motherboard for a intel core i7-980

Solution
Any LGA1366 Motherboard is compatible with it.
PCPartPicker part list: https://pcpartpicker.com/list/P8K8TW
Price breakdown by merchant: https://pcpartpicker.com/list/P8K8TW/by_merchant/

Motherboard: Asus - P6X58-E PRO ATX LGA1366 Motherboard ($252.00 @ Amazon)
Total: $252.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-12-31 01:44 EST-0500


Not sure how much you will pay for it. Socket 1366 is obsolete so mobo will be expensive and hard to find. If you want 6 cores with 12 threads, consider i7 8700K ($380) which needs Z370 mobo and DDR4 memory.