ark.intel.com lists the limit as 64GB for Haswell E processors. However instead of a hardware limit (the CPU can't address more than 64GB), it could be a validation limit (Intel couldn't test a 128GB config because suitable ram wasn't available at the time). I know I've seen the latter often on consumer components that would take larger DIMMs that came out after the laptop/pc was shipped; but never tried tracking back to see if the same limitation was in the specsheet.
Memory kits are not marketed to the CPU generation / codename, but the memory interface (i.e. DDR4) and speed.
The Haswell-E processors have a built-in memory controller (on the CPU die, not the X99 chipset) which supports up to quad-channels (256-bit width) access, but is limited to 64 GB. Most X99 motherboards have four or eight DDR4 DIMM slots. The 8 slots are usable as eight modules of 8GB for a total system RAM of 64 GB.
As far as I know, consumer series (Core i#, not Xeon) Skylake and Broadwell processors are similarly limited to 64GB of RAM and are equipped with a built-in dual channel DDR4 memory controller.
Haswell-E die is in fact server Haswell-EP aka Xeon E5 v3 die, so it does not seem to be the case, that the desktop-marketed Haswell-E is somehow specifically limited to 64 GB: http://www.pcworld.com/article/2938855/hardcore-ha... "i7-5820K CPU ... 128 GB RAM"
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Ken_g6 - Thursday, January 21, 2016 - link
Can LGA-2011-3 boards even use these? I thought I saw somewhere that Haswell-E CPUs were limited to 64GB.nathanddrews - Thursday, January 21, 2016 - link
I believe Haswell-E is limited to 64GB per CPU, so someone running a dual CPU setup could use this.DanNeely - Thursday, January 21, 2016 - link
ark.intel.com lists the limit as 64GB for Haswell E processors. However instead of a hardware limit (the CPU can't address more than 64GB), it could be a validation limit (Intel couldn't test a 128GB config because suitable ram wasn't available at the time). I know I've seen the latter often on consumer components that would take larger DIMMs that came out after the laptop/pc was shipped; but never tried tracking back to see if the same limitation was in the specsheet.yuhong - Thursday, January 21, 2016 - link
Yes the 8x16GB kits for Haswell-E has been out for a while now.mctylr - Friday, January 22, 2016 - link
Memory kits are not marketed to the CPU generation / codename, but the memory interface (i.e. DDR4) and speed.The Haswell-E processors have a built-in memory controller (on the CPU die, not the X99 chipset) which supports up to quad-channels (256-bit width) access, but is limited to 64 GB. Most X99 motherboards have four or eight DDR4 DIMM slots. The 8 slots are usable as eight modules of 8GB for a total system RAM of 64 GB.
As far as I know, consumer series (Core i#, not Xeon) Skylake and Broadwell processors are similarly limited to 64GB of RAM and are equipped with a built-in dual channel DDR4 memory controller.
extide - Friday, January 22, 2016 - link
No, it's a validation issue, not a real limit.Haswell E will support 128GB of UDIMM.
Skylake-S/K Support 64GB
TiGr1982 - Monday, January 25, 2016 - link
Haswell-E die is in fact server Haswell-EP aka Xeon E5 v3 die, so it does not seem to be the case, that the desktop-marketed Haswell-E is somehow specifically limited to 64 GB:http://www.pcworld.com/article/2938855/hardcore-ha...
"i7-5820K CPU ... 128 GB RAM"
zimanodenea - Friday, January 22, 2016 - link
I also remember a customer review someone had done on a 128GB kit saying they could only see 64GB.dsraa - Tuesday, January 26, 2016 - link
Good lord....and I thought 32GB was ridiculous......how much is this supposed to cost?????weareborg - Tuesday, February 2, 2016 - link
Can we please reduce the number of images which are chopping the article at random places. A horizontal-gallery would be nice.