Product comparison · 2 pcs/workstations

Dell 790 USFF vs Dell OptiPlex 990

112specifications compared
39differ
73identical
38known for one product only

Key differences

The Dell OptiPlex 990 has 2 more processor cores than the Dell 790 USFF (4 vs 2). The Dell OptiPlex 990 has 4 more processor threads than the Dell 790 USFF (8 vs 4). The Dell OptiPlex 990 has 0.1 GHz more processor frequency than the Dell 790 USFF (3.4 GHz vs 3.3 GHz). Only the Dell OptiPlex 990 has card reader integrated. Only the Dell OptiPlex 990 has Intel Trusted Execution Technology.

Processor family
- 790 USFF:Intel® Core™ i3
- OptiPlex 990:Intel® Core™ i7
Processor generation
- 790 USFF:2nd gen Intel® Core™ i3
- OptiPlex 990:2nd gen Intel® Core™ i7
Processor model
- 790 USFF:i3-2120
- OptiPlex 990:i7-2600
Processor cores
- 790 USFF:2
- OptiPlex 990:4
Processor threads
- 790 USFF:4
- OptiPlex 990:8
Processor frequency
- 790 USFF:3.3 GHz
- OptiPlex 990:3.4 GHz
Processor cache
- 790 USFF:3 MB
- OptiPlex 990:8 MB
Thermal Design Power (TDP)
- 790 USFF:65 W
- OptiPlex 990:95 W

Side by side

Differences highlightedShow differences only

Comparison of 790 USFF, OptiPlex 990
150 specifications	A Dell 790 USFF View product	B Dell OptiPlex 990 View product
Processor12 differ
Processor familyDiffers	Intel® Core™ i3	Intel® Core™ i7
Processor generationDiffers	2nd gen Intel® Core™ i3	2nd gen Intel® Core™ i7
Processor modelDiffers	i3-2120	i7-2600
Processor coresDiffers	2	4
Processor threadsDiffers	4	8
Processor boost frequencyKnown for one	Unknown — not stated by the source	3.8 GHz
Processor frequencyDiffers	3.3 GHz	3.4 GHz
Processor cacheDiffers	3 MB	8 MB
Processor seriesDiffers	Intel Core i3-2100 Desktop Series	Intel Core i7-2600 Desktop Series
Thermal Design Power (TDP)Differs	65 W	95 W
TcaseDiffers	69.1 °C	72.6 °C
CPU multiplier (bus/core ratio)Differs	33	34
SteppingKnown for one	Unknown — not stated by the source	D2
Memory types supported by processorDiffers	DDR3 1066/1333	DDR3-SDRAM
Memory clock speeds supported by processorKnown for one	Unknown — not stated by the source	1066,1333 MHz
Maximum number of SMP processorsKnown for one	1	Unknown — not stated by the source
Memory4 differ
Internal memoryDiffers	2 GB	4 GB
Maximum internal memoryDiffers	8 GB	16 GB
Memory layout (slots x size)Differs	1 x 2 GB	2 x 2 GB
Memory slotsDiffers	2x DIMM	4x DIMM
Storage5 differ
Total storage capacityDiffers	250 GB	500 GB
Optical drive typeDiffers	DVD±RW	DVD-RW
HDD capacityDiffers	250 GB	500 GB
HDD interfaceDiffers	SATA	SATA, SATA II
Card reader integratedDiffers	No	Yes
HDD sizeKnown for one	2.5"	Unknown — not stated by the source
Floppy drive installedKnown for one	No	Unknown — not stated by the source
Graphics1 differ
On-board graphics card dynamic frequency (max)Differs	1100 MHz	1350 MHz
Performance1 differ
Motherboard chipsetDiffers	Intel® Q65 Express	Intel® Q67 Express
Networkidentical
Networking featuresKnown for one	Unknown — not stated by the source	Gigabit Ethernet
Ethernet interface typeKnown for one	Gigabit Ethernet	Unknown — not stated by the source
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers	7	11
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityKnown for one	Unknown — not stated by the source	0
HDMI ports quantityKnown for one	Unknown — not stated by the source	0
Line-outKnown for one	Unknown — not stated by the source	Yes
Line-inKnown for one	Unknown — not stated by the source	Yes
DVI portKnown for one	Unknown — not stated by the source	No
PS/2 ports quantityKnown for one	Unknown — not stated by the source	2
Firewire (IEEE 1394) portsKnown for one	Unknown — not stated by the source	0
Serial ports quantityKnown for one	Unknown — not stated by the source	1
Parallel ports quantityKnown for one	Unknown — not stated by the source	0
Headphone connectivityKnown for one	3.5 mm	Unknown — not stated by the source
Microphone connectivityKnown for one	3.5 mm	Unknown — not stated by the source
Expansion slotsidentical
Number of 3.5" baysKnown for one	Unknown — not stated by the source	1
PCI Express x1 slotsKnown for one	Unknown — not stated by the source	1
PCI Express x16 slotsKnown for one	Unknown — not stated by the source	2
PCI slotsKnown for one	Unknown — not stated by the source	1
Mini PCI Express slotsKnown for one	1	Unknown — not stated by the source
Power1 differ
Power supplyDiffers	200 W	250 W
Design2 differ
Chassis typeDiffers	USFF	Desktop
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
Product colourDiffers	Black, Silver	Black
Placement supportedKnown for one	Horizontal/Vertical	Unknown — not stated by the source
Softwareidentical
Operating system architectureKnown for one	Unknown — not stated by the source	64-bit
Mac compatibilityKnown for one	No	Unknown — not stated by the source
Processor special features5 differ
Intel Trusted Execution TechnologyDiffers	No	Yes
Intel Virtualization Technology for Directed I/O (VT-d)Differs	No	Yes
Intel® AES New Instructions (Intel® AES-NI)Differs	No	Yes
Processor ARK IDDiffers	53426	52213
Processor codeKnown for one	Unknown — not stated by the source	SR00B
Intel® Turbo Boost TechnologyDiffers	No	2.0
Weight & dimensions4 differ
WidthDiffers	65 mm	102 mm
DepthDiffers	240 mm	410 mm
HeightDiffers	236.7 mm	360 mm
WeightDiffers	3.27 kg	7.56 kg
Packaging content2 differ
Mouse includedDiffers	Yes	No
Keyboard includedDiffers	Yes	No
Certificates1 differ
CertificationDiffers	CECP, TCO 3, WEEE, Japan Energy Law, Japan Green PC, South Korea Eco-label, EU RoHS, China RoHS, Blue Angel	CECP, TCO 05, WEEE
Other featuresidentical
Security featuresKnown for one	Unknown — not stated by the source	TPM
Audioidentical
Audio systemKnown for one	HDA	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	-40 - 60 °C	Unknown — not stated by the source
Relative humidityKnown for one	20 - 80%	Unknown — not stated by the source
Non-operating altitudeKnown for one	-15.2 - 10668 m	Unknown — not stated by the source
Packaging dataidentical
Package dimensions (WxDxH)Known for one	365.3 x 244.6 x 485.9 mm	Unknown — not stated by the source
Package weightKnown for one	4.34 kg	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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