A6-6400K vs FX-770K

Place in the ranking	1971	2497
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Series	no data	AMD A-Series (Desktop)
Power efficiency	2.74	1.37
Architecture codename	Kaveri (2014−2015)	Richland (2013−2014)
Release date	December 2014 (9 years ago)	1 June 2013 (11 years ago)

Detailed specifications

FX-770K and A6-6400K 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)	2 (Dual-core)
Threads	4	2
Base clock speed	3.5 GHz	3.9 GHz
Boost clock speed	3.9 GHz	4.1 GHz
L1 cache	256K	96 KB
L2 cache	4 MB	1024 KB
L3 cache	no data	0 KB
Chip lithography	28 nm	32 nm
Die size	245 mm²	246 mm²
Maximum core temperature	no data	70 °C
Maximum case temperature (TCase)	72 °C	70 °C
Number of transistors	2,411 million	1,178 million
64 bit support	+	+
Windows 11 compatibility	no data	-
Unlocked multiplier	+	+

Compatibility

Information on FX-770K and A6-6400K 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	1
Socket	FM2+	FM2
Power consumption (TDP)	65 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by FX-770K and A6-6400K. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	MMX, SSE1-4a, AES, ABM, AVX, BMI1, AMD64, VT, EVP, Turbo Core 3.0
AES-NI	+	+
FMA	+	FMA4
AVX	+	+
PowerNow	-	+
PowerGating	-	+
VirusProtect	-	+

Virtualization technologies

Virtual machine speed-up technologies supported by FX-770K and A6-6400K are enumerated here.

AMD-V	+	+
IOMMU 2.0	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by FX-770K and A6-6400K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3-2133	DDR3-1866
Max memory channels	no data	2

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	AMD Radeon HD 8470D
Number of pipelines	no data	192
Enduro	-	+
Switchable graphics	-	+
UVD	-	+
VCE	-	+

Graphics interfaces

Available interfaces and connections of FX-770K and A6-6400K integrated GPUs.

DisplayPort	-	+
HDMI	-	+

Graphics API support

APIs supported by FX-770K and A6-6400K integrated GPUs, sometimes API versions are included.

DirectX

no data

DirectX® 11

Peripherals

Specifications and connection of peripherals supported by FX-770K and A6-6400K.

PCIe version	3.0	2.0
PCI Express lanes	16	no data

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.

FX-770K 1.95
+99%

A6-6400K 0.98

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.

FX-770K 2978
+98%

A6-6400K 1504