Answered: Can I use one CPU in a dual processor motherboard?
How to Upgrade a Processor (with Pictures) - wikiHow
What if you put 2 CPUs in a PC? - Quora
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How to connect multiple CPUs to a PC - Quora
ASRock > X670E Steel Legend
Used-Biostar M7VKQ Socket A motherboard with 1 ISA slot. Supports Athlon, Athlon XP Duron Processors. VT8361/ VT82C686B chipset. 200/266MHz FSB. 2 x 168-pin PC-133 SDRAM DIMM sockets. 1 x I - Walmart.com