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Rock Pi 4 Model C+ is more of a minus (less powerful than the Model C, but also cheaper) - Liliputing
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RK3399 RADXA ROCK Pi 4 Development Board Dedicated V1.6 Version M.2 Extended Version Steering Board - AliExpress
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Amazon.com: Rock Pi 4 Plus Rockchip RK3399(OP1) Single Board Computer LPDDR4 4GB with WiFi 5 and Bluetooth 5.0 Support Twister OS (4GB RAM+64GB eMMC) : Electronics
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RK3399 RADXA ROCK Pi 4 Development Board Dedicated V1.6 Version M.2 Extended Version Steering Board - Walmart.com
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Amazon.com: Rock Pi 4C RK3399 Single Board Computer LPDDR4 4GB Support Android 10.0 and Linux : Electronics
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