Product comparison · 2 laptops

Lenovo IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO vs Lenovo ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP

26specifications compared
12differ
14identical
6known for one product only

Key differences

The Lenovo ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP has 0.2 GHz more processor frequency than the Lenovo IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO (1.6 GHz vs 1.4 GHz). The Lenovo ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP has 20 GB more total storage capacity than the Lenovo IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO (60 GB vs 40 GB). The Lenovo IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO has 3.5 h more battery life (max) than the Lenovo ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP (7.5 h vs 4 h). Display diagonal: 30.7 cm (12.1") on the Lenovo IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO, 38.1 cm (15") on the Lenovo ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP. Graphics card interface: Direct AGP on the Lenovo IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO, AGP 4X on the Lenovo ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP.

Display diagonal
- IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO:30.7 cm (12.1")
- ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP:38.1 cm (15")
Processor frequency
- IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO:1.4 GHz
- ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP:1.6 GHz
Total storage capacity
- IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO:40 GB
- ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP:60 GB
Graphics card interface
- IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO:Direct AGP
- ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP:AGP 4X
Battery life (max)
- IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO:7.5 h
- ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP:4 h
Weight
- IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO:1.24 kg
- ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP:2.6 kg
Width
- IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO:268 mm
- ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP:314 mm
Depth
- IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO:211 mm
- ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP:260 mm

Side by side

Differences highlightedShow differences only

Comparison of IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO, ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP
32 specifications	A Lenovo IBM THINKPAD X40 P M-1.4 (738) 512M/40G/12.1/INTEL 80211.WXP US EURO View product	B Lenovo ThinkPad R51 PM-725 512MB 60GB 15.0 inch TFT Centrino 11b/g COMBO WXP View product
Display1 differ
Display diagonalDiffers	30.7 cm (12.1")	38.1 cm (15")
Processor1 differ
Processor frequencyDiffers	1.4 GHz	1.6 GHz
Memoryidentical
Internal memory typeKnown for one	DDR-SDRAM	Unknown — not stated by the source
Storage1 differ
Total storage capacityDiffers	40 GB	60 GB
Graphics1 differ
Discrete graphics cardKnown for one	Unknown — not stated by the source	Yes
Discrete graphics card modelKnown for one	Unknown — not stated by the source	AMD Mobility Radeon 7500
Maximum graphics card memoryKnown for one	Unknown — not stated by the source	0.032 GB
Graphics card interfaceDiffers	Direct AGP	AGP 4X
Audioidentical
Number of built-in speakersKnown for one	Unknown — not stated by the source	2
Network1 differ
Networking featuresDiffers	Ethernet/Fast Ethernet/Gigabit Ethernet/IEEE 802.11b/IEEE 802.11g	Ethernet/Fast Ethernet/Gigabit Ethernet/IEEE 802.11b/IEEE 802.11g/Bluetooth
Ports & interfaces1 differ
I/O portsDiffers	-AC adapter -Expansion bus (for X4 UltraBase Dock) -External microphone -External Display -Headphone/Line out -Infrared -RJ-11 -RJ-45 -2 Universal Serial Bus (USB)	-AC adapter -Expansion Bus port (for Dock II/Mini Dock or Port Replicator II) -External microphone -External Display -Headphone/Line out -Infrared -Parallel -RJ-11 -RJ-45 -S-Video out -2 USB 2.0
Softwareidentical
Bundled softwareKnown for one	Access IBM, IBM Access Connections, IBM Rescue and Recovery with Rapid Restore, IBM Update Connector, Norton AntiVirus 2004 OEM Version, Norton AntiVirus 2004 with 90 days of virus definition upgrades, PC Doctor diagnostics, Adobe Acrobat Reader	Unknown — not stated by the source
Battery1 differ
Battery life (max)Differs	7.5 h	4 h
Weight & dimensions4 differ
WeightDiffers	1.24 kg	2.6 kg
WidthDiffers	268 mm	314 mm
DepthDiffers	211 mm	260 mm
Dimensions (WxDxH)Differs	268 x 211 x 27 mm	314 x 260 x 37 mm
Other features1 differ
Battery typeDiffers	8 Cell Lithium-Ion	6 Cell Lithium-Ion

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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