Product comparison · 2 pcs/workstations

Lenovo M81 + ThinkVision LS2251 vs Lenovo ThinkCentre M90i Intel® Core™ i5 i5-650

106specifications compared
43differ
63identical
47known for one product only

Key differences

The Lenovo ThinkCentre M90i Intel® Core™ i5 i5-650 has 0.1 GHz more processor frequency than the Lenovo M81 + ThinkVision LS2251 (3.2 GHz vs 3.1 GHz). The Lenovo ThinkCentre M90i Intel® Core™ i5 i5-650 has 1 MB more processor cache than the Lenovo M81 + ThinkVision LS2251 (4 MB vs 3 MB). The Lenovo M81 + ThinkVision LS2251 has 2.5 GT/s more system bus rate than the Lenovo ThinkCentre M90i Intel® Core™ i5 i5-650 (5 GT/s vs 2.5 GT/s). Only the Lenovo M81 + ThinkVision LS2251 has display included. Only the Lenovo M81 + ThinkVision LS2251 has Intel Fast Memory Access.

Processor family
- M81 + ThinkVision LS2251:Intel® Core™ i3
- ThinkCentre M90i Intel® Core™ i5 i5-650:Intel® Core™ i5
Processor generation
- M81 + ThinkVision LS2251:2nd gen Intel® Core™ i3
- ThinkCentre M90i Intel® Core™ i5 i5-650:Intel® Core™ i5
Processor model
- M81 + ThinkVision LS2251:i3-2100
- ThinkCentre M90i Intel® Core™ i5 i5-650:i5-650
Processor frequency
- M81 + ThinkVision LS2251:3.1 GHz
- ThinkCentre M90i Intel® Core™ i5 i5-650:3.2 GHz
Processor cache
- M81 + ThinkVision LS2251:3 MB
- ThinkCentre M90i Intel® Core™ i5 i5-650:4 MB
System bus rate
- M81 + ThinkVision LS2251:5 GT/s
- ThinkCentre M90i Intel® Core™ i5 i5-650:2.5 GT/s
Processor codename
- M81 + ThinkVision LS2251:Sandy Bridge
- ThinkCentre M90i Intel® Core™ i5 i5-650:Clarkdale
Thermal Design Power (TDP)
- M81 + ThinkVision LS2251:35, 65
- ThinkCentre M90i Intel® Core™ i5 i5-650:73 W

