Product comparison · 2 pcs/workstations

HP Compaq dc7900 vs HP Compaq dc7900 Intel® Core™2 Duo E8400

105specifications compared
30differ
75identical
34known for one product only

Key differences

The HP Compaq dc7900 has 2 more processor cores than the HP Compaq dc7900 Intel® Core™2 Duo E8400 (4 vs 2). The HP Compaq dc7900 has 2 more processor threads than the HP Compaq dc7900 Intel® Core™2 Duo E8400 (4 vs 2). The HP Compaq dc7900 Intel® Core™2 Duo E8400 has 0.34 GHz more processor frequency than the HP Compaq dc7900 (3 GHz vs 2.66 GHz). Only the HP Compaq dc7900 Intel® Core™2 Duo E8400 has on-board graphics card. Processor family: Intel® Core™2 Quad on the HP Compaq dc7900, Intel® Core™2 Duo on the HP Compaq dc7900 Intel® Core™2 Duo E8400.

Processor family
- Compaq dc7900:Intel® Core™2 Quad
- Compaq dc7900 Intel® Core™2 Duo E8400:Intel® Core™2 Duo
Processor model
- Compaq dc7900:Q9400
- Compaq dc7900 Intel® Core™2 Duo E8400:E8400
Processor cores
- Compaq dc7900:4
- Compaq dc7900 Intel® Core™2 Duo E8400:2
Processor threads
- Compaq dc7900:4
- Compaq dc7900 Intel® Core™2 Duo E8400:2
Processor frequency
- Compaq dc7900:2.66 GHz
- Compaq dc7900 Intel® Core™2 Duo E8400:3 GHz
Processor codename
- Compaq dc7900:Yorkfield
- Compaq dc7900 Intel® Core™2 Duo E8400:Wolfdale
Thermal Design Power (TDP)
- Compaq dc7900:95 W
- Compaq dc7900 Intel® Core™2 Duo E8400:65 W
Tcase
- Compaq dc7900:71.4 °C
- Compaq dc7900 Intel® Core™2 Duo E8400:72.4 °C

