Product comparison · 2 pcs/workstations

HP Compaq dc7900 Small Form Factor PC vs HP Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR)

112specifications compared
32differ
80identical
40known for one product only

Key differences

The HP Compaq dc7900 Small Form Factor PC has 0.16 GHz more processor frequency than the HP Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR) (3.16 GHz vs 3 GHz). The HP Compaq dc7900 Small Form Factor PC has 0.5 more CPU multiplier (bus/core ratio) than the HP Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR) (9.5 vs 9). The HP Compaq dc7900 Small Form Factor PC has 1 more serial ports quantity than the HP Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR) (1 vs 0). Only the HP Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR) has embedded options available. Processor model: E8500 on the HP Compaq dc7900 Small Form Factor PC, E8400 on the HP Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR).

Processor model
- Compaq dc7900 Small Form Factor PC:E8500
- Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR):E8400
Processor frequency
- Compaq dc7900 Small Form Factor PC:3.16 GHz
- Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR):3 GHz
CPU multiplier (bus/core ratio)
- Compaq dc7900 Small Form Factor PC:9.5
- Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR):9
Stepping
- Compaq dc7900 Small Form Factor PC:C0
- Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR):E0
Optical drive type
- Compaq dc7900 Small Form Factor PC:DVD±RW
- Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR):DVD Super Multi
Serial ports quantity
- Compaq dc7900 Small Form Factor PC:1
- Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR):0
Power supply
- Compaq dc7900 Small Form Factor PC:240 W
- Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR):135 W
Power consumption (typical)
- Compaq dc7900 Small Form Factor PC:240 W
- Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR):135 W