Side by side

Differences highlightedShow differences only

Comparison of M81 + ThinkVision LS2251, M90i
153 specifications	A Lenovo M81 + ThinkVision LS2251 View product	B Lenovo ThinkCentre M90i Intel® Core™ i5 i5-650 Model M90i View product
Processor15 differ
Processor manufacturer	Intel	Intel
Processor familyDiffers	Intel® Core™ i3	Intel® Core™ i5
Processor generationDiffers	2nd gen Intel® Core™ i3	Intel® Core™ i5
Processor modelDiffers	i3-2100	i5-650
Processor cores	2	2
Processor threads	4	4
Processor boost frequencyKnown for one	Unknown — not stated by the source	3.46 GHz
Processor frequencyDiffers	3.1 GHz	3.2 GHz
Processor cacheDiffers	3 MB	4 MB
Processor cache type	Smart Cache	Smart Cache
Bus type	DMI	DMI
FSB Parity	No	No
System bus rateDiffers	5 GT/s	2.5 GT/s
Processor lithography	32 nm	32 nm
Processor operating modes	64-bit	64-bit
Processor seriesDiffers	Intel Core i3-2100 Desktop Series	Intel Core i5-600 Desktop Series
Processor codenameDiffers	Sandy Bridge	Clarkdale
Thermal Design Power (TDP)Differs	35, 65	73 W
TcaseDiffers	69.1 °C	72.6 °C
Maximum number of PCI Express lanes	16	16
PCI Express configurationsKnown for one	Unknown — not stated by the source	1x16, 2x8
PCI Express slots version	2.0	2.0
Number of processors installed	1	1
Processor socketDiffers	LGA 1155 (Socket H2)	LGA 1156 (Socket H)
Number of Processing Die TransistorsKnown for one	Unknown — not stated by the source	382 M
Processing Die sizeKnown for one	Unknown — not stated by the source	81 mm²
CPU multiplier (bus/core ratio)Differs	31	24
Maximum number of SMP processorsKnown for one	Unknown — not stated by the source	1
PlatformKnown for one	Unknown — not stated by the source	PC
SteppingDiffers	Q0	C2
Maximum internal memory supported by processorDiffers	32 GB	16 GB
Memory types supported by processorDiffers	DDR3-SDRAM	DDR3 1066/1333
Memory bandwidth supported by processor (max)	21 GB/s	21 GB/s
ECC supported by processor	No	No
Memory clock speeds supported by processorKnown for one	1066,1333 MHz	Unknown — not stated by the source
Memory3 differ
Internal memoryDiffers	2 GB	3 GB
Maximum internal memoryDiffers	16 GB	8 GB
Internal memory type	DDR3-SDRAM	DDR3-SDRAM
Memory layout (slots x size)Differs	1 x 2 GB	1 x 1 + 1 x 2 GB
Memory slotsKnown for one	Unknown — not stated by the source	4x DIMM
Memory clock speed	1333 MHz	1333 MHz
Memory channels	Dual-channel	Dual-channel
Storage2 differ
Total storage capacityDiffers	320 GB	500 GB
Optical drive type	DVD-RW	DVD-RW
Number of HDDs installed	1	1
HDD capacityDiffers	320 GB	500 GB
HDD interface	SATA	SATA
HDD speed	7200 RPM	7200 RPM
HDD sizeKnown for one	Unknown — not stated by the source	3.5"
Card reader integrated	No	No
Floppy drive installedKnown for one	Unknown — not stated by the source	No
RAID levelsKnown for one	Unknown — not stated by the source	0, 1
Graphics2 differ
On-board graphics card	Yes	Yes
Discrete graphics card model	Not available	Not available
On-board graphics card family	Intel® HD Graphics	Intel® HD Graphics
On-board graphics card modelDiffers	Intel® HD Graphics 2000	Intel® HD Graphics
Number of displays supported (on-board graphics)	2	2
On-board graphics card base frequencyDiffers	850 MHz	733 MHz
Graphics card family	Intel	Intel
On-board graphics card dynamic frequency (max)Known for one	1100 MHz	Unknown — not stated by the source
On-board graphics card IDKnown for one	0x102	Unknown — not stated by the source
Performance1 differ
Product type	PC	PC
Motherboard chipsetDiffers	Intel® Q65 Express	Intel® Q57
Optical driveidentical
LightScribeKnown for one	Unknown — not stated by the source	No
Networkidentical
Ethernet LAN	Yes	Yes
Ethernet LAN data rates	10,100,1000 Mbit/s	10,100,1000 Mbit/s
Cabling technologyKnown for one	Unknown — not stated by the source	10/100/1000Base-T(X)
Wi-Fi	No	No
Wake-on-LAN readyKnown for one	Unknown — not stated by the source	Yes
Networking featuresKnown for one	Unknown — not stated by the source	Gigabit Ethernet
Ports & interfacesidentical
USB 2.0 ports quantity	8	8
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityKnown for one	Unknown — not stated by the source	0
DisplayPorts quantity	1	1
