EPYC 7H12 vs Phenom II X4 840

Primary details

Comparing Phenom II X4 840 and EPYC 7H12 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2146	49
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.08	no data
Market segment	Desktop processor	Server
Series	no data	AMD EPYC
Power efficiency	1.51	14.82
Architecture codename	Propus (2009−2011)	Zen 2 (2017−2020)
Release date	4 January 2011 (13 years ago)	18 September 2019 (5 years ago)
Launch price (MSRP)	$90	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Phenom II X4 840 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	4 (Quad-Core)	64 (Tetrahexaconta-Core)
Threads	4	128
Base clock speed	3.2 GHz	2.6 GHz
Boost clock speed	3.2 GHz	3.3 GHz
Multiplier	no data	26
L1 cache	128 KB (per core)	96K (per core)
L2 cache	512 KB (per core)	512K (per core)
L3 cache	0 KB	256 MB (shared)
Chip lithography	45 nm	7 nm, 14 nm
Die size	169 mm2	192 mm2
Number of transistors	300 million	4,800 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Phenom II X4 840 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	1	2 (Multiprocessor)
Socket	AM3	TR4
Power consumption (TDP)	95 Watt	280 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Phenom II X4 840 and EPYC 7H12. You'll probably need this information if you require some particular technology.

AES-NI	-	+
AVX	-	+
Precision Boost 2	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom II X4 840 and EPYC 7H12 are enumerated here.

AMD-V

-

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X4 840 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	-	+

Peripherals

Specifications and connection of peripherals supported by Phenom II X4 840 and EPYC 7H12.

PCIe version

2.0

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.

---

Pros & cons summary

---

Performance score	1.52	43.84
Recency	4 January 2011	18 September 2019
Physical cores	4	64
Threads	4	128
Chip lithography	45 nm	7 nm
Power consumption (TDP)	95 Watt	280 Watt

---

Should you still have questions on choice between Phenom II X4 840 and EPYC 7H12, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---