topic Re: i7-7820x DDR4 compatibility in Mobile and Desktop Processors

i7-7820x DDR4 compatibility

JLaut — Sat, 24 Mar 2018 17:18:03 GMT

I'm building a system using the Intel i7-7820x processor on an ASRock x299 Taichi Motherboard. The only spec I can find on the processor seems to indicate that it will only handle 4 X DDR4 modules of up to 8GB each. I was planning to load two modules of 16GB each and need to know if this will work or not. The spec doesn't seem real clear on this. Thanks.

Re: i7-7820x DDR4 compatibility

AW4 — Sat, 24 Mar 2018 21:13:52 GMT

Where did you find that this cpu can only handle 4 memory modules of 8GB each?

The motherboard (and cpu) can handle 8 memory modules of 16GB each for a total of 128GB.

https://ark.intel.com/products/123767/Intel-Core-i7-7820X-X-series-Processor-11M-Cache-up-to-4_30-GHz Intel® Core™ i7-7820X X-series Processor (11M Cache, up to 4.30 GHz) Product Specifications

Max Memory Size (dependent on memory type)128 GB
Memory TypesDDR4-2666
Max # of Memory Channels4

https://www.asrock.com/mb/Intel/X299%20Taichi/index.asp# Specification ASRock > X299 Taichi

- 8 x DDR4 DIMM Slots

Max. capacity of system memory: 128GB

Re: i7-7820x DDR4 compatibility

JLaut — Sun, 25 Mar 2018 18:42:46 GMT

Bubba, Thanks for the quick response. On Intel's website the i7-7820x is not listed under the 8th generation processors, so I clicked on the "x-series" and found it listed there. Oddly, when I downloaded the datasheet it was labeled "6th-gen-x-series-processors". On page 7 is states "It features and Integrated Memory Controller (IMC) that supports 4 channels of DDR4 memory". I assumed incorrectly that the term "channels" referred to the actual DIMM slots on the motherboard - which I believe now is actually speaking of "quad channel memory". However, on page 9, it states, "supports 4 DDR channels" and "4GB and 8GB DDR4 DRAM technologies supported for these devices: UDIMM x8".

I know my motherboard specs and I bought the 7820x processor with the understanding that it would support the G. Skill 32GB (2 x 16GB) DDR4 2400MHz I bought - planning to add more in the future as needed for audio production work. But the statement on page 9 about the GB supported threw me and I still don't understand it. I just want to know that the processor will support the 16GB DDR4 memory in each DIMM slot. Thanks for helping clarify this.

Re: i7-7820x DDR4 compatibility

idata — Mon, 26 Mar 2018 19:50:20 GMT

Hello, everyone!

BubbaB: Thank you very much for that information. That is actually correct!

Lado: Thank you very much for contacting the Intel® Communities Team. Just to 7th Generation processor. Please find the https://www.intel.com/content/www/us/en/processors/core/7th-gen-core-family-desktop-s-processor-lines-datasheet-vol-1.html 7th Generation Datasheet, page 21, 2.1.1.2 section, the processor will support 16GB on each DIMM. Bear in mind that this specific processor will support DDR4-2666 and I recommend you to have the XMP option activated on your Motherboard's BIOS.

Antony S.

Re: i7-7820x DDR4 compatibility

JLaut — Mon, 26 Mar 2018 21:01:03 GMT

Anthony,

Perhaps you didn't read my original message. The processor in question is not 7th gen. It is 8th (i7-7820x). Please address my issue with this particular processor.

Thank you. Lado

Re: i7-7820x DDR4 compatibility

idata — Mon, 26 Mar 2018 22:28:43 GMT

Thank you very much for your prompt reply, Lado.

Allow me to share with you that the https://ark.intel.com/products/123767/Intel-Core-i7-7820X-X-series-Processor-11M-Cache-up-to-4_30-GHz Intel® Core™ i7-7820 belongs to the https://ark.intel.com/products/codename/37572/Skylake Skylake family which is the code name for the 7th Generation processors. Please find the Coffe Lake (8th Generation) processors in the following link: https://ark.intel.com/products/codename/97787/Coffee-Lake https://ark.intel.com/products/codename/97787/Coffee-Lake

Antony S.