EPYC 7H12 vs Phenom II X2 N640

Place in the ranking	2526	47
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Server
Series	2x AMD Phenom II	AMD EPYC
Power efficiency	2.44	14.82
Architecture codename	Champlain (2010−2011)	Zen 2 (2017−2020)
Release date	1 October 2010 (14 years ago)	18 September 2019 (5 years ago)

Detailed specifications

Phenom II X2 N640 and EPYC 7H12 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	2 (Dual-core)	64 (Tetrahexaconta-Core)
Threads	2	128
Base clock speed	no data	2.6 GHz
Boost clock speed	2.9 GHz	3.3 GHz
Bus rate	3600 MHz	no data
Multiplier	no data	26
L1 cache	256 KB	96K (per core)
L2 cache	2 MB	512K (per core)
L3 cache	no data	256 MB (shared)
Chip lithography	45 nm	7 nm, 14 nm
Die size	no data	192 mm²
Number of transistors	no data	4,800 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Phenom II X2 N640 and EPYC 7H12 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	no data	2 (Multiprocessor)
Socket	S1	TR4
Power consumption (TDP)	35 Watt	280 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Phenom II X2 N640 and EPYC 7H12. You'll probably need this information if you require some particular technology.

Instruction set extensions	HyperTransport 3.0, SSE4A, AMD64, Enhanced Virus Protection, Vurtualization	no data
AES-NI	-	+
AVX	-	+
VirusProtect	+	-
Precision Boost 2	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom II X2 N640 and EPYC 7H12 are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X2 N640 and EPYC 7H12. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4 Eight-channel
Maximum memory size	no data	4 TiB
Max memory channels	no data	8
Maximum memory bandwidth	no data	204.763 GB/s
ECC memory support	-	+

Gaming performance

Pros & cons summary

Performance score	0.92	44.67
Recency	1 October 2010	18 September 2019
Physical cores	2	64
Threads	2	128
Chip lithography	45 nm	7 nm
Power consumption (TDP)	35 Watt	280 Watt

Phenom II X2 N640 has 700% lower power consumption.

EPYC 7H12, on the other hand, has a 4755.4% higher aggregate performance score, an age advantage of 8 years, 3100% more physical cores and 6300% more threads, and a 542.9% more advanced lithography process.

The EPYC 7H12 is our recommended choice as it beats the Phenom II X2 N640 in performance tests.

Be aware that Phenom II X2 N640 is a notebook processor while EPYC 7H12 is a server/workstation one.

Should you still have questions on choice between Phenom II X2 N640 and EPYC 7H12, ask them in Comments section, and we shall answer.