1866 Mhz ECC Ram?

[DJ Meyer]

Has anyone found any 1866 Mhz ECC DDR3 modules? Preparing for Ivy-EP. 16 or even 32 GB dimms.

 

[Eric Z]

I'm also looking for 1866MHz ECC UDIMM RAM (or faster), in a 4 x8GB configuration.
Will work nicely with the Intel Xeon E3-1285 v3 (P4700 graphics). The built-in GPU is no slouch, but it requires as fastest RAM as possible to really shine.

I did manage to find this 1866MHz ECC RDIMM, though:
https://www.acmemicro.com/Product/1...stered-ECC-Dual-Rank-1-5V-Brand-Name-Original

EDIT:
Also found 1866MHz RDIMM ECC (Samsung):
http://www.memory4less.com/m4l_itemdetail.aspx?itemid=1471174488&partno=M393B2G70QH0-CMA

 

[DJ Meyer]

Went with these. 2x 16GB 1866Mhz Crucial ECC for $375

http://www.bhphotovideo.com/c/product/994161-REG/32GB_240-PIN_DDR3_RDIMM_PC3-14900_DRX4

 

[Tom Van]

In general, are there speed benefits to using 4x8GB sticks rather than 2x16GB? I'm looking to build one for the studio. Dr Kilgroe?

 

[DJ Meyer]

In general, are there speed benefits to using 4x8GB sticks rather than 2x16GB? I'm looking to build one for the studio. Dr Kilgroe?

On LGA 2011, its quad channel. So you want 4 (or 8) sticks per CPU. 2 per CPU works but you'll get half bandwidth.

 

[Tom Van]

On LGA 2011, its quad channel. So you want 4 (or 8) sticks per CPU. 2 per CPU works but you'll get half bandwidth.

So really, it's dependent on which MB I purchase, no?

 

[Jeff Kilgroe]

Doesn't matter on the motherboard really, they're all pretty much the same thing, a variation on Intel's reference designs. Besides the memory controller is built-in to the CPUs and it runs the same everywhere. All current LGA-2011 socket systems are quad-channel, as DJ points out. So, as he also pointed out, you want 4 modules for each CPU to maximize your memory speed. If you install 2 modules, you cut your maximum bandwidth in half.

If you're building a new Xeon system on the E5 V2 (Ivy Bridge) platform, then you'll definitely want the 1866MHz RDIMMs and 4 per CPU allowing *AT LEAST* 2GB per core, but I would recommend 4+ GB per core. If you're building a dual 12-core Xeon box for a total of 24 cores/ 48 threads, it really needs to have 256GB RAM. ...Unless you don't actually plan on using all that power under the hood. And before you jump up and say that you will use it, make sure your software actually can. Premiere CC tends to top out around 16~18 threads.

As for DJ's original post, the modules are trickling into the channel slowly, but they're out there. The CPUs only started shipping within the last 3 weeks. I just built a dual E5-2697 monster system and used 16GB Samsung modules. Seems like Apple is soaking up most of the Hynix production allocation for the upcoming Mac Pro. HP is gobbling up a huge portion of what Crucial/Micron are cranking out. So far, sales seem to be pretty flat on the new Xeon CPUs. :/