Swagat, your experience on your mobo is consistent with my experience on an MSI B450 Tomahawk. In your case (using the SB950 chipset's SATA ports) and my case (using the B450 chipset's SATA ports), the Samsung 860 EVO experiences incompatibility (e.g., CRC errors, etc.). However, using the mobos' other (non-AMD) chips' SATA ports works satisfactorily. This has been reported many times on this forum. Caveat emptor!
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