Check the listing for details. Bitmain Control board Xilinx CTRL_C87 + BraiinsOS firmware for Antminer S19. Condition: New. Listed at 134.99 USD. AltairTech.ioOUR STORESELLER PROFILEFEEDBACKSAVE THIS SELLERCONTACTBitmain Xilinx Control Board + BraiinsOS Brand new Bitmain Antminer Control Board, Model # Ctrl_C87 with Xilinx Zynq chipCompatible with Antminer S19, S19 Pro, T19, S19j, S19j Pro, S19j Pro+, S19a Pro, S19 XP, L7 and D7 Models.Purchased directly from Bitmain and comes in original packaging.Latest version of BraiinsOS+ firmware microSD card included with the control board.BraiinsOS+ is compatible with most Antminer S19 series miners.Just pop the SD card in to run BraiinsOS+, take it out to revert back to Bitmain Firmware. BraiinsOS+ autotuning firmware helps improve efficiency and unlocks additional tuning options to get optimal performance from your mining machines. If you're not sure about this control board's or BraiinsOS+ compatibility with your miner, send us a picture of your miner model name sticker and PSU sticker. We can check the compatibility for you. Disclaimer: Altair Technology LLC is referral partner for BraiinsOS and a portion of BraiinsOS dev fee may be be shared with Altair. Xilinx Control Board Installation Instructions:Pop the top cover on your S19 miner, to expose the control board.Disconnect the old control boardRemove the face plate on the miner, and slide out the old control board.Slide in the new xilinx control board and reinstall the face placeReconnect the 3x 18 pin signal cable, PSU power extension cable, voltage regulating cable, 4x fan cables to the new control boardFor running stock bitmain firmware, please install firmware specific to your S19 model using the SD card method (https://support.bitmain.com/hc/en-us/articles/4404919472281-S19j-S19j-Pro-control-board-program-recovery-SD-card-flashing-).For running BraiinsOS+, insert the BraiinsOS+ microSD card into the xilinx control board and reboot the miner. ShippingWill usually ship from St, Loius, MO on same business day if paid before 11:00 AM CST (excludes weekends and holidays). Expected ship time may vary and is based on seller's order cut-off time.International Shipping is available through the eBay Global Shipping Program, check out the 'Shipping and payments' tab above for more details. ReturnsReturns are subject to restocking fees of 15% of the purchase price and return shipping fees. For products that are eligible for return for replacement, the return shipping labels are free for returns for replacement of the same item within the applicable return policy period. Altair Technology LLC does NOT charge for restocking fees or return shipping labels for returns of defective products, or if you received the wrong product, the product did not match what was shown on the site, or if we made some other shipping error, provided the item is returned within its return policy period, and in accordance with the Return Policy. About UsAltair Technology owns and operates bitcoin mining facilities in St Charles, Missouri. We have deep expertise in both GPU and ASIC mining. We sell Bitmain, Whatsminer and other popular mining hardware and accessories. We are focused on serving the North American mining industry and aim to be a one-stop-shop for all popular mining hardware, parts and accessories. We hold our inventory in Missouri and our in-stock items typically reach US & Canadian customers in 2-3 business days. We also consult with mining farm operators and investors on design and maintenance of cryptocurrency mining farms.