Product comparison · 2 pcs/workstations

Lenovo ThinkCentre A55 Intel® Pentium® D 915 vs Lenovo ThinkCentre M55 Intel® Pentium® D 915

80specifications compared
8differ
72identical
13known for one product only

Key differences

Internal memory
- ThinkCentre A55 Intel® Pentium® D 915:0.5 GB
- ThinkCentre M55 Intel® Pentium® D 915:1 GB
Total storage capacity
- ThinkCentre A55 Intel® Pentium® D 915:80 GB
- ThinkCentre M55 Intel® Pentium® D 915:160 GB
Audio system
- ThinkCentre A55 Intel® Pentium® D 915:ADI 1986 A
- ThinkCentre M55 Intel® Pentium® D 915:ADI 1983 HD
Width
- ThinkCentre A55 Intel® Pentium® D 915:310 mm
- ThinkCentre M55 Intel® Pentium® D 915:276 mm
Depth
- ThinkCentre A55 Intel® Pentium® D 915:358 mm
- ThinkCentre M55 Intel® Pentium® D 915:270 mm
Height
- ThinkCentre A55 Intel® Pentium® D 915:85 mm
- ThinkCentre M55 Intel® Pentium® D 915:89 mm
Weight
- ThinkCentre A55 Intel® Pentium® D 915:8.5 kg
- ThinkCentre M55 Intel® Pentium® D 915:6.4 kg

Side by side

Differences highlightedShow differences only

Comparison of A55, M55
93 specifications	A Lenovo ThinkCentre A55 Intel® Pentium® D 915 Model A55 View product	B Lenovo ThinkCentre M55 Intel® Pentium® D 915 Model M55 View product
Processoridentical
Processor manufacturer	Intel	Intel
Processor family	Intel® Pentium® D	Intel® Pentium® D
Processor model	915	915
Processor cores	2	2
Processor threads	2	2
Processor frequency	2.8 GHz	2.8 GHz
Processor cache	4 MB	4 MB
Processor cache type	L2	L2
Processor front side bus	800 MHz	800 MHz
Bus type	FSB	FSB
FSB Parity	No	No
Processor lithography	65 nm	65 nm
Processor operating modes	64-bit	64-bit
Processor series	Intel Pentium D 900 Series	Intel Pentium D 900 Series
Processor codename	Presler	Presler
Thermal Design Power (TDP)	95 W	95 W
Tcase	63.4 °C	63.4 °C
Processor socket	LGA 775 (Socket T)	LGA 775 (Socket T)
Number of Processing Die Transistors	376 M	376 M
Processing Die size	162 mm²	162 mm²
CPU multiplier (bus/core ratio)	14	14
ECC supported by processor	No	No
Memory1 differ
Internal memoryDiffers	0.5 GB	1 GB
Internal memory type	DDR2-SDRAM	DDR2-SDRAM
Memory slots	2x DIMM	2x DIMM
Maximum internal memoryKnown for one	4 GB	Unknown — not stated by the source
Storage1 differ
Total storage capacityDiffers	80 GB	160 GB
Optical drive type	DVD-ROM	DVD-ROM
HDD interface	SATA	SATA
HDD speed	7200 RPM	7200 RPM
Graphicsidentical
Discrete graphics card model	Intel® GMA 3000	Intel® GMA 3000
Performanceidentical
Product type	PC	PC
Motherboard chipsetKnown for one	Unknown — not stated by the source	Intel® Q963 Express
Optical driveidentical
CD read speedKnown for one	Unknown — not stated by the source	24x
CD write speedKnown for one	Unknown — not stated by the source	24x
CD rewrite speedKnown for one	Unknown — not stated by the source	24x
DVD read speedKnown for one	Unknown — not stated by the source	8x
Networkidentical
Networking features	Ethernet/Fast Ethernet/Gigabit Ethernet	Ethernet/Fast Ethernet/Gigabit Ethernet
Ports & interfacesidentical
USB 2.0 ports quantity	8	8
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
Parallel ports quantity	1	1
DVI portKnown for one	Yes	Unknown — not stated by the source
PS/2 ports quantityKnown for one	2	Unknown — not stated by the source
Serial ports quantityKnown for one	1	Unknown — not stated by the source
Poweridentical
Power supply	225 W	225 W
Software1 differ
Operating system installed	Windows XP Professional	Windows XP Professional
Bundled softwareDiffers	Adobe Acrobat Reader, Diskeeper Lite from Diskeeper, Google Desktop, Google Toolbar, Lotus Notes Stand-alone Client (license), Lotus SmartSuite Millennium edition (license), Picasa, Symantec Client Security (OEM), ThinkVantage Client Security Software, ThinkVantage Productivity Center, ThinkVantage	Adobe Acrobat Reader, Diskeeper 9.0 Home Edition, Google Desktop, Google Toolbar, Microsoft Office Hybrid Pro image 2007, Picasa, ThinkVantage Client Security Solution, ThinkVantage Productivity Center, ThinkVantage Rescue & Recovery, ThinkVantage System Update, Sun JRE, Norton Internet Security (OE
Displayidentical
Display included	No	No
Processor special featuresidentical
Embedded options available	No	No
Enhanced Intel SpeedStep Technology	Yes	Yes
Execute Disable Bit	Yes	Yes
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	No	No
Intel VT-x with Extended Page Tables (EPT)	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
Physical Address Extension (PAE)	32 bit	32 bit
Processor ARK ID	27515	27515
Processor package size	37.5 x 37.5 mm	37.5 x 37.5 mm
Thermal Monitoring Technologies	No	No
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	ADI 1986 A	ADI 1983 HD
Weight & dimensions4 differ
WidthDiffers	310 mm	276 mm
DepthDiffers	358 mm	270 mm
HeightDiffers	85 mm	89 mm
WeightDiffers	8.5 kg	6.4 kg
Other featuresidentical
Intel segment taggingKnown for one	Unknown — not stated by the source	Enterprise, Professional
Designidentical
Chassis typeKnown for one	SFF	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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