Intel Xeon E3-1275 v3 vs Intel Xeon E5-4603

Physical Specifications

Socket Intel Socket 1150 Intel Socket 2011
Foundry Intel Intel
Process size 22 nm 32 nm
Transistors 1,400 million 1,270 million
Die size 160 mm² 294 mm²
Package FC-LGA12C FC-LGA10


Frequency 3.5 GHz 2000 MHz
Turbo clock up to 3.9 GHz
Base clock 100 MHz 100 MHz
Multiplier 35.0x 20.0x
Multiplier unlocked No No
TDP 84 W 95 W
Voltage 1.35 V

Architecture Details

Vertical Segment Server/Workstation Server/Workstation
Production status unknown unknown
Release date Jun 2nd, 2013 May 14th, 2012
Codename Haswell-WS Sandy Bridge-EP
Generation Xeon E3 Xeon E5
Part SR14S SR0LF
Memory support DDR3, DDR4 Dual-channel DDR3 Quad-channel
ECC memory Yes Yes
PCI Express Gen 3 Gen 3


Total Cores 4 4
Total Threads 8 8
SMP # CPUs 1 4
Integrated graphics Intel HD P4600


Cache L1 64K (per core) 64K (per core)
Cache L2 256K (per core) 256K (per core)
Cache L3 8MB (shared) 10MB (shared)

Features & Technologies

8.0GT/s QPI Yes
AES-NI Yes Yes
AVX Yes Yes
AVX2 Yes
BMI1 Yes
BMI2 Yes
EIST Yes Yes
F16C Yes
FMA3 Yes
HTT Yes Yes
Intel 64 Yes Yes
MMX Yes Yes
SSE Yes Yes
SSE2 Yes Yes
SSE3 Yes Yes
SSE4.2 Yes Yes
SSSE3 Yes Yes
TXT Yes Yes
VT-d Yes Yes
VT-x Yes Yes
XD bit Yes Yes
vPro Yes
x8 SDDC Yes


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