MP 1,1-5,1 Mixing RAMs?

[high heaven]

I have 32gb of RAM but it's difficult to work with. I'm planning to buy more RAMs but I'm not able to find a same RAM from ebay. I wonder if I can just get any kind of 1333mhz ECC RAM for Mac Pro?

 

[flowrider]

Mac Pro Memory - 2012 12-Core 2.66GHz MD771LL/A CTO - DMS

DMS offers DDR3-1333 (PC3-10600) Memory for your 12-Core 2.66GHz 2012 Mac Pro MD771LL/A CTO. 100% Apple Compatible and backed by a Lifetime Warranty.

www.datamemorysystems.com

Lou

 

[h9826790]

There are 2 main specs you have to focus on.

1) You CANNOT mix UDIMM with RDIMM. So, let's say all your current RAM are UDIMM, you must buy UDIMM. If you mix UDIMM and RDIMM together, your cMP won't boot.

2) You should buy 2Rx4 (AKA dual Rank) memory, the cMP can work with other memory rank (e.g. 4Rx4), but that often cause other issues.

Apart from that, you can pretty much install whatever DDR3 you want onto the cMP.

You can mix ECC with non ECC, 1333MHz with 1066MHz, or 4GB DIMM with 8GB DIMM. The cMP will work just fine with all that.

 

[high heaven]

There are 2 main specs you have to focus on.

1) You CANNOT mix UDIMM with RDIMM. So, let's say all your current RAM are UDIMM, you must buy UDIMM. If you mix UDIMM and RDIMM together, your cMP won't boot.

2) You should buy 2Rx4 (AKA dual Rank) memory, the cMP can work with other memory rank (e.g. 4Rx4), but that often cause other issues.

Apart from that, you can pretty much install whatever DDR3 you want onto the cMP.

You can mix ECC with non ECC, 1333MHz with 1066MHz, or 4GB DIMM with 8GB DIMM. The cMP will work just fine with all that.

16GB KIT (2 X 8GB) PC3-10600 1333 MHZ ECC REGISTERED Apple Mac Pro Memory RAM | eBay

Mac Pro "Twelve Core" 2.66 (Server 2010) MacPro5,1 BTO/CTO A1289 32GB, 64GB 128GB 8. Mac Pro "Twelve Core" 2.93 (Server 2010) MacPro5,1 BTO/CTO A1289 32GB 128GB 8. Mac Pro "Twelve Core" 2.4 (Server 2012) MacPro5,1 BTO/CTO A1289 64GB 128GB 8.

www.ebay.com

This is mine and will that RAM work with this?

 

[Dayo]

You can mix ECC with non ECC, 1333MHz with 1066MHz, or 4GB DIMM with 8GB DIMM. The cMP will work just fine with all that.

But the cMP will work with the lower speed right?

 

[flowrider]

^^^^RAM speed in the cMP 5,1 is determined by:

1. The CPU

2. The rated speed of the slowest module installed.

Lou

 

[JedNZ]

I’m looking at two IBM ram sticks on a local auction site. I can’t tell if they’re U- or RDIMM. Can anyone confirm which one they are from the labels, and if they would work in my cMP (see

 

[h9826790]

But the cMP will work with the lower speed right?

In that case, all RAM will work at 1066MHz
[automerge]1590819385[/automerge]

16GB KIT (2 X 8GB) PC3-10600 1333 MHZ ECC REGISTERED Apple Mac Pro Memory RAM | eBay

Mac Pro "Twelve Core" 2.66 (Server 2010) MacPro5,1 BTO/CTO A1289 32GB, 64GB 128GB 8. Mac Pro "Twelve Core" 2.93 (Server 2010) MacPro5,1 BTO/CTO A1289 32GB 128GB 8. Mac Pro "Twelve Core" 2.4 (Server 2012) MacPro5,1 BTO/CTO A1289 64GB 128GB 8.

www.ebay.com

View attachment 919810
This is mine and will that RAM work with this?

Should work