Side by side

Differences highlightedShow differences only

Comparison of Compaq dc7900 Small Form Factor PC, Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR)
152 specifications	A HP Compaq dc7900 Small Form Factor PC View product	B HP Compaq dc7900 Ultra-slim Desktop PC (ENERGY STAR)View product
Processor4 differ
Processor manufacturer	Intel	Intel
Processor family	Intel® Core™2 Duo	Intel® Core™2 Duo
Processor modelDiffers	E8500	E8400
Processor cores	2	2
Processor threads	2	2
Processor frequencyDiffers	3.16 GHz	3 GHz
Processor cache	6 MB	6 MB
Processor cache type	L2	L2
Processor front side bus	1333 MHz	1333 MHz
Bus type	FSB	FSB
FSB Parity	No	No
Processor lithography	45 nm	45 nm
Processor operating modes	64-bit	64-bit
Processor series	Intel Core 2 Duo E8000 Series	Intel Core 2 Duo E8000 Series
Processor codename	Wolfdale	Wolfdale
Thermal Design Power (TDP)	65 W	65 W
Tcase	72.4 °C	72.4 °C
Processor socket	LGA 775 (Socket T)	LGA 775 (Socket T)
Number of Processing Die Transistors	410 M	410 M
Processing Die size	107 mm²	107 mm²
CPU multiplier (bus/core ratio)Differs	9.5	9
SteppingDiffers	C0	E0
ECC supported by processor	No	No
Processor system typeKnown for one	DP	Unknown — not stated by the source
Processor core voltage (AC)Known for one	0.850/1.3625 V	Unknown — not stated by the source
Memoryidentical
Internal memory	2 GB	2 GB
Internal memory type	DDR2-SDRAM	DDR2-SDRAM
Memory slotsKnown for one	Unknown — not stated by the source	2x SO-DIMM
Memory clock speed	800 MHz	800 MHz
Memory upgradeKnown for one	Unknown — not stated by the source	8 GB
Maximum internal memoryKnown for one	16 GB	Unknown — not stated by the source
Memory layout (slots x size)Known for one	2 x 1 GB	Unknown — not stated by the source
Minimum RAMKnown for one	512 MB	Unknown — not stated by the source
Standard memory capacityKnown for one	2 MB	Unknown — not stated by the source
Storage3 differ
Total storage capacity	160 GB	160 GB
Optical drive typeDiffers	DVD±RW	DVD Super Multi
HDD capacityKnown for one	Unknown — not stated by the source	160 GB
HDD interfaceKnown for one	Unknown — not stated by the source	SATA II
HDD speed	7200 RPM	7200 RPM
Card reader integrated	No	No
Maximum HDD capacityKnown for one	Unknown — not stated by the source	250 GB
Minimum storage drive spaceKnown for one	Unknown — not stated by the source	80 GB
Floppy drive installedKnown for one	Unknown — not stated by the source	No
Storage drive controllerDiffers	SATA 3.0GB/s with NCQ and Smart IV	SATA 3.0 Gb/s
Storage drive typeDiffers	2 x 160 GB with optional dual drive RAID + Sata 2nd Cable	160 GB 7200 rpm SATA 3.0 Gb/s NCQ, Smart IV
HDD controller typeKnown for one	Unknown — not stated by the source	SATA (7200 rpm)
Disk subsystem controllerKnown for one	SATA 3.0Gb/s	Unknown — not stated by the source
Diskette driveKnown for one	Optional 1.44 MB Diskette Drive, HP Media Card Reader 16-in-1 (5.25" with PCI)	Unknown — not stated by the source
HDD noteKnown for one	RAID 1 Mirrored Array configuration	Unknown — not stated by the source
Graphics1 differ
On-board graphics cardKnown for one	Unknown — not stated by the source	Yes
Discrete graphics card model	Intel® GMA 4500M	Intel® GMA 4500M
On-board graphics card modelKnown for one	Unknown — not stated by the source	Not available
Graphics card familyKnown for one	Unknown — not stated by the source	Intel
Video card featuresDiffers	3D/2D Controller: support is fully compliant with Microsoft standard API such as Microsoft DirectX9, DirectXVA, VMR9, GDI/GDI+; OpenGL 1.4.; Integrated VGA Controller; Integrated 400 MHz RAMDAC; Overlay Planes: Single overlay support with 5x3 filtering; Maximum Color Depth: 32 bits/pixel; Multi-disp	Integrated Intel Graphics Media Accelerator 4500
Video adapter, bus	PCI Express x16	PCI Express x16
Video card resolutionKnown for one	Maximum Vertical Refresh Rate: 85 Hz at up to 1920x1440, 75 Hz at 2048x1536	Unknown — not stated by the source
Performanceidentical
Product type	PC	PC
Optical driveidentical
