Product comparison · 2 pcs/workstations

Dell 790 DT vs Dell OptiPlex 990 DT

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  • 135specifications compared
  • 23differ
  • 112identical
  • 3known for one product only

Key differences

The Dell OptiPlex 990 DT has 2 more processor cores than the Dell 790 DT (4 vs 2). The Dell OptiPlex 990 DT has 0.2 GHz more processor frequency than the Dell 790 DT (3.3 GHz vs 3.1 GHz). The Dell OptiPlex 990 DT has 3 MB more processor cache than the Dell 790 DT (6 MB vs 3 MB). Only the Dell OptiPlex 990 DT has Intel Trusted Execution Technology. Only the Dell OptiPlex 990 DT has Intel Virtualization Technology for Directed I/O (VT-d).

  • Processor family
    • 790 DT:Intel® Core™ i3
    • OptiPlex 990 DT:Intel® Core™ i5
  • Processor generation
    • 790 DT:2nd gen Intel® Core™ i3
    • OptiPlex 990 DT:2nd gen Intel® Core™ i5
  • Processor model
    • 790 DT:i3-2100
    • OptiPlex 990 DT:i5-2500
  • Processor cores
    • 790 DT:2
    • OptiPlex 990 DT:4
  • Processor frequency
    • 790 DT:3.1 GHz
    • OptiPlex 990 DT:3.3 GHz
  • Processor cache
    • 790 DT:3 MB
    • OptiPlex 990 DT:6 MB
  • Thermal Design Power (TDP)
    • 790 DT:35, 65
    • OptiPlex 990 DT:95 W
  • Tcase
    • 790 DT:69.1 °C
    • OptiPlex 990 DT:72.6 °C

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Comparison of 790 DT, OptiPlex 990 DT
138 specifications
Processor10 differ
Processor manufacturerIntelIntel
Processor familyDiffersIntel® Core™ i3Intel® Core™ i5
Processor generationDiffers2nd gen Intel® Core™ i32nd gen Intel® Core™ i5
Processor modelDiffersi3-2100i5-2500
Processor coresDiffers24
Processor threads44
Processor frequencyDiffers3.1 GHz3.3 GHz
Processor cacheDiffers3 MB6 MB
Processor cache typeSmart CacheSmart Cache
Bus typeDMIDMI
FSB ParityNoNo
System bus rate5 GT/s5 GT/s
Processor lithography32 nm32 nm
Processor operating modes64-bit64-bit
Processor seriesDiffersIntel Core i3-2100 Desktop SeriesIntel Core i5-2500 Desktop Series
Processor codenameSandy BridgeSandy Bridge
Thermal Design Power (TDP)Differs35, 6595 W
TcaseDiffers69.1 °C72.6 °C
Maximum number of PCI Express lanes1616
PCI Express slots version2.02.0
Number of processors installed11
Processor socketLGA 1155 (Socket H2)LGA 1155 (Socket H2)
CPU multiplier (bus/core ratio)3131
Maximum number of SMP processors11
PlatformPCPC
SteppingDiffersQ0D2
Maximum internal memory supported by processor32 GB32 GB
Memory types supported by processorDDR3-SDRAMDDR3-SDRAM
Memory clock speeds supported by processor1066,1333 MHz1066,1333 MHz
Memory bandwidth supported by processor (max)21 GB/s21 GB/s
ECC supported by processorNoNo
Processor boost frequencyKnown for oneUnknown — not stated by the source3.7 GHz
Memory2 differ
Internal memoryDiffers2 GB8 GB
Maximum internal memory16 GB16 GB
Internal memory typeDDR3-SDRAMDDR3-SDRAM
Memory layout (slots x size)Differs1 x 2 GB2 x 4 GB
Memory slots4x DIMM4x DIMM
Memory clock speed1333 MHz1333 MHz
Memory channelsDual-channelDual-channel
Storage2 differ
Total storage capacityDiffers250 GB1 TB
Optical drive typeDVD-RWDVD-RW
Number of HDDs installed11
HDD capacityKnown for one250 GBUnknown — not stated by the source
HDD interfaceDiffersSATASATA II
HDD speed7200 RPM7200 RPM
HDD size3.5"3.5"
Card reader integratedNoNo
Floppy drive installedNoNo
Graphics1 differ
On-board graphics cardYesYes
Discrete graphics card modelDiffersNot availableIntel® HD Graphics 2000
On-board graphics card familyIntel® HD GraphicsIntel® HD Graphics
On-board graphics card modelIntel® HD Graphics 2000Intel® HD Graphics 2000
Number of displays supported (on-board graphics)22
On-board graphics card base frequency850 MHz850 MHz
On-board graphics card dynamic frequency (max)1100 MHz1100 MHz
On-board graphics card ID0x1020x102
Graphics card familyIntelIntel
Performance1 differ
Product typePCPC
Motherboard chipsetDiffersIntel® Q65 ExpressIntel® Q67 Express
Password protection typeBIOSBIOS
Networkidentical
Ethernet LANYesYes
Ethernet LAN data rates10,100,1000 Mbit/s10,100,1000 Mbit/s
Cabling technology10/100/1000Base-T(X)10/100/1000Base-T(X)
Wi-FiNoNo
Wake-on-LAN readyYesYes
Networking featuresGigabit EthernetGigabit Ethernet
Ports & interfacesidentical
USB 2.0 ports quantity1010
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity00
DisplayPorts quantity11
HDMI ports quantity00
Ethernet LAN (RJ-45) ports11
Headphone outputs11
Line-outYesYes
Line-inYesYes
Microphone inYesYes
VGA (D-Sub) ports quantity11
DVI portNoNo
PS/2 ports quantity22
Firewire (IEEE 1394) ports00
Serial ports quantity11
Parallel ports quantity00
Expansion slotsidentical
Number of 3.5" bays11
PCI Express x1 slots11
PCI Express x16 slots22
PCI slots11
Poweridentical
Power supply typeAC/DCAC/DC
Power supply250 W250 W
Designidentical
Chassis typeDesktopDesktop
Number of 5.25" bays11
Cable lock slotKnown for oneYesUnknown — not stated by the source
Product colourBlack, SilverBlack, Silver
Softwareidentical
Operating system installedWindows 7 ProfessionalWindows 7 Professional
Operating system architecture64-bit64-bit
Displayidentical
Display includedNoNo
Processor special features7 differ
CPU configuration (max)11
Embedded options availableNoNo
Enhanced Intel SpeedStep TechnologyYesYes
Execute Disable BitYesYes
Idle StatesYesYes
Intel 64YesYes
Intel Clear Video TechnologyNoNo
Intel Demand Based SwitchingNoNo
Intel Dual Display Capable TechnologyYesYes
Intel Enhanced Halt StateYesYes
Intel FDI TechnologyYesYes
Intel Fast Memory AccessYesYes
Intel Flex Memory AccessYesYes
Intel Identity Protection Technology version1.001.00
Intel Rapid Storage TechnologyNoNo
Intel Trusted Execution TechnologyDiffersNoYes
Intel VT-x with Extended Page Tables (EPT)YesYes
Intel Virtualization Technology (VT-x)YesYes
Intel Virtualization Technology for Directed I/O (VT-d)DiffersNoYes
Intel® AES New Instructions (Intel® AES-NI)DiffersNoYes
Intel® Clear Video HD Technology (Intel® CVT HD)YesYes
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)NoNo
Intel® InTru™ 3D TechnologyYesYes
Intel® Insider™YesYes
Intel® Wireless Display (Intel® WiDi)NoNo
Processor ARK IDDiffers5342252209
Processor package size37.5 x 37.5 mm37.5 x 37.5 mm
Supported instruction setsDiffersAVXAVX, SSE4.1, SSE4.2
Thermal Monitoring TechnologiesYesYes
Intel® Turbo Boost TechnologyDiffersNo2.0
Intel® Hyper Threading Technology (Intel® HT Technology)DiffersYesNo
Intel® Quick Sync Video TechnologyYesYes
Intel® My WiFi Technology (Intel® MWT)NoNo
Intel® Identity Protection Technology (Intel® IPT)YesYes
Intel® Anti-Theft Technology (Intel® AT)NoNo
Conflict-Free processorNoNo
Audioidentical
Audio systemHDHD
Weight & dimensionsidentical
Width102 mm102 mm
Depth410 mm410 mm
Height360 mm360 mm
Weight7.56 kg7.56 kg
Packaging contentidentical
Mouse includedNoNo
Keyboard includedNoNo
Certificatesidentical
Compliance industry standardsIEEE 802.3, IEEE 802.3u, IEEE 802.3abIEEE 802.3, IEEE 802.3u, IEEE 802.3ab

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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