My buddy bought this kit as he plans to run everything stock:
Buy Crucial 16GB (2 x 8GB) 260-Pin DDR4 SO-DIMM DDR4 3200 (PC4 25600) Laptop Memory Model CT2K8G4SFS832A with fast shipping and top-rated customer service. Once you know, you Newegg!
www.newegg.com
That is super cheap ddr4-3200 but I like to play with my toys
That kit turned out to be "J-Die" and I have no idea what Micron J-Die is...
I understand this has been posted quite a bit ago, and some discussion on this has already happened, but as RAM is so important for iGPU performance, maybe this can help anyone still shopping around for fast RAM.
"J-Die" is just a different revision of the same basic Micron 8Gbit DRAM IC. Specsheet can be found here
https://www.micron.com/-/media/clie...ducts/data-sheet/dram/ddr4/8gb_ddr4_sdram.pdf
The revisions show slightly different characteristics. E.g. the first RAM kit I had was 2x 4GByte Micron DIMMs pulled from a Mac Mini, based on the 512M16 8Gbit device in Revision E with 2666 speed grade. Performed great, got it to 3200 CL14, but 8GB was too little RAM and held back by the x16 width which appears to be inherently slower than x8 wide ICs. I also had 2x8GB and 2x16GB Crucial Ballistix SportLT 2666 SO-DIMMs kits for testing. They were based on the 1G8 8Gbit device in Revision D. They did not like 1.35v and crapped out faster than at 1.2v, so not useful for overclocking.
I recently aquired a 32GB (2x16GB DualRank modules) kit of the Crucial 3200 series. This one:
https://www.crucial.com/usa/en/ct2k16g4sfd832a . However, mine is based on the Revision E 1G8 8Gbit device and manufacturing date was March 2019, not late 2018 as with your friend's kit. So my findings may or may not have any validity for the same kit based on Revision J ICs.
The kit performs great for me. It being dual rank I did not expect much in terms of headroom, but:
3200 CL18 @ 1.2V
3200 CL16 @ 1.35V
3400 CL18 @ 1.35V - Sloppily set timings and only tested to 100% in Memtest so far. Takes ages on 32GB
Single rank (the 8GB modules) would likely go even faster. The single rank modules naturally have a bit lower bandwidth than the dual rank modules, so it's probably fine to go for one or the other just depending on your desired RAM size. At the price I payed (~ €150) I think it's a steal for 32GB. If you go for single modules and not a kit, 2x16GB could even be had for around €135.
Apparently typical Micron issue is tRCD_RD does not like being low. Has to be 4 or so clocks higher than tCL. tRFC can also not go that much lower than auto-timing