Dell Inspiron 660s (Early 2012) - Manual (Page 4)

Power ratings
Input voltage 100-127 VAC/200-240 VAC
Input frequency 50/60 Hz
Rated input current 6.0A/3.0A
Drives
Externally accessible one 5.25-inch drive bay for a Blu-ray Disc
combo (optional), Blu-ray Disc writer (optional),
or DVD+/-RW
Internally accessible one 3.5-inch drive bay for SATA hard drives
Expansion bus
PCI-Express x1:
Connectors one
Connector size 36 pin
PCI-Express x16:
Connectors one
Connector size 164 pin
PCI-E mini-card:
Connectors one
Connector size 52 pin
Media Card Reader
Card supported • Secure Digital (SD)
• Hi Speed SD (HSSD)
• Hi Capacity SD (SDHC)
• Memory Stick (MS)
• Memory Stick PRO (MS PRO)
• Multimedia Card (MMC)
• Multimedia Card Plus (MMC+)
• xD-Picture Card (XD)