EPYC 7742 vs Pentium D 945

Primary details

Comparing Pentium D 945 and EPYC 7742 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	not rated	44
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	2.72
Market segment	Desktop processor	Server
Series	no data	AMD EPYC
Architecture codename	Presler (2005−2007)	Zen 2 (2017−2020)
Release date	23 July 2006 (18 years ago)	7 August 2019 (5 years ago)
Launch price (MSRP)	no data	$6,950

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium D 945 and EPYC 7742 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	3.4 GHz	2.25 GHz
Boost clock speed	3.4 GHz	3.4 GHz
Multiplier	no data	22.5
L1 cache	16 KB (per core)	4 MB
L2 cache	2 MB (per die)	32 MB
L3 cache	0 KB	256 MB (shared)
Chip lithography	65 nm	7 nm, 14 nm
Die size	2x 81 mm2	192 mm2
Maximum case temperature (TCase)	63 °C	no data
Number of transistors	376 million	4,800 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+
VID voltage range	1.2V-1.3375V	no data

Compatibility

Information on Pentium D 945 and EPYC 7742 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	LGA775,PLGA775	TR4
Power consumption (TDP)	95 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 945 and EPYC 7742. 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
Demand Based Switching	-	no data
PAE	32 Bit	no data
FSB parity	-	no data
Status	Discontinued	no data
Precision Boost 2	no data	+

Security technologies

Pentium D 945 and EPYC 7742 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 Pentium D 945 and EPYC 7742 are enumerated here.

AMD-V	-	+
VT-d	-	no data
VT-x	-	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 945 and EPYC 7742. 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

Pros & cons summary

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Recency	23 July 2006	7 August 2019
Physical cores	2	64
Threads	2	128
Chip lithography	65 nm	7 nm
Power consumption (TDP)	95 Watt	225 Watt

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