Check the listing for details. AltairTech.io Xilinx Control board for S19/S19 Pro/S19j/S19j Pro/S19 XP/L7/D7. Condition: New. Listed at 159.99 USD. AltairTech.ioOUR STORESELLER PROFILEFEEDBACKSAVE THIS SELLERCONTACTBitmain Antminer S19 Control Board Brand new Bitmain Antminer S19 Control Board.Model # Ctrl_C87 (Xilinx 7007 Zynq )Compatible with Antminer S19, S19 Pro, T19, S19j, S19j Pro, S19j Pro+ S19a Pro, S19 XP L7 & D7 and many other models.Purchased directly from Bitmain and comes in original packaging.Ships within 24 hours of payment.Note: This control boards comes with S19 Firmware pre-installed on it. Other Antminer models need to flash the model specific firmware on the board, to make it work. Firmware are available for download from Bitmain's website. 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.