now have 2x4GB in my computer totalling 8GB of RAM.

I received the package with my new RAM in it today and for some reason Corsair sent me back one 16GB stick. I'm now not sure what to do. Is it ok to use 2x4GB and 1x16GB of RAM (totalling 24GB) or will that cause performance issues? Or is it best to just bite the bullet and go buy 2x4GB of RAM so in the end I will have 4x4GB of RAM bringing me back to where I started, but unfortunately costing me money.

Any help would be much appreciated.

Thanks!

DanielCoffey · Feb 20, 2013, 02:59 AM

You could ask Corsair to exchange that 1x16 for 2x8 and see if they are amenable. Have you unpackaged it yet? Was there any explanation of why they sent it to you?

throAU · Feb 20, 2013, 03:05 AM

Send it back and get the correct DIMMs.

Whilst you CAN install RAM in odd numbers of chips, you will get half the memory bandwidth, and I doubt your pro is certified for 16 GB dimms anyway. It may/may not work, but if it does performance will be less than it should be.

Tesselator · Feb 20, 2013, 03:35 AM

Please specify which MacPro model you have!

MacPro5,1 MacPro1,1 etc. - it makes a huge difference!

Giuly · 07:21 AM

Do as intended and buy the second 16GB stick?

The problem with this is that Kingston officially doesn't even have 16GB DIMMs for the Mac Pro, only regular 16GB 1333MHz ECC Reg.

xcodeSyn · Feb 20, 2013, 10:49 AM

Quote:

Originally Posted by wreckthisplace

I received the package with my new RAM in it today and for some reason Corsair sent me back one 16GB stick.

As already mentioned, the current 16GB memory modules on the market are all registered DIMMs (at least in the US) and I am not even aware that Corsair makes them since it is mainly selling non-ECC and unbuffered desktop/laptop memory. You cannot mix registered with unbuffered memory if your current memory is unbuffered.

GermanyChris · Feb 20, 2013, 12:43 PM

I would treat that as a sign to buy 2 more (triple channel with 16GB DIMM's makes my mouth water)

Feb 19, 2013, 04:30 PM	#1
wreckthisplace macrumors newbie Join Date: Jan 2006	Need some help with my RAM. Hey all, I had 4x4GB of RAM in my computer totalling 16GB. I had to send back two 4GB RAM sticks (one was bad) to Corsair. I now have 2x4GB in my computer totalling 8GB of RAM. I received the package with my new RAM in it today and for some reason Corsair sent me back one 16GB stick. I'm now not sure what to do. Is it ok to use 2x4GB and 1x16GB of RAM (totalling 24GB) or will that cause performance issues? Or is it best to just bite the bullet and go buy 2x4GB of RAM so in the end I will have 4x4GB of RAM bringing me back to where I started, but unfortunately costing me money. Any help would be much appreciated. Thanks!
	0

Feb 20, 2013, 02:59 AM	#2
DanielCoffey macrumors 6502a Join Date: Nov 2010 Location: Edinburgh, UK	You could ask Corsair to exchange that 1x16 for 2x8 and see if they are amenable. Have you unpackaged it yet? Was there any explanation of why they sent it to you? __________________ MacPro 5,1: 6 x 3.33 GHz / 12 GB RAM / AMD 7950 3Gb / 120Gb SSD, 240Gb SSD, 500Gb HDD / ACD 27" / APC SMT1000I iPhone 5: 32Gb White / O2 3G / TwigCase Bamboo / BodyGuardz Pure
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Feb 20, 2013, 03:05 AM	#3
throAU macrumors 68020 Join Date: Feb 2012 Location: Perth, Western Australia	Send it back and get the correct DIMMs. Whilst you CAN install RAM in odd numbers of chips, you will get half the memory bandwidth, and I doubt your pro is certified for 16 GB dimms anyway. It may/may not work, but if it does performance will be less than it should be. __________________ MBP (early 2011) - Core i7 2720 2.2ghz, Hires Glossy, 16GB, Seagate Momentus XT 750GB Mac Mini (mid 2007) - Core2 Duo 1.8, 2gb, 320gb 7200 rpm iPhone 4S, iPad 4
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Feb 20, 2013, 03:35 AM	#4
Tesselator macrumors 68040 Join Date: Jan 2008 Location: Japan	Please specify which MacPro model you have! MacPro5,1 MacPro1,1 etc. - it makes a huge difference! __________________ The Right <--> Left paradigm is an illusion which keeps the masses playing checkers while the elite play chess. -- Oh My...
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Feb 20, 2013, 07:12 AM	#5
Giuly macrumors 68030 Join Date: Oct 2009 Location: That depends whether you ask for timezone, state of mind or GPS coordinates.	Do as intended and buy the second 16GB stick? The problem with this is that Kingston officially doesn't even have 16GB DIMMs for the Mac Pro, only regular 16GB 1333MHz ECC Reg. Last edited by Giuly; Feb 20, 2013 at 07:21 AM.
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Feb 20, 2013, 12:43 PM	#7
GermanyChris macrumors 68040 Join Date: Jul 2011 Location: Here	I would treat that as a sign to buy 2 more (triple channel with 16GB DIMM's makes my mouth water) __________________ The Christian resolution to find the world ugly and bad has made the world ugly and bad--Nietzsche
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