Pentium D 915 vs Xeon X5687

Primary details

Comparing Xeon X5687 and Pentium D 915 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1567	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.39	no data
Market segment	Server	Desktop processor
Power efficiency	2.43	no data
Architecture codename	Westmere-EP (2010−2011)	Presler (2005−2007)
Release date	14 February 2011 (13 years ago)	23 July 2006 (18 years ago)
Launch price (MSRP)	$121	$74

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon X5687 and Pentium D 915 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)	2 (Dual-core)
Threads	8	2
Base clock speed	3.6 GHz	2.8 GHz
Boost clock speed	3.86 GHz	2.8 GHz
L1 cache	64 KB (per core)	16 KB (per core)
L2 cache	256 KB (per core)	2 MB (per die)
L3 cache	12 MB (shared)	0 KB
Chip lithography	32 nm	65 nm
Die size	239 mm2	2x 81 mm2
Maximum core temperature	80 °C	no data
Maximum case temperature (TCase)	no data	63 °C
Number of transistors	1,170 million	376 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	no data	1.2V-1.3375V

Compatibility

Information on Xeon X5687 and Pentium D 915 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	FCLGA1366,LGA1366	LGA775,PLGA775
Power consumption (TDP)	130 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon X5687 and Pentium D 915. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
AES-NI	+	-
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	-
Hyper-Threading Technology	+	-
Idle States	+	+
Demand Based Switching	+	-
PAE	40 Bit	32 Bit
FSB parity	no data	-

Security technologies

Xeon X5687 and Pentium D 915 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon X5687 and Pentium D 915 are enumerated here.

VT-d	+	-
VT-x	+	-
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon X5687 and Pentium D 915. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR1, DDR2, DDR3
Maximum memory size	288 GB	no data
Max memory channels	3	no data
Maximum memory bandwidth	32 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

On certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Xeon X5687 and Pentium D 915.

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.

---

---

Pros & cons summary

---

Recency	14 February 2011	23 July 2006
Physical cores	4	2
Threads	8	2
Chip lithography	32 nm	65 nm
Power consumption (TDP)	130 Watt	95 Watt

---

Should you still have questions on choice between Xeon X5687 and Pentium D 915, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---