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Originally Posted by Luftwaffel
So, I'm somewhat interested in one of these as part of my war against analog gauges, and I'm not new to in-car PCs or Android tablet builds, and actually I probably change the ROM on my phone every other week, so I kind of know what I'm probably getting into here, but I have some questions.
The screen resolution is shit. The RAM is shit. The processor is shit. It's running two major versions old Android. It's not just the Joying. All of these head units are borderline antiquated.
With that in mind, is the head unit reasonably quick at least? I just don't want hangs and glitches because the hardware can't hack it while running music, maps, and engine monitoring at the same time. I feel like multitasking these three at once is a basic requirement.
Second, is there any cable/software combination you guys know of that will read from OBD/CAN at a faster rate like OFT/Ecutek do? Basically looking for near realtime feedback.
Maybe I'm too demanding. 
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I don't do much on my radio, typically music from sdcard, podcast from phone over bluetooth, and navigation using Waze app. The only time I notice a hiccup is when I'm streaming bluetooth and I open Waze. As its initializing the audio chops a bit and once it's loaded it plays totally fine. If there's anything you want me to try out lmk.
For the price, you can't beat these units. Yea, the Android version is outdated..but it's a car radio. Would I spend $1000 on a radio with Android v4, no. I am completely happy with this unit and would buy it again.
I'm not sure about the OBD reading speeds. When I use Torque, I use bluetooth though I'd prefer to use USB but the USB/OBDII dongle I bought wouldn't get recognized by the unit/Torque. Look through the XDA thread and ask your question there. I don't think anyone on these boards has the kind of answer you're looking for.
If you have concerns with performance, look for a quad core version with 1024x800 res. My unit is dual core with 800x400 res.