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 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 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
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
Memoryidentical
Memory slotsKnown for one	Unknown — not stated by the source	4x DIMM
Storage3 differ
Total storage capacityDiffers	500 GB	160 GB
Optical drive typeDiffers	DVD Super Multi	DVD-ROM
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 sizeKnown for one	Unknown — not stated by the source	3.5"
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
Discrete graphics cardKnown for one	Yes	Unknown — not stated by the source
Performanceidentical
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 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)
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers	6	8
Line-outKnown for one	Unknown — not stated by the source	Yes
Line-inKnown for one	Unknown — not stated by the source	Yes
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 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
Cooling typeKnown for one	Unknown — not stated by the source	Active
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 architectureKnown for one	Unknown — not stated by the source	32-bit
Drivers includedKnown for one	Unknown — not stated by the source	Yes
Processor special features2 differ
Graphics & IMC lithographyKnown for one	Unknown — not stated by the source	45 nm
Processor ARK IDDiffers	35365	33910
Processor codeDiffers	SLB6B	SLB9J
Audio1 differ
Audio systemDiffers	HD	ADI1884
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
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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