On Fri, May 12, 2023 at 06:31:47PM -0400, D. Hugh Redelmeier via talk wrote:
| From: D. Hugh Redelmeier via talk <talk@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".
Good question. I think one needs to somehow find ram that is 3200 and 1.2V explicitly. The ones using XMP profiles seem to be 1.35V at that speed. This for example looks right: https://www.amazon.ca/Crucial-2x16GB-Desktop-Memory-CT2K16G4DFRA32A/dp/B07ZL... I guess you hit the same problem as this review: https://www.amazon.com/review/R17NJ5JNV9HE4D/ -- Len Sorensen