Okay, quick update -
So in terms of RAM upgrades, I picked up a
Crucial 2x16GB SODIMM set from Newegg for ~125 over the 4th of July weekend and it arrived today. In addition, I also picked up a pair of
G.Skill Ripjaws DDR4 32GB SODIMMs for the Ryzen embedded V1756 powered HP t740 thin client - the SODIMM pair were roughly 240 USD each. The plan was to use the Ripjaws RAM on the t740, and if it didn't work, the Crucial can be used instead. Fortunately, the RAM worked and the t740 is now running with 64GB of RAM. I don't see why this would not work for the R1505 powered t640.
What about putting the Ripjaws 32GB SODIMM on the 5070? No such luck. The machine powers on and the amber LED
blinks a 2-5 error code repeatedly, which indicates invalid RAM...so it's very unlikely for the machine to break the 32GB barrier. Note that this error happens regardless of whether the 32GB SODIMM is mounted on slot 1, slot 2, by itself or in conjunction with another SODIMM unit. Once the machine sees the 32GB SODIMM it'll flash the invalid RAM error. The Crucial RAM pair did work on the 5070 so that machine now have 32GB of RAM.
Now keep in mind that the Lenovo ThinkCentre m725q gen2 (Ryzen 3/5 2xxxGE series) will start seeing an EOL induced price drop later in the quarter when the Ryzen 4000s shows up en-masse, and the fact that there are HP t640s on EvilBay US best-offers for about 200 USD. The t640s are like the Ryzen equivalent to the 5070s and should be able to take 32GB SODIMMs. One of the issues that I have with 5070 pricing is that you are paying higher prices because Dell-Wyse are still selling them as "current products", despite that they are a 2 year old design that was leapfrogged by HP in 2019 by their "4" series. If you can get the 5070 cheap, sure, go for it. But if you look at the
Project TinyMiniMicro thread...well, you can find more cost-effective deals.
The interesting thing is that Dell-Wyse has a 2-3 year product cadence with their thin clients - the 5060 came out in Q4 2016, while the 5070 came out in Q3 2018. The question is whether they are planning to roll a 5080 at the end of the year, or is it postponed. The question is whether they are sticking with Jasper Lake Atoms, or AMD...?
HP has a similar 3 year cadence with their products. The t620 plus was announced in Q4 2013, the t730 in Q4 2015, while the t740 in Q2 2019 (possibly due to AMD not fielding Ryzen embedded V1000 until Q1 2018).