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Differences What are the advantages of each

Front view of Intel Core i7 4790T

Reasons to consider the
Intel Core i7 4790T

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Much lower typical power consumption 36.56W vs 71.5W Around 50% lower typical power consumption
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much lower annual home energy cost 10.84 $/year vs 21.2 $/year Around 50% lower annual home energy cost
Much lower annual commercial energy cost 39.42 $/year vs 77.09 $/year Around 50% lower annual commercial energy cost
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 2.7 GHz Around 50% higher clock speed
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Higher Maximum operating temperature 74.04 °C vs 71.45 °C Around 5% higher Maximum operating temperature

Benchmarks Real world tests of Core i7 4790T vs 4790K

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core i7 4790T
15.06 mHash/s
Core i7 4790K
16.1 mHash/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Core i7 4790T
1.03 fps
Core i7 4790K
1.79 fps

PCMark 8 Home 3.0 Accelerated Data courtesy FutureMark

Sky Diver Data courtesy FutureMark

Cloud Gate Data courtesy FutureMark

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 4790T
4,100,000 MB/s
Core i7 4790K
5,140,000 MB/s

Specifications Full list of technical specs

summary

Core i7 4790T  vs
4790K 
Clock speed 2.7 GHz 4 GHz
Turbo clock speed 3.9 GHz 4.4 GHz
Cores Quad core Quad core
Is unlocked No Yes

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
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3L-1600
DDR3-1333
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 32,768 MB 32,768 MB

details

Core i7 4790T  vs
4790K 
Architecture x86-64 x86-64
Threads 8 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 1 1
Operating temperature Unknown - 71.45°C Unknown - 74.04°C

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 4600 Intel® HD Graphics 4600
Number of displays supported 3 3
GPU clock speed 350 MHz 350 MHz
Turbo clock speed 1,200 MHz 1,250 MHz

power consumption

TDP 45W 88W
Annual home energy cost 10.84 $/year 21.2 $/year
Annual commercial energy cost 39.42 $/year 77.09 $/year
Performance per watt 18.65 pt/W 11.42 pt/W
Typical power consumption 36.56W 71.5W

bus

Architecture DMI 2.0 DMI 2.0
Number of links 0 0
Transfer rate 5,000 MT/s 5,000 MT/s
Intel Core i7 4790T
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Intel Core i7 4790K
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