FX-8120 vs Xeon E5-2658

Primary details

Comparing Xeon E5-2658 and FX-8120 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1434	1358
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.46	no data
Market segment	Server	Desktop processor
Architecture codename	Sandy Bridge-EP (2012)	Zambezi (2011−2012)
Release date	6 March 2012 (12 years ago)	12 October 2011 (12 years ago)
Launch price (MSRP)	$1,462	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5-2658 and FX-8120 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	8 (Octa-Core)	8 (Octa-Core)
Threads	16	8
Base clock speed	2.1 GHz	3.1 GHz
Boost clock speed	2.4 GHz	4 GHz
L1 cache	64 KB (per core)	384 KB
L2 cache	256 KB (per core)	8192 KB
L3 cache	20480 KB (shared)	8192 KB
Chip lithography	32 nm	32 nm
Die size	435 mm2	315 mm2
Maximum core temperature	no data	61 °C
Number of transistors	2,270 million	1,200 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	-	+
P0 Vcore voltage	no data	Min: 1.0125 V - Max: 1.4125 V

Compatibility

Information on Xeon E5-2658 and FX-8120 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	2011	AM3+
Power consumption (TDP)	95 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2658 and FX-8120. You'll probably need this information if you require some particular technology.

AES-NI	+	+
FMA	-	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Hyper-Threading Technology	+	no data

Security technologies

Xeon E5-2658 and FX-8120 technologies aimed at improving security, for example, by protecting against hacks.

TXT

+

no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2658 and FX-8120 are enumerated here.

AMD-V

-

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2658 and FX-8120. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

DDR3

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2658 and FX-8120.

PCIe version

3.0

n/a

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.

Pros & cons summary

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Performance score	3.93	4.26
Recency	6 March 2012	12 October 2011
Threads	16	8
Power consumption (TDP)	95 Watt	125 Watt

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Should you still have questions on choice between Xeon E5-2658 and FX-8120, ask them in Comments section, and we shall answer.

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