i5-4440S vs i5-6600K

Place in the ranking	1429	1701
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.83	0.39
Market segment	Desktop processor	Desktop processor
Series	Intel Core i5 (Desktop)	no data
Power efficiency	4.12	3.97
Architecture codename	Skylake (2015−2016)	Haswell (2013−2015)
Release date	5 August 2015 (9 years ago)	1 September 2013 (11 years ago)
Launch price (MSRP)	$242	$239

Cost-effectiveness evaluation

Performance per price, higher is better.

i5-6600K has 113% better value for money than i5-4440S.

Detailed specifications

Core i5-6600K and Core i5-4440S basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	4 (Quad-Core)	4 (Quad-Core)
Threads	4	4
Base clock speed	3.5 GHz	2.8 GHz
Boost clock speed	3.9 GHz	3.3 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	5 GT/s
Multiplier	35	no data
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	6 MB (shared)	6 MB (shared)
Chip lithography	14 nm	22 nm
Die size	122 mm²	177 mm²
Maximum case temperature (TCase)	64 °C	72 °C
Number of transistors	no data	1,400 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-

Compatibility

Information on Core i5-6600K and Core i5-4440S compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1 (Uniprocessor)	1
Socket	FCLGA1151	FCLGA1150
Power consumption (TDP)	91 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-6600K and Core i5-4440S. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
My WiFi	no data	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	-	-
TSX	+	-
Idle States	+	+
Thermal Monitoring	+	+
FDI	no data	+

Security technologies

Core i5-6600K and Core i5-4440S technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	-
EDB	+	+
Secure Key	+	+
MPX	+	-
Identity Protection	+	+
SGX	Yes with Intel® ME	no data
OS Guard	+	+
Anti-Theft	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-6600K and Core i5-4440S are enumerated here.

AMD-V	+	-
VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-6600K and Core i5-4440S. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3, DDR4	DDR3
Maximum memory size	64 GB	32 GB
Max memory channels	2	2
Maximum memory bandwidth	34.134 GB/s	25.6 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel HD Graphics 530	Intel HD Graphics 4600
Max video memory	64 GB	2 GB
Quick Sync Video	+	+
Clear Video	+	no data
Clear Video HD	+	+
Graphics max frequency	1.15 GHz	1.1 GHz
InTru 3D	+	+

Graphics interfaces

Available interfaces and connections of Core i5-6600K and Core i5-4440S integrated GPUs.

Number of displays supported	3	3
eDP	+	+
DisplayPort	+	+
HDMI	+	+
DVI	+	no data
VGA	no data	+

Graphics image quality

Maximum display resolutions supported by Core i5-6600K and Core i5-4440S integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096x2304@24Hz	4096x2304@24Hz
Max resolution over eDP	4096x2304@60Hz	3840x2160@60Hz
Max resolution over DisplayPort	4096x2304@60Hz	3840x2160@60Hz
Max resolution over VGA	N/A	1920x1200@60Hz

Graphics API support

APIs supported by Core i5-6600K and Core i5-4440S integrated GPUs, sometimes API versions are included.

DirectX	12	11.2/12
OpenGL	4.5	4.3

Peripherals

Specifications and connection of peripherals supported by Core i5-6600K and Core i5-4440S.

PCIe version	3.0	Up to 3.0
PCI Express lanes	16	16

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

i5-6600K 3.98
+45.3%

i5-4440S 2.74

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i5-6600K 6319
+45.2%

i5-4440S 4351

Gaming performance

Pros & cons summary

Performance score	3.98	2.74
Integrated graphics card	2.60	1.84
Recency	5 August 2015	1 September 2013
Chip lithography	14 nm	22 nm
Power consumption (TDP)	91 Watt	65 Watt

i5-6600K has a 45.3% higher aggregate performance score, 41.3% faster integrated GPU, an age advantage of 1 year, and a 57.1% more advanced lithography process.

i5-4440S, on the other hand, has 40% lower power consumption.

The Core i5-6600K is our recommended choice as it beats the Core i5-4440S in performance tests.

Should you still have questions on choice between Core i5-6600K and Core i5-4440S, ask them in Comments section, and we shall answer.