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Differences What are the advantages of each

Front view of Intel Xeon E3-1278L v4

Reasons to consider the
Intel Xeon E3-1278L v4

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Much higher GPU clock speed 800 MHz vs 350 MHz More than 2.2x higher GPU clock speed
Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 38.19W vs 71.5W More than 45% lower typical power consumption
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much lower annual home energy cost 11.32 $/year vs 21.2 $/year More than 45% lower annual home energy cost
Much lower annual commercial energy cost 41.17 $/year vs 77.09 $/year More than 45% lower annual commercial energy cost
Newer Apr, 2015 vs Apr, 2014 Release date a year later
Front view of Intel Core i7 4790K

Reasons to consider the
Intel Core i7 4790K

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Much higher clock speed 4 GHz vs 2 GHz 2x higher clock speed
Significantly higher turbo clock speed 4.4 GHz vs 3.3 GHz Around 35% higher turbo clock speed
Much better turbo clock speed 1,250 MHz vs 1,000 MHz 25% better turbo clock speed
Much better overclocked clock speed (Air) 4.63 GHz vs 2 GHz More than 2.2x better overclocked clock speed (Air)
Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Much better overclocked clock speed (Water) 4.8 GHz vs 2 GHz Around 2.5x better overclocked clock speed (Water)

Features Key features of the Xeon E3-1278L v4  vs Core i7 4790K 

clock speed

turbo clock speed

L3 cache

gpu clock speed

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Xeon E3-1278L v4  vs
Core i7 4790K 
Clock speed 2 GHz 4 GHz
Turbo clock speed 3.3 GHz 4.4 GHz
Cores Quad core Quad core

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
F16C
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
FMA3
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 47W 88W
Annual home energy cost 11.32 $/year 21.2 $/year
Annual commercial energy cost 41.17 $/year 77.09 $/year
Typical power consumption 38.19W 71.5W

bus

Architecture DMI DMI 2.0
Number of links 1 0
Transfer rate 5,000 MT/s 5,000 MT/s

details

Xeon E3-1278L v4  vs
Core i7 4790K 
Architecture x86-64 x86-64
Threads 8 8
L3 cache 6 MB 8 MB
L3 cache per core 1.5 MB/core 2 MB/core
Manufacture process 14 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2 GHz 4.63 GHz
Overclocked clock speed (Water) 2 GHz 4.8 GHz
Overclocked clock speed (Air) 2 GHz 4.63 GHz

integrated graphics

GPU GPU GPU
Label Intel® Iris™ Pro Graphics P6300 Intel® HD Graphics 4600
Number of displays supported 3 3
GPU clock speed 800 MHz 350 MHz
Turbo clock speed 1,000 MHz 1,250 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3L-1600
DDR3-1333
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 12,800 MB/s 25,600 MB/s
Maximum memory size 32,768 MB 32,768 MB
Intel Xeon E3-1278L v4
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Intel Core i7 4790K
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