Newegg offers the ASRock X370 Killer SLI/ac AM4 AMD Promontory X370 ATX Motherboard for $104.99 with free shipping via the steps below. That's the lowest price we could find by $74. It's compatible with A-Series and Ryzen Series processors and features two PCIe 3.0 x16 slots, six Serial ATA connectors, one M.2 socket, and support for memory up to 64GB. Deal ends August 31. To get this price:
  1. View the ASRock X370 Killer SLI/ac AM4 AMD Promontory X370 ATX Motherboard for $134.99
  2. apply coupon code "MPBTS17" and pay via Masterpass to drop that to $124.99
  3. redeem this $20 mail-in rebate for a final price of $104.99
Note: This coupon can only be used once per account.