EPYC 7H12 vs Core 2 Quad Q8400s

Primary details

Comparing Core 2 Quad Q8400s and EPYC 7H12 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	46
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Series	no data	AMD EPYC
Power efficiency	no data	14.82
Architecture codename	Yorkfield (2007−2009)	Zen 2 (2017−2020)
Release date	19 April 2009 (15 years ago)	18 September 2019 (5 years ago)

Detailed specifications

Core 2 Quad Q8400s 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	2.66 GHz	2.6 GHz
Boost clock speed	0.67 GHz	3.3 GHz
Bus rate	1333 MHz	no data
Multiplier	no data	26
L1 cache	64 KB (per core)	96K (per core)
L2 cache	4 MB (shared)	512K (per core)
L3 cache	0 KB	256 MB (shared)
Chip lithography	45 nm	7 nm, 14 nm
Die size	2x 82 mm2	192 mm2
Maximum case temperature (TCase)	76 °C	no data
Number of transistors	456 million	4,800 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+
VID voltage range	0.85V-1.3625V	no data

Compatibility

Information on Core 2 Quad Q8400s 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	FCLGA775,LGA775	TR4
Power consumption (TDP)	65 Watt	280 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q8400s and EPYC 7H12. You'll probably need this information if you require some particular technology.

AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	-	no data
Status	Discontinued	no data
Precision Boost 2	no data	+

Security technologies

Core 2 Quad Q8400s and EPYC 7H12 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q8400s and EPYC 7H12 are enumerated here.

AMD-V	-	+
VT-x	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400s and EPYC 7H12. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, 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	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

no data

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q8400s and EPYC 7H12.

PCIe version

2.0

no data

Pros & cons summary

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Recency	19 April 2009	18 September 2019
Physical cores	4	64
Threads	4	128
Chip lithography	45 nm	7 nm
Power consumption (TDP)	65 Watt	280 Watt

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Should you still have questions on choice between Core 2 Quad Q8400s and EPYC 7H12, ask them in Comments section, and we shall answer.

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