S21H Android 4.1.2 HDMI TV Dongle Comes with 2GB RAM

Following the comments I’ve read, many ask for more RAM in their mini PCs, and one even tried to make his own with 2 GB RAM. So I’m glad to say that a Rockchip RK3066 based mini PC is now available with 2GB RAM, and is called S21H.

S21H HDMI TV Dongle

The rest of the specs are pretty standard and similar to MK809 II / MK802 IIIs:

  • SoC – Rockchip RK3066 dual-core Cortex-A9
  • System Memory – 2GB DDR3
  • Storage – 8GB Nand Flash, microSD slot (up to 16GB???)
  • Connectivity:
    • WiFi – 802.11b/g/n
    • Built-in Bluetooth
  • Video Output – HDMI
  • Video Codec – M-JPEG, MPEG-1, MPEG-2, MPEG-4, H.263, H.264, VC-1, DivX, Xvid, RealVideo, VP6, Sorenson Spark support
  • USB – 1x USB 2.0 Host, 1x microUSB OTG port.
  • Power Supply – 5V/2A

S21H comes with an HDMI cable, a USB cable, a power adapter, and a (probably useless) user manual.

I’ve found the device on Aliexpress for $70.10 (You can get $5 discount with “mainagame5” coupon), and aHappydeal for $66 where you may get 8% discount with “love2012” coupon.

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28 Comments
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pepe
pepe
11 years ago

Excellent, now quadcore and 100% linux compatibility 😉

onebir
onebir
11 years ago

The same store also has some similar models called S18C – it looks like the ‘set top box’ style one has 2gb RAM, two full size USB ports & ethernet:
http://www.aliexpress.com/store/group/Android-TV-Box/813658_212231257.html
There are some inconsistent descriptions there (eg how much RAM does the stick style S18C have?) so probably best to double check…

pepe
pepe
11 years ago

At the end i had bought a nexus 7 as tablet, but i am still waiting for a mini pc melee A1000 style that change my computer for a linux quadcore with at least 2Gb of RAM and sata drive to put 1 ssd.

Please that anybody hear me. I am the only one that want 1 Arm pc?

doc. Bormental
doc. Bormental
11 years ago

it have FAKE JB(4.1.*) as have ALL Rockchip based product (kernel 3.0.* from ICS instead 3.1.* -> no Butter & so on)

NineJa
NineJa
11 years ago

WTh, cool. Now just something box style with composite output and a good rom and no overheating. RPi looks so out of date in terms of spec but still so ahead in terms of longevity because of the community support.

Orlean
Orlean
11 years ago

I wonder how it works with XBMC on android.

Dmity
Dmity
11 years ago

pepe :
linux quadcore with at least 2Gb of RAM and sata drive to put 1 ssd.
Please that anybody hear me. I am the only one that want 1 Arm pc?

Sounds like ARMBRIX Zero / ArndaleBoard. Except dual core Exynos 5 (A15 at 1.7GHz) is faster than quad core Tegra 3 (A9 at 1.4 GHz): http://www.phoronix.com/scan.php?page=article&item=samsung_exynos5_dual&num=3
While Samsung Chromebook XE303C12 could also be used with external HDMI display, keybord, mice, USB to Ethernet adapter, ..

onebir
onebir
11 years ago

@NineJa
See the box-style S18C mentioned above. (No composite though…)

cnxsoft
11 years ago

@doc. Bormental
Jelly Bean is running on Linux kernel 3.0.31, at least it was the case at the time of the first release in June/July.

deadhp1
11 years ago

I wonder if this uses the Mediatek wifi or the RK903…. I’m not a big fan of either of those chipsets right now. The Mediatek has no leaked source code yet, and the RK903 has a max speed of 65mbps. The S21H looks very similar to the iMito MX1 with the Mediatek wifi. As you probably know, the iMito MX1 is based on the original UG802. That means no reset button, and 1.2GHz maximum speed(no heatsink!) Now that at least one quad core stick is out it should only be a matter of time before we see more. I’m hoping… Read more »

