Filter
Top Products
CD-R
CD-RCD-R
CD-R
Up to 24X
CD-RW
CD-RWCD-RW
CD-RW
Up to 16X
Read speeds
Read speedsRead speeds
Read speeds
DVD-RAM
DVD-RAMDVD-RAM
DVD-RAM
Up to 5X
DVD-RW, DVD+RW
DVD-RW, DVD+RWDVD-RW, DVD+RW
DVD-RW, DVD+RW
Up to 8X
DVD-R DL, DVD+R DL
DVD-R DL, DVD+R DLDVD-R DL, DVD+R DL
DVD-R DL, DVD+R DL
Up to 6X
DVD+R, DVD-R
DVD+R, DVD-RDVD+R, DVD-R
DVD+R, DVD-R
Up to 8X
DVD-ROM DL, DVD-
DVD-ROM DL, DVD-DVD-ROM DL, DVD-
DVD-ROM DL, DVD-
ROM
ROMROM
ROM
Up to 8X
CD-ROM, CD-R
CD-ROM, CD-RCD-ROM, CD-R
CD-ROM, CD-R
Up to 24X
CD-RW
CD-RWCD-RW
CD-RW
Up to 24X
Access time
Access timeAccess time
Access time
(typical reads, including
settling)
Random
RandomRandom
Random
DVD: < 140 ms (typical), CD: < 125 ms
(typical)
Full Stroke
Full StrokeFull Stroke
Full Stroke
DVD: < 250 ms (seek), CD: < 210 ms (seek)
Stop Time
Stop TimeStop Time
Stop Time
< 4 seconds
Cache Buffer
Cache BufferCache Buffer
Cache Buffer
2 MB (minimum)
Data Transfer Modes
Data Transfer ModesData Transfer Modes
Data Transfer Modes
ATA PIO mode 4 (16.7 MB/s); ATA Multi-word
DMA mode 2 (16.7 MB/s); ATA UltraDMA Mode
3 (44.4 MB/s - default)
Power
PowerPower
Power
Source
SourceSource
Source
Four-pin, DC power receptacle
DC Power Requirement
DC Power RequirementDC Power Requirement
DC Power Requirement
5 VDC ± 5%-100 mV ripple p-p
12 VDC ± 5%-200 mV ripple p-p
DC Current
DC CurrentDC Current
DC Current
5 VDC (< 1000 mA typical, 1600 mA
maximum)
12 VDC (< 600 mA typical, 1400 mA
maximum)
Total Drive Power
Total Drive PowerTotal Drive Power
Total Drive Power
(standby mode)
< 2.5 Watt
Audio output
Audio outputAudio output
Audio output
Line-Out
Line-OutLine-Out
Line-Out
0.7 VRMS
Signal-to-Noise Ratio
Signal-to-Noise RatioSignal-to-Noise Ratio
Signal-to-Noise Ratio
74 dB
Channel Separation
Channel SeparationChannel Separation
Channel Separation
65 dB
Environmental conditions
Environmental conditionsEnvironmental conditions
Environmental conditions
(operating – non-
condensing)
Temperature
TemperatureTemperature
Temperature
41° to 122° F (5° to 50° C)
Relative Humidity
Relative HumidityRelative Humidity
Relative Humidity
10% to 90%
Maximum Wet Bulb
Maximum Wet BulbMaximum Wet Bulb
Maximum Wet Bulb
Temperature
TemperatureTemperature
Temperature
86° F (30° C)
QuickSpecs
HP Compaq dc7800 Business PC
HP Compaq dc7800 Business PCHP Compaq dc7800 Business PC
HP Compaq dc7800 Business PC
Technical Specifications - Optical Storage
DA - 12744 North America — Version 25 — May 16, 2008
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