Z620 memory upgrade paths and Hynix product code question

[hybrid3]

Hello,

I´m a very happy user of a Z620 with E5-2667v2 CPU & 4x8GB Hynix RAM & 2x500GB SSD & GTX1070. Whisper quiet & very reliable machine. 

However, I need another 32GB so I started to look around for additional RAM modules.

First, I assumed that I should be using the same brand & type. My current sticks are Hynix HMT31GR7CFR4C-PB T8 AD.

The first part of the name makes sense as Hynix has published a "product code encoder". However, the "T8 AD" part is confusing me and so far, I´ve only been able to find HMT31GR7CFR4C-PB T3 AE or other similar variants, not T8 AD.

Would they still be compatible ? What do those last 4 letters actually mean?

BR

[Brian1965 · Accepted solution]

Hi hybrid3,

Providing the memory modules are from the same generic family, e.g. HMT31GR7CFR4C-PB, they will be compatible with your current memory modules.

A quick google search brought up the following links;

Product datasheet on the Hynix website.

Hynix memory modules - naming convention, also on the Hynix website. This explains the 'extra' characters listed on the modules.

P.S. Go to the 'Product Document' section, near the bottom of the page on the above link, and click on the Label Info. DDR3 tab to display a diagram and legend.

[hybrid3]

Thank you for the response! I did check the product specification and the naming convention before posting but I couldn´t find any information about the "T8 AD" part there, only the "PB" designation.

However, I missed the label information tab which did contain an explanation of the the last 4 characters. Thanks!

[SDH]

The Z620 v2 can support memory up to 1866 MHz assuming the processor can too.

HERE is the Intel "ark" site info for your processor:

https://ark.intel.com/products/75273/Intel-Xeon-Processor-E5-2667-v2-25M-Cache-3_30-GHz

Note in that page that the prpcessor can support "DDR3 800/1066/1333/1600/1866", and that would be ECC registered (buffered) memory.

The memory you are using is a bit slower than the top possible (1600 vs 1866 MHz), and I just don't know if that would be noticable.   I doubt it.   I'm building up a Z620 v1 to Z620 V2 via a "virgin" new v2 motherboard and only need 8 x 4GB total RAM installed.  Careful shopping via eBay is finding me that used for $15.00 USD/stick (note that is for 4GB sticks, and the reality is that for larger sticks such as the 8GB sticks you are using the cost/GB generally goes up.