Hi All,
I just upgraded to the Ryzen 1700X, with which I bought 16GB (4x4GB) DDR4 dimms rated at DDR-2400. On first boot the system wouldn't run at 2400, but instead rebooted several times until it finally came up (obviously detecting the ram) at DDR4-1833, forcing the RAM to run at DDR4-2400 caused the system to become unstable, even when manually setting the CAS/RAS/Precharge, etc... to their maximum values. The ram runs perfectly fine at DDR4-2133 however, but this is not what I bought nor what is plastered all over the ram, and the box.
So, I looked up the datasheet for the RAM IC itself:
HEREThe part is marked: H5AN4G6NMFR-TFC
The datasheet clearly states that parts graded with TF are only 2133 MHz parts.
Later I found out that these modules are JEDEC-2133 but XMP-2400 (Intel's Extreme Memory Profile), which is why they are selling them as DDR4-2400, this seems like it is common across the ram today. Anyway, so I figured I would get some faster RAM, knowing that it could have XMP profiles on the RAM and that is what it is being sold with.. so I purchased 16GBx2 DDR4-3200. I have not yet even installed it and figured I would save myself the trouble and inspect the ICs under the headspreader (which I am now convinced is not for heat, but to hide the ICs part).
The parts are: H5AN8G8NMFR-TFC
Obviously it's already suspicious.
HERE is its datasheet (which BTW hynx have removed from their website, google still has a cache of the URL).
Again, TF are 2133 MHz parts.
1) Am I missing something here?, or
2) Is this a major conspiracy in that we are all being sold overclocked RAM from factory?
I am going to now install this ram and see what happens, but it seems that manufacturers are lying about the performance of the ram by not stating its true rated speed, but it's overclocked (XMP) speed.
For the record the two different packs of ram are:
4x4GB = AVEXIR Platinum Series (AVD4u24001604G-4M)
2x8GB = G.Skill Ripjaws V (F4-3200C16D-16GVKB)