A6-6400K vs Ryzen Threadripper PRO 5955WX

Place in the ranking	131	2499
Place by popularity	not in top-100	not in top-100
Market segment	Server	Desktop processor
Series	AMD Ryzen Threadripper	AMD A-Series (Desktop)
Power efficiency	10.66	1.38
Architecture codename	Chagall PRO (2022)	Richland (2013−2014)
Release date	8 March 2022 (2 years ago)	1 June 2013 (11 years ago)

Detailed specifications

Ryzen Threadripper PRO 5955WX 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	16 (Hexadeca-Core)	2 (Dual-core)
Threads	32	2
Base clock speed	4 GHz	3.9 GHz
Boost clock speed	4.5 GHz	4.1 GHz
Multiplier	40	no data
L1 cache	1 MB	96 KB
L2 cache	8 MB	1024 KB
L3 cache	64 MB	0 KB
Chip lithography	7 nm	32 nm
Die size	4x 81 mm²	246 mm²
Maximum core temperature	no data	70 °C
Maximum case temperature (TCase)	95 °C	70 °C
Number of transistors	16,600 million	1,178 million
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	-	+

Compatibility

Information on Ryzen Threadripper PRO 5955WX 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	WRX8	FM2
Power consumption (TDP)	280 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen Threadripper PRO 5955WX 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 Ryzen Threadripper PRO 5955WX and A6-6400K are enumerated here.

AMD-V	+	+
IOMMU 2.0	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen Threadripper PRO 5955WX and A6-6400K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR3-1866
Maximum memory size	2 TiB	no data
Max memory channels	no data	2
Maximum memory bandwidth	204.8 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	-	AMD Radeon HD 8470D
Number of pipelines	-	192
Enduro	-	+
Switchable graphics	-	+
UVD	-	+
VCE	-	+

Graphics interfaces

Available interfaces and connections of Ryzen Threadripper PRO 5955WX and A6-6400K integrated GPUs.

DisplayPort	-	+
HDMI	-	+

Graphics API support

APIs supported by Ryzen Threadripper PRO 5955WX and A6-6400K integrated GPUs, sometimes API versions are included.

DirectX

DirectX® 11

Peripherals

Specifications and connection of peripherals supported by Ryzen Threadripper PRO 5955WX and A6-6400K.

PCIe version	4.0	2.0
PCI Express lanes	128	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.

Ryzen Threadripper PRO 5955WX 32.60
+3227%

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.

Ryzen Threadripper PRO 5955WX 50096
+3231%

A6-6400K 1504

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Ryzen Threadripper PRO 5955WX 2138
+421%

A6-6400K 410

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Ryzen Threadripper PRO 5955WX 16079
+2691%

A6-6400K 576

Gaming performance

Pros & cons summary

Performance score	32.60	0.98
Recency	8 March 2022	1 June 2013
Physical cores	16	2
Threads	32	2
Chip lithography	7 nm	32 nm
Power consumption (TDP)	280 Watt	65 Watt

Ryzen Threadripper PRO 5955WX has a 3226.5% higher aggregate performance score, an age advantage of 8 years, 700% more physical cores and 1500% more threads, and a 357.1% more advanced lithography process.

A6-6400K, on the other hand, has 330.8% lower power consumption.

The Ryzen Threadripper PRO 5955WX is our recommended choice as it beats the A6-6400K in performance tests.

Be aware that Ryzen Threadripper PRO 5955WX is a server/workstation processor while A6-6400K is a desktop one.

Should you still have questions on choice between Ryzen Threadripper PRO 5955WX and A6-6400K, ask them in Comments section, and we shall answer.