ODROID-H2 RAM Compatibility List

We're testing in order to know which RAM modules work well on our ODROID-H2.

We have been checked 2 factors for that.
One is that whether it recognized or not and the other is that how transcoding performance with VAAPI H/W acceleration is fast.

The results give us a few noticeable big factors.

Transcoding rate means encoding speed. If the rate is 3.00, it encodes the video 3 times faster than the original play speed 1.
So, if the rate is 0.90, it will cause buffering when playing to prepare encoded screens.

It was around 15% faster when we configured dual channel memory than single channel.
Even if you have 24 GB memory configured with a 8GB RAM and 16 GB RAM, it is about 10 percent slower than dual 4GB RAMs.
So if you want to have faster VAAPI machine, you should install with 2 memories of the same capacity for the sake of dual channel.

And as you can see, VAAPI is getting faster with more RAM capacity.
Dual 16GB is about 5 percent faster than Dual 4GB on transcoding. This could too little but it still a factor.

But the other benchmarks that have nothing to do with GPU/VAAPI, there would not be noticeable performance improvements of dual channel.
For example, Wii emulation performance on dual channel configuration didn't show any noticeable performance difference against single channel.

We have noticed that high-speed RAM above DDR4-2400 is not recognized as it intended.
This because Gemini Lake SoC only supports DDR4-1600, DDR4-1866, DDR4-2133, DDR4-2400 SDRAM.
So it isn't needed to purchase/install higher than DDR4-2400.

* One forum user@DaleChatham reported Veteke Performance RAM 8GB DDR4 2400MHZ PC4-19200 CL17 260-PIN SODIMM is not compatible with H2 even with BIOS v1.03.
* HyperX HX426S15IB2K2/32 Impact DDR4 32GB. It booted fine. But it couldn't pass the memtest and caused a system instability. Reported by @fvolk
* HyperX HX426S15IB2K2/16 Impact DDR4 16GB. If you install two modules, it doesn't boot. Single module seems to work fine though. Reported by @Jowi
* Corsair CMSX16GX4M2A2666C18 DDR4 16GB. It doesn't boot even with a single channel configuration. Reported by @teraflop
* Crucial CT2K8G4SFS824A DDR4 8GB. It doesn't boot even with a single channel configuration. Reported by @crom1. But @powerful owl reported CT8G4SFS824A.M8FD modules worked fine with two H2 boards.
* Kingston KVR24S17S8/4 DDR4 4GB. It doesn't boot even with a single channel configuration. Reported by @reka20.
* Hynix 24S17S8/4 DDR4 4GB. It doesn't boot even with a single channel configuration. Reported by @reka20.
* Crucial CT8G4SFS824A.C8FBD1 DDR4 8GB. It doesn't boot even with a single channel configuration. Reported by @squitel.
* Crucial CT8G4SFRA266 DDR4 8GB. It didn't boot even with a single channel configuration. Reported by @abelop. But, more recently @uDude reported 2x8GB of Crucial CT8G4SFRA266.M16FG DDR4-2666 RAM worked well.
* TEAMGROUP TED432G2666C19DC DDR4 16GB. It doesn't boot even with a single channel configuration. Reported by @bastiffi. But another user @fromport reported it worked fine. A revised DRAM chipset might have a different characteristics probably :(
* Crucial CT16G4SFRA266.C8FE DDR4 16GB. It didn't boot even with a single channel configuration. Reported by @fromport.
* Goodram GR2400S464L17/16G DDR4 16GB. It didn't boot even with a single channel configuration. Reported by @pietrovich.
* Crucial CT16G4SFD824A.C16FDD1 DDR4 16GB. It works fine with a single channel configuration. But, it didn't boot with a dual channel configuration. Reported by Reported by @Lila-Kuh.



Faster than CL15 RAM didn't work stably until updating the BIOS to 1.03 or higher.
You have to update the BIOS first to override the speed.
Note that the recent production batch Rev-B has BIOS 1.05 and you don't need to update it.

According to the socket datasheet, the number of mating cycles is 25 only.
It seems to be a JEDEC standard. So do not install/uninstall your memory cards frequently.