Product comparison · 2 servers

Lenovo ThinkServer RD540 server vs Lenovo ThinkServer RD640 server

99specifications compared
17differ
82identical
12known for one product only

Key differences

Processor model
- ThinkServer RD540 server:E5-2620
- ThinkServer RD640 server:E5-2640
Processor frequency
- ThinkServer RD540 server:2 GHz
- ThinkServer RD640 server:2.5 GHz
Processor boost frequency
- ThinkServer RD540 server:2.5 GHz
- ThinkServer RD640 server:3 GHz
CPU multiplier (bus/core ratio)
- ThinkServer RD540 server:25
- ThinkServer RD640 server:30
Embedded options available
- ThinkServer RD540 server:Yes
- ThinkServer RD640 server:No
Memory clock speeds supported by processor
- ThinkServer RD540 server:800,1066,1333 MHz
- ThinkServer RD640 server:800,1066,1333,1600 MHz
Tcase
- ThinkServer RD540 server:77.4 °C
- ThinkServer RD640 server:73 °C
Number of HDDs supported
- ThinkServer RD540 server:4
- ThinkServer RD640 server:16

Side by side

Differences highlightedShow differences only

Comparison of RD540, RD640
111 specifications	A Lenovo ThinkServer RD540 server Model RD540 View product	B Lenovo ThinkServer RD640 server Model RD640 View product
Processor7 differ
Processor modelDiffers	E5-2620	E5-2640
Processor frequencyDiffers	2 GHz	2.5 GHz
Processor boost frequencyDiffers	2.5 GHz	3 GHz
Motherboard chipsetKnown for one	Unknown — not stated by the source	Intel® C602J
CPU multiplier (bus/core ratio)Differs	25	30
Embedded options availableDiffers	Yes	No
Memory clock speeds supported by processorDiffers	800,1066,1333 MHz	800,1066,1333,1600 MHz
TcaseDiffers	77.4 °C	73 °C
Storage3 differ
HDD interfaceDiffers	Serial ATA	Serial ATA, Serial Attached SCSI (SAS)
HDD sizeKnown for one	Unknown — not stated by the source	2.5"
Number of HDDs supportedDiffers	4	16
RAID levelsDiffers	0, 1, 5, 10	1, 5, 6, 10, 50, 60
Hot-swapKnown for one	Yes	Unknown — not stated by the source
Ports & interfaces2 differ
USB 2.0 ports quantityDiffers	2	6
VGA (D-Sub) ports quantityDiffers	1	2
Expansion slotsidentical
PCI Express x8 (Gen 3.x) slotsKnown for one	Unknown — not stated by the source	2
PCI Express x16 (Gen 3.x) slotsKnown for one	Unknown — not stated by the source	1
Design1 differ
Chassis typeDiffers	Rack (1U)	Rack (2U)
Performanceidentical
BIOS typeKnown for one	Unknown — not stated by the source	UEFI
Processor special features1 differ
Processor ARK IDDiffers	64594	64591
Operational conditionsidentical
Operating temperature (T-T)Known for one	Unknown — not stated by the source	10 - 35 °C
Storage temperature (T-T)Known for one	Unknown — not stated by the source	-40 - 70 °C
Operating relative humidity (H-H)Known for one	Unknown — not stated by the source	8 - 80%
Storage relative humidity (H-H)Known for one	Unknown — not stated by the source	8 - 90%
Operating altitudeKnown for one	Unknown — not stated by the source	0 - 3048 m
Sustainabilityidentical
Sustainability certificatesKnown for one	Unknown — not stated by the source	ENERGY STAR
Weight & dimensions3 differ
WidthDiffers	435.8 mm	441.9 mm
DepthDiffers	718.8 mm	87.3 mm
HeightDiffers	43.4 mm	720.5 mm

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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