Side by side

Differences highlightedShow differences only

Comparison of Compaq dc7900, dc7900
139 specifications	A HP Compaq dc7900 View product	B HP Compaq dc7900 Intel® Core™2 Duo E8400 Model dc7900 View product
Processor13 differ
Processor manufacturer	Intel	Intel
Processor familyDiffers	Intel® Core™2 Quad	Intel® Core™2 Duo
Processor modelDiffers	Q9400	E8400
Processor coresDiffers	4	2
Processor threadsDiffers	4	2
Processor frequencyDiffers	2.66 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 seriesDiffers	Intel Core 2 Quad Q9000 Series for Desktop	Intel Core 2 Duo E8000 Series
Processor codenameDiffers	Yorkfield	Wolfdale
Thermal Design Power (TDP)Differs	95 W	65 W
TcaseDiffers	71.4 °C	72.4 °C
Processor socket	LGA 775 (Socket T)	LGA 775 (Socket T)
Number of Processing Die TransistorsDiffers	456 M	410 M
Processing Die sizeDiffers	164 mm²	107 mm²
CPU multiplier (bus/core ratio)Differs	8	9
SteppingDiffers	R0	E0
ECC supported by processor	No	No
Memoryidentical
Internal memory	2 GB	2 GB
Maximum internal memory	16 GB	16 GB
Internal memory type	DDR2-SDRAM	DDR2-SDRAM
Memory layout (slots x size)	2 x 1 GB	2 x 1 GB
Memory slotsKnown for one	Unknown — not stated by the source	4x DIMM
Memory clock speed	800 MHz	800 MHz
Storage3 differ
Total storage capacityDiffers	500 GB	160 GB
Optical drive typeDiffers	DVD Super Multi	DVD-ROM
Storage media	HDD	HDD
Number of HDDs supportedKnown for one	Unknown — not stated by the source	1
Total HDDs capacityKnown for one	Unknown — not stated by the source	160 GB
Number of HDDs installedKnown for one	Unknown — not stated by the source	1
HDD capacityKnown for one	Unknown — not stated by the source	160 GB
HDD interfaceDiffers	SATA	SATA II
HDD speed	7200 RPM	7200 RPM
HDD sizeKnown for one	Unknown — not stated by the source	3.5"
Card reader integrated	Yes	Yes
Graphics2 differ
On-board graphics cardDiffers	No	Yes
Discrete graphics card modelDiffers	Intel® GMA 4500M	Not available
On-board graphics card familyKnown for one	Unknown — not stated by the source	Intel® GMA
On-board graphics card model	Not available	Not available
Discrete graphics cardKnown for one	Yes	Unknown — not stated by the source
Performanceidentical
Product type	PC	PC
Motherboard chipsetKnown for one	Unknown — not stated by the source	Intel® Q45
Optical driveidentical
Optical drives quantityKnown for one	Unknown — not stated by the source	1
LightScribeKnown for one	Yes	Unknown — not stated by the source
Networkidentical
Ethernet LAN	Yes	Yes
Ethernet LAN data ratesKnown for one	Unknown — not stated by the source	10,100,1000 Mbit/s
Cabling technologyKnown for one	Unknown — not stated by the source	10/100/1000Base-T(X)
Wi-Fi	No	No
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers	6	8
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	0	0
DisplayPorts quantity	1	1
HDMI ports quantity	0	0
Ethernet LAN (RJ-45) ports	1	1
Headphone outputs	1	1
Line-outKnown for one	Unknown — not stated by the source	Yes
Line-inKnown for one	Unknown — not stated by the source	Yes
Microphone in	Yes	Yes
VGA (D-Sub) ports quantity	1	1
DVI port	No	No
PS/2 ports quantity	2	2
Serial ports quantity	1	1
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantityKnown for one	0	Unknown — not stated by the source
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantityKnown for one	0	Unknown — not stated by the source
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantityKnown for one	0	Unknown — not stated by the source
Thunderbolt 3 ports quantityKnown for one	0	Unknown — not stated by the source
DC-in jackKnown for one	Yes	Unknown — not stated by the source
Parallel ports quantityKnown for one	1	Unknown — not stated by the source
Expansion slots1 differ
Number of 3.5" baysKnown for one	Unknown — not stated by the source	2
PCI Express x1 slotsKnown for one	Unknown — not stated by the source	1
PCI Express x16 slotsDiffers	1	2
PCI slotsKnown for one	Unknown — not stated by the source	1
Power1 differ
Power supplyDiffers	365 W	240 W
Power supply input voltage	100 - 240 V	100 - 240 V
Power supply input frequency	50 - 60 Hz	50 - 60 Hz
Power consumption (typical)Known for one	365 W	Unknown — not stated by the source
Design2 differ
Chassis typeDiffers	Mini Tower	SFF
Placement supportedDiffers	Vertical	Horizontal
Number of 5.25" baysKnown for one	Unknown — not stated by the source	1
Product colour	Black	Black
Cooling typeKnown for one	Unknown — not stated by the source	Active
Country of origin	China	China
Cable lock slotKnown for one	Yes	Unknown — not stated by the source
Cable lock slot typeKnown for one	Kensington	Unknown — not stated by the source
Softwareidentical
Operating system installed	Windows Vista Business	Windows Vista Business
Operating system architectureKnown for one	Unknown — not stated by the source	32-bit
Drivers includedKnown for one	Unknown — not stated by the source	Yes
Displayidentical
Display included	No	No
Processor special features2 differ
Embedded options available	Yes	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	35365	33910
Processor codeDiffers	SLB6B	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	HD	ADI1884
Operational conditionsidentical
Operating temperature (T-T)	10 - 35 °C	10 - 35 °C
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%
Weight & dimensions4 differ
WidthDiffers	177 mm	337 mm
DepthDiffers	452 mm	378 mm
HeightDiffers	447 mm	100 mm
WeightDiffers	11.8 kg	8.5 kg
Packaging contentidentical
Mouse included	Yes	Yes
Keyboard included	Yes	Yes
AC adapter includedKnown for one	Yes	Unknown — not stated by the source
Sustainabilityidentical
Sustainability certificatesKnown for one	Unknown — not stated by the source	EPEAT Gold, ENERGY STAR

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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