[GTALUG] war story #2: buying RAM

[D. Hugh Redelmeier]

| From: D. Hugh Redelmeier via talk <talk at gtalug.org>

| So this is what I bought for $159.99:
| <https://www.canadacomputers.com/product_info.php?cPath=24_311_1326&item_id=195989>

Surprise:  The ThinkCentre M75s gen 2 SFF seems this RAM as DDR-2400!  

Why???

Even though it is advertised as DDR-3200, when you read the 
specifications, it will only run at 3200 under XMP.

<https://www.kingston.com/datasheets/KF432C16BBK2_64.pdf>

    FACTORY TIMING PARAMETERS
    • Default (JEDEC): DDR4-2400 CL17-17-17 @ 1.2V
    • XMP Profile #1: DDR4-3200 CL16-20-20 @ 1.35V
    • XMP Profile #2: DDR4-3000 CL16-19-19 @ 1.35V

XMP is an Intel "standard" and cannot be used by AMD systems (like the
M75s).

There are hacks for AMD.  For example Asus' DOCP.  But a business
computer line like the ThinkCentre is unlikely to use that.

Now I have to return a second set of RAM.  Canada Computer might not
be as accomodating as Amazon.

I wonder how one searcsh for "DDR-3200 RAM, no REALLY DDR-3200 RAM".