HDMI ports quantityKnown for one	Unknown — not stated by the source	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 quantityKnown for one	Unknown — not stated by the source	0
Firewire (IEEE 1394) portsKnown for one	Unknown — not stated by the source	0
Serial ports quantity	1	1
Parallel ports quantityKnown for one	Unknown — not stated by the source	0
Expansion slotsidentical
Number of 3.5" baysKnown for one	Unknown — not stated by the source	2
PCI Express x16 slotsKnown for one	Unknown — not stated by the source	1
PCI slotsKnown for one	Unknown — not stated by the source	1
Power1 differ
Power supply typeKnown for one	Unknown — not stated by the source	AC/DC
Power supplyDiffers	280 W	240 W
Design1 differ
Chassis typeDiffers	Tower	SFF
Number of 5.25" baysKnown for one	Unknown — not stated by the source	1
Cable lock slotKnown for one	Unknown — not stated by the source	Yes
Cable lock slot typeKnown for one	Unknown — not stated by the source	Kensington
Product colour	Black	Black
External drive baysKnown for one	Unknown — not stated by the source	1 x 5.25", 1 x 3.5"
Internal drive baysKnown for one	Unknown — not stated by the source	1 x 3.5"
Software1 differ
Operating system installed	Windows 7 Professional	Windows 7 Professional
Operating system architectureDiffers	64-bit	32-bit
Mac compatibilityKnown for one	Unknown — not stated by the source	No
Display1 differ
Display includedDiffers	Yes	No
Display diagonalKnown for one	55.9 cm (22")	Unknown — not stated by the source
Display resolutionKnown for one	1680 x 1050 pixels	Unknown — not stated by the source
Contrast ratio (typical)Known for one	1000:1	Unknown — not stated by the source
Display brightnessKnown for one	250 cd/m²	Unknown — not stated by the source
Viewing angle, horizontalKnown for one	170°	Unknown — not stated by the source
Viewing angle, verticalKnown for one	160°	Unknown — not stated by the source
Processor special features12 differ
CPU configuration (max)	1	1
Embedded options available	No	No
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	Yes	Yes
Intel Enhanced Halt State	Yes	Yes
Intel FDI Technology	Yes	Yes
Intel Fast Memory AccessDiffers	Yes	No
Intel Flex Memory AccessDiffers	Yes	No
Intel Rapid Storage Technology	No	No
Intel Trusted Execution TechnologyDiffers	No	Yes
Intel VT-x with Extended Page Tables (EPT)	Yes	Yes
Intel Virtualization Technology (VT-x)	Yes	Yes
Intel Virtualization Technology for Directed I/O (VT-d)Differs	No	Yes
Intel® AES New Instructions (Intel® AES-NI)Differs	No	Yes
Intel® Clear Video HD Technology (Intel® CVT HD)	Yes	Yes
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)	No	No
Intel® InTru™ 3D TechnologyDiffers	Yes	No
Intel® Insider™Differs	Yes	No
Intel® Wireless Display (Intel® WiDi)	No	No
Physical Address Extension (PAE)Known for one	Unknown — not stated by the source	36 bit
Processor ARK IDDiffers	53422	43546
Processor package size	37.5 x 37.5 mm	37.5 x 37.5 mm
Supported instruction setsDiffers	AVX	SSE4.2
Thermal Monitoring TechnologiesDiffers	Yes	No
Intel® Turbo Boost TechnologyDiffers	No	1.0
Intel® Hyper Threading Technology (Intel® HT Technology)	Yes	Yes
Intel® Quick Sync Video TechnologyDiffers	Yes	No
Intel® My WiFi Technology (Intel® MWT)	No	No
Intel® Anti-Theft Technology (Intel® AT)	No	No
Conflict-Free processor	No	No
Intel Identity Protection Technology versionKnown for one	1.00	Unknown — not stated by the source
Intel® Identity Protection Technology (Intel® IPT)Known for one	Yes	Unknown — not stated by the source
Audio1 differ
Audio systemDiffers	High Definition Audio	HD
Weight & dimensions3 differ
WidthDiffers	175 mm	317 mm
DepthDiffers	442 mm	355 mm
HeightDiffers	414 mm	99 mm
WeightKnown for one	11 kg	Unknown — not stated by the source
Certificatesidentical
Compliance industry standardsKnown for one	Unknown — not stated by the source	IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Other featuresidentical
Security featuresKnown for one	Unknown — not stated by the source	TPM 1.2
Intel segment tagging	Enterprise, Professional	Enterprise, Professional

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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