Pentium D 820 vs Phenom II X6 1045T

Primary details

Comparing Phenom II X6 1045T and Pentium D 820 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1928	3102
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.29	no data
Market segment	Desktop processor	Desktop processor
Series	no data	Pentium D
Power efficiency	2.01	0.31
Architecture codename	Thuban (2010)	Smithfield (2005)
Release date	1 September 2010 (14 years ago)	May 2005 (19 years ago)
Launch price (MSRP)	$175	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Phenom II X6 1045T and Pentium D 820 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	6 (Hexa-Core)	2 (Dual-core)
Threads	6	2
Base clock speed	2.7 GHz	2.8 GHz
Boost clock speed	3.2 GHz	2.8 GHz
Bus rate	no data	800 MHz
L1 cache	128 KB (per core)	28 KB
L2 cache	512 KB (per core)	2 MB
L3 cache	6 MB (shared)	0 KB
Chip lithography	45 nm	90 nm
Die size	346 mm2	206 mm2
Maximum core temperature	no data	64 °C
Number of transistors	904 million	169 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	no data	1.2V-1.4V

Compatibility

Information on Phenom II X6 1045T and Pentium D 820 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
Socket	AM3	PLGA775
Power consumption (TDP)	95 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Phenom II X6 1045T and Pentium D 820. You'll probably need this information if you require some particular technology.

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	no data	32 Bit
FSB parity	no data	-

Security technologies

Phenom II X6 1045T and Pentium D 820 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 Phenom II X6 1045T and Pentium D 820 are enumerated here.

VT-d	no data	-
VT-x	no data	-

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X6 1045T and Pentium D 820. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

DDR1, DDR2, DDR3

Peripherals

Specifications and connection of peripherals supported by Phenom II X6 1045T and Pentium D 820.

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.

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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.

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Pros & cons summary

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Performance score	2.02	0.31
Physical cores	6	2
Threads	6	2
Chip lithography	45 nm	90 nm

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Should you still have questions on choice between Phenom II X6 1045T and Pentium D 820, ask them in Comments section, and we shall answer.

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