LightScribe	Yes	Yes
Networkidentical
Ethernet LANKnown for one	Unknown — not stated by the source	Yes
Wi-FiKnown for one	Unknown — not stated by the source	No
Networking features	Gigabit Ethernet	Gigabit Ethernet
Ports & interfaces2 differ
USB 2.0 ports quantity	8	8
HDMI ports quantityKnown for one	Unknown — not stated by the source	0
Ethernet LAN (RJ-45) ports	1	1
Headphone outputs	1	1
Microphone in	Yes	Yes
VGA (D-Sub) ports quantity	1	1
DVI portKnown for one	Unknown — not stated by the source	No
PS/2 ports quantity	2	2
Firewire (IEEE 1394) portsKnown for one	Unknown — not stated by the source	0
Serial ports quantityDiffers	1	0
Parallel ports quantity	0	0
I/O portsDiffers	Rear: 6 USB 2.0, 1 serial port, 2 PS/2, 1 RJ-45, 1 VGA, 1 DisplayPort, audio in/out; Front: 2 USB 2.0, audio ports; Optional: 2nd serial port, 1 parallel port	8 USB 2.0; 1 microphone in; 1 audio in; 1 audio out; 1 DisplayPort; 1 RJ-45; 2 PS/2; 1 VGA
Rear portsKnown for one	6 USB 2.0; 1 serial; 2 PS/2; 1 RJ-45; 1 external VGA monitor; 1 DisplayPort; 1 audio in; 1 audio out; 1 parallel (optional); 1 serial (optional 2nd); 1 eSATA (optional)	Unknown — not stated by the source
Rear ports noteKnown for one	6 USB 2.0; 1 serial; 2 PS/2; 1 RJ-45; 1 external VGA monitor; 1 DisplayPort; 1 audio in; 1 audio out; 1 parallel (optional); 1 serial (optional 2nd); 1 eSATA (optional)	Unknown — not stated by the source
Expansion slots1 differ
Expansion slotsDiffers	1 low-profile PCI, 2 low-profile PCI Express x16, 1 low-profile PCI Express x1	1 x mini PCI
Power4 differ
Power supply typeDiffers	240W 85% Efficient - Active PFC	135W External 87% High Efficiency Active PFC
Power requirementsDiffers	Input voltage 90 – 264 / 100 – 240 VAC, 50/60 Hz, 47 – 63 Hz, active PFC (85% High Efficiency) Operating Voltage Range: 90 – 264 VAC; Rated Voltage Range: 100 – 240 VAC; Rated Line Frequency: 50/60 Hz; Operating Line Frequency Range: 47 – 63 Hz; Rated Input Current: 4.0 A; with Energy Efficient Powe	135W 87% efficient external power supply – active PFC
Power supplyDiffers	240 W	135 W
Power consumption (typical)Differs	240 W	135 W
Power managementKnown for one	Operating Voltage Range: 90 – 264 VAC; Rated Voltage Range: 100 – 240 VAC; Rated Line Frequency: 50/60 Hz; Operating Line Frequency Range: 47 – 63 Hz; Rated Input Current: 4.0 A; with Energy Efficient Power Supply: 3.5 A; Current Leakage (NFPA 99): < 275 µA; System Heat Dissipation: Typical 198 btu/	Unknown — not stated by the source
Designidentical
ErgonomicsKnown for one	Unknown — not stated by the source	Tower stand
Internal drive baysKnown for one	Unknown — not stated by the source	1 x 2.5"
Country of origin	China	China
Upgrade type	Windows Vista capable	Windows Vista capable
Chassis typeKnown for one	SFF	Unknown — not stated by the source
Softwareidentical
Operating system installed	Windows Vista Business	Windows Vista Business
Applications supported	Windows Vista Premium ready	Windows Vista Premium ready
Bundled software	On some models only (not included with FreeDOS): HP ProtectTools Security Software Suite Version 4.0, HP Power Manager, HP Firefox Virtual Browser, HP Backup and Recovery Manager, HP Insight Diagnostics Software (available via HP Backup and Recovery Manager), Computer Setup Utility, McAfee AntiVirus	On some models only (not included with FreeDOS): HP ProtectTools Security Software Suite Version 4.0, HP Power Manager, HP Firefox Virtual Browser, HP Backup and Recovery Manager, HP Insight Diagnostics Software (available via HP Backup and Recovery Manager), Computer Setup Utility, McAfee AntiVirus
Driver LAN	Microsoft Windows Vista, Microsoft Windows XP	Microsoft Windows Vista, Microsoft Windows XP
Compatible operating systemsKnown for one	Genuine Windows XP Professional; Genuine Windows XP Home	Unknown — not stated by the source
Displayidentical
Display included	No	No
Processor special features3 differ
Embedded options availableDiffers	No	Yes
Enhanced Intel SpeedStep Technology	Yes	Yes
Execute Disable Bit	Yes	Yes
