Ultra 9 285K vs Pentium D 820

Primary details

Comparing Pentium D 820 and Core Ultra 9 285K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	53
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	69.52
Market segment	Desktop processor	Desktop processor
Series	Pentium D	no data
Power efficiency	no data	32.38
Architecture codename	Smithfield (2005)	Arrow Lake-S (2024−2025)
Release date	May 2005 (19 years ago)	24 October 2024 (recently)
Launch price (MSRP)	no data	$589

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium D 820 and Core Ultra 9 285K 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)	24 (Tetracosa-Core)
Threads	2	24
Base clock speed	2.8 GHz	3.7 GHz
Boost clock speed	2.8 GHz	5.7 GHz
Bus rate	800 MHz	250 MHz
L1 cache	28 KB	112 KB (per core)
L2 cache	2 MB	3 MB (per core)
L3 cache	0 KB	36 MB (shared)
Chip lithography	90 nm	3 nm
Die size	206 mm2	243 mm2
Maximum core temperature	64 °C	no data
Number of transistors	169 million	17,800 million
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	-	+
VID voltage range	1.2V-1.4V	no data

Compatibility

Information on Pentium D 820 and Core Ultra 9 285K 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	2	1
Socket	PLGA775	1851
Power consumption (TDP)	95 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 820 and Core Ultra 9 285K. You'll probably need this information if you require some particular technology.

AES-NI	-	+
AVX	-	+
vPro	no data	+
Enhanced SpeedStep (EIST)	-	+
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
TSX	-	+
Idle States	+	no data
Demand Based Switching	-	no data
PAE	32 Bit	no data
FSB parity	-	no data

Security technologies

Pentium D 820 and Core Ultra 9 285K technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium D 820 and Core Ultra 9 285K are enumerated here.

VT-d	-	+
VT-x	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 820 and Core Ultra 9 285K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR5 Depends on motherboard

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

Arc Xe-LPG Graphics 64EU

Peripherals

Specifications and connection of peripherals supported by Pentium D 820 and Core Ultra 9 285K.

PCIe version	no data	5.0
PCI Express lanes	no data	20

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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Pros & cons summary

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Physical cores	2	24
Threads	2	24
Chip lithography	90 nm	3 nm
Power consumption (TDP)	95 Watt	125 Watt

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Should you still have questions on choice between Pentium D 820 and Core Ultra 9 285K, ask them in Comments section, and we shall answer.

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