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por este dispositivo também tem outras instruções :
Facilidade de uso
Inspiron
Inspiron
Video
14R-5420/7420/
15R-5520/7520/
M421R-5425
M521R-5525
Video memory
Integrated
Shared
Shared
Discrete
1 GB (Inspiron 14R-5420,
1 GB (Inspiron 15R-5520,
Inspiron M421R-5425)
Inspiron M521R-5525)
2 GB (Inspiron 14R-7420)
2 GB (Inspiron 15R-7520)
Inspiron
Inspiron
Ports and
14R-5420/7420/
15R-5520/7520/
Connectors
M421R-5425
M521R-5525
Audio
one microphone-in port
one microphone-in port
one stereo headphone/
one stereo headphone/
microphone combo port
speaker port
one digital microphone
one digital microphone
Mini-Card
one half-size Mini-Card
one half-size Mini-Card
slot
slot
one full-size Mini-Card
one full-size Mini-Card
slot (optional)
slot (optional)
(Inspiron 14R-5420/7420)
HDMI
one 19-pin port
one 19-pin port
Network adapter
one RJ45 port
one RJ45 port
USB
three 9-pin USB
three 9-pin USB
3.0-compliant ports
3.0-compliant ports
one 9-pin USB
one 9-pin USB
3.0-compliant port with
3.0-compliant port
PowerShare and Windows with PowerShare and
debugging
Windows debugging
Media Card Reader
one 8-in-1 slot
one 8-in-1 slot
VGA
one 15-hole port
one 15-hole port
mSATA (optional)
one mSATA port that
one mSATA port that
supports up to 32 GB
supports up to 32
(Inspiron 14R-5420/7420)
GB (Inspiron 15R-
5520/7520)
...