Graphics & IMC lithographyKnown for one	Unknown — not stated by the source	45 nm
Idle States	Yes	Yes
Intel 64	Yes	Yes
Intel Clear Video Technology	No	No
Intel Demand Based Switching	No	No
Intel Dual Display Capable Technology	No	No
Intel Enhanced Halt State	Yes	Yes
Intel FDI Technology	No	No
Intel Fast Memory Access	No	No
Intel Flex Memory Access	No	No
Intel Rapid Storage Technology	No	No
Intel Trusted Execution Technology	Yes	Yes
Intel VT-x with Extended Page Tables (EPT)	No	No
Intel Virtualization Technology (VT-x)	Yes	Yes
Intel Virtualization Technology for Directed I/O (VT-d)	Yes	Yes
Intel® AES New Instructions (Intel® AES-NI)	No	No
Intel® Clear Video HD Technology (Intel® CVT HD)	No	No
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)	No	No
Intel® InTru™ 3D Technology	No	No
Intel® Insider™	No	No
Intel® Wireless Display (Intel® WiDi)	No	No
Processor ARK IDDiffers	33911	33910
Processor codeDiffers	SLAPK	SLB9J
Processor package size	37.5 x 37.5 mm	37.5 x 37.5 mm
Thermal Monitoring Technologies	Yes	Yes
Intel® Turbo Boost Technology	No	No
Intel® Hyper Threading Technology (Intel® HT Technology)	No	No
Intel® Quick Sync Video Technology	No	No
Intel® My WiFi Technology (Intel® MWT)	No	No
Intel® Anti-Theft Technology (Intel® AT)	No	No
Conflict-Free processor	No	No
Audio1 differ
Audio systemDiffers	High Definition Audio	HD ADI1884
Audio included	Integrated HD audio with ADI1884 codec, internal PC speaker	Integrated HD audio with ADI1884 codec, internal PC speaker
Operational conditions1 differ
Operating temperature (T-T)Differs	10 - 35 °C	50 - 95 °F
Storage temperature (T-T)	-30 - 60 °C	-30 - 60 °C
Operating relative humidity (H-H)	10 - 90%	10 - 90%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Non-operating altitude	9144	9144
Relative humidityKnown for one	10 - 90%	Unknown — not stated by the source
Non-operating relative humidity (non-condensing)Known for one	5 - 90%	Unknown — not stated by the source
Weight & dimensions6 differ
WidthDiffers	337 mm	251.5 mm
DepthDiffers	378 mm	254 mm
HeightDiffers	100 mm	66 mm
WeightDiffers	8.5 kg	3.1 kg
Size (imperial)Differs	33.8 cm (13.3")	25.1 cm (9.9")
Weight (imperial)Differs	18.75 lb	7.0 lb
Packaging contentidentical
Remote control includedKnown for one	Unknown — not stated by the source	No
Certificates1 differ
CertificationDiffers	ENERGY STAR qualified; EPEAT Gold; 85% efficient power supply	ENERGY STAR qualified; EPEAT Gold; 87% efficient power supply
Keyboard2 differ
Pointing deviceDiffers	HP PS/2 2-Button Optical Scroll Mouse	PS/2 2-button optical scroll mouse
Keyboard typeDiffers	HP PS/2 Standard Keyboard	PS/2 standard keyboard
Multimediaidentical
Multimedia	Integrated High Definition audio with ADI1884 codec (all ports are stereo)	Integrated High Definition audio with ADI1884 codec (all ports are stereo)
Features1 differ
Security management descriptionDiffers	Integrated 1.2 TPM Embedded Security Chip (except for Russia), HP Business PC Security Lock, HP USB Smartcard Keyboard	HP ProtectTools Security Software Suite; Embedded TPM 1.2 compliant security module (TPM module disabled where use is restricted by law); TPM Pre-Boot Authentication (via BIOS); Smartcard Pre-boot Authentication (via BIOS); Stringent Security (via BIOS - must be enabled); SATA port disablement (via
Manageability featuresKnown for one	RAID 1 Mirrored Array. Energy efficient, space saving design. Long, stable lifecycle.	Unknown — not stated by the source
Other features2 differ
Security featuresDiffers	Kensington Lock, Solenoid Hood Lock / Sensor, HP 2008 (SFF) Wall Mount/Security Sleeve	Kensington Lock, HP 2008 (SFF) Wall Mount/Security Sleeve
TV tuner integratedKnown for one	Unknown — not stated by the source	No
Drive baysDiffers	1 external 5.25 inch, 1 external 3.5 inch 1 internal 3.5 inch	1 - slimline 1 – 2.5-in
Packaging dataidentical
Package weightKnown for one	7 kg	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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