Product comparison · 2 pcs/workstations

HP Compaq dc5100 microtower pc (EC956ET) vs Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz

72specifications compared
17differ
55identical
49known for one product only

Key differences

The Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has 10 more processor model than the HP Compaq dc5100 microtower pc (EC956ET) (640 vs 630). The Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has 0.2 GHz more processor frequency than the HP Compaq dc5100 microtower pc (EC956ET) (3.2 GHz vs 3 GHz). The Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has 1 more CPU multiplier (bus/core ratio) than the HP Compaq dc5100 microtower pc (EC956ET) (16 vs 15). Only the Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has thermal Monitoring Technologies. Internal memory type: DDR2-SDRAM on the HP Compaq dc5100 microtower pc (EC956ET), DDR-SDRAM on the Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz.

Processor model
- Compaq dc5100 microtower pc (EC956ET):630
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:640
Processor frequency
- Compaq dc5100 microtower pc (EC956ET):3 GHz
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:3.2 GHz
CPU multiplier (bus/core ratio)
- Compaq dc5100 microtower pc (EC956ET):15
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:16
Maximum internal memory
- Compaq dc5100 microtower pc (EC956ET):4 GB
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:2 GB
Internal memory type
- Compaq dc5100 microtower pc (EC956ET):DDR2-SDRAM
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:DDR-SDRAM
USB 2.0 ports quantity
- Compaq dc5100 microtower pc (EC956ET):6
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:8
Power supply
- Compaq dc5100 microtower pc (EC956ET):300 W
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:225 W
Processor ARK ID
- Compaq dc5100 microtower pc (EC956ET):27478
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:27480

