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

Power ratings
Input voltage 115/230 VAC
Input frequency 50-60 Hz
Rated input current 7.0 A/4.0 A or 6.0 A/2.1 A
Drives
Externally accessible two 5.25-inch drive bays for a Blu-ray Disc
combo (optional), Blu-ray Disc writer (optional),
or DVD±RW
Internally accessible two 3.5-inch drive bays for SATA hard drives
Expansion Bus
PCI Express x1:
Connectors three
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)