Xeon 6979P vs Pentium D 840

Primary details

Comparing Pentium D 840 and Xeon 6979P processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Architecture codename	Smithfield (2005)	Granite Rapids (2024)
Release date	May 2005 (19 years ago)	24 September 2024 (less than a year ago)

Detailed specifications

Pentium D 840 and Xeon 6979P 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)	120
Threads	2	240
Base clock speed	3.2 GHz	2.1 GHz
Boost clock speed	3.2 GHz	3.9 GHz
L1 cache	28 KB	112 KB (per core)
L2 cache	2 MB	2 MB (per core)
L3 cache	0 KB	504 MB (shared)
Chip lithography	90 nm	5 nm
Die size	206 mm2	no data
Maximum core temperature	70 °C	no data
Maximum case temperature (TCase)	no data	80 °C
Number of transistors	169 million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data
VID voltage range	1.2V-1.4V	no data

Compatibility

Information on Pentium D 840 and Xeon 6979P 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	2
Socket	PLGA775	7529
Power consumption (TDP)	130 Watt	500 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 840 and Xeon 6979P. You'll probably need this information if you require some particular technology.

AES-NI	-	+
AVX	-	+
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 840 and Xeon 6979P 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 840 and Xeon 6979P are enumerated here.

VT-d	-	+
VT-x	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 840 and Xeon 6979P. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by Pentium D 840 and Xeon 6979P.

PCIe version	no data	5.0
PCI Express lanes	no data	96

Pros & cons summary

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Physical cores	2	120
Threads	2	240
Chip lithography	90 nm	5 nm
Power consumption (TDP)	130 Watt	500 Watt

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