NineJa
NineJa
11 years ago

@onebir
Hey, thanks. Didn’t catch that stb version earlier. Yeah, no av output is a prob for me since I only have an old CRT tv.
How is this proc in terms of heat and not hanging? Will the double ram improve performance substantially over current 1gb models with the same perf?
The stick version design is pretty nice, probably the nicest I’ve seen coming from a china odm

onebir
onebir
11 years ago

@NineJa Good to see someone else who isn’t obsessed with having the latest TV 🙂 (I didn’t know what HDMI was until a few months ago! :p) Unfortunately, I don’t think (?) any of the Android dongles have composite output. Unless your tv happens to have DVI you’re stuck with a $30-40 HDMI-> composite converter. A small flatscreen TV might only be twice the price of one of those (esp secondhand?) I’m also curious to know if 2gb ram gives much performance boost. Android apps I’ve used don’t seem to use so much memory, so perhaps not so important unless… Read more »

eebrah
eebrah
11 years ago

Recently came across this http://www.pandawill.com/t004-mini-android-pc-android-tv-box-android-40-a13-4gb-hdmi-tf-card-p70777.html on pandawill.

It claims to be an Allwinner A13 based “TV dongle” with *1GB* RAM, *1080p @60Hz HDMI* output.

As far as I can tell, the Allwinner A13 cannot support > 512MB RAM, neither does it have HDMI out nor can it do over 800×600 resolution.

Can anyone more knowledgeable than me in this matters help me tell if they are for real?

DeepSpace
DeepSpace
11 years ago


65 Mbps raw wifi speed equals to about 3 MB/s transfer speeds and that isn’t enough for HD video streaming.
Using 150mbps raw wifi speed isn’t yet enough for highest bitrate HD video streaming.

Definitively, a 300mbps wifi is needed and:
a. No neighbours in the 2.4Ghz wifi range so you can use a 40Mhz channel (the 2.4Ghz band is 70Mhz wide and very populated)
b. A 5Ghz wifi router and dongle

onebir
onebir
11 years ago

@Gabe
@eebrah
I didn’t know about those. I’d assumed the SOCs would need extra circuitry to output composite video, but apparently not (much?). NineJa’s wish may be fulfilled 🙂

NineJa
NineJa
11 years ago

@onebir As long as we are talking about wishes 😉 Quad Core – 2GB – made by someone reputable like Genia – dual boot (linux/android) AND A/V out. Yay. But yeah, seriously, there seem to be some boxes available. I was thinking of the GeniaTech ATV1600 (MyGica/EnjoyTV) but just as I was about to reach a decision these dudes went and came out with a 2GB soc. The $89 Hardkernal ODroid U2 looks mighty fine too, until I start adding cost of adaptor cables wifi etc (and it doesnt have AV or a full case). I wish some Chinese manu… Read more »

onebir
onebir
11 years ago

@NineJa
I think the next-gen cubieboard will go straight to the quad-core A31. So (if I understand this correctly) that could it with just the addition of a resistor:
https://groups.google.com/forum/?fromgroups=#!topic/cubieboard/pjaTUU9BSXI
(Someone would have to tell me exactly what to do with the resistor though 🙂 )

Gabe
Gabe
11 years ago
jafa
jafa
11 years ago

it’s a fake – this device has 2G of ROM, 1G of RAM, and 4G of nand… so disappointing!!!!

jafa
jafa
11 years ago

it’s even worst: I just checked with android system info app:
CPU is arm v7 not v9 …

fpippo
fpippo
11 years ago

hi i have got one s21h. It works fine, not so strong wifi , but it works. I can see mkv full hd video streams from my nas all by wifiN from nas attached to wifi router to s21h in wifiN . It is as Jafa said: cnxsoft : @jafa ARM Cortex A5, A8, A9 and A15 are all using ARMv7 architecture so that part is fine. There is no actual “ROM” in today’s system, what you may have is a 4GB NAND flash with 2 GB reserved for the system, 2GB for storage, which is still not nice since… Read more »

Chris
Chris
10 years ago

I cant seem to find any support for the s1h is stuck on the bootscreen and i need the firmware please help@fpippo

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