Side by side

Differences highlightedShow differences only

Comparison of Compaq dc5100 microtower pc (EC956ET), ThinkCentre A51 Pentium 4 640 HT 3.2GHz
121 specifications	A HP Compaq dc5100 microtower pc (EC956ET)View product	B Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz View product
Processor3 differ
Processor manufacturer	Intel	Intel
Processor family	Intel® Pentium® 4	Intel® Pentium® 4
Processor modelDiffers	630	640
Processor cores	1	1
Processor threads	2	2
Processor frequencyDiffers	3 GHz	3.2 GHz
Processor cache	2 MB	2 MB
Processor cache type	L2	L2
Processor front side bus	800 MHz	800 MHz
Bus type	FSB	FSB
FSB Parity	No	No
Processor lithography	90 nm	90 nm
Processor operating modes	64-bit	64-bit
Processor codename	Prescott	Prescott
Thermal Design Power (TDP)	84 W	84 W
Tcase	66.6 °C	66.6 °C
PCI Express slots versionKnown for one	Unknown — not stated by the source	2.0
Processor socket	LGA 775 (Socket T)	LGA 775 (Socket T)
Number of Processing Die Transistors	169 M	169 M
Processing Die size	135 mm²	135 mm²
CPU multiplier (bus/core ratio)Differs	15	16
Processor core voltage (AC)Known for one	Unknown — not stated by the source	1.25 - 1.388 V
Maximum internal memory supported by processorKnown for one	Unknown — not stated by the source	32 GB
Memory types supported by processorKnown for one	Unknown — not stated by the source	DDR3-SDRAM
Memory clock speeds supported by processorKnown for one	Unknown — not stated by the source	1066 MHz
Memory bandwidth supported by processor (max)Known for one	Unknown — not stated by the source	17 GB/s
ECC supported by processor	No	No
Processor seriesKnown for one	Intel Pentium 4 600 Series supporting Hyper-Threading Technology	Unknown — not stated by the source
Number of processors installedKnown for one	1	Unknown — not stated by the source
Processor technologyKnown for one	HT	Unknown — not stated by the source
Memory2 differ
Internal memory	0.5 GB	0.5 GB
Maximum internal memoryDiffers	4 GB	2 GB
Internal memory typeDiffers	DDR2-SDRAM	DDR-SDRAM
Memory channelsKnown for one	Unknown — not stated by the source	Dual-channel
Memory slotsKnown for one	4x DIMM	Unknown — not stated by the source
Storageidentical
Total storage capacity	80 GB	80 GB
Optical drive typeKnown for one	Unknown — not stated by the source	DVD-ROM
HDD interface	SATA	SATA
HDD speed	7200 RPM	7200 RPM
Diskette drive memoryKnown for one	Unknown — not stated by the source	1.44 MB
Storage drive controllerKnown for one	SMART III Serial ATA, 1.5GB/s	Unknown — not stated by the source
Graphics1 differ
On-board graphics cardKnown for one	Unknown — not stated by the source	Yes
Discrete graphics card modelKnown for one	Unknown — not stated by the source	Intel® GMA 900
On-board graphics card familyKnown for one	Unknown — not stated by the source	Intel® HD Graphics
On-board graphics card modelKnown for one	Unknown — not stated by the source	Intel® HD Graphics
Number of displays supported (on-board graphics)Known for one	Unknown — not stated by the source	2
On-board graphics card base frequencyKnown for one	Unknown — not stated by the source	850 MHz
On-board graphics card dynamic frequency (max)Known for one	Unknown — not stated by the source	1100 MHz
Video adapter resolutionDiffers	1920x1440@100Hz; 2048x1536@75Hz	2048x1536 16777216 colors
Video adapter, busKnown for one	Unknown — not stated by the source	PCI Express
Graphics card RAMDACKnown for one	400 MHz	Unknown — not stated by the source
Maximum graphics card memoryKnown for one	0.128 GB	Unknown — not stated by the source
Performanceidentical
Product type	PC	PC
Optical driveidentical
CD read speedKnown for one	Unknown — not stated by the source	48x
CD write speedKnown for one	Unknown — not stated by the source	48x
CD rewrite speedKnown for one	Unknown — not stated by the source	32x
DVD read speedKnown for one	Unknown — not stated by the source	16x
Network1 differ
Networking featuresDiffers	Gigabit Ethernet	Ethernet/Fast Ethernet/Gigabit Ethernet
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers	6	8
Ethernet LAN (RJ-45) ports	1	1
Headphone outputs	1	1
Microphone in	Yes	Yes
VGA (D-Sub) ports quantity	1	1
PS/2 ports quantity	2	2
Parallel ports quantity	1	1
Serial ports quantityKnown for one	1	Unknown — not stated by the source
Power1 differ
Power supplyDiffers	300 W	225 W
Designidentical
Chassis typeKnown for one	Unknown — not stated by the source	SFF
External drive baysKnown for one	2x 5.25"; 2x 3.5"	Unknown — not stated by the source
Internal drive baysKnown for one	2x 3.5"	Unknown — not stated by the source
Country of originKnown for one	China	Unknown — not stated by the source
Software1 differ
Operating system installedKnown for one	Unknown — not stated by the source	Windows XP Professional
Bundled softwareDiffers	Microsoft Office SBE 2003 Norton Antivirus 2005	Lotus Notes Stand-alone Client (license), Lotus SmartSuite Millennium (license), Access program, IBM Director Agent (web deliverable), ThinkVantage Client Security Software (web-downloadable), ThinkVantage Rescue and Recovery with Rapid Restore, Norton AntiVirus 2004 OEM Version, PC Doctor diagnosti
Compatible operating systemsKnown for one	Microsoft Windows XP Professional	Unknown — not stated by the source
Displayidentical
Display included	No	No
Processor special features2 differ
CPU configuration (max)Known for one	Unknown — not stated by the source	1
Embedded options available	No	No
Enhanced Intel SpeedStep Technology	Yes	Yes
Execute Disable Bit	Yes	Yes
Idle States	No	No
Intel 64	Yes	Yes
Intel Clear Video Technology	No	No
Intel Demand Based Switching	No	No
Intel Enhanced Halt State	No	No
Intel Rapid Storage Technology	No	No
Intel Trusted Execution Technology	No	No
Intel Virtualization Technology (VT-x)	No	No
Intel Virtualization Technology for Directed I/O (VT-d)	No	No
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	27478	27480
Processor package size	37.5 x 37.5 mm	37.5 x 37.5 mm
Supported instruction setsKnown for one	Unknown — not stated by the source	SSE4.1/4.2
Thermal Monitoring TechnologiesDiffers	No	Yes
Intel® Turbo Boost Technology	No	No
Intel® Hyper Threading Technology (Intel® HT Technology)	Yes	Yes
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
Intel Dual Display Capable TechnologyKnown for one	No	Unknown — not stated by the source
Intel FDI TechnologyKnown for one	No	Unknown — not stated by the source
Intel Fast Memory AccessKnown for one	No	Unknown — not stated by the source
Intel Flex Memory AccessKnown for one	No	Unknown — not stated by the source
Intel VT-x with Extended Page Tables (EPT)Known for one	No	Unknown — not stated by the source
Audio1 differ
Audio systemDiffers	Integrated	SoundMAX Cadenza
Weight & dimensions4 differ
WidthDiffers	175 mm	309 mm
DepthDiffers	420 mm	359 mm
HeightDiffers	366 mm	85 mm
WeightDiffers	11 kg	8.5 kg
Other featuresidentical
Security featuresKnown for one	Unknown — not stated by the source	-Boot without keyboard or mouse -Configuration password -Diskette Boot inhibit -Diskette I/O control -Hard disk drive password -Hard drive I/O control -Parallel port I/O control -Power on password -Security slot (for attachment of optional cable lock) -Serial port I/O control -U-Bolt anchoring featu
Bundled hardwareKnown for one	Optical Mouse	Unknown — not stated by the source
Expansion slotsidentical
Expansion slotsKnown for one	PCI express x1	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)Known for one	10 - 35 °C	Unknown — not stated by the source
Storage temperature (T-T)Known for one	-30 - 60 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	10 - 90%	Unknown — not stated by the source
Storage relative humidity (H-H)Known for one	5 - 95%	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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