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Essentials
Product Collection
Vertical Segment
Processor Number
Lithography
Product Collection
 Intel Atom® Processor C Series Intel® Xeon® D Processor
Vertical Segment
 Embedded Server
Processor Number
 C2538 D-1527
Lithography
 22 nm 14 nm
Product Collection
 Intel Atom® Processor C Series Intel® Xeon® D Processor
Vertical Segment
 Embedded Server
Processor Number
 C2538 D-1527
Lithography
 22 nm 14 nm
CPU Specifications
Total Cores
Total Threads
Processor Base Frequency
Cache
TDP
Max Turbo Frequency
Intel® Turbo Boost Technology 2.0 Frequency‡
Total Cores
 4 4
Total Threads
 4 8
Processor Base Frequency
 2.40 GHz 2.20 GHz
Cache
 2 MB 6 MB
TDP
 15 W 35 W
Max Turbo Frequency
 2.70 GHz
Intel® Turbo Boost Technology 2.0 Frequency‡
 2.70 GHz
Total Cores
 4 4
Total Threads
 4 8
Processor Base Frequency
 2.40 GHz 2.20 GHz
Cache
 2 MB 6 MB
TDP
 15 W 35 W
Max Turbo Frequency
 2.70 GHz
Intel® Turbo Boost Technology 2.0 Frequency‡
 2.70 GHz
Supplemental Information
Marketing Status
Launch Date
Servicing Status
End of Servicing Updates Date
Embedded Options Available
Use Conditions
Marketing Status
 Launched Discontinued
Launch Date
 Q3'13 Q4'15
Servicing Status
 End of Servicing Lifetime End of Servicing Updates
End of Servicing Updates Date
 Wednesday, June 30, 2021 Saturday, December 31, 2022
Embedded Options Available
 Yes Yes
Use Conditions
 Communications Communications
Marketing Status
 Launched Discontinued
Launch Date
 Q3'13 Q4'15
Servicing Status
 End of Servicing Lifetime End of Servicing Updates
End of Servicing Updates Date
 Wednesday, June 30, 2021 Saturday, December 31, 2022
Embedded Options Available
 Yes Yes
Use Conditions
 Communications Communications
Memory Specifications
Max Memory Size (dependent on memory type)
Memory Types
Max # of Memory Channels
Physical Address Extensions
ECC Memory Supported ‡
Maximum Memory Speed
Max Memory Size (dependent on memory type)
 64 GB 128 GB
Memory Types
 DDR3/DDR3L 1600 DDR4, DDR3
Max # of Memory Channels
 2 2
Physical Address Extensions
 36-bit
ECC Memory Supported ‡
 Yes Yes
Maximum Memory Speed
 2133 MHz
Max Memory Size (dependent on memory type)
 64 GB 128 GB
Memory Types
 DDR3/DDR3L 1600 DDR4, DDR3
Max # of Memory Channels
 2 2
Physical Address Extensions
 36-bit
ECC Memory Supported ‡
 Yes Yes
Maximum Memory Speed
 2133 MHz
Expansion Options
PCI Express Revision
PCI Express Configurations ‡
Max # of PCI Express Lanes
Scalability
PCI Express Revision
 2 2.0/3.0
PCI Express Configurations ‡
 x1,x2,x4,x8,x16 x4 x8 x16
Max # of PCI Express Lanes
 16 32
Scalability
 1S Only
PCI Express Revision
 2 2.0/3.0
PCI Express Configurations ‡
 x1,x2,x4,x8,x16 x4 x8 x16
Max # of PCI Express Lanes
 16 32
Scalability
 1S Only
I/O Specifications
# of USB Ports
USB Revision
Total # of SATA Ports
Integrated LAN
UART
Max # of SATA 6.0 Gb/s Ports
General Purpose IO
# of USB Ports
 4 8
USB Revision
 2 2.0/3.0
Total # of SATA Ports
 6 6
Integrated LAN
 4x1 or 4x2.5 GbE Yes
UART
 2 Interfaces Yes
Max # of SATA 6.0 Gb/s Ports
 2
General Purpose IO
 Yes
# of USB Ports
 4 8
USB Revision
 2 2.0/3.0
Total # of SATA Ports
 6 6
Integrated LAN
 4x1 or 4x2.5 GbE Yes
UART
 2 Interfaces Yes
Max # of SATA 6.0 Gb/s Ports
 2
General Purpose IO
 Yes
Package Specifications
Sockets Supported
Package Size
Max CPU Configuration
Sockets Supported
 FCBGA1283 FCBGA1667
Package Size
 34 mm x 28 mm 37.5mm x 37.5mm
Max CPU Configuration
 1
Sockets Supported
 FCBGA1283 FCBGA1667
Package Size
 34 mm x 28 mm 37.5mm x 37.5mm
Max CPU Configuration
 1
Advanced Technologies
Intel® Turbo Boost Technology ‡
Intel® Hyper-Threading Technology ‡
Intel® 64 ‡
Instruction Set
Integrated Intel® QuickAssist Technology
Intel® TSX-NI
Instruction Set Extensions
Idle States
Enhanced Intel SpeedStep® Technology
Thermal Monitoring Technologies
Intel® Turbo Boost Technology ‡
 No 2.0
Intel® Hyper-Threading Technology ‡
 No Yes
Intel® 64 ‡
 Yes Yes
Instruction Set
 64-bit 64-bit
Integrated Intel® QuickAssist Technology
 No
Intel® TSX-NI
 Yes
Instruction Set Extensions
 Intel® AVX2
Idle States
 Yes
Enhanced Intel SpeedStep® Technology
 Yes
Thermal Monitoring Technologies
 Yes
Intel® Turbo Boost Technology ‡
 No 2.0
Intel® Hyper-Threading Technology ‡
 No Yes
Intel® 64 ‡
 Yes Yes
Instruction Set
 64-bit 64-bit
Integrated Intel® QuickAssist Technology
 No
Intel® TSX-NI
 Yes
Instruction Set Extensions
 Intel® AVX2
Idle States
 Yes
Enhanced Intel SpeedStep® Technology
 Yes
Thermal Monitoring Technologies
 Yes
Security & Reliability
Intel® AES New Instructions
Execute Disable Bit ‡
Intel® Virtualization Technology (VT-x) ‡
Intel® VT-x with Extended Page Tables (EPT) ‡
Intel® Secure Key
Intel® Trusted Execution Technology ‡
Intel® OS Guard
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
Intel® AES New Instructions
 Yes Yes
Execute Disable Bit ‡
 Yes Yes
Intel® Virtualization Technology (VT-x) ‡
 Yes Yes
Intel® VT-x with Extended Page Tables (EPT) ‡
 Yes Yes
Intel® Secure Key
 Yes
Intel® Trusted Execution Technology ‡
 Yes
Intel® OS Guard
 Yes
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
 Yes
Intel® AES New Instructions
 Yes Yes
Execute Disable Bit ‡
 Yes Yes
Intel® Virtualization Technology (VT-x) ‡
 Yes Yes
Intel® VT-x with Extended Page Tables (EPT) ‡
 Yes Yes
Intel® Secure Key
 Yes
Intel® Trusted Execution Technology ‡
 Yes
Intel® OS Guard
 Yes
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
 Yes
Networking Specifications
Interfaces Supported
Interfaces Supported
 SFI, KR, KX, 1000Base-T, 10GBase-T
Interfaces Supported
 SFI, KR, KX, 1000Base-T, 10GBase-T
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