will my case fit motherboard

Stiffy2025

Prominent
Feb 28, 2017
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so I have purchased a new case the Corsair Carbide Spec-01 and it comes with a bunch of cords like power sw, reset sw, H.D.D LED, Power led+, Power LED -, and so on. So I was wondering my motherboard was pulled from a Dell Inspiron 660s and it doesn't have labels. I have checked the manual and it doesn't say anything. I have a 11 pin connector or 12 pin - 1. is there a way I can figure out?