Pentium 977 vs Xeon E5-2650 v4

Primary details

Comparing Xeon E5-2650 v4 and Pentium 977 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	886	2684
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.62	no data
Market segment	Server	Laptop
Series	Intel Xeon E5	Intel Pentium
Power efficiency	7.70	4.01
Architecture codename	Broadwell-EP (2016)	Sandy Bridge (2011−2013)
Release date	16 March 2016 (8 years ago)	16 January 2012 (12 years ago)
Launch price (MSRP)	$1,166	$134

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5-2650 v4 and Pentium 977 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	12 (Dodeca-Core)	2 (Dual-core)
Threads	24	2
Base clock speed	2.2 GHz	1.4 GHz
Boost clock speed	2.9 GHz	1.4 GHz
Bus type	QPI	DMI 2.0
Bus rate	2 × 9.6 GT/s	4 × 5 GT/s
Multiplier	22	14
L1 cache	64 KB (per core)	128 KB
L2 cache	256 KB (per core)	512 KB
L3 cache	30 MB (shared)	2 MB (shared)
Chip lithography	14 nm	32 nm
Die size	306.18 mm2	131 mm2
Maximum core temperature	80 °C	100 °C
Number of transistors	3,400 million	504 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E5-2650 v4 and Pentium 977 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 (Multiprocessor)	1 (Uniprocessor)
Socket	FCLGA2011	FCBGA1023
Power consumption (TDP)	105 Watt	17 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2650 v4 and Pentium 977. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2
AES-NI	+	-
FMA	-	+
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
My WiFi	no data	-
Turbo Boost Technology	2.0	-
Hyper-Threading Technology	+	-
TSX	+	-
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	-	+
Demand Based Switching	+	-
PAE	46 Bit	no data
FDI	no data	+
Fast Memory Access	no data	+

Security technologies

Xeon E5-2650 v4 and Pentium 977 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+
Secure Key	+	no data
OS Guard	+	no data
Anti-Theft	no data	-

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2650 v4 and Pentium 977 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2650 v4 and Pentium 977. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866, DDR4-2133, DDR4-2400	DDR3
Maximum memory size	1.5 TB	16.38 GB
Max memory channels	4	2
Maximum memory bandwidth	76.8 GB/s	21.335 GB/s
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	N/A	Intel® HD Graphics for 2nd Generation Intel® Processors
Graphics max frequency	no data	1 GHz

Graphics interfaces

Available interfaces and connections of Xeon E5-2650 v4 and Pentium 977 integrated GPUs.

Number of displays supported	no data	2
eDP	no data	+
DisplayPort	-	+
HDMI	-	+
SDVO	no data	+
CRT	no data	+

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2650 v4 and Pentium 977.

PCIe version	3.0	2.0
PCI Express lanes	40	16

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	8.54	0.72
Recency	16 March 2016	16 January 2012
Physical cores	12	2
Threads	24	2
Chip lithography	14 nm	32 nm
Power consumption (TDP)	105 Watt	17 Watt

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Should you still have questions on choice between Xeon E5-2650 v4 and Pentium 977, ask them in Comments section, and we